The Journal of hand surgery
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Comparative Study
Precontoured fixed-angle volar distal radius plates: a comparison of anatomic fit.
To compare distal radius volar fixed-angle plates for anatomic fit. ⋯ There was considerable variation in ideal plate location among the 7 plates tested. Total contact was minimal for all plates tested. The Synthes EA pin-subchondral bone distance was significantly greater than those of other plates tested. Joint penetration was relatively common, necessitating use of fluoroscopy and proper plate width.
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Scaphoid nonunions are a common complication of scaphoid fractures and frequently progress to degenerative arthritis. This study evaluated the effect of scaphoid nonunion on the in vivo kinematics of the radioscaphocapitate articulation. ⋯ Scaphoid nonunions have a dramatic impact on carpal kinematics, partially uncoupling the proximal and distal carpal rows. Although the results of this in vivo study differ from past in vitro studies, the increase in lunocapitate motion we identified is consistent with the current theory that the scaphoid acts as a fundamental link between the proximal and distal carpal rows.
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Comparative Study
Diagnostic comparison of 1.5 Tesla and 3.0 Tesla preoperative MRI of the wrist in patients with ulnar-sided wrist pain.
The diagnostic sensitivity, specificity, and accuracy of 1.5 Tesla (T) and of 3.0T magnetic resonance imaging (MRI) are correlated with wrist arthroscopy findings in patients presenting with ulnar-sided wrist pain. ⋯ The sensitivity, specificity, and accuracy of 3.0T wrist MRI for the TFCC is consistently higher compared with those of 1.5T wrist MRI. The trend suggests that 3.0T wrist MRI provides improved capability for detection of TFCC injuries. Given the available sample size, however, the confidence intervals around the point estimates are wide and overlapping. Further studies are needed to confirm or refute our results of the estimated sensitivity, specificity, and accuracy parameters.
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Comparative Study
Comparison of 2 surgical approaches for volar locking plate osteosynthesis of the distal radius.
To determine whether a volar radial (Henry) exposure to the distal radius is associated with less median nerve dysfunction than a direct volar exposure of the distal radius through the carpal tunnel that has been abandoned due to median nerve problems. ⋯ Therapeutic III.
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Carpal tunnel syndrome (CTS) impairs the performance of fine motor tasks of the hand, leading to clumsiness. Precision pinch by the thumb and index finger is a frequent task that requires the fine control of each digit as well as the coordination of the 2 digits. The purpose of this study was to examine the performance of precision pinch movements impaired by CTS. ⋯ Carpal tunnel syndrome impairs the performance of precision pinch movement as indicated by the increased variability. The results correlate with the observed clumsiness or lack of dexterity for patients with CTS.