| abstract |
(57) [Summary] [Object] It is an object of the present invention to provide a method for forming a prosthetic carpal-metacarpal (CMC) joint that restores normal joint movement, and a joint manufactured thereby. The method positions a first axis of rotation 10 and a second axis 20 having a predetermined relationship that does not intersect the first axis at right angles and does not intersect the torus for both the first axis and the second axis. Is a surface of revolution that mathematically includes the steps used to model the bearing surface of the prosthetic joint. The prosthesis has a first side and a second side, The first surface is attached to the ridged member 102, which is a plane of rotation about both the first axis and the second axis, the second surface of the ridged member, A plurality of nails 134 that engage and secure the ridge bone 106. a, 134b, 134c, engageable with the ridged member, A metacarpal member 104 having a first surface sized to fit with the first surface of a ridged member, and attached to the metacarpal member and inserted into the proximal metacarpal tunnel of the first metacarpal bone It is configured to include a stem 140 for fixing the middle member. |