Influence of the trapeziometacarpal joint fusion on thumb muscles and thumb-tip movement: A cadaveric study

Background Trapeziometacarpal (TMC) arthrodesis provides stability and strength of the thumb, whereas fixation of the TMC joint restricts motion of the thumb, which may consequently impair the activity of daily living. The objective of our study was to investigate how length and area of the thumb-tip trajectory were reduced after the TMC joint fusion. Methods Six fresh, frozen cadavers were used for this study. Tension was applied to the distal...