| 摘要 |
A prosthetic implant (15,41,61) for partial resurfacing of the ulna at the distal radioulnar(DRU) joint which comprises a stem (17,45,69) and an ulnar head (19,43,67). The combination of the anchoring stem and the head that is shaped and proportioned to replace only a portion of the distal ulnar head and the radial articulating surface and to interface with the resected ulna at a proximal stabilizing surface provides excellent stability. In the preferred embodiment, a pair of strategically located surfaces (27,29) aligned at an obtuse angle provides the stabilizing surface arrangement. A set of such implants with different head and stem sizes allows a surgeon to best accommodate patient physiology and locate a resurfaced head section offset from the canal center in order to provide an articular surface (31,51,71) adjacent the radius which will allow the radius to smoothly pivot and translate therearound during pivoting of the forearm. |
