[Rubis 2 trapezometacarpal prosthesis: concept, operative technique].

INTRODUCTION

We have implanted 49 uncemented reversed trapeziometacarpal prostheses since 1997.

OPERATIVE TECHNIQUE: We used a classical dorsal approach. A good preparation of the base of the first metacarpal will give excellent exposure of the trapezium, the most important stage of the operation. Instrumentation allows easy insertion of the two components and also their adjustment.

RESULTS

A follow-up of three years is too short and we intend to give our full results at five years. At the present time the patients are well and seem satisfied.

DISCUSSION: The reversed design of this prosthesis is useful because it spares the scarce bone stock of the trapezium. The shape of the trapezial implant prevents not only its sinkage but also any lateral movement.