| 摘要 |
<p>An implantable orthopedic prosthesis is provided that includes a shell (10) having a substantially concave inner surface (16) defining a cavity (22) and a substantially annular groove (79) formed therein. The prosthesis further includes a polymeric insert (60) that is positionable within the cavity (22) of the shell (10), and that has a substantially convex outer surface (62) and a circumferential protrusion (78) projecting therefrom. The protrusion (78) has a substantially trapezoidal cross section wherein at least one of the sides of the trapezoid is substantially parallel to the axis of symmetry of the insert (60). The cross section of the protrusion (78) is substantially congruent to the cross section of the groove (79) of the shell (10), and the inner surface (16) of the shell (10) is substantially congruent with a corresponding portion of the outer surface (62) of the insert (60) when the insert (60) is properly positioned within the cavity (22) of the shell (10).</p> |
