Journal of Orthopaedic Surgery and Research via MedWorm.com

Comparison of cement pressurisation in flanged and unflanged acetabular cups

Journal of Orthopaedic Surgery and Research — Fri, 03 Feb 2012 05:00:00 +0100

Conclusions: Our experiment suggests that flanged cups do not consistently generate significantly higher cement pressures compared to unflanged cups. (Source: Journal of Orthopaedic Surgery and Research)

Mid-term functional outcome after the internal fixation of distal radius fractures

Journal of Orthopaedic Surgery and Research — Thu, 26 Jan 2012 05:00:00 +0100

Conclusion: This single centre large population series demonstrates good to excellent results in the majority of patients after volar locking plate fixation of the distal radius, with complication rates comparable to other non-operative and operative treatment modalities. On this basis we recommend this mode of fixation for distal radius fractures requiting operative intervention. (Source: Journal of Orthopaedic Surgery and Research)

Open wedge high tibial osteotomy: cause of patellar descent

Journal of Orthopaedic Surgery and Research — Thu, 12 Jan 2012 05:00:00 +0100

: This was a retrospective review of the nine open wedge high tibial osteotomy (HTO) done in a regional hospital in Hong Kong from 2006 to 2008. The mechanical hip-knee-ankle angle improved from average 169.5 degrees(164-175) to average 183.9 degrees (179-187). Patellar descent was noted in all patients postoperatively, with Blackburne-Peel (BP) index significantly changing from 0.78 (0.64-0.93) to 0.59 (0.38-0.78) (p (Source: Journal of Orthopaedic Surgery and Research)

Hook plate fixation of acute displaced lateral clavicle fractures: mid-term results and a brief literature overview

Journal of Orthopaedic Surgery and Research — Wed, 11 Jan 2012 05:00:00 +0100

Conclusions: The clavicle hook plate is a good primary treatment option for the acute displaced lateral clavicle fracture with few complications. At mid term the results are excellent and no long term complications can be addressed to the use of the plate. (Source: Journal of Orthopaedic Surgery and Research)

Risk factor analysis for early femoral failure in metal-on-metal hip resurfacing arthroplasty: the effect of bone density and body mass index

Journal of Orthopaedic Surgery and Research — Tue, 10 Jan 2012 05:00:00 +0100

Conclusions: We recommend that dual energy x-ray absorptiometry scan T-score tests should be routinely performed on all hip resurfacing patients pre-operatively. If a patient has a low T-score (< =-1.5), consideration should be given to additional precautions or treatments to alleviate his or her risk, especially when the patient has a higher body mass index (>=29 kg/m2). (Source: Journal of Orthopaedic Surgery and Research)

A comparison of Leg Length and Femoral Offset discrepancies in Hip Resurfacing, Large Head Metal-on-Metal and Conventional Total Hip Replacement: a case series

Journal of Orthopaedic Surgery and Research — Thu, 29 Dec 2011 05:00:00 +0100

Conclusion: The use of a larger-diameter femoral head in hip resurfacing does not fully account for the superior biomechanical restoration, as LHM did not restore femoral offset as accurately. We conclude that restoration of normal hip biomechanics is best achieved with hip resurfacing. (Source: Journal of Orthopaedic Surgery and Research)

Flexible intramedullary nailing in paediatric femoral fractures. A report of 73 cases

Journal of Orthopaedic Surgery and Research — Thu, 22 Dec 2011 05:00:00 +0100

Conclusion: Flexible intramedullary nailing is reliable and safe for treating paediatric femoral shaft fractures. It is relatively free of serious complications despite asymptomatic malalignment and LLD in significant percentage of fractures. (Source: Journal of Orthopaedic Surgery and Research)

A Rat Model of Early Stage Osteonecrosis Induced by Glucocorticoids

Journal of Orthopaedic Surgery and Research — Wed, 21 Dec 2011 05:00:00 +0100

Conclusions: We postulate that Wistar Kyoto, Wistar Furth and spontaneous hypertensive rats may be strains of rats more susceptible to develop ON of the femoral head while Fisher rats were the most resistant. (Source: Journal of Orthopaedic Surgery and Research)

Representation to the Accident and Emergency department within 1-year of a fractured neck of femur

Journal of Orthopaedic Surgery and Research — Wed, 21 Dec 2011 05:00:00 +0100

DiscussionThe causes for representation are varied and multifactorial. The results of this study suggest that some of those events or ailments necessitating readmission may be obviated and potentially reduced by interventions that can be instituted during the primary admission and continued following discharge. (Source: Journal of Orthopaedic Surgery and Research)

The influence of a weight-bearing platform on the mechanical behavior of two Ilizarov ring fixators: tensioned wires vs. half-pins

Journal of Orthopaedic Surgery and Research — Mon, 12 Dec 2011 05:00:00 +0100

Background: A weight-bearing platform applied at the distal end of an Ilizarov external frame allows patients with hindfoot transfixations, foot deformities or plantar skin lesions to bear weight. This leads to an indirect loading of the fracture or osteotomy site. However, the effect on the fracture/osteotomy site's motion or compressive loads is unknown. The aim of this study was to analyze the mechanical effects of a weight-bearing platform on the traditional all-wire, four-ring frame in comparison to a two-ring frame consisting of half-pins. Methods: Two frame configurations, with either anatomically positioned wires or half-pins, were analyzed with and without a weight-bearing platform applied underneath the distal ring. Composite tibiae with a mid-diaphyseal osteotomy of 3.5 mm were ...

Inverted 'V' osteotomy excision arthroplasty for bony ankylosed elbows

Journal of Orthopaedic Surgery and Research — Mon, 05 Dec 2011 05:00:00 +0100

Conclusion: We conclude that inverted 'V' osteotomy excision arthroplasty is a viable option in the treatment of bony ankylosis of the elbow in young patients. (Source: Journal of Orthopaedic Surgery and Research)

The suitability of an uncemented hydroxyapatite coated (HAC) hip hemiarthroplasty stem for intra-capsular femoral neck fractures in osteoporotic elderly patients: The Metaphyseal-Diaphyseal Index, a solution to preventing intra-operative periprosthetic fracture.

Journal of Orthopaedic Surgery and Research — Fri, 18 Nov 2011 05:00:00 +0100

This study will seek to identify a measurable radiographic index, the Metaphyseal-Diaphyseal Index (MDI) score to determine whether intra-operative fracture in osteoporotic bone can be predicted.A 5 year prospective cohort of 560 consecutive patients, undergoing hemiarthroplasty (cemented or uncemented), was evaluated. A nested case-control study to determine risk factors affecting intra-operative fracture was carried out.The Vancouver Classification was used to classify periprosthetic fracture.The MDI score was calculated using radiographs from the uncemented group. As a control (gold standard), Yeung et al's Canal Bone Ratio (CBR) score was also calculated. From this, a receiver operating characteristic (ROC) curve was formulated for both scores and area under the curve (AUC) compared. I...

The characteristics of the mechanoreceptors of the hip with arthrosis

Journal of Orthopaedic Surgery and Research — Wed, 16 Nov 2011 05:00:00 +0100

Mechanoreceptors have been extensively studied in different joints and distinct signals that convey proprioceptive information to the cortex. Several clinical reports have established a link between the number of mechanoreceptors and a deficient proprioceptive system; however, little or no literature suggest concentration of mechanoreceptors might be affected by hip arthrosis. The purpose of this study is first to determine the existence of mechanoreceptors and free nerve endings in the hip joint and to distinguish between their conditions: those with arthrosis and without arthrosis. Samples of 45 male hips were analyzed: 30 taken from patients with arthrosis that were submitted to total arthroplasty and 15 taken from male cadavers without arthrosis. The patients' ages ranged from 38 to75 ...

The treatment of scaphoid nonunion using the Ilizarov fixator without bone graft, a study of 18 cases

Journal of Orthopaedic Surgery and Research — Tue, 08 Nov 2011 05:00:00 +0100

Conclusions: In these selected patients this technique safely achieved bony union without the need to open the SNU site and without the use of bone graft. (Source: Journal of Orthopaedic Surgery and Research)

Osseointegration of porous titanium implants with and without an electrochemically deposited DCPD coating in an ovine model

Journal of Orthopaedic Surgery and Research — Thu, 03 Nov 2011 04:00:00 +0100

Conclusion: The application of a DCPD coating to porous titanium substrates may improve the extent of cancellous bone ingrowth in the early postoperative phase following uncemented arthroplasty. (Source: Journal of Orthopaedic Surgery and Research)

Modified femoral pressuriser generates a longer lasting high pressure during cement pressurisation

Journal of Orthopaedic Surgery and Research — Mon, 17 Oct 2011 04:00:00 +0100

Conclusion: The modified pressuriser generates longer higher pressure durations in the femoral model. This design modification may enhance cement penetration into cancellous bone and could improve femoral cementation. (Source: Journal of Orthopaedic Surgery and Research)

Is there added risk in resurfacing a femoral head with cysts?

Journal of Orthopaedic Surgery and Research — Mon, 17 Oct 2011 04:00:00 +0100

Conclusion: Although the risk of early femoral failures among the group with cysts appeared higher than the group without cysts, we could not demonstrate a significant statistical difference between the two groups. It is possible that bone grafting cysts rather than cementing them may account for the low failure rate, and that this technique may minimize the risk of resurfacing a femoral head with cysts. (Source: Journal of Orthopaedic Surgery and Research)

Bone quality and growth characteristics of growth plates following limb transplantation between animals of different ages - Results of an experimental study in male syngeneic rats

Journal of Orthopaedic Surgery and Research — Fri, 14 Oct 2011 04:00:00 +0100

IntroductionThe purpose of this study was to identify graft osteoporosis post transplantation by micro-CT analysis, and the growth potential of growth plates in the transplanted limb. Methods: Ten juvenile to juvenile and five juvenile to adult hind limb transplants were performed in male syngeneic Lewis rats. Upper tibial bone density in isochronograft and heterochronograft limbs was measured by 3D micro-CT and compared with that of the opposite non-operated limbs. Results: We observed inferior bone quality (p (Source: Journal of Orthopaedic Surgery and Research)

Oxford Unicompartmental Knee Arthroplasty: medial pain and functional outcome in the medium term

Journal of Orthopaedic Surgery and Research — Mon, 10 Oct 2011 04:00:00 +0100

Conclusion: In our hands the functional outcome following Oxford Unicompartmental knee replacement was variable, with a high incidence of medial knee discomfort which did not correlate with the postoperative radiographic scores, pre-op arthritis and positioning of the prosthesis. (Source: Journal of Orthopaedic Surgery and Research)

Residual malformations and leg length discrepancy after treatment of fibular hemimelia

Journal of Orthopaedic Surgery and Research — Tue, 27 Sep 2011 04:00:00 +0100

Conclusions: Treatment of fibular hemimelia, even in cases graded as successful, showed to be accompanied by a number of persisting residual deformities and recurrent leg length inequality. Although the number of patients is limited, the high rate of this phenomenon is indicative of the significance of the report. The family and the patients themselves should have the right expectations and will be more co-operative when well informed about this instance. A report of common post-treatment residual deformities should be valuable in best possible treatment planning of fibular hemimelia. (Source: Journal of Orthopaedic Surgery and Research)

The calcar screw in angular stable plate fixation of proximal humeral fractures - a case study

Journal of Orthopaedic Surgery and Research — Sat, 24 Sep 2011 04:00:00 +0100

Conclusions: The placement of calcar screws in the angular stable plate fixation of proximal humeral head fractures is associated with less secondary loss of reduction by providing inferomedial support. An increased risk for complications could not be shown. (Source: Journal of Orthopaedic Surgery and Research)

Pre-operative echocardiogram in hip fracture patients with cardiac murmur- an audit.

Journal of Orthopaedic Surgery and Research — Fri, 23 Sep 2011 04:00:00 +0100

Background: All hip fracture patients with a cardiac murmur have an echocardiogram as a part of their preoperative work-up in our unit. We performed a retrospective audit to assess the impact obtaining a pre-operative echocardiogram on the management of hip fracture patients. Methods: All hip fracture patients (N=349) between 01/06/08 and 01/06/09 were included in the study. 29 patients had pre-operative echocardiogram (echo group). A computer generated randomised sample of 40 patients was generated from N, 'non-echo' group. Data was obtained from medical records and the Hospital Information Support System (HISS). The groups were compared using Student's t test. Approval was obtained locally from the clinical governance department for this project. Results: Age and gender distribution were...

Proximal Screws Placement in Intertrochanteric Fractures Treated With External Fixation: Comparison of Two Different Techniques

Journal of Orthopaedic Surgery and Research — Thu, 22 Sep 2011 04:00:00 +0100

Conclusion: Parallel proximal screw placement in a parallel way is simple, with significant less radiation exposure and shorter intraoperative duration. In addition, fixation stability is equal compared to convergent pin placement. (Source: Journal of Orthopaedic Surgery and Research)

A genetic association study between Growth Differentiation Factor 5 (GDF 5) polymorphism and knee osteoarthritis in Thai population

Journal of Orthopaedic Surgery and Research — Wed, 21 Sep 2011 04:00:00 +0100

Conclusion: These data suggested that GDF5 polymorphism has an association with knee OA in Thai ethnic. This finding also supports the hypothesis that OA has an important genetic component in its etiology, and GDF5 protein might play important role in the pathophysiology of the disease. (Source: Journal of Orthopaedic Surgery and Research)

Biomechanical Analysis of a synthetic Femoral Spiral Fracture Model: Do End Caps improve Retrograde Flexible Intramedullary Nail Fixation?

Journal of Orthopaedic Surgery and Research — Sun, 18 Sep 2011 04:00:00 +0100

Background: Elastic Stable intramedullary Nailing (ESIN) of dislocated diaphyseal femur fractures has become an accepted method for the treatment in children and adolescents with open physis. Studies focused on complications of this technique showed problems regarding stability, usually in complex fracture types such as spiral fractures and in older children weighing > 40 kg. Biomechanical in vitro testing was performed to evaluate the stability of simulated spiral femoral fractures after retrograde flexible titanium intramedullary nail fixation with and without End caps. Methods: Eight synthetic adolescent-size femoral bone models (Sawbones(R) with a medullar canal of 10 mm and a spiral fracture of 100 mm length identically sawn by the manufacturer) were used for each group. Both groups u...

Non-invasive interactive neurostimulation (InterX) reduces acute pain in patients following total knee replacement surgery: a randomised, controlled trial

Journal of Orthopaedic Surgery and Research — Tue, 23 Aug 2011 23:00:00 +0100

Conclusions: The results clearly demonstrated the clinical benefit of NIN therapy as a supplement to the standard rehabilitation protocol. The subjects receiving InterX fared significantly better clinically. Within a relatively short 3-day period of time, patients in the experimental group obtained the necessary ROM for discharge and did it experiencing lower levels of pain than those in the control group. (Source: Journal of Orthopaedic Surgery and Research)

Kyphoplasty in osteoporotic vertebral compression fractures - Guidelines and technical considerations

Journal of Orthopaedic Surgery and Research — Thu, 18 Aug 2011 23:00:00 +0100

Osteoporotic vertebral compression fractures are a menace to the elderly generation causing diminished quality of life due to pain and deformity. At first, conservative treatment still is the method of choice. In case of resulting deformity, sintering and persistent pain vertebral cement augmentation techniques are widely used. Open correction of resulting deformity by different types of osteotomies addresses sagittal balance, but has comparably high morbidity.Besides conventional vertebral cement augmentation techniques balloon kyphoplasty has become a popular tool to address painful thoracic and lumbar compression fractures. It showed improved pain reduction and lower complication rates compared to standard vertebroplasty. Interestingly the results of two placebo-controlled vertebroplast...

Reverse shoulder arthroplasty leads to significant biomechanical changes in the remaining rotator cuff

Journal of Orthopaedic Surgery and Research — Mon, 15 Aug 2011 23:00:00 +0100