The Journal of hand surgery
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To apply carpal kinematic analysis using noninvasive medical imaging to investigate the midcarpal and radiocarpal contributions to wrist flexion and extension in a quasidynamic in vitro model. ⋯ The capitate and scaphoid tend to move together. This results in greater flexion/extension for the scaphoid than the lunate at the radiocarpal joint. The lunate has greater midcarpal motion between it and the capitate than the scaphoid does with the capitate. The engagement between the scaphoid and capitate is particularly evident during wrist extension. Out-of-plane motion was primarily ulnar deviation at the radiocarpal joint during flexion. These results are clinically useful in understanding the consequences of isolated fusions in the treatment of wrist instability.
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The current trend is to treat distal radius fractures with open reduction and internal fixation with either titanium or stainless steel plates. Both provide stable fixation; however, there is minimal evidence concerning the soft-tissue response to these materials. Our objective was to evaluate the response of adjacent extensor tendons to titanium and stainless steel in a rabbit in vivo model and to evaluate the influence of time. ⋯ Our results indicate that both implants generated adjacent reactive inflammatory tissue and particulate debris. There was no difference in cell or particle number produced by both materials. There is a statistically significant increase in inflammatory cells with increasing time of implantation.
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Randomized Controlled Trial Comparative Study
Both-bone forearm osteotomy for supination contracture: a cadaver model.
To quantify the magnitude of rotational correction possible when comparing a single forearm bone osteotomy and fixation with stepwise osteotomy and fixation of both bones in a cadaver model and to determine if the order in which the stepwise osteotomies are performed influences the amount of correction. ⋯ Rotational osteotomy of both forearm bones can create approximately 100 degrees of correction when performed at the proximal ulna followed by the distal radius. If less rotation is needed then the distal radius osteotomy alone can provide approximately 60 degrees of correction.
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Boxer's knuckle is a tear of the metacarpophalangeal (MCP) joint capsule that occurs while punching. Because of the nature of boxing, boxer's knuckle tends to be a chronic condition and often is associated with sagittal band rupture. Chronic cases often feature excessive scarring in the damaged area where the sagittal band and the MCP joint capsule become indistinguishable. The purpose of this study was to ascertain whether extensor retinaculum grafting to the defect is useful in treating chronic boxer's knuckle when direct repair of a capsular tear is not possible. ⋯ Therapeutic, Level IV.
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To determine how corticosteroid injections for trigger finger affect the blood glucose level in diabetic patients and the clinical results of those injections. ⋯ Therapeutic, Level IV.