Wrist prosthesis
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United States of America Patent
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-
Jun 16, 1998
Grant Date -
N/A
app pub date -
Nov 11, 1996
filing date -
Feb 24, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A wrist prosthesis has a radial part and a metacarpal part (12). A joint connection (15) connects the radial and the metacarpal parts including shafts for placement in the metacarpal bone and the carpal regions. The joint connection (15) is biaxial and permits both dorsal/palmar flexion and radial/ulnar deflection. The radial/ulnar flexion has a swivel radius (R.sub.1). The dorsal/palmar flexion has a swivel radius (R.sub.2). The radius (R.sub.1) is greater than the radius (R.sub.2). The contacting joint surfaces are congruent in all relative positions. A separate collar is provided for slipping onto the shaft of the radial part. The collar has a conical taper, a roughened surface and longitudinal ribs.
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