Implant arthroplasty of the metacarpophalangeal joint of the thumb

Thumb metacarpophalangeal arthritis may affect overall hand function more t han expected because pain and instability compromise pinch and grip strengt h. Implant arthroplasty represents one option in the treatment of deformity destruction, and instability at the metacarpophalangeal joint level. Appro priate use of implant arthroplasty requires careful evaluation of the overa ll deformity and the status of the interphalangeal joint. If the interphala ngeal joint is likely to require fusion-either simultaneous with metacarpop halangeal surgery or subsequently-then implant arthroplasty may be the best treatment option for the metacarpophalangeal joint.