Trapeziometacarpal prosthesis: an updated systematic review.

The trapeziometacarpal prosthesis is mostly used in Europe to treat osteoarthritis of the basal joint of the thumb. Its supposed benefits are that it restores the length of the thumb, improves strength, function and mobility while reducing recovery time compared to other surgical treatments. However, previous reviews of the literature could not confirm these assumptions. This article provides an updated systematic review to help answer to these questions through a methodical statistical analysis and to quantify the two main complications, namely failure and deep infection. To achieve these aims, a selection of articles including implant case series was done in the Medline database based on specific criteria. Data about pain, function, strength, infection, and failure were compiled and a statistical analysis was performed. Results show a fast recovery in terms of pain and function but the positive effect on strength seems limited. The failure rate represented by the revision rate is high and the deep infection rate is fairly low. Randomized controlled studies are needed to obtain reliable data to compare the prosthesis to other surgical treatments.