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A prospective, randomized-controlled clinical trial to evaluate bone preservation using implants with different geometry placed into extraction sockets in the maxillaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The primary objective of this study was to determine the association between the size of the void established by using two different implant configurations and the amount of buccal/palatal bone loss that occurred during 16 weeks of healing following their installation into extraction sockets. The clinical trial was designed as a prospective, randomized-controlled parallel-group multicenter study. Adults in need of one or more implants replacing teeth to be removed in the maxilla within the region 15[ndash]25 were recruited. Following tooth extraction, the site was randomly allocated to receive either a cylindrical (group A...
Source: Clinical Oral Implants Research - November 19, 2009 Category: Dentistry Authors: Mariano Sanz, Denis Cecchinato, Jorge Ferrus, E. Bjarni Pjetursson, Niklaus P. Lang, Jan Lindhe Source Type: journals

Effect of diabetes and metabolic control on de novo bone formation following guided bone regenerationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To evaluate histologically and morphometrically the effect of experimental diabetes and metabolic control on de novo bone formation following guided bone regeneration (GBR). Thirty-five Wistar rats were allocated in three experimental groups: (a) uncontrolled, streptozotocin-induced diabetes (D); (b) insulin-controlled diabetes (CD); (c) healthy (H). A standardised titanium microimplant with sandblasted and acid-etched surface was placed into the inferior border of the mandible bilaterally. On the test site, the microimplant was covered with a titanium reinforced expanded polytetrafluoroethylene membrane securely fixed in ...
Source: Clinical Oral Implants Research - November 18, 2009 Category: Dentistry Authors: Maria Retzepi, Mark P. Lewis, Nikolaos Donos Source Type: journals

Factors influencing ridge alterations following immediate implant placement into extraction socketsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To identify factors that may influence ridge alterations occurring at the buccal aspect of the extraction site following immediate implant placement. In 93 subjects, single-tooth implants were placed immediately into extraction sockets in the maxilla (tooth locations 15[ndash]25). A series of measurements describing the extraction site were made immediately after implant installation and at re-entry, 16 weeks later. The implant sites were stratified according to four factors: (i) implant location (anterior/posterior), (ii) cause of tooth extraction (periodontitis/non-periodontitis), (iii) thickness of the buccal bone walls...
Source: Clinical Oral Implants Research - November 14, 2009 Category: Dentistry Authors: Jorge Ferrus, Denis Cecchinato, E. Bjarni Pjetursson, Niklaus P. Lang, Mariano Sanz, Jan Lindhe Source Type: journals

Comparison of the effects of treatment of peri-implant infection in animal and human studies: systematic review and meta-analysisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The main objective of this systematic review is to compare the effects of treatment of peri-implant infection between animal and human studies. A literature search was conducted using the Medline, Cochrane Central Register of Controlled Trials, and Latin American and Caribbean Health Sciences Literature databases up to and including May 2008. In addition, bibliographies of systematic reviews on peri-implant diseases were searched manually. Non-surgical and surgical treatments of peri-implantitis/mucositis in animal models or human studies were compared. Meta-analysis was conducted to investigate the difference between the ...
Source: Clinical Oral Implants Research - November 13, 2009 Category: Dentistry Authors: Clovis Mariano Faggion Jr, Leandro Chambrone, Valéria Gondim, Marc Schmitter, Yu-Kang Tu Source Type: journals

Efficacy of a bioactive glass–ceramic (Biosilicate®) in the maintenance of alveolar ridges and in osseointegration of titanium implantsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aims of this research were to evaluate the efficacy of a bioactive glass[ndash]ceramic (Biosilicate®) and a bioactive glass (Biogran®) placed in dental sockets in the maintenance of alveolar ridge and in the osseointegration of Ti implants. Six dogs had their low premolars extracted and the sockets were implanted with Biosilicate®, Biogran® particles, or left untreated. After the extractions, measurements of width and height on the alveolar ridge were taken. After 12 weeks a new surgery was performed to take the final ridge measurements and to insert bilaterally three Ti implants in biomaterial-implanted and contro...
Source: Clinical Oral Implants Research - November 13, 2009 Category: Dentistry Authors: Virgílio M. Roriz, Adalberto L. Rosa, Oscar Peitl, Edgar D. Zanotto, Heitor Panzeri, Paulo T. de Oliveira Source Type: journals

Porous titanium granules promote bone healing and growth in rabbit tibia peri-implant osseous defectsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to investigate the osteoconductive properties and biological performance of porous titanium granules used in osseous defects adjacent to titanium implants. In this animal experimental study, calibrated defects were prepared in the tibias of 24 New Zealand rabbits. The defects were randomized into two tests and one control group. The test defects were grafted with either metallic or oxidized porous titanium granules (PTG or WPTG, respectively), whereas control defects were left empty (sham). The defects were closed with a submerged coin shaped titanium implant. Defects were left for healing for 4 w...
Source: Clinical Oral Implants Research - November 13, 2009 Category: Dentistry Authors: Johan Caspar Wohlfahrt, Marta Monjo, Hans Jacob Rønold, Anne Merete Aass, Jan Eirik Ellingsen, Staale Petter Lyngstadaas Source Type: journals

In vivo and in vitro biofilm formation on two different titanium implant surfacesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of the present in vitro and human in vivo study was twofold: first, to evaluate the initial biofilm formation on different titanium implant surfaces by means of two highly sensitive fluorescent techniques and, second, to correlate these findings to different surface properties. In vivo biofilm formation was induced on purely machined (Pt) and on sand-blasted and acid-etched titanium (Prom) specimens, which were mounted buccally on individual splints and worn by six study participants for 12 h. In vitro bacterial adhesion was also investigated after incubation with Streptococcus sanguinis suspension (37°C, 2 h). Ad...
Source: Clinical Oral Implants Research - November 13, 2009 Category: Dentistry Authors: Ralf Bürgers, Till Gerlach, Sebastian Hahnel, Frank Schwarz, Gerhard Handel, Martin Gosau Source Type: journals

On cone-beam computed tomography artifacts induced by titanium implantsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To briefly review the mathematical background of beam-hardening artifacts in cone-beam computed tomography (CBCT)-reconstruction and to investigate geometrical properties relevant for these reconstruction errors. By means of simulated and experimental results, beam-hardening effects caused by titanium implants are evaluated. The geometrical and physical properties of the acquisition process of the projections used for 3D reconstruction are investigated and their effects on the CBCT images in the presence of titanium implants are derived. Beam-hardening effects are computed for a simplified polychromatic situation (three en...
Source: Clinical Oral Implants Research - October 21, 2009 Category: Dentistry Authors: Ralf Kurt Willy Schulze, Dorothea Berndt, Bernd d'Hoedt Source Type: journals

Functional aspects of treatment with implant-supported single crowns: a quality control study in subjects with tooth agenesisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No comprehensive patient-centered and clinical evaluations of the functional effect of treatment with implant-supported single crowns (ISSC) have been reported previously. To investigate whether and how treatment with ISSC affects masticatory function and Oral Health-Related Quality of Life (OHRQoL) in subjects with tooth agenesis. In nine females and nine males (32±10 years) with agenesis treated with one to four ISSC (68% in the premolar region), the treatment effect and masticatory function were assessed. The evaluation was performed first after implant placement shortly before crown cementation, and again 1 month afte...
Source: Clinical Oral Implants Research - October 20, 2009 Category: Dentistry Authors: Kenichi Goshima, Michala O. Lexner, Carsten Eckhart Thomsen, Hiroyuki Miura, Klaus Gotfredsen, Merete Bakke Source Type: journals

Histomorphometric comparison of maxillary pristine bone and composite bone graft biopsies obtained after sinus augmentationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Sinus grafting is a technique oriented to facilitate implant placement in posterior atrophic maxillae. Several modifications of the original technique and a wide variety of materials have been proposed; most of them associated with implant survival rates. However, the quality of the bone obtained after the application of certain grafting materials has not been fully elucidated yet. The aims of this multicenter study were to analyse histomorphometrical samples obtained 6 months after sinus grafting using a composite graft consisting of anorganic bovine bone (ABB)+ autologous bone (AB), and to compare these samples with maxi...
Source: Clinical Oral Implants Research - October 20, 2009 Category: Dentistry Authors: Pablo Galindo-Moreno, Ildefonso Moreno-Riestra, Gustavo Ávila, Juan Emilio Fernández-Barbero, Francisco Mesa, Mariano Aguilar, Hom-Lay Wang, Francisco O'Valle Source Type: journals

Bisphosphonate-related osteonecrosis of the jaw around dental implants in the maxilla: report of a caseEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We describe a patient who developed bisphosphonate (BP)-related osteonecrosis of the jaw (ONJ) around implants in the upper molar area. The patient was a 54-year-old woman with ulceration of the gum, bone exposure, and severe spontaneous pain around implants in the upper left molar area. She had received BPs intravenously for 2 years to treat bone metastases of breast cancer. She was diagnosed with BP-related ONJ. Sequestrum including implants was resected, and hyperbaric oxygen therapy was performed. Undecalcified ground sections were prepared from the resected bone around the implants and stained with toluidine blue. For...
Source: Clinical Oral Implants Research - September 30, 2009 Category: Dentistry Authors: Tatsuo Shirota, Atsushi Nakamura, Yoshiro Matsui, Masahi Hatori, Masanori Nakamura, Satoru Shintani Source Type: journals

Clinical and radiographic study of implant treatment outcome in periodontally susceptible and non-susceptible patients: a prospective long-term studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To evaluate the implant survival rate, periodontal and radiographic parameters of non-submerged screw implants with two different surfaces (TPS and SLA) in periodontally non-susceptible patients (NSP) and in patients with chronic adult periodontitis (CAP) or with generalized aggressive periodontitis (GAP). In 110 healthy partially edentulous subjects, 68 patients with CAP and 16 patients with GAP, a total of 513 implants were installed and followed for on average 48.1±25.9 months. Only fixed partial dentures were used as suprastructures. All patients were offered a supportive periodontal maintenance program. Smoking habit...
Source: Clinical Oral Implants Research - September 29, 2009 Category: Dentistry Authors: Annemarie L. De Boever, Marc Quirynen, Wim Coucke, Guy Theuniers, Jan A. De Boever Source Type: journals

Survival and failure rates of orthodontic temporary anchorage devices: a systematic reviewEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The purpose of this study was to systematically review the literature on the survival rates of palatal implants, Onplants®, miniplates and mini screws. An electronic MEDLINE search supplemented by manual searching was conducted to identify randomized clinical trials, prospective and retrospective cohort studies on palatal implants, Onplants®, miniplates and miniscrews with a mean follow-up time of at least 12 weeks and of at least 10 units per modality having been examined clinically at a follow-up visit. Assessment of studies and data abstraction was performed independently by two reviewers. Reported failures of used de...
Source: Clinical Oral Implants Research - September 29, 2009 Category: Dentistry Authors: Marc Schätzle, Roland Männchen, Marcel Zwahlen, Niklaus P. Lang Source Type: journals

Is the osseointegration of immediately and delayed loaded implants the same?—comparison of the implant stability during a 3-month healing period in a prospective studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objectives of the present study were (1) to compare the stability of delayed loaded (DL) and immediately loaded (IL) ITI SLA implants during the first 3 months of the healing period using resonance frequency analysis (RFA) and (2) to determine the factors that affect implant stability during the healing period. To compare implant stability, RFA was performed on two groups of patients (12 patients received 25 IL implants and 47 patients received 79 DL implants) with a total 104 ITI SLA implants. Implant stability was measured directly by RFA at implant placement and consecutively once a week for 12 weeks. Statistical an...
Source: Clinical Oral Implants Research - September 29, 2009 Category: Dentistry Authors: Wei Zhou, Chun Han, Li Yunming, Dehua Li, Yingliang Song, Yimin Zhao Source Type: journals

Dimensional ridge alterations following immediate implant placement in molar extraction sites: a six-month prospective cohort study with surgical re-entryEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To assess dimensional ridge alterations following immediate implant placement in molar extraction sites. Twelve subjects received 12 immediate transmucosal implants in molar extraction sites. Peri-implant defects were treated according to the principles of Guided Bone Regeneration by means of a deproteinized bone substitute and a bioresorbable collagen membrane. Changes in vertical (IS-BD, CREST-BD) and horizontal distances (EC-I, IC-I) of alveolar bony walls to the bottom of the defects (BD) and to the implant surfaces (I) were compared between implant placement and surgical re-entry at 6 months. The implant survival rate...
Source: Clinical Oral Implants Research - August 30, 2009 Category: Dentistry Authors: S. Matarasso, G. E. Salvi, V. Iorio Siciliano, C. Cafiero, A. Blasi, N. P. Lang Source Type: journals

Clinical outcome of submerged vs. non-submerged implants placed in fresh extraction socketsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to compare the clinical outcome of submerged vs. non-submerged tapered implants placed into fresh extraction sockets. A prospective, controlled, multicenter, randomized, clinical trial has been performed in two centers in Rome and Torino (Italy). Thirty healthy patients were recruited according to the following inclusion criteria: need for an immediate post extraction implant, ages between 18 and 70, horizontal defect depth (Source: Clinical Oral Implants Research)
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Luca Cordaro, Ferruccio Torsello, Mario Roccuzzo Source Type: journals

Inferior alveolar canal course: a radiographic studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To describe the morphology and course of the inferior alveolar canal (IAC) as it appears in digital panoramic radiographs. Three hundred and eighty-six digital rotational panoramic radiographs (OPG) were studied using the Clinview Software (6.1.3.7 version, Instrumentarium). Among the 386 radiographs, 86 radiographs with 5-mm steel balls were used to calculate the magnification. The average magnification of radiographs in this study was 7.24±7.55%. The course of IAC as seen in the panoramic radiograph may be classified into four types: (1) linear curve, 12.75%, (2) spoon-shaped curve, 29.25%, (3) elliptic-arc curve, 48.5%...
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Tie Liu, Bing Xia, Zhiyuan Gu Source Type: journals

Bio-degradation of a resorbable collagen membrane (Bio-Gide®) applied in a double-layer technique in ratsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to evaluate histologically the bio-degradation of two layers of Bio-Gide® (BG) membrane, as compared with that of a single layer. Two circular calvarial bony defects, 5 mm in diameter, were made in 24 Wistar rats. BG membrane, labeled with biotin, was cut into 5-mm-diameter disks, and placed in defects either as a mono-layer membrane (MLM) or as a double-layer membrane (DLM). Rats were sacrificed after 4 or 9 weeks and histology was performed. Membranes were stained with horseradish peroxidase-conjugated streptavidin and aminoethyl carbazole as a substrate for detection of biotinylated collagen. ...
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Avital Kozlovsky, Guy Aboodi, Ofer Moses, Haim Tal, Zvi Artzi, Miron Weinreb, Carlos E. Nemcovsky Source Type: journals

Patient-centered outcome of immediately loaded implants in the rehabilitation of fully edentulous jawsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Edentulism often involves functional, esthetic, phonetic and psychological problems. To evaluate patient-centered outcomes of full-arch screw-retained rehabilitation on immediately loaded implants. Fifty patients treated with Astra Tech[trade] implants answered self-administered questionnaires on a visual analogue scale (VAS) 100 mm scale or with multiple-choice or open questions: at baseline, 1 week, 3 or 6 months and 1 year. Changes of VAS in time were analyzed using mixed models for repeated measures, adjusting for gender, age and jaw; comparison of cross-sectional parameters between jaws was performed with the Mann[nda...
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Dierens Melissa, Collaert Bruno, Deschepper Ellen, Browaeys Hilde, Klinge Björn, De Bruyn Hugo Source Type: journals

Effect of recombinant human bone morphogenetic protein-2 on bone formation in the acute distraction osteogenesis of rat mandiblesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Distraction osteogenesis (DO) is a method of producing new bone directly from the osteotomy site by gradual traction of the divided bone fragments. The purpose of the present study was to evaluate histomorphometrically whether acute DO would constitute a viable alternative to the conventional continuous distraction treatment and also to verify the capacity of a recombinant human BMP (rhBMP-2) associated with monoolein gel to stimulate bone formation in the acute distraction process. Forty-eight Wistar rats were assigned to three groups: Group 1, treated at a conventional continuous distraction rate (0.5 mm/day), Group 2, t...
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: João Paulo Mardegan Issa, Cássio do Nascimento, Teresa Lamano, Mamie Mizusaki Iyomasa, Walter Sebald, Rubens Ferreira de Albuquerque Jr Source Type: journals

Microflora associated with successful and failed orthodontic mini-implantsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Mini-implants are used for orthodontic bone anchorage. The reasons for a potential instability or loss of the mini-implants during treatment are multiple. Among other factors, colonization of implants with pathogenic bacteria is discussed. Therefore, the microflora associated with successful and failed mini-implants has been screened. A total of 76 mini-implants collected from 25 patients were observed during regular orthodontic treatment. Bacterial samples of eight failed and [ndash] exemplarily [ndash] four successful (control) cases were subjected to a universal Bacteria-directed real-time quantitative polymerase chain ...
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Stephanie Apel, Christian Apel, Camillo Morea, André Tortamano, Gladys Cristina Dominguez, Georg Conrads Source Type: journals

Resonance frequency measurements in vivo and related surface properties of magnesium-incorporated, micropatterned and magnesium-incorporated TiUnite®, Osseotite®, SLA® and TiOblast® implantsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To investigate implant stability using resonance frequency measurements of topographically changed and/or surface chemistry-modified implants in rabbit bone. Six groups of microstructured, screw-shaped titanium implants: two oxidized, cation-incorporated experimental implants [Mg implants and MgMp implants with micropatterned thread flanges (80[ndash]150 [mu]m wide and 60[ndash]70 [mu]m deep)] and four commercially available clinical implants (TiUnite®, Osseotite®, SLA®, and TiOblast®) were installed in 10 rabbit tibia for 6 weeks. The surface properties of the implants were characterized in detail using several analyt...
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Young-Taeg Sul, Jörgen Jönsson, Goui-Seong Yoon, Carina Johansson Source Type: journals

Five-year evaluation of the influence of keratinized mucosa on peri-implant soft-tissue health and stability around implants supporting full-arch mandibular fixed prosthesesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The question of the importance of keratinized mucosa around dental implants for the prevention of peri-implant disease could not be answered in the relevant literature so far. To investigate the influence of peri-implant keratinized mucosa on long-term peri-implant soft-tissue health and stability over a period of 5 years. A total of 386 mandibular dental implants were placed in 73 completely edentulous patients, and subsequently restored with fixed full-arch prostheses. At prosthesis delivery (baseline) and after 3, 6, 12, 18, 24, 36, 48 and 60 months, modified plaque index (mPlI), modified sulcus bleeding index (mBI), di...
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Alexander René Schrott, Monik Jimenez, Jae-Woong Hwang, Joseph Fiorellini, Hans-Peter Weber Source Type: journals

Guided bone regeneration using rhGDF-5- and rhBMP-2-coated natural bone mineral in rat calvarial defectsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of the present study was to assess the influence of either recombinant human growth and differentiation factor 5 (rhGDF-5)- or recombinant human bone morphogenetic protein 2 (rhBMP-2)-coated natural bone mineral (NBM) on guided bone regeneration in a rat calvarial defect model. Two monocortical critical-size calvarial defects (diameter 6 mm, depth 1.5 mm) were prepared in a total of 90 rats each (n=180 defects) and randomly allocated to the following groups: (1) NBM+collagen membrane (BG), (2) rhBMP-2+NBM+BG, (3) rhGDF-5+NBM+BG, (4) autogenous bone (AB)+BG, or (5) untreated control (C). At 1, 2, 4, 8, 16, and 24 we...
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Frank Schwarz, Daniel Ferrari, Martin Sager, Monika Herten, Brigitte Hartig, Jürgen Becker Source Type: journals

Bone augmentation ability of autogenous bone graft particles with different sizes: a histological and micro-computed tomography studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The purpose of this study was to investigate the augmentation process and ability of autogenous bone graft particles of two different sizes in a vertical augmentation chamber. The cranial bones of 24 rabbits were used. Two polytetrafluoroethylene chambers were filled with harvested bone from tibia with small bone (SB; 150[ndash]400 [mu]m) and large bone (LB; 1.0[ndash]2.0 mm) of the same weight. Animals were sacrificed after 1, 2, 4 and 8 weeks. The samples were analyzed by micro-computed tomography (micro-CT) for quantitative analysis, and embedded in polyester resin as non-decalcified specimens for histological analysis....
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Kazuhiro Kon, Makoto Shiota, Maho Ozeki, Yasuo Yamashita, Shohei Kasugai Source Type: journals

A retrospective analysis of maxillary sinus septa on reformatted computerised tomography scansEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study analysed 200 consecutive computerised tomography (CT) scans, reformatted with specialised software for the identification of maxillary sinus septa. All patients were routine implant patients who had undergone CT scans for dental implant planning. The data of two hundred consecutive patients (400 maxillary sinuses) who had been sent for CT scan, were reformatted with CT software. The group consisted of 115 edentulous and 85 dentate (below sinuses) patients. Septa were identified using three-dimensional (3D) reconstruction and panoramic views. No septa were included unless they were clearly visible on the 3D recon...
Source: Clinical Oral Implants Research - August 29, 2009 Category: Dentistry Authors: Andre W. van Zyl, Willie F. P. van Heerden Source Type: journals

Comparison of interproximal soft tissue height for single implants and contra-lateral natural teethEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To compare the interproximal soft tissue dimensions adjacent to single implant restorations in the premolar[ndash]molar position with those adjacent to the contra-lateral natural teeth. Twenty-five patients with a single-tooth implant in premolar[ndash]molar position and healthy contra-lateral teeth were enrolled in this retrospective cross-sectional study. The reason for the extraction was periodontitis. Radiographs were used to measure the shortest distance from the tip of the papilla to the crestal bone in single implants and contra-lateral teeth. A Wilcoxon's signed-ranks test was used to examine the differences betwee...
Source: Clinical Oral Implants Research - August 25, 2009 Category: Dentistry Authors: Dong-Won Lee, Jong-Ki Huh, Kwang-Ho Park, Jung-Kiu Chai, Chong-Kwan Kim, Ik-Sang Moon Source Type: journals

Implant-supported fixed cantilever prosthesis in partially edentulous jaws: a cohort prospective studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Reconstructive procedures present a higher rate of biological costs due to the necessity of bone harvest and grafts, use of semipermeable barriers etc. On the hand, implant supported cantilever prostheses could allow a simpler rehabilitation procedure. The aim of the present study was to assess the clinical outcome of patients treated with implant-supported fixed partial dentures (FPD) with cantilever after a mean follow-up time of 8 years. The study included 45 consecutive partially edentulous patients treated between January 1994 and August 2006 with 59 partial cantilever fixed prostheses supported by 116 ITI® implants....
Source: Clinical Oral Implants Research - August 25, 2009 Category: Dentistry Authors: Eugenio Romeo, Cristiano Tomasi, Igor Finini, Paolo Casentini, Diego Lops Source Type: journals

Influence of repeated screw tightening on bacterial leakage along the implant–abutment interfaceEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Bacterial penetration along the implant[ndash]abutment interface as a consequence of abutment screw loosening has been reported in a number of recent studies. The aim of this in vitro study was to investigate the influence of repeated tightening of the abutment screw on leakage of Streptococcus mutans along the interface between implants and pre-machined abutments. Twenty pre-machined abutments with a plastic sleeve were used. The abutment screws were tightened to 32 N cm in group 1 (n=10 [ndash] control) and to 32 N cm, loosened and re-tightened with the same torque twice in group 2 (n=10). The assemblies were completely ...
Source: Clinical Oral Implants Research - August 25, 2009 Category: Dentistry Authors: Cássio do Nascimento, Vinícius Pedrazzi, Paola Kirsten Miani, Larissa Daher Moreira, Rubens Ferreira de Albuquerque Junior Source Type: journals

Endodontic treatment of teeth induces retrograde peri-implantitisEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Some cases of retrograde peri-implantitis arise from adjacent natural teeth that have peri-radicular infection. The present study was designed to investigate the incidence of retrograde peri-implantitis from adjacent teeth with endodontic treatment. One hundred and twenty-eight patients of ages ranging from of 24[ndash]61 years were recruited for this study. A total of 128 ITI SLA implants with adjacent teeth that had received endodontic treatment at least 1 week before were placed in 128 patients. The date of endodontic therapy and the pulp status of the adjacent tooth before endodontic therapy were recorded. The distance...
Source: Clinical Oral Implants Research - August 24, 2009 Category: Dentistry Authors: Wei Zhou, Chun Han, Dehua Li, Yunming Li, Yingliang Song, Yimin Zhao Source Type: journals

Maxillary sinus floor elevation using a tissue-engineered bone complex with β-TCP and BMP-2 gene-modified bMSCs in rabbitsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To study the effects of maxillary sinus floor elevation by a tissue-engineered bone complex with [beta] tricalcium phosphate ([beta]-TCP) and bone morphogenetic protein-2 (BMP-2) gene-modified bone marrow stromal cells (bMSCs) in rabbits. bMSCs derived from New Zealand rabbit bone marrow were cultured and transduced with the adenovirus with BMP-2 (AdBMP-2), adenovirus with enhanced green fluorescent protein gene (AdEGFP) in vitro. Gene transfer efficiency was detected by EGFP expression. These gene-modified autologous bMSCs were then combined with a [beta]-TCP granule scaffold at a concentration of 2 × 107 cells/ml and us...
Source: Clinical Oral Implants Research - August 24, 2009 Category: Dentistry Authors: X.-Q. Jiang, X.-J. Sun, H.-C. Lai, J. Zhao, S.-Y. Wang, Z.-Y. Zhang Source Type: journals

Effect of surface topography of screw-shaped titanium implants in humans on clinical and radiographic parameters: a 12-year prospective studyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Although implants with a roughened surface are widely used today, little is known about the long-term effect of a roughened surface compared with the conventional machined surface on clinical and radiographic parameters. The purpose of this study is to investigate the long-term differences between moderately rough (tioblasted) titanium implants and minimally rough machined/turned surfaces with respect to marginal bone resorption and the peri-implant soft tissues in the same patient. In 20 fully edentulous patients, with severely resorbed mandibles, a total of 80 Astra Tech dental implants were placed in the mandible to sup...
Source: Clinical Oral Implants Research - August 24, 2009 Category: Dentistry Authors: Melle G. Vroom, Paul Sipos, Gert L. de Lange, Lodewijk J. M. M. Gründemann, Mark F. Timmerman, Bruno G. Loos, Ubele van der Velden Source Type: journals

Response of osteoblast-like SAOS-2 cells to zirconia ceramics with different surface topographiesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study compares the effect of (i) zirconia to the widely used titanium and (ii) zirconia with two different surface topographies (sandblasted and sandblasted/etched) on the adhesion, proliferation and differentiation of SAOS-2 osteoblasts. SAOS-2 cells were cultured on either sandblasted or sandblasted/etched zirconia and compared with sandblasted/etched titanium. 2 and 24 h after plating, cell morphology was investigated by scanning electron microscope (SEM) and fluorescence imaging. At 24 and 48 h, cell number-relevant parameters were determined. Alkaline phosphatase (ALP) activity and mineral accumulation were measu...
Source: Clinical Oral Implants Research - August 24, 2009 Category: Dentistry Authors: Ute Hempel, Thomas Hefti, Marie Kalbacova, Cornelia Wolf-Brandstetter, Peter Dieter, Falko Schlottig Source Type: journals

The effect of thread pattern upon implant osseointegrationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Implant design features such as macro- and micro-design may influence overall implant success. Limited information is currently available. Therefore, it is the purpose of this paper to examine these factors such as thread pitch, thread geometry, helix angle, thread depth and width as well as implant crestal module may affect implant stability. A literature search was conducted using MEDLINE to identify studies, from simulated laboratory models, animal, to human, related to this topic using the keywords of implant thread, implant macrodesign, thread pitch, thread geometry, helix angle, thread depth, thread width and implant...
Source: Clinical Oral Implants Research - August 24, 2009 Category: Dentistry Authors: Heba Abuhussein, Giorgio Pagni, Alberto Rebaudi, Hom-Lay Wang Source Type: journals

In vitro reaction of human osteoblasts on alumina-toughened zirconiaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this study, we examined the osteoblast response to alumina-toughened zirconia (ATZ) with different surface topographies. Human osteoblasts isolated from maxillary biopsies of four patients were cultured and seeded onto disks of the following substrates: ATZ with a machined surface, airborne-particle abraded ATZ, airborne-particle abraded and acid etched ATZ. Airborne-particle abraded and acid etched titanium (SLA) and polystyrene disks served as a reference control. The surface topography of the various substrates was characterized by profilometry (Ra, Rp[minus]v) and scanning electron microscopy (SEM). Cell proliferati...
Source: Clinical Oral Implants Research - August 3, 2009 Category: Dentistry Authors: Ralf J. Kohal, Maria Baechle, Jung S. Han, Dennis Hueren, Ute Huebner, Frank Butz Source Type: journals

Comparison of two bone substitute biomaterials consisting of a mixture of fibrin sealant (Tisseel®) and MBCP™ (TricOs®) with an autograft in sinus lift surgery in sheepEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study shows that following sinus lift augmentation in sheep, MBCP[trade]/fibrin grafts support new bone formation that is comparable to autografts, while providing better support for the dental implants. To cite this article:Saffarzadeh A, Gauthier O, Bilban M, Bagot D'Arc M, Daculsi G. Comparison of two bone substitute biomaterials consisting of a mixture of fibrin sealant (Tisseel®) and MBCP[trade] (TricOs®) with an autograft in sinus lift surgery in sheep.Clin. Oral Impl. Res. xx, 2009; 000[ndash]000. (Source: Clinical Oral Implants Research)
Source: Clinical Oral Implants Research - August 3, 2009 Category: Dentistry Authors: Afchine Saffarzadeh, Olivier Gauthier, Melitta Bilban, Maurice Bagot D'Arc, Guy Daculsi Source Type: journals

An in vitro study of non-axial forces upon the retention of an O-ring attachmentEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The purpose of this study was to evaluate the retention force of an O-ring attachment system in different inclinations to the ideal path of insertion, using devices to compensate angulations. Two implants were inserted into an aluminum base, and ball attachments were screwed to implants. Cylinders with O-rings were placed on ball attachments and connected to the test device using positioners to compensate implant angulations (0°, 7°, and 14°). Plexiglass bases were used to simulate implant angulations. The base and the test device were positioned in a testing apparatus, which simulated insertion/removal of an overdentur...
Source: Clinical Oral Implants Research - August 3, 2009 Category: Dentistry Authors: Renata Cristina Silveira Rodrigues, Adriana Cláudia Lapria Faria, Ana Paula Macedo, Ivete Aparecida de Mattias Sartori, Maria da Gloria Chiarello de Mattos, Ricardo Faria Ribeiro Source Type: journals

Vertical ridge augmentation of the atrophic posterior mandible with interpositional bloc grafts: bone from the iliac crest vs. bovine anorganic bone. Clinical and histological results up to one year after loading from a randomized-controlled clinical trialEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To compare two different techniques for vertical bone augmentation of the posterior mandible: bone blocs from the iliac crest vs. anorganic bovine bone blocs used as inlays. Ten partially edentulous patients having 5[ndash]7 mm of residual crestal height above the mandibular canal had their posterior mandibles randomly allocated to both interventions. After 4 months implants were inserted, and after 4 months, provisional prostheses were placed. Definitive prostheses were delivered after 4 months. Histomorphometry of samples trephined at implant placement, prosthesis and implant failures, any complication after loading and ...
Source: Clinical Oral Implants Research - August 3, 2009 Category: Dentistry Authors: Pietro Felice, Claudio Marchetti, Giovanna Iezzi, Adriano Piattelli, Helen Worthington, Gerardo Pellegrino, Marco Esposito Source Type: journals

Interproximal tissue dimensions in relation to adjacent implants in the anterior maxilla: clinical observations and patient aesthetic evaluationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This clinical study aimed to assess (i) interproximal tissue dimensions between adjacent implants in the anterior maxilla, (ii) factors that may influence interimplant papilla dimensions, and (iii) patient aesthetic satisfaction. Fifteen adults, who had two or more adjacent implants (total of 35) in the anterior maxilla, participated in the study. The study design involved data collection from treatment records, clinical and radiographic assessment, and a questionnaire evaluating aesthetic satisfaction. The median vertical dimension of interimplant papillae, i.e., distance from tip of the papilla to the bone crest, was 4.2...
Source: Clinical Oral Implants Research - August 3, 2009 Category: Dentistry Authors: Styliani Kourkouta, Konstantina Dina Dedi, David W. Paquette, André Mol Source Type: journals

Paste-like inorganic bone matrix: preclinical testing of a prototype preparation in the porcine calvariaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To evaluate the osteoconductive properties and the volume stability of an injectable paste-like inorganic bone matrix (PBM) in porcine calvaria defects. We created six circumferential defects in the calvaria of 12 adult iberico pigs. The defects were filled with either PBM, Bio-Oss® of different particle size, carrier alone, or left empty. PBM was composed of Bio-Oss® with a particle size ranging from 250 to 500 [mu]m and a hydrogel-carrier of carboxymethylcellulose and collagen. After 6 and 12 weeks of healing, the animals were sacrificed and undecalcified ground sections were prepared and subjected to histologic and hi...
Source: Clinical Oral Implants Research - July 19, 2009 Category: Dentistry Authors: Dieter Busenlechner, Stefan Tangl, Christine Fitzl, Thomas Bernhart, Reinhard Gruber, Georg Watzek Source Type: journals

Implant stability and bone density: assessment of correlation in fresh cadavers using conventional and osteotome implant socketsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To compare the primary stability of implants placed in conventional and osteotome sites and to evaluate the level of correlation between cutting torque measurements, resonance frequency analysis (RFA), and bone density. Eight human femoral heads were scanned with computed tomography for bone density measurements as Hounsfield units (HU), and individualized computed tomography-based surgical stents were prepared for placement of implants. Five implant sockets were prepared in each collum (CoF), caput (CaF), and trochanter (Tr-MM) section of the femoral heads using the conventional drilling technique or by a combination of d...
Source: Clinical Oral Implants Research - July 19, 2009 Category: Dentistry Authors: Murat Cavit Çehreli, Ali Murat Kökat, Ayhan Comert, Murat Akkocaoğlu, Ibrahim Tekdemir, K[iota]vanç Akça Source Type: journals

Peri-implant parameters in head and neck reconstruction: influence of extraoral skin or intraoral mucosaEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study is designed to assess dental implants supporting overdentures in edentulous patients with operated head and neck malignancies using parameters to detect peri-implant disease. Thirty-four implants supporting overdentures in 34 oral cancer patients were examined. Clinical parameters [plaque index, probing depth, bleeding on probing (BOP), origin of peri-implant soft tissue, and amount of irradiation] were recorded, and microbiological identification of periodontal pathogens was carried out by DNA[ndash]DNA hybridization. To identify yeast species, the samples were cultivated on Sabouraud agar plates and subsequent...
Source: Clinical Oral Implants Research - July 19, 2009 Category: Dentistry Authors: Yong-Dae Kwon, Julia Karbach, Wilfried Wagner, Bilal Al-Nawas Source Type: journals

Accuracy of a newly developed integrated system for dental implant planningEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
To evaluate the accuracy of the first integrated system for cone-beam CT (CBCT) imaging, dental implant planning and surgical template-aided implant placement. On the basis of CBCT scans, a total of 54 implant positions were planned for 10 partially edentulous anatomical patient-equivalent models. Surgical guides were ordered from the manufacturer (SICAT). Two different types of guidance were assessed: for assessment of the SICAT system inherent accuracy vendor's titanium sleeves of 2 mm internal diameter and 5 mm length were utilized for pilot drills. The guide sleeves of the NobelGuide system were implemented for fully g...
Source: Clinical Oral Implants Research - July 19, 2009 Category: Dentistry Authors: Timo Dreiseidler, Jörg Neugebauer, Lutz Ritter, Thea Lingohr, Daniel Rothamel, Robert A. Mischkowski, Joachim E. Zöller Source Type: journals

Rotational movements of mandibular two-implant overdenturesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Clinicians have reported that their patients complain that their mandibular two-implant overdentures (IOD) rotate. Therefore, we studied the frequency and severity of rotation of IODs with two-ball attachments, how rotation may influence perceived satisfaction ratings of chewing ability, and the factors that are involved in the rotation of IODs. Seventy-nine participants were recruited and asked to rate their general satisfaction of their IODs, as well as their ability to chew foods, the existence of any mandibular denture rotation, and to what degree denture rotation bothered them. Data on participant sociodemographic, an...
Source: Clinical Oral Implants Research - June 15, 2009 Category: Dentistry Authors: Suguru Kimoto, Shaoxia Pan, Nicolas Drolet, Jocelyne S. Feine Source Type: journals

The effect of microrough surface treatment on miniscrews used as orthodontic anchorsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The aim of this study was to investigate the effects of two different microrough surface treatments on miniscrews with loading over different time periods in vivo. Twenty-four New Zealand white rabbits were selected. One hundred and forty-four miniscrews with a machined (MA), sandblasted and acid-etched (SLA) or sandblasted and alkaline-etched (SL/NaOH) surface were implanted into the tibia of the rabbits. Then, orthodontic forces with Ni[ndash]Ti coils were applied immediately to two of the three miniscrews in each tibia, with the center one serving as the control. After 2, 4, 8 and 12 weeks, the rabbits were sacrificed. ...
Source: Clinical Oral Implants Research - June 15, 2009 Category: Dentistry Authors: Chin-Shan Chang, Tzer-Min Lee, Chih-Han Chang, Jia-Kuang Liu Source Type: journals

Osseointegration of zirconia and titanium dental implants: a histological and histomorphometrical study in the maxilla of pigsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The purpose of the present study was to histologically compare the bone tissue responses to surface-modified zirconia and titanium implants. Threaded zirconia implants were produced using a new low-pressure injection moulding technique and thereafter surface treated by acid etching. Titanium implants with the exact shape and surface treated by sandblasting and acid etching (SLA) served as controls. Fifteen adult pigs received both implant types in the maxilla 6 months after extraction of the second and third incisors. The animals were sacrificed after 4, 8 and 12 weeks and 30 implants with surrounding bone were retrieved. ...
Source: Clinical Oral Implants Research - June 15, 2009 Category: Dentistry Authors: M. Gahlert, S. Röhling, M. Wieland, C. M. Sprecher, H. Kniha, S. Milz Source Type: journals

Immunohistochemical, tomographic and histological study on onlay bone graft remodeling. Part II: calvarial boneEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The objectives of this study are (1) to study the morphological pattern of Cb onlay bone grafts and compare them with the biological events through immunohistochemical responses and (2) to establish the effects of perforations in maintaining the volume and bone density of the receptor bed. Sixty New Zealand White rabbits were submitted to Cb onlay bone grafts on the mandible. In 30 rabbits, the receptor bed was perforated (perforated group), while for the remaining animals the bed was kept intact (non-perforated group). Six animals from each group were sacrificed at 5, 7, 10, 20 and 60 days after surgery. Histological sect...
Source: Clinical Oral Implants Research - June 15, 2009 Category: Dentistry Authors: Wagner Fernandes Pedrosa Jr, Roberta Okamoto, Paulo Esteves Pinto Faria, Maya Fernanda Manfrin Arnez, Samuel Porfírio Xavier, Luiz Antonio Salata Source Type: journals

Acellular dermal matrix as a barrier in guided bone regeneration: a clinical, radiographic and histomorphometric study in dogsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The purpose of this study was to evaluate the effectiveness of the acellular dermal matrix (ADM) as a membrane for guided bone regeneration (GBR), in comparison with a bioabsorbable membrane. In seven dogs, the mandibular pre-molars were extracted. After 8 weeks, one bone defect was surgically created bilaterally and the GBR was performed. Each side was randomly assigned to the control group (CG: bioabsorbable membrane made of glycolide and lactide copolymer) or the test group (TG: ADM as a membrane). Immediately following GBR, standardized digital X-ray radiographs were taken, and were repeated at 8 and 16 weeks post-oper...
Source: Clinical Oral Implants Research - June 10, 2009 Category: Dentistry Authors: Germana Jayme Borges, Arthur Belém Novaes Jr, Márcio Fernando de Moraes Grisi, Daniela Bazan Palioto, Mário Taba Jr, Sérgio Luís Scombatti de Souza Source Type: journals

Sinus augmentation analysis revised: the gradient of graft consolidationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Graft consolidation follows a gradient that reflects the properties of bone substitutes at sites of sinus augmentation. Here we present an analytical method to investigate the process of graft consolidation taking the distance from the maxillary host bone into account. We therefore evaluated histological specimens, 6 and 12 weeks after the sinus of minipigs was augmented with Bio-Oss®, a deproteinized bovine bone mineral, and Ostim®, an aqueous paste of synthetic nanoparticular hydroxyapatite. A curve was drawn that represents the changes in histomorphometric parameters within a given distance from the maxillary host bon...
Source: Clinical Oral Implants Research - June 10, 2009 Category: Dentistry Authors: Dieter Busenlechner, Christian D. Huber, Christoph Vasak, Antonia Dobsak, Reinhard Gruber, Georg Watzek Source Type: journals

Correlating implant stability to bone structureEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
This study confirms the relevance for primary stability of cortical thickness around implants. The thickness of cortical bone can be assessed using a standard clinical CT. To cite this article:Rozé J, Babu S, Saffarzadeh A, Gayet-Delacroix M, Hoornaert A, Layrolle P.Correlating implant stability to bone structure.Clin. Oral Impl. Res. xx, 2009; 000[ndash]000. (Source: Clinical Oral Implants Research)
Source: Clinical Oral Implants Research - June 10, 2009 Category: Dentistry Authors: Julie Rozé, Stéphanie Babu, Afchine Saffarzadeh, Marie Gayet-Delacroix, Alain Hoornaert, Pierre Layrolle Source Type: journals