Results following removal of silicone trapezium metacarpal implants

In 100 consecutive patients treated by arthroplasty using Swanson's trapeziometacarpal implant, 32 showed subluxation or dislocation of the implant. Although function was excellent in those with a correctly placed implant, 18 of the 32 had disturbances of function and complaints which necessitated removal of the implant. An operative technique is described for removal of the implant and interposition of the imbricated abductor tendon. The result after removal of the Swanson implant was better than that following primary excision of the trapezium, especially with regard to stability and strength. Thus satisfactory function may be retrieved in patients in whom the implant has dislocated.