Journal of Prosthodontics via MedWorm.com

Use of Vacuum-Formed Templates to Guide Tooth Preparation and Insertion of Interim Restorations

Journal of Prosthodontics — Fri, 26 Feb 2010 00:00:00 +0100

Ideal tooth preparation and interim prostheses are critical to a predictable esthetic and functional outcome in the treatment of full-mouth-fixed restorations. During the treatment stages, multiple procedures need to be considered for a successful and predictable outcome. These include the parallel preparation of multiple abutment teeth followed by the relining of the interim prostheses. The purpose of this article is to describe a technique to simplify tooth preparation and facilitate subsequent insertion of a complete-arch-fixed interim prosthesis using vacuum-formed templates. (Source: Journal of Prosthodontics)

Bonding to Zirconia Using a New Surface Treatment

Journal of Prosthodontics — Thu, 25 Feb 2010 00:00:00 +0100

Conclusion: SIE established a strong, stable, and durable bond to zirconia substrates. Conservative resin-bonded zirconia restorations are now possible using this new technique. (Source: Journal of Prosthodontics)

Effect of Sodium Ascorbate and the Time Lapse before Cementation after Internal Bleaching on Bond Strength between Dentin and Ceramic

Journal of Prosthodontics — Thu, 25 Feb 2010 00:00:00 +0100

Conclusions: After NVB, adhesive luting to dentin is recommended after 7 days if sodium ascorbate has been applied prior to dentin hybridization. (Source: Journal of Prosthodontics)

Private Practice of Prosthodontists: Current Conditions of Practice in the United States

Journal of Prosthodontics — Thu, 25 Feb 2010 00:00:00 +0100

Conclusion: In 2007, prosthodontists in private practice paid out about $1.4 billion in practice expenses to provide $2.2 billion dollars in prosthodontic care. Based on survey results from 2007 and the previous 6 years, specialization in prosthodontic care continues to be an economically attractive and productive healthcare profession in the United States. (Source: Journal of Prosthodontics)

The History of Articulators: The Contributions of Rudolph L. Hanau and his Company—Part I

Journal of Prosthodontics — Thu, 25 Feb 2010 00:00:00 +0100

This article is a historical review of the last decade of Rudolph Hanau's life. It covers his introduction to dentistry and explores his prolific articulator designs and contributions to the prosthodontic literature. (Source: Journal of Prosthodontics)

Five-Year Follow-Up Treatment of an Ectodermal Dysplasia Patient with Maxillary Anterior Composites and Mandibular Denture: A Clinical Report

Journal of Prosthodontics — Thu, 25 Feb 2010 00:00:00 +0100

This clinical report describes the 5-year follow-up treatment of an 11-year-old boy with ectodermal dysplasia. The dentition was initially restored with a combination of maxillary anterior-bonded composite restorations and a mandibular complete denture. This individualized approach allowed successful management of the patient. (Source: Journal of Prosthodontics)

Resident Selection Criteria for Advanced Education in Prosthodontic Programs: Program Directors' Perspective

Journal of Prosthodontics — Sat, 20 Feb 2010 00:00:00 +0100

Conclusions: The most and least important factors in selecting applicants by the program directors were described and ranked. This study was intended to provide the profession with some insight on how advanced Prosthodontic programs select their applicants. It may also serve as a valuable instrument for prospective applicants to AEPPs in the future. (Source: Journal of Prosthodontics)

Corrosion Behavior of As-Received and Previously Cast Type III Gold Alloy

Journal of Prosthodontics — Fri, 19 Feb 2010 00:00:00 +0100

Conclusions: Type III gold alloy in any casting protocol retained passivity under electrochemical conditions similar to the oral environment. Moreover, high-gold type III alloys from reputable manufacturers and recasting protocol tested should produce acceptable corrosion-resistant castings. (Source: Journal of Prosthodontics)

Effect of Net Fiber Reinforcement Surface Treatment on Soft Denture Liner Retention and Longevity

Journal of Prosthodontics — Fri, 19 Feb 2010 00:00:00 +0100

Conclusions: Molloplast-B exhibited a stronger bond to StickTech Net fiber-reinforced surfaces when compared to smooth and rough acrylic interfaces after thermocycling. This may enhance prosthesis serviceability during clinical use. (Source: Journal of Prosthodontics)

Model System for Measuring the Effects of Position and Curvature of Fiber Reinforcement Within a Dental Composite

Journal of Prosthodontics — Fri, 19 Feb 2010 00:00:00 +0100

Conclusion: Position and fiber orientation influenced the flexural strength, FM, and toughness. The most effective in increasing toughness was curved placement of fibers. (Source: Journal of Prosthodontics)

In Vivo and In Vitro Assessment of an Intraoral Dental Colorimeter

Journal of Prosthodontics — Fri, 19 Feb 2010 00:00:00 +0100

Purpose: The purpose of this study was to assess the performance of an intraoral dental colorimeter. Materials and Methods: In vivo repeatability of an intraoral colorimeter was assessed by performing color measurements of 30 individuals' right maxillary central incisor. Three consecutive measurements from each individual were made. In the in vitro part of the study, 25 metal-ceramic and 25 all-ceramic specimens were prepared. Five shades of metal-ceramic and all-ceramic specimens were selected for color determination. A widely recognized in vitro colorimeter was used as the control group for the in vitro performance assessment of the in vivo colorimeter. The color differentiation capability of two colorimeters was compared with the readings obtained from ceramic specimens. [Delta]E values...

Patient Recall in Advanced Education in Prosthodontics Programs in the United States

Journal of Prosthodontics — Fri, 19 Feb 2010 00:00:00 +0100

Conclusions: Prosthodontic program directors felt their program's recall effectiveness could be improved. Due to the numerous potential benefits of an active recall system, AEPPs should consider implementing or enhancing their recall programs. Further studies are indicated to determine specific criteria that describe an effective recall system for prosthodontic programs within the context of patient health promotion, program curriculum, and financial ramifications. (Source: Journal of Prosthodontics)

An Easy Technique to Obtain Articulated Casts Using the Palate for the Interocclusal Record

Journal of Prosthodontics — Thu, 18 Feb 2010 00:00:00 +0100

This article describes a highly efficient technique to obtain articulated casts. Interocclusal recording is carried out using the palate as an area of registration without having to remove or section provisional prostheses while also maintaining the established vertical dimension. (Source: Journal of Prosthodontics)

Porcelain Fracture Resistance of Screw-Retained, Cement-Retained, and Screw-Cement-Retained Implant-Supported Metal Ceramic Posterior Crowns

Journal of Prosthodontics — Sat, 30 Jan 2010 00:00:00 +0100

Conclusion: The cement-retained restorations showed significantly higher mean fracture loads than the restorations having screw-access openings in their occlusal surface. The position of the screw-access hole within the occlusal surface did not significantly affect the porcelain fracture resistance. (Source: Journal of Prosthodontics)

Sectional Impressions and Simplified Folding Complete Denture for Severe Microstomia

Journal of Prosthodontics — Sat, 23 Jan 2010 00:00:00 +0100

A patient presenting with severe microstomia (PDI Class IV) was unable to insert a maxillary complete denture. Sectional final impressions were made using two impression materials and an interlocking custom tray. A folding record base was used for maxillomandibular relationship records. A novel folding maxillary denture with a custom hinge and plunger attachment to lock the denture in the open position was fabricated. The patient was able to insert the collapsed denture, open it intraorally, and enjoy successful masticatory function. (Source: Journal of Prosthodontics)

The Abrasive Effect of a Porcelain and a Nickel–Chromium Alloy on the Wear of Human Enamel and the Influence of a Carbonated Beverage on the Rate of Wear

Journal of Prosthodontics — Fri, 22 Jan 2010 00:00:00 +0100

Conclusions: The wear of human enamel was significantly higher in the presence of carbonated beverage than artificial saliva and against porcelain when compared with Ni[ndash]Cr. The surface roughness of porcelain in the presence of carbonated beverage was found to be highest, and the release of Ni and Cr was not affected by carbonated beverage. (Source: Journal of Prosthodontics)

Reducing the Incidence of Denture Stomatitis: Are Denture Cleansers Sufficient?

Journal of Prosthodontics — Fri, 22 Jan 2010 00:00:00 +0100

Conclusions: This study showed that denture cleansers exhibit effective anti-C. albicans biofilm activity, both in terms of removal and disinfection; however, residual biofilm retention that could lead to regrowth and denture colonization was observed. Therefore, alternative mechanical disruptive methods are required to enhance biofilm removal. (Source: Journal of Prosthodontics)

Gender Differences in the Amount of Gingival Display During Smiling Using Two Intraoral Dental Biometric Measurements

Journal of Prosthodontics — Fri, 22 Jan 2010 00:00:00 +0100

Conclusions: Significantly more women displayed gingiva in smiling. Men had significantly wider and longer central incisors. No differences were recorded between men and women relative to both the horizontal and vertical anterior tooth overlap. Subjects who displayed gingiva when smiling had more horizontal and vertical overlap of anterior teeth. (Source: Journal of Prosthodontics)

Orthodontically Assisted Vertical Augmentation in the Esthetic Zone

Journal of Prosthodontics — Fri, 22 Jan 2010 00:00:00 +0100

Severe periodontal disease leading to tooth loss causes multiple challenges when treatment planning replacement of these teeth with implant-supported restorations. Provisionalization and transitioning the patient from natural dentition to implant-supported restorations without use of removable prostheses can be difficult to achieve. A detailed evaluation and comprehensive treatment plan should precede extraction of the affected teeth. Forced eruption as a method of modifying the osseous and gingival topography has been established. This clinical report illustrates the use of nonmaintainable teeth to simultaneously develop the site for future implant placement, as well as support a fixed interim restoration during treatment. Patient was classified as an American College of Prosthodontists P...

Conversion Degree of Indirect Resin Composites and Effect of Thermocycling on Their Physical Properties

Journal of Prosthodontics — Tue, 22 Dec 2009 00:00:00 +0100

Conclusion: Although all four IRCs presented nonsignificant DC values, flexural strength and microhardness values varied between materials with and without thermocycling. (Source: Journal of Prosthodontics)

Influence of Surface Treatment on the Shear Bond Strength of Ceramics Fused to Cobalt–Chromium

Journal of Prosthodontics — Mon, 21 Dec 2009 00:00:00 +0100

Conclusions: Air-particle abrasion with Al2O3 improved the shear bond strength between metal and ceramics used. (Source: Journal of Prosthodontics)

Effect of Surface Conditioning and Taper Angle on the Retention of IPS e.max Press Crowns

Journal of Prosthodontics — Mon, 21 Dec 2009 00:00:00 +0100

Conclusion: Neither the surface conditioning type, nor the taper angle affected the retentive strength of IPS e.max Press single-unit crowns when cemented adhesively. Since silica coating and silanization did not show significant differences from HF acid gel and silanization, the former can be preferred for conditioning intaglio surfaces of glass ceramic crowns to avoid the use of the hazardous compound HF acid gel chairside. (Source: Journal of Prosthodontics)

Predoctoral Implant Education: The Creighton Experience at 20 Years

Journal of Prosthodontics — Mon, 21 Dec 2009 00:00:00 +0100

The landscape of predoctoral implant education has changed dramatically in the short span of two decades. Documented success and increased patient demands have driven heightened expectations upon the educational community. Predoctoral education must play a pivotal role in preparing the profession to meet these new opportunities. The evolution of implant education in the predoctoral sector is examined, and a typical implant program is described. (Source: Journal of Prosthodontics)

The Effect of Denture Cleansing Solutions on the Retention of Pink Locator Attachments: An in Vitro Study

Journal of Prosthodontics — Mon, 21 Dec 2009 00:00:00 +0100

Conclusion: Cool Mint Listerine and Efferdent's small effect on the retentive values of the Locators might be clinically unimportant; however, NaOCl caused a large reduction in the retentive values of the attachments. Because of their effect on retentive values and on the color of the Locator attachments, NaOCl and Cool Mint Listerine are not recommended. These results should be interpreted clinically with caution, realizing that different results may be obtained when fatigue stress during function and multiple pulls (in vivo) are combined with the chemical action of denture cleansers. (Source: Journal of Prosthodontics)

Implant-Supported Obturator Overdenture for Extensive Maxillary Resection Patient: A Clinical Report

Journal of Prosthodontics — Thu, 17 Dec 2009 00:00:00 +0100

This clinical report presents an implant-retained obturator overdenture solution for a Prosthodontic Diagnostic Index Class IV maxillectomy patient with a large oronasal communication and severe facial asymmetry, loss of upper lip and midfacial support, severe impairment of mastication, deglutition, phonetics, and speech intelligibility. Due to insufficient bone support to provide satisfactory zygomaticus implant anchorage, conventional implants were placed in the body of the left zygomatic arch and in the right maxillary tuberosity. Using a modified impression technique, a cobalt-chromium alloy framework with three overdenture attachments was constructed to retain a complete maxillary obturator. Patient-reported functional and quality of life measure outcomes were dramatically improved af...

Bond Strength, Microhardness, and Core/Veneer Interface Quality of an All-Ceramic System

Journal of Prosthodontics — Wed, 16 Dec 2009 00:00:00 +0100

Conclusions: In-Ceram core/Vitadur N disc debondings appeared to be interfacial by complete delaminations, leaving a shiny visible and quite distinct area, whereas there appeared to be perfect adhesion between the core and VM7 veneering material. VM7 appeared to possess ultra-fine texture with intimate contact to the core, forming what seemed like a transition zone where the ceramic and core appeared to blend for a distance. VM7's finer particle size has improved the core/veneer bond strength and decreased micohardness values. This new veneering material will probably enhance the performance and esthetics of the In-Ceram system. (Source: Journal of Prosthodontics)

Alternative Pretreatment Modalities with a Self-Adhesive System to Promote Dentin/Alloy Shear Bond Strength

Journal of Prosthodontics — Wed, 16 Dec 2009 00:00:00 +0100

Conclusions: Pretreatment of dentin with G-Bond and Zinc Zeolite improved the dentin/alloy shear bond strength. Base metal alloys provided superior bond strength values with any adhesive modality compared to noble alloys. Treatment of the dentin surface prior to the application of a self-adhesive system is of great importance to enhancement of the dentin/alloy bond strength. (Source: Journal of Prosthodontics)

Human Perception of Dental Porcelain Translucency Correlated to Spectrophotometric Measurements

Journal of Prosthodontics — Wed, 16 Dec 2009 00:00:00 +0100

Conclusions: The overall mean TPT of all subjects was 0.07, and 50% of the study population perceived a 0.06 CR difference in translucency. Increased shade matching experience ([ge]10 years) significantly improved the ability to perceive differences in translucency; however, neither the viewing condition nor porcelain opacity affected the perceived translucency threshold. (Source: Journal of Prosthodontics)

Orthodontics Using an Occlusal Splint: A Clinical Report

Journal of Prosthodontics — Wed, 16 Dec 2009 00:00:00 +0100

Careful management of the occlusion is necessary for successful prosthodontic treatment. A reorganized occlusal approach requires a more accurate registration of the desired jaw position, and where it is difficult to achieve this, an occlusal splint is indicated. This clinical report documents a 60-year-old man with a Prosthodontic Diagnostic Index Class IV dentition, who prior to a full-mouth reconstruction, underwent occlusal splint therapy with a Michigan-type splint that incorporated z-springs to allow concurrent orthodontic tooth movement of two anterior teeth to positions that would allow favorable restorations by correcting occlusal and esthetic form. (Source: Journal of Prosthodontics)

Relationship Between Pterygomaxillary Notches and Maxillary Anterior Teeth

Journal of Prosthodontics — Wed, 16 Dec 2009 00:00:00 +0100

Conclusion: Total mesiodistal width of the maxillary anterior teeth correlated with the distance between pterygomaxillary notches; however, measurement of the interpterygomaxillary notch could not be used for tooth selection reliably due to the low standardized coefficient. Within the limitations of this study, the interpterygomaxillary notch distance is not useful for the selection of six maxillary anterior teeth in edentulous patients. (Source: Journal of Prosthodontics)

The History of Articulators: The "Articulator Wars" Phenomenon with Some Circumstances Leading up to It

Journal of Prosthodontics — Fri, 04 Dec 2009 00:00:00 +0100

At the dawn of the 20th century, all was not well with the practice of "plate prostheses." Removable prosthodontics had been degrading for several decades and was now generally in low esteem, even though there had been many significant advances. W. E. Walker had introduced adjustable condylar guides, George Snow, the facebow, and Carl Christensen, a method for clinically measuring the condylar inclines. Nevertheless, the average practicing dentist was still using simple hinge articulators and was apathetic to the deplorable state of the artificial teeth available; however, this was all going to change dramatically when two dentists, Alfred Gysi and J. Leon Williams, working together between 1910 and 1914, presented to the profession the "Trubyte Artificial Tooth System" that embodied both ...

Effect of 180 Days of Water Storage on the Transverse Strength of Acetal Resin Denture Base Material

Journal of Prosthodontics — Thu, 03 Dec 2009 00:00:00 +0100

Conclusion: The results of this study indicated that transverse strength values of PMMA were within the ISO specification limit. Water storage time (50 hours, 30, 60, and 180 days) had no statistically significant effect on the transverse strength and deflection of PMMA. Acetal resin suffered from permanent deformation, but did not break in the three-point bending test. Acetal resin showed significant increase in deflection as the water storage time was increased from 50 hours to 180 days. All materials tested demonstrated deflection values in compliance with ISO specification No 1567. (Source: Journal of Prosthodontics)

Effect of Different Cements on the Biomechanical Behavior of Teeth Restored with Cast Dowel-and-Cores—In Vitro and FEA Analysis

Journal of Prosthodontics — Thu, 03 Dec 2009 00:00:00 +0100

Conclusions: The type of cement influenced fracture resistance, failure mode, and stress distribution on teeth restored with cast dowel-and-cores. (Source: Journal of Prosthodontics)

Bond Strength of Resin Cements to Co-Cr and Ni-Cr Metal Alloys Using Adhesive Primers

Journal of Prosthodontics — Thu, 03 Dec 2009 00:00:00 +0100

Conclusions: The use of AP between alloy metal surfaces and resin cements did not increase the bond strength for most cementing systems evaluated. (Source: Journal of Prosthodontics)

Color Stability of Denture Acrylic Resins and a Soft Lining Material Against Tea, Coffee, and Nicotine

Journal of Prosthodontics — Thu, 03 Dec 2009 00:00:00 +0100

Conclusions: The effect of staining solutions on the color of each test material in each session was perceivable by the human eye ([Delta]E > 1); however, the color shifts of all test materials were clinically acceptable ([Delta]E < 3.7) except for soft liner in nicotine, which was not clinically acceptable over time. Therefore, minimizing drinking of such beverages and use of tobacco, particularly when soft liner is applied, may be advantageous for denture wearers for long-term color stability. (Source: Journal of Prosthodontics)

Effects of Clinical Experience and Explorer Type on Judged Crown Margin Acceptability

Journal of Prosthodontics — Thu, 03 Dec 2009 00:00:00 +0100

Conclusions: Differences among operators in a simulation of the decision regarding gaps in crowns accounted for 63% of the variance; type of explorer used in assisting this decision accounted for about half as much variance. Faculty members making such judgments exhibited high intra-operator consistency but significantly lower inter-operator consistency than did students. The study suggests that the internal standards dentists use for clinical decision making deserves further study as they may be as significant as the equipment used. (Source: Journal of Prosthodontics)

Advanced Education in Prosthodontics: Residents' Perspectives on Their Current Training and Future Goals

Journal of Prosthodontics — Thu, 03 Dec 2009 00:00:00 +0100

Conclusion: This is the first report identifying current prosthodontic residents' demographics and their perspectives on their clinical training and future goals. Several trends were identified, indicating a bright future for the specialty. By knowing the students' perceptions regarding their training and future goals, the American College of Prosthodontists and/or program directors will be able to use this information to improve residency programs and the specialty. (Source: Journal of Prosthodontics)

Survey of Currently Used Materials for Fabrication of Extraoral Maxillofacial Prostheses in North America, Europe, Asia, and Australia

Journal of Prosthodontics — Thu, 03 Dec 2009 00:00:00 +0100

Conclusions: The responses to this survey indicate that the majority of AAA and AAMP members are using or have used a variety of RTV silicones, pigments, and colorants in the quest to provide the best possible facial prosthetic service. Further research is needed to further refine and improve extraoral maxillofacial materials/techniques based on the results of this study. (Source: Journal of Prosthodontics)

Investigation of Mechanical Properties of Experimental Bis-GMA/TEGDMA Dental Composite Resins Containing Various Mass Fractions of Silica Nanoparticles

Journal of Prosthodontics — Thu, 05 Nov 2009 00:00:00 +0100

Conclusions: Reinforcement of dental composite resins with silica nanoparticles resulted in a significant increase in the evaluated mechanical properties in comparison with the conventional composite. The filler mass fraction played a critical role in determining the composite's mechanical properties. (Source: Journal of Prosthodontics)

Methodology for Measuring the In Vitro Seating and Unseating Forces of Prefabricated Attachment Systems Used to Retain Implant Overdentures

Journal of Prosthodontics — Wed, 04 Nov 2009 00:00:00 +0100

Conclusions: Spherical stud attachments exhibited consistent seating and unseating forces over 10,000 cycles. A 20° angle between the patrix and matrix had no effect on the overall seating and unseating force values. (Source: Journal of Prosthodontics)

Intraoral Luting: Modified Prosthetic Design to Achieve Passivity, Precision of Fit, and Esthetics for a Cement-Retained, Implant-Supported Metal-Resin-Fixed Complete Denture

Journal of Prosthodontics — Wed, 04 Nov 2009 00:00:00 +0100

An intraoral luting technique between electroformed gold copings and a metallic framework for a cement-retained, implant-supported metal-resin-fixed complete-denture is presented. The peculiarity is the different prosthetic design with the metallic framework that was 1.5 mm shorter than the margin of the electroformed copings. As a consequence, the conventional thick prosthesis margin (electroformed copings, cement for the luting phase, framework) was modified into a thin electroformed prosthesis seal (0.3 mm) just beyond the apical limit of the esthetic material. Passive fit between the framework and the electroformed gold copings was achieved during the intraoral luting phase. The procedure was efficient and standardized and enhanced esthetics. (Source: Journal of Prosthodontics)

Sectional Impression Tray and Sectional Denture for a Microstomia Patient

Journal of Prosthodontics — Wed, 04 Nov 2009 00:00:00 +0100

Microstomia presents a unique challenge to the patient. Patients with microstomia who must wear removable dental prostheses often face the difficulty of being unable to insert or remove the prosthesis because of the constricted opening of the oral cavity. A completely edentulous patient, who developed microstomia along with Raynaud's phenomenon induced by scleroderma, is presented. This clinical report describes a quick and easy method for fabrication of a sectional custom impression tray connected by press button and a sectional complete denture retained by magnets. A sectional denture that provides ease in placement and removal can be successfully used in clinical practice for treatment of microstomia patients. (Source: Journal of Prosthodontics)

Proposals for Optimization of Laser Welding in Prosthetic Dentistry

Journal of Prosthodontics — Wed, 23 Sep 2009 23:00:00 +0100

This paper points out each key parameter involved in laser welding and discusses the parameters' effects on weld microstructure and defects detected inside the weld. Solutions are proposed to adjust the parameters to provide an optimal dental assembly. Metallurgical effects as well as defects are briefly discussed. A welding procedure adapted to different compositions of dental alloys is proposed. (Source: Journal of Prosthodontics)

Relationship between Oral Health-Related Quality of Life, Satisfaction, and Personality in Patients with Prosthetic Rehabilitations

Journal of Prosthodontics — Tue, 22 Sep 2009 23:00:00 +0100

Conclusion: Patients' satisfaction with their dentition and prosthetic rehabilitations has positive effects on oral health-related QoL and oral health impacts and improves patients' daily living and dental perceptions. Neuroticism might influence and predict patients' satisfaction with their dentition, oral health impacts, and oral health-related QoL. Satisfaction with the dentition might predict a patient's level of neuroticism. (Source: Journal of Prosthodontics)

Color Stability, Surface Roughness, and Surface Porosity of Acrylic Resins for Eye Sclera Polymerized by Different Heat Sources

Journal of Prosthodontics — Tue, 22 Sep 2009 23:00:00 +0100

Conclusion: It may be concluded that irrespective of the type of heat used for polymerization, there was an intense color alteration, to clinically unacceptable levels, when the specimens were submitted to AAA. For the other properties, alterations were less intense. (Source: Journal of Prosthodontics)

Variability of Mechanical Torque-Limiting Devices in Clinical Service at a US Dental School

Journal of Prosthodontics — Thu, 17 Sep 2009 23:00:00 +0100

Conclusions: Both types of wrenches tested were capable of producing accurate torque values; however, variability was higher in the toggle-type group. Some toggle-type torque wrenches in clinical service delivered unacceptably high torque values. It is recommended that clinicians calibrate toggle-type wrenches frequently. Torque wrenches should be activated slowly, over 4 seconds, when using a correctly calibrated toggle-type wrench. (Source: Journal of Prosthodontics)

The Effect of Bleaching Agents on the Surface Topography of Ceramometal Dental Alloys

Journal of Prosthodontics — Wed, 16 Sep 2009 23:00:00 +0100

Conclusion: Surface topographic alterations occurred as a result of the application of bleaching agents. These alterations increased with the increase of the carbamide peroxide concentration. (Source: Journal of Prosthodontics)

Analysis of Masticatory Cycle Efficiency in Complete Denture Wearers

Journal of Prosthodontics — Wed, 16 Sep 2009 23:00:00 +0100

Conclusion: The results of this study indicated that 5 months did not allow enough time to demonstrate improved muscular capacity and ability after receiving new dentures. After 1 year, the duration of the masticatory cycle was reduced, and masticatory efficiency was significantly improved. (Source: Journal of Prosthodontics)

The Retention of Cast Metal Dowels Fabricated by Direct and Indirect Techniques

Journal of Prosthodontics — Wed, 16 Sep 2009 23:00:00 +0100

Conclusion: Fabrication technique does not affect retention of cast dowels, except when zinc phosphate was the luting agent and placed in the canal space without using a lentulo spiral. The cementation procedure had a significant effect on retention; thus, it is recommended that cementation should be done using the lentulo spiral. (Source: Journal of Prosthodontics)

Clinical Success of Zirconia in Dental Applications

Journal of Prosthodontics — Mon, 14 Sep 2009 23:00:00 +0100

This article presents data regarding the incidence of clinical success and complications of zirconia in these dental applications. Clinical studies published to date seem to indicate that zirconia is well tolerated and sufficiently resistant. (Source: Journal of Prosthodontics)

Assessment of an Indirect Metal Ceramic Repair System

Journal of Prosthodontics — Sun, 13 Sep 2009 23:00:00 +0100

Conclusions: Omega-Ducera LFC yielded the statistically highest mean bond strength values, and the lowest biaxial strength values. All values were within the reported bond strength values for resin repair. All the tested groups showed significantly lower values compared to the initial biaxial strength mean values of the Omega ceramic; however, two of the tested ULFC (Vision, Finesse), recorded means that were statistically equal to the resin-ceramic direct subgroup. Duceram LFC showed the lowest values, probably due to its totally glass composition, which showed low strength values of the repaired specimens. The recorded bond and biaxial values suggest that indirect repair of fractured LFC using some ULFC ceramics may offer an alternative solution to the traditional direct resin repair met...

Using a Motion-Capture System to Record Dynamic Articulation for Application in CAD/CAM Software

Journal of Prosthodontics — Sun, 13 Sep 2009 23:00:00 +0100

Conclusions: The article described a methodology that measured mandibular movements during mastication for one subject. This produced kinematic input to 3D computer modeling for the production of a virtual dynamic articulation that is suitable for incorporation into dental CAD/CAM software. (Source: Journal of Prosthodontics)

Measurement of Interfacial Porosity at the Acrylic Resin/Denture Tooth Interface

Journal of Prosthodontics — Sun, 13 Sep 2009 23:00:00 +0100

Conclusions: Within the limitations of this in vitro study, it was concluded that the denture base resins evaluated did not affect porosity formation at the artificial tooth/denture base resin interface. (Source: Journal of Prosthodontics)

Alveolar Distraction Osteogenesis: Revive and Restore the Native Bone

Journal of Prosthodontics — Sun, 13 Sep 2009 23:00:00 +0100

The objective of this overview is to explain this procedure wherein the alveolar housing, including the osseous and soft-tissue components, is enlarged in a single, simultaneous process, which makes creation of an appropriate alveolar morphology possible. (Source: Journal of Prosthodontics)

Palatal Anchorage for the Retention of Interim Removable Prostheses

Journal of Prosthodontics — Thu, 13 Aug 2009 23:00:00 +0100

This paper describes a technique that involves the use of palatal implants to retain a maxillary interim prosthesis when extensive bone graft procedures are performed. The rationale is that some bone graft procedures require the removal of the denture flanges for graft success. Once the denture flanges are removed, the denture loses all its retention capabilities, making this lengthy interim phase difficult for the patient. While the use of palatal implants has been documented extensively, limited information is available to describe the use of palatal implants for prosthetic reasons. (Source: Journal of Prosthodontics)

Effect of Light-Emitting Diode (LED) Curing Modes on Resin/Dentin Bond Strength

Journal of Prosthodontics — Wed, 12 Aug 2009 23:00:00 +0100

Conclusion: Within the limitations of this study, the shear bond strength of an RLA to dentin was found to be enhanced with light- or dual-polymerized adhesive resin using an LED light in ramp mode, whereas shear bond strength was significantly lower when polymerized using LED in fast or pulse modes. (Source: Journal of Prosthodontics)

Force Needed to Separate Acrylic Resin from Primed and Unprimed Frameworks of Different Designs

Journal of Prosthodontics — Wed, 12 Aug 2009 23:00:00 +0100

Conclusions: Significantly increased force was necessary to separate the acrylic from each design of primed test specimens compared with unprimed specimens of the same design. The primed metal plate with beads exhibited significantly greater separation force than the other three designs. Primed mesh had significantly greater separation force values than primed lattice and smooth metal plate. Primed lattice was significantly less retentive than the other three primed designs. Except for the retentive mesh specimens, there was higher occurrence of cohesive failures in the acrylic resin when the frameworks were primed. (Source: Journal of Prosthodontics)

Comparison of the Passivity between Cast Alloy and Laser-Welded Titanium Overdenture Bars

Journal of Prosthodontics — Wed, 12 Aug 2009 23:00:00 +0100

Conclusions: The passivity of implant overdenture bars was evaluated using total strain of the bar when tightening. Selecting a high modulus of elasticity cast alloy or use of laser-welded bar design resulted in the lowest average strain magnitudes. While the effect of screw tightening sequence was minimal, tightening the distal ends first demonstrated the lowest strain, and hence the best passivity. (Source: Journal of Prosthodontics)

Removable Partial Denture in Combination with a Milled Fixed Partial Prosthesis as Interim Restorations in Long-Term Treatment

Journal of Prosthodontics — Wed, 12 Aug 2009 23:00:00 +0100

This report describes a modified technique for construction of interim restorations with a combination of fixed and removable partial prostheses. The technique consists of the construction of a milled fixed prosthesis and removable partial denture with metallic framework for use during extensive treatment, improving masticatory function and esthetics and preserving the periodontal health of supporting structures. This interim restoration can also serve as a template for the definitive restoration, allowing patient and dentist to evaluate appearance and function and helping to ensure the success of the definitive restoration. (Source: Journal of Prosthodontics)

Tooth Reduction Guide Using Silicone Registration Material Along with Vacuum-Formed Thermoplastic Matrix

Journal of Prosthodontics — Wed, 12 Aug 2009 23:00:00 +0100

This article describes a simple and versatile technique for an accurate evaluation of tooth reduction for fixed restorations by using a color-contrasting positive guide of a silicone occlusal registration material processed inside a vacuum-formed clear thermoplastic matrix. (Source: Journal of Prosthodontics)

Aftercare of the Complete Denture Patient

Journal of Prosthodontics — Tue, 04 Aug 2009 23:00:00 +0100

This article attempts to focus on the points to be considered in the aftercare of the complete denture patient. (Source: Journal of Prosthodontics)

Effect of Surface Preparation on the Failure Load of a Highly Filled Composite Resin Bonded to a Denture Base Resin

Journal of Prosthodontics — Mon, 03 Aug 2009 23:00:00 +0100

Conclusions: Tribochemical silica coating and the application of dichloromethane after the silane coupling agent were effective surface preparations for the bonding of a highly filled gingival shade composite resin to a denture base resin, however, the bond durability of these treatments may be insufficient. (Source: Journal of Prosthodontics)

Comparison of the Marginal Fit of Pressable Ceramic to Metal Ceramic Restorations

Journal of Prosthodontics — Mon, 03 Aug 2009 23:00:00 +0100

Conclusions: The PTM group demonstrated a smaller mean marginal opening than the MCR group. The mean marginal openings of all three groups were within a clinically acceptable range. (Source: Journal of Prosthodontics)

Fracture Loads of All-Ceramic Crowns under Wet and Dry Fatigue Conditions

Journal of Prosthodontics — Mon, 03 Aug 2009 23:00:00 +0100

Conclusions: Fracture load of the three ceramic systems was found to be influenced by ceramic composition. Moreover, cement and fatigue condition influenced the fracture loads of the crown specimens evaluated in this study. (Source: Journal of Prosthodontics)

In Vitro Tensile Bond Strength of Denture Repair Acrylic Resins to Primed Base Metal Alloys Using Two Different Processing Techniques

Journal of Prosthodontics — Mon, 03 Aug 2009 23:00:00 +0100

Conclusions: Within the limitations of this study, MRB provided the highest bond strength to both Ni-Cr and Co-Cr alloys. Generally, bond strength improved significantly when specimens were primed. Pressure-pot curing, in most cases, resulted in higher bond strength than bench curing. The results of this in vitro study suggest that MRB metal primer can be used to increase bond strength of autopolymerized repair acrylic resin to base metal alloys. Curing autopolymerized acrylic under pressure potentially increases bond strength. (Source: Journal of Prosthodontics)

Photoelastic Study of the Support Structures of Distal-Extension Removable Partial Dentures

Journal of Prosthodontics — Tue, 16 Jun 2009 04:00:00 +0100

Conclusions: The long saddles and the uniformly distributed loads demonstrated better distribution of stress on support structures. (Source: Journal of Prosthodontics)

Provisional Prosthetic Management of Mobile Teeth in Conjunction with a Removable Partial Denture Using Orthodontic Wire

Journal of Prosthodontics — Mon, 15 Jun 2009 04:00:00 +0100

Precision attachment-retained removable partial dentures eliminate the use of visible clasps and improve the esthetic appearance of the smile; however, terminal abutment teeth may be subject to unfavorable stresses under function when misused. A provisional prosthetic management technique that incorporates an orthodontic wire to assist cross-arch support and stability of the periodontally weakened abutment teeth is described. This technique is simple, reversible, does not alter the esthetic appearance of the smile, and controls the mobility of the abutment teeth until a definitive treatment plan is established. (Source: Journal of Prosthodontics)

Microwave Disinfection of Complete Dentures Contaminated In Vitro with Selected Bacteria

Journal of Prosthodontics — Thu, 11 Jun 2009 04:00:00 +0100

Conclusion: Microwave irradiation for 3 minutes at 650 W produced sterilization of complete dentures contaminated with S. aureus and P. aeruginosa. Dentures contaminated with B. subtilis were disinfected by microwave irradiation after 3 and 5 minutes at 650 W. (Source: Journal of Prosthodontics)

Finite Element Stress Analysis of Diastema Closure with Ceramic Laminate Veneers

Journal of Prosthodontics — Thu, 11 Jun 2009 04:00:00 +0100

Conclusion: The extensions of PLV in diastema closure have more of an esthetic than functional consideration, but critical factors such as angulations and the loading level acting on the free extension of PLV are important. (Source: Journal of Prosthodontics)

Adhesive Bonding of Resin Composite to Various Ni-Cr Alloy Surfaces Using Different Metal Conditioners and a Surface Modification System

Journal of Prosthodontics — Thu, 11 Jun 2009 04:00:00 +0100

Conclusions: The OP and TL conditioners and surface sandblasting with 250 [mu]m Al2O3 promoted the highest SBS between resin and the Ni-Cr metal surface. (Source: Journal of Prosthodontics)

A Preliminary Survey of Impression Trays Used in the Fabrication of Fixed Indirect Restorations

Journal of Prosthodontics — Thu, 11 Jun 2009 04:00:00 +0100

Conclusions: Within the limitations of this study, dual-arch trays were the most commonly used tray. Recommendations for the use of the dual-arch tray were not followed in a substantial number of impressions examined. (Source: Journal of Prosthodontics)

Esthetic Interim Acrylic Resin Prosthesis Reinforced with Metal Casting

Journal of Prosthodontics — Thu, 11 Jun 2009 04:00:00 +0100

Fabrication of an interim prosthesis is an important procedure in oral rehabilitation because it aids in determining the esthetics, phonetics, and occlusal relationship of the definitive restoration. The typical material (acrylic resin) used in interim prostheses commonly fails due to fractures. During extended oral rehabilitation with fixed partial prostheses, high strength interim prostheses are often required to protect hard and soft tissues, avoid dental mobility, and to allow the clinician and patient a chance to evaluate cosmetics and function before the placement of the definitive prosthesis. Furthermore, a satisfactory interim prosthesis can serve as a template for the construction of the definitive prosthesis. The maintenance of this prosthesis is important during treatment for pr...

Surgical and Prosthodontic Treatment of a Patient with Significant Trauma to the Middle and Lower Face Secondary to a Gunshot Wound: A Clinical Report

Journal of Prosthodontics — Tue, 09 Jun 2009 04:00:00 +0100

This article reports on the evaluation and treatment of a patient who suffered significant trauma to the lower and mid-face secondary to a gunshot injury. It describes the initial presentation, life-saving procedures, and subsequent bone grafts, implant placement, and prosthetic treatments required to rehabilitate the patient to a condition that closely approximated his preoperative condition. This clinical report confirms that no matter the degree of complexity involved in treating the results of significant facial trauma, successful treatment is dependent on thorough physical and radiographic examinations, development of the appropriate diagnoses, and treatment based on sound prosthodontic and surgical principles. (Source: Journal of Prosthodontics)

Evaluation of the Bond Strength of Denture Base Resins to Acrylic Resin Teeth: Effect of Thermocycling

Journal of Prosthodontics — Mon, 08 Jun 2009 04:00:00 +0100

Conclusion: Some acrylic tooth/denture base resin combinations can be more affected by thermocycling; effects vary based upon the materials used. (Source: Journal of Prosthodontics)

Superficial Distribution and Identification of Antifungal/Antimicrobial Agents on a Modified Tissue Conditioner by SEM-EDS Microanalysis: A Preliminary Study

Journal of Prosthodontics — Mon, 08 Jun 2009 04:00:00 +0100

Conclusions: Within the limitations of this in vitro study, the modified tissue conditioner showed differences in the particle distribution and size of the antifungal/antimicrobial agent added to the plasticized matrix. Further studies would discriminate the most important particle features that may influence the drug leaching from the plasticized matrix. (Source: Journal of Prosthodontics)

Metal-Ceramic Interface Evaluation of a Gold-Infiltrated Alloy

Journal of Prosthodontics — Mon, 08 Jun 2009 04:00:00 +0100

Conclusions: Microscopy and XRD analysis showed that micromechanical interlocking is the primary mechanism of porcelain adherence to Captek metal. The use of Capbond prior to porcelain application to Captek results in gold nodules on the surface to aid retention. Existing metal-ceramic bond compatibility standardized tests are not sufficient for evaluating Captek, primarily due to the flexibility of the material. (Source: Journal of Prosthodontics)

Shear Bond Strength of Two Chemically Different Denture Base Polymers to Reline Materials

Journal of Prosthodontics — Mon, 08 Jun 2009 04:00:00 +0100

Conclusion: The two chemically different denture base polymers showed different shear bond strength values to corresponding reline materials. (Source: Journal of Prosthodontics)

Sealing Ability of Three Fiber Dowel Systems

Journal of Prosthodontics — Mon, 08 Jun 2009 04:00:00 +0100

Conclusion: The use of the E-glass dowels in EV did not improve the root-wall sealing ability compared with the control group PP. The system RX, which uses a new simplified self-adhesive protocol, resulted in a lower depth of silver infiltration than the control group PP. (Source: Journal of Prosthodontics)

A Laboratory Procedure for Optimal Implant Abutment Preparation

Journal of Prosthodontics — Sun, 07 Jun 2009 04:00:00 +0100

Simplicity and predictability have made cement-retained implant crowns the recent restoration of choice. The taper of the abutment is of particular importance for cement-retained implant restorations. The ideal taper of the implant abutment allows the clinician to control the overall retention of restorations. The technique described in this report presents the laboratory preparation of an implant abutment for a cement-retained crown using a counter gauge to control the preparation taper. (Source: Journal of Prosthodontics)

A Systematic Review of Dowel (Post) and Core Materials and Systems

Journal of Prosthodontics — Wed, 03 Jun 2009 04:00:00 +0100

Conclusions: According to the studies of the highest levels of evidence, carbon fiber in resin matrix dowels are significantly better than precious alloy cast dowels (RCT). Glass fiber dowels are significantly better than metal screw dowels (RCT) and moderately better than quartz fiber dowels (CCT). Carbon fiber dowels are significantly worse than metal dowels (of precious alloy) (RCT). Prefabricated metal dowels are slightly better than cast dowels (RCT), but moderately worse when no collar of the dentin above the gingiva could be achieved (CCT). (Source: Journal of Prosthodontics)

Flexural Strength of Interim Resin Materials for Fixed Prosthodontics

Journal of Prosthodontics — Wed, 03 Jun 2009 04:00:00 +0100

Conclusions: Bis-acryl interim materials exhibited higher flexural strength than the methacrylate resins tested in this study. These higher values should be considered in making interim fixed prostheses, especially when long-term use or long-span FPDs are planned. (Source: Journal of Prosthodontics)

The Change in Retentive Values of Locator Attachments and Hader Clips over Time

Journal of Prosthodontics — Wed, 03 Jun 2009 04:00:00 +0100

Conclusion: The results of this in vitro study demonstrate that retentive values of the Locator attachments are reduced significantly after multiple pulls. Although this reduction might not be noticeable to the patient, it is recommended that the clinician place and remove the overdenture multiple times before delivery. (Source: Journal of Prosthodontics)

Effects of Ethanol on the Surface and Bulk Properties of a Microwave-Processed PMMA Denture Base Resin

Journal of Prosthodontics — Wed, 03 Jun 2009 04:00:00 +0100

Conclusions: The findings of this study showed that the ethanol concentrations of tested drinks affect the physical properties of the investigated acrylic resin. An obvious plasticizing effect was found, which could lead to a lower in vivo durability associated with alcohol consumption. (Source: Journal of Prosthodontics)

Nonmetallic Prefabricated Dowels: A Review of Compositions, Properties, Laboratory, and Clinical Test Results

Journal of Prosthodontics — Sun, 10 May 2009 04:00:00 +0100

Conclusion: Since there is considerable variation in reported failure percentages, longer-term studies are needed that present data regarding all types of complications that have been identified in the literature. (Source: Journal of Prosthodontics)

A Comparison of Retention Characteristics in Prefabricated and Custom-Cast Dental Attachments

Journal of Prosthodontics — Fri, 08 May 2009 04:00:00 +0100

Conclusion: The prefabricated attachments had superior retention than the cast groups over time. Reduced dimension did not reduce the retention when compared to the cast group. (Source: Journal of Prosthodontics)

Differing Expansion Contributions of Three Investment Materials Used for Casting Titanium

Journal of Prosthodontics — Fri, 08 May 2009 04:00:00 +0100

Conclusions: The almost concurrent occurrence of high SE and high setting temperature generation in Rematitan Plus enlarged the wax pattern and effectively supplemented its low TE to produce oversized crowns. Despite this adverse effect, the correlation between TE and crown accuracy was still high. It is generally expected that the TE values given by manufacturers predict crown accuracy, when uniform TE, small SE, and minimum heat generation during setting are assured. (Source: Journal of Prosthodontics)

Effect of Two Self-Adhesive Cements on Marginal Adaptation and Strength of Esthetic Ceramic CAD/CAM Molar Crowns

Journal of Prosthodontics — Fri, 08 May 2009 04:00:00 +0100

Conclusions: Self-adhesive cement RX offers a valid alternative to multistep resin-based luting composite with respect to marginal adaptation to dentin and fracture resistance. The latter is also influenced by occlusal morphology, necessitating careful monitoring of occlusal contacts. (Source: Journal of Prosthodontics)

Flexural Strength of Glass-Infiltrated Zirconia/Alumina-Based Ceramics and Feldspathic Veneering Porcelains

Journal of Prosthodontics — Fri, 08 May 2009 04:00:00 +0100

Conclusion: In-Ceram Alumina and Zirconia were similar statistically and more resistant than VM7 and Vitadur-[alpha]. (Source: Journal of Prosthodontics)

Fatigue and Fluoride Corrosion on Streptococcus mutans Adherence to Titanium-Based Implant/Component Surfaces

Journal of Prosthodontics — Fri, 08 May 2009 04:00:00 +0100

Conclusion: The process of corrosion by fluoride ions on Cp Ti implant/component sets allowed greater S. mutans adherence than in the absence of corrosion and with the fatigue process in isolation. (Source: Journal of Prosthodontics)

Strength of Denture Base Resins Repaired with Auto- and Visible Light-Polymerized Materials

Journal of Prosthodontics — Wed, 22 Apr 2009 04:00:00 +0100

Conclusion: Denture base acrylic resins repaired with the same resin they were made of showed greater fracture strength. (Source: Journal of Prosthodontics)

Color Difference Thresholds of Maxillofacial Skin Replications

Journal of Prosthodontics — Tue, 21 Apr 2009 04:00:00 +0100

Conclusions: Within the limitations of this study, both main effects of threshold type (perceptibility and acceptability) and primary color (light and dark) on 50:50% color-difference thresholds of colored maxillofacial elastomers were found significant for both color-difference formulae used (CIELAB, CIEDE2000). In addition, significant interaction between the two main effects was found, indicating a stronger effect of skin type on acceptability than perceptibility thresholds. Primary specimen color (light vs. dark) was found to be the only significant main effect on the AUC of ROC curves constructed from logistic regression. (Source: Journal of Prosthodontics)

Effect of Incorporation of Disinfectant Solutions on Setting Time, Linear Dimensional Stability, and Detail Reproduction in Dental Stone Casts

Journal of Prosthodontics — Tue, 21 Apr 2009 04:00:00 +0100

Conclusions The addition of sodium hypochlorite in both dilutions significantly altered, negatively, all the evaluated properties. But the addition of glutaraldehyde and chlorhexidine did not promote any significant alterations in the evaluated properties. (Source: Journal of Prosthodontics)

Comparison of the Load at Fracture of Turkom-Cera to Procera AllCeram and In-Ceram All-Ceramic Restorations

Journal of Prosthodontics — Tue, 21 Apr 2009 04:00:00 +0100

Conclusion: Because Turkom-Cera demonstrated equal to or higher loads at fracture than currently accepted all-ceramic materials, it would seem to be acceptable for fabrication of anterior and posterior ceramic crowns. (Source: Journal of Prosthodontics)

Effect of Two Methods of Reinforcement on the Fracture Strength of Interim Fixed Partial Dentures

Journal of Prosthodontics — Tue, 21 Apr 2009 04:00:00 +0100

Conclusion: Initially, Duralay resin had higher fracture resistance values than Protemp II and Snap. Fiber and mesh reinforcements increased the fracture resistance of Snap. No statistically significant difference was evident among the fracture resistances of the three mesh-reinforced resin FPD restorations. The three resins had similar moduli. Fiber and mesh reinforcement increased the modulus of Duralay resin but did not change that of Protemp and Snap. Fiber and metal mesh reinforcements may alter the fracture strength and modulus of some, but not all, provisional resins. (Source: Journal of Prosthodontics)

Influence of Double Flask Investing and Microwave Heating on the Superficial Porosity, Surface Roughness, and Knoop Hardness of Acrylic Resin

Journal of Prosthodontics — Tue, 21 Apr 2009 04:00:00 +0100

Conclusion: Processing acrylic resin in a double flask heated by either warm water or microwave energy does not alter the resin's superficial porosity, surface roughness, or Knoop hardness; however, other properties of resin should be analyzed using this denture processing technique. (Source: Journal of Prosthodontics)

The Effect of Polymerization Cycles on Color Stability of Microwave-Processed Denture Base Resin

Journal of Prosthodontics — Tue, 07 Apr 2009 04:00:00 +0100

Conclusions: Color changes of the microwave-polymerized denture base resin tested were not affected by different polymerization cycles after accelerated aging or immersion in beverages. These changes were similar to the conventional heat-polymerized acrylic resin test, but lower than the repair resin after accelerated aging. (Source: Journal of Prosthodontics)

Implant–Bone Interface Stress Distribution in Immediately Loaded Implants of Different Diameters: A Three-Dimensional Finite Element Analysis

Journal of Prosthodontics — Fri, 03 Apr 2009 04:00:00 +0100

Conclusions: With an increase of implant diameter, stress and strain on the implant[ndash]bone interfaces significantly decreased, especially when the diameter increased from 3.3 to 4.1 mm. It appears that dental implants of 10 mm in length for immediate loading should be at least 4.1 mm in diameter, and uniaxial loading to dental implants should be avoided or minimized. (Source: Journal of Prosthodontics)

Bacterial Culture and DNA Checkerboard for the Detection of Internal Contamination in Dental Implants

Journal of Prosthodontics — Fri, 03 Apr 2009 04:00:00 +0100

Conclusion: The DNA Checkerboard method was shown to be more sensitive than conventional cultures in the detection of microorganisms. (Source: Journal of Prosthodontics)

Wear Testing of Composite, Gold, Porcelain, and Enamel Opposing a Removable Cobalt–Chromium Partial Denture Alloy

Journal of Prosthodontics — Fri, 03 Apr 2009 04:00:00 +0100

Conclusions: Significant differences for mean wear volume loss and maximum depth were found between composite and gold, enamel, and porcelain. Enamel proved to be wear resistant to the Co[ndash]Cr alloy. Clinical implications: porcelain and gold appear to be good options for occlusal surfaces opposing a Co[ndash]Cr alloy; however, the test composite was not found to be a recommended option. (Source: Journal of Prosthodontics)

The Prevalence of Cervical Tooth Wear in Patients with Bruxism and Other Causes of Wear

Journal of Prosthodontics — Fri, 03 Apr 2009 04:00:00 +0100

Conclusions: In this study, the likely cause of cervical tooth wear was multifactorial. (Source: Journal of Prosthodontics)

An Approach to Define Clinical Significance in Prosthodontics

Journal of Prosthodontics — Fri, 03 Apr 2009 04:00:00 +0100

Conclusion: The MID of the OHIP is an important benchmark to assess individual and group treatment effects in prosthodontics and could be used to approach what is clinically significant in terms of patient-based outcomes. (Source: Journal of Prosthodontics)

Vitamin D and Bone Physiology: Demonstration of Vitamin D Deficiency in an Implant Osseointegration Rat Model

Journal of Prosthodontics — Thu, 26 Mar 2009 04:00:00 +0100

Conclusions: The effect of vitamin D insufficiency significantly impairing the establishment of Ti6Al4V implant osseointegration in vivo was unexpectedly profound. The outcome of Ti-based endosseous implants may be confounded by the increasing prevalence of vitamin D insufficiency in our patient population. (Source: Journal of Prosthodontics)

Confocal Examination of Subsurface Cracking in Ceramic Materials

Journal of Prosthodontics — Thu, 26 Mar 2009 04:00:00 +0100

Conclusions: The ceramic materials with different microstructures showed different patterns of subsurface cracking. (Source: Journal of Prosthodontics)

Effect of Artificial Saliva Storage on Microhardness and Fracture Toughness of a Hydrothermal Glass-Ceramic

Journal of Prosthodontics — Thu, 26 Mar 2009 04:00:00 +0100

Conclusions: Surface finishing procedures and artificial saliva storage had a statistically significant effect on mean values of microhardness, crack length, and fracture toughness. This in vitro study suggests that fracture toughness of ceramics may be affected by different surface treatments such as glazing, polishing, bleaching, or a combination; however, in this study Duceram LFC proved its self-healing property after 3-week storage in artificial saliva. (Source: Journal of Prosthodontics)

Microhardness of a Resin Cement Polymerized by Light-Emitting Diode and Halogen Lights through Ceramic

Journal of Prosthodontics — Thu, 26 Mar 2009 04:00:00 +0100

Conclusions: The efficiency of high-power LED light in polymerization of the resin cement used in this study was comparable to the high-power QTH light only with a longer exposure time. A reduced curing time of 20 seconds with high-power LED light for photopolymerizing the dual-cured resin cement under ceramic restorations with a minimum 2-mm thickness is not recommended. (Source: Journal of Prosthodontics)

Effect of Three Methods for Cleaning Dentures on Biofilms Formed In Vitro on Acrylic Resin

Journal of Prosthodontics — Thu, 26 Mar 2009 04:00:00 +0100

Conclusion: The three denture hygiene methods showed different effects depending on the type of microbial biofilms formed on acrylic base resin specimens. (Source: Journal of Prosthodontics)

Use of a Magnetic Attachment to Retain an Obturator Prosthesis for an Osseous Defect

Journal of Prosthodontics — Thu, 26 Mar 2009 04:00:00 +0100

This report describes procedures for the fabrication of an osseous defect obturator prosthesis connected to a fixed partial denture by a magnetic attachment along with the clinical outcome. (Source: Journal of Prosthodontics)

A Simple and Practical Approach to Evaluate Implant Positioning Immediately after Placement

Journal of Prosthodontics — Sun, 08 Feb 2009 05:00:00 +0100

With the use of the flapless technique in the placement of one-piece implants, determination of the angulation of implant placement becomes critically important. After the implant is placed, the cast is made, sectioned, and superimposed on the radiographic template to determine the angulation. This method will assist the clinician in determining the angulation of one-piece implants immediately after placement. (Source: Journal of Prosthodontics)

Evaluation of a Computerized Method for Denture Biofilm Quantification: Inter-Examiner Reproducibility

Journal of Prosthodontics — Fri, 06 Feb 2009 05:00:00 +0100

Conclusions: The obtained results suggest that the computerized method aided by the Image Tool software (2.0) can be employed to quantify complete denture biofilm, seeing that it demonstrated inter-examiner reproducibility of the results. (Source: Journal of Prosthodontics)

Corrosion of Dental Magnet Attachments for Removable Prostheses on Teeth and Implants

Journal of Prosthodontics — Fri, 06 Feb 2009 05:00:00 +0100

Conclusion: The analysis of the corrosion behavior of modern magnetic attachments for use on teeth and dental implants according to ISO 10271:2001 showed that metal ions had dissolved on all specimens. In the case of one product, the magnet corroded. For this product, an improvement of the capsulation would be desirable. None of the products reached the limit specified in ISO 22674:2006. All products seem to be suitable for dental application. Further studies in regard to the specific biocompatibility and possible cytotoxic effects on mucosa and tissue would be desirable. (Source: Journal of Prosthodontics)

Management of Obstructive Sleep Apnea with a Mandibular and Tongue Advancement Splint (MTAS) in a Completely Edentulous Patient. A Clinical Report

Journal of Prosthodontics — Fri, 06 Feb 2009 05:00:00 +0100

Treatment of obstructive sleep apnea (OSA) in dentate patients using a mandibular advancement splint (MAS) from mandibular repositioners has been documented in detail. Nevertheless, studies about completely edentulous patients with OSA are sparse. This clinical report describes a clinical and laboratory method for producing a functional splint combining an MAS and a tongue-retaining device with an individualized tongue tip housing and discusses the rationale for using such a device. (Source: Journal of Prosthodontics)

Outcomes of Dental Implants in Osteoporotic Patients. A Literature Review

Journal of Prosthodontics — Fri, 06 Feb 2009 05:00:00 +0100

Conclusions: There are no data to contraindicate the use of dental implants in osteoporotic patients; however, a proper adjustment of the surgical technique and a longer healing period may be considered in order to achieve osseointegration. Data on the use of biphosphonates in osteoporotic patients and implant outcomes are very limited, and no conclusions can be drawn. In addition, large prospective studies investigating the long-term success of dental implants in osteoporotic individuals are required. (Source: Journal of Prosthodontics)

Influence of Different Tightening Forces Before Laser Welding to the Implant/Framework Fit

Journal of Prosthodontics — Mon, 02 Feb 2009 05:00:00 +0100

Conclusions: Under the conditions of this study, pre-welding tightness on abutment screws did not influence the vertical fit of implant-supported metal frameworks. (Source: Journal of Prosthodontics)

The Effect of a Bleaching System on Properties Related to Different Ceramic Surface Textures

Journal of Prosthodontics — Mon, 02 Feb 2009 05:00:00 +0100

Conclusions: In-office bleaching with 35% carbamide peroxide, followed by home bleaching with 15% carbamide peroxide and a fluoride gel may affect the roughness and whiteness of overglazed and polished/overglazed Duceram LFC restorations. No significant change in roughness or whiteness was detected by this bleaching system on autoglazed Ducera LFC. Ceramic restorations should be protected before any bleaching for fear of altering their roughness and whiteness. Patients should be advised that their existing porcelain restorations may not match their natural teeth after bleaching. (Source: Journal of Prosthodontics)

In Vitro Evaluation of the Effectiveness of Bleaching Agents Activated by Different Light Sources

Journal of Prosthodontics — Mon, 02 Feb 2009 05:00:00 +0100

Conclusion: The halogen lamp presented the same or higher efficacy than non-activated bleaching, which had a longer gel contact period. When hydrogen peroxide was used, a decrease in reflectance values was observed 30 days after the end of bleaching. (Source: Journal of Prosthodontics)

Effect of Flasking and Polymerization Techniques on Tooth Movement in Complete Denture Processing

Journal of Prosthodontics — Mon, 02 Feb 2009 05:00:00 +0100

Conclusions: Within the limitations of this study, it was concluded that although the differences were not statistically significant, the use of a silicone investment layer when flasking complete dentures resulted in the least positional changes of the artificial teeth regardless of the polymerization technique. (Source: Journal of Prosthodontics)

Implant-Retained Nasal Prosthesis for a Patient Following Partial Rhinectomy: A Clinical Report

Journal of Prosthodontics — Mon, 02 Feb 2009 05:00:00 +0100

Prosthetic rehabilitation of facial defects has always perplexed maxillofacial prosthodontists. Facial defects lead to functional and cosmetic deficiencies. Early rehabilitation improves patients' quality of life. Osseointegrated rehabilitation of the maxillofacial prosthetic patient presents the potential for overcoming many of the disadvantages associated with conventional retentive methods. This paper presents the clinical report of a patient who had undergone partial rhinectomy due to basal cell carcinoma. Following post-surgical healing, the patient was rehabilitated with a temporary acrylic resin nasal prosthesis retained by eyeglass frame. Later a silicone nasal prosthesis supported by an implant-retained framework was fabricated as a definitive replacement. (Source: Journal of Pros...

The Dynamic Interaction of Water with Four Dental Impression Materials During Cure

Journal of Prosthodontics — Mon, 02 Feb 2009 05:00:00 +0100

Purpose: The purpose of this work was to investigate the interaction of water with four different dental impression materials: Aquasil (Ultra XLV Type 3), Take 1 (Wash Regular Set), Genie (Light Body, Standard Set), and Impregum Garant (Soft Light Bodied Consistency). Materials and Methods: Apparent contact angles of de-ionized water made against thin horizontal sample films of the different materials under different conditions were measured from analysis of profile images of symmetrical sessile drops of water placed on the sample films using a Model FTÅ200 dynamic drop shape analysis system, which included a JAI M30 high speed CCD camera combined with a zoom microscope. Data were taken for specimens of dry ages (times following mixing) from a minimum of 20 seconds up to 1220 seconds. Ima...

Implant Treatment Record Form

Journal of Prosthodontics — Sun, 01 Feb 2009 05:00:00 +0100

The identification of different dental implants and restorative components is difficult when dental records do not include an inventory of implant components. An implant record form is described. The form should be filled out and retained in the patient's chart for future use and implant maintenance visits. (Source: Journal of Prosthodontics)

An Alternative Procedure for Fabricating a Hollow Interim Obturator for a Partial Maxillectomy Patient

Journal of Prosthodontics — Fri, 02 Jan 2009 03:45:24 +0100

A technique is described for fabricating an interim obturator for a partial maxillectomy patient. This technique enables the immediate and easy chairside fabrication of a lightweight hollow-type interim obturator when a preoperative cast is not available. After a master cast is formed, two duplicate casts are made from the master cast. One portion of the obturator is fabricated on a duplicate cast with a corrected defect, and the other portion of the prosthetic base is made on the second duplicate cast with a corrected alveolar ridge. These two portions are connected and adjusted in the patient's oral cavity. This technique is beneficial because it helps patients maintain good esthetics and their ability to speak, swallow, and chew just after surgery. (Source: Journal of Prosthodontics)

The Effect of Engaging the Screw Access Channel of an Implant Abutment with a Cement-Retained Restoration

Journal of Prosthodontics — Tue, 30 Dec 2008 05:00:00 +0100

Conclusions: The increased load required to remove a casting that extends into the screw access channel of an implant abutment may compensate for loss in retention, which occurs through unfavorable modification of the abutment. (Source: Journal of Prosthodontics)

Shade Matching Assisted by Digital Photography and Computer Software

Journal of Prosthodontics — Tue, 30 Dec 2008 05:00:00 +0100

Conclusions: Shade matching assisted by digital photographs and computer software was significantly more reliable than by conventional visual methods. (Source: Journal of Prosthodontics)

Color Stability Comparison of Silicone Facial Prostheses Following Disinfection

Journal of Prosthodontics — Tue, 30 Dec 2008 05:00:00 +0100

Conclusion: The factors of storage time and disinfection statistically influenced color stability; disinfection acts as a bleaching agent in silicone materials. (Source: Journal of Prosthodontics)

Microtensile Bond Strength and Impact Energy of Fracture of CAD-Veneered Zirconia Restorations

Journal of Prosthodontics — Tue, 30 Dec 2008 05:00:00 +0100

Conclusion: CAD veneering is a reliable method for veneering zirconia restorations. (Source: Journal of Prosthodontics)

Effects of Six Surface Treatment Methods on the Surface Roughness of a Low-Fusing and an Ultra Low-Fusing Feldspathic Ceramic Material

Journal of Prosthodontics — Tue, 30 Dec 2008 05:00:00 +0100

Conclusions: For both ceramic types, the smoothest surfaces were obtained with polishing prior to autoglazing. Diamond disc grinding prior to polishing and autoglazing (Fn-FDPA, Fn-CDPA) displayed the roughest surfaces in ultra low-fusing ceramic (Finesse). Autoglazing alone and polishing displayed the roughest surfaces in low-fusing ceramic material (Om-AUG, Om-POL). (Source: Journal of Prosthodontics)

Differential Factors That Influence Applicant Selection of a Prosthodontic Residency Program

Journal of Prosthodontics — Tue, 30 Dec 2008 04:01:09 +0100

Conclusions: Dental students consider the complexity and challenge of treatment planning and execution of prosthodontic treatment to be the most important factors in the decision to specialize in prosthodontics. Mentors and predoctoral instructors also strongly influence students. Applicants consider clinical education to be the most important determinant in program selection, but are also influenced by their impression of the program director and his/her philosophy of training. Faculty board certification and the opportunity to place dental implants are also important factors. Relationship status can significantly affect an applicant's choice of program. Teaching and research opportunities appear to be of minor importance to applicants. These findings can be used by the ACP and/or program...

Grindability of Cast Ti-6Al-4V Alloyed with Copper

Journal of Prosthodontics — Mon, 29 Dec 2008 05:00:00 +0100

Conclusions: A slight reduction in ductility due to alloying Ti-6Al-4V with copper improved the grindability of some of the resultant Ti-6Al-4V-Cu alloys. (Source: Journal of Prosthodontics)

Microtensile Bond Strength of Porcelain Laminate Veneers Bonded to Fluorosed Teeth

Journal of Prosthodontics — Mon, 29 Dec 2008 05:00:00 +0100

Conclusions: The MTBSs of ceramic cement systems used were not influenced by the moderately fluorosed teeth. (Source: Journal of Prosthodontics)

Effect of Surface Preparation on the Failure Load of a Highly Filled Composite Bonded to the Polymer-Monomer Matrix of a Fiber-Reinforced Composite

Journal of Prosthodontics — Mon, 29 Dec 2008 05:00:00 +0100

Conclusion: Within the limitations of the current in vitro study, the application and prepolymerization of a mixed dimethacrylate resin liquid prior to the application of a highly filled composite was an effective surface preparation for the polymer-monomer matrix of a fiber-reinforced composite; however, the bond durability may be insufficient. (Source: Journal of Prosthodontics)

An Alternative Section Method for Casting and Posterior Laser Welding of Metallic Frameworks for an Implant-Supported Prosthesis

Journal of Prosthodontics — Mon, 29 Dec 2008 05:00:00 +0100

Conclusions: Results of this study showed that casting diagonally sectioned frameworks lowers misfit levels of prosthetic implant-supported frameworks and also improves the levels of passivity to the same frameworks when compared to structures cast as one piece. (Source: Journal of Prosthodontics)

A General Method for Describing Sources of Variance in Clinical Trials, Especially Operator Variance, in Order to Improve Transfer of Research Knowledge to Practice

Journal of Prosthodontics — Mon, 29 Dec 2008 05:00:00 +0100

Conclusions: Operator and Treatment-by-Operator interactions appear to be significant and previously underrecognized sources of variance. It is suggested that variance estimates of factors thought to significantly influence the transfer of research findings to practice contexts and evidence of representative sampling across practice contexts be regularly included in reports of clinical trials. (Source: Journal of Prosthodontics)

Intraoral Acrylic Resin Coping Fabrication for Making Interocclusal Records

Journal of Prosthodontics — Wed, 10 Dec 2008 05:00:00 +0100

A safe and accurate method for the fabrication of acrylic resin copings to be used for interocclusal registration is described. Copings are fabricated on vital prepared teeth using visible light-cured acrylic resin, and the records are then obtained with autopolymerizing acrylic resin. This allows for an interocclusal recording to be obtained at the final impression appointment. (Source: Journal of Prosthodontics)

Dimensional Accuracy of an Epoxy Die Material Using Different Polymerization Methods

Journal of Prosthodontics — Wed, 26 Nov 2008 05:00:00 +0100

Conclusion: The epoxy resin die material tested in this research did not improve its dimensional accuracy following retarding polymerization or modifying the epoxy resin base/activator ratio. The epoxy resin material exhibited higher contraction variability across all tested groups. This shrinkage can significantly affect the dimension of the master cast. (Source: Journal of Prosthodontics)

Correlations between Color Differences Based on Three Color-Difference Formulas Using Dental Shade Guide Tabs

Journal of Prosthodontics — Mon, 24 Nov 2008 05:00:00 +0100

Conclusion:[Delta]E*ab,[Delta]E99, and [Delta]E00 can be used interchangeably for the evaluation of color difference of shade tabs. (Source: Journal of Prosthodontics)

Influence of a Fluoridated Medium with Different pHs on Commercially Pure Titanium-Based Implants

Journal of Prosthodontics — Mon, 24 Nov 2008 05:00:00 +0100

Conclusion: It was possible to conclude that both the fluoride concentration and the pH of the solutions did not exert any influence upon implant corrosion resistance. (Source: Journal of Prosthodontics)

Solutions for Severely Angulated Implants in the Mandibular Overdenture: A Clinical Report

Journal of Prosthodontics — Mon, 24 Nov 2008 05:00:00 +0100

Results of randomized clinical trials have confirmed that implant overdentures provide patients with better outcomes than do conventional complete dentures. Several designs have been introduced for the mandibular implant-retained removable prosthesis. The most commonly used prosthesis design for the mandibular overdenture is two implants in the canine areas with a stud attachment mechanism (i.e., ball attachments). This design is the least expensive, and therefore can service more patients and is now considered to be the "Standard of Care" for the mandibular edentulous patient. Proper treatment planning and execution lead to favorable implant placement and a successful prosthetic restoration and ultimately patient satisfaction; however, implant malposition may occur, which can lead to an u...

Influence of Matrix Type on Surface Roughness of Three Resins for Provisional Crowns and Fixed Partial Dentures

Journal of Prosthodontics — Mon, 24 Nov 2008 05:00:00 +0100

Conclusions: There is no universal matrix that produces the smoothest surface: this depends on the compatibility between the resin and the matrix. Protemp II Garant polymerized against Cavex CA37 matrix yields a surface that is smooth enough not to require polishing unless this surface is adjusted. (Source: Journal of Prosthodontics)

Microtensile Bond Strength of Nonmetallic Dowels Bonded to Radicular Dentin with Self-Etch Adhesives

Journal of Prosthodontics — Mon, 24 Nov 2008 05:00:00 +0100

Conclusions: everStick glass fiber dowel, bonded with either adhesive, showed the highest [mu]TBS. Microtensile bond strengths were not significantly different with cervical root dentin than with middle root dentin. (Source: Journal of Prosthodontics)

Technique for Removing Cement between a Fixed Prosthesis and Its Substructure

Journal of Prosthodontics — Mon, 24 Nov 2008 05:00:00 +0100

This article describes a technique to safely separate them from each other in order for the respective substructure to be reused in the fabrication of a newly reconstructed restoration and for the existing restoration to be reused as a provisional where appropriately indicated. (Source: Journal of Prosthodontics)

Effects of Tooth Preparation Burs and Luting Cement Types on the Marginal Fit of Extracoronal Restorations

Journal of Prosthodontics — Mon, 24 Nov 2008 05:00:00 +0100

Conclusions: Marginal fit of complete cast crowns is influenced by tooth preparation surface characteristics, regardless of the type of luting agent used for cementation. Tooth preparations refined with finishing burs may favor the placement of restorations with the smallest marginal discrepancies, regardless of the type of cement used. (Source: Journal of Prosthodontics)

Bond Strength and Degree of Infiltration between Acrylic Resin Denture Liner after Immersion in Effervescent Denture Cleanser

Journal of Prosthodontics — Wed, 22 Oct 2008 04:00:00 +0100

Conclusions: The use of sodium perborate did not promote significant alterations in the evaluated properties. Kooliner presented the best results. (Source: Journal of Prosthodontics)

Oral Cancer: A Prosthodontic Diagnosis