Dynamic position of the thumb metacarpophalangeal joint in patients with secondary passive hyperextension from base of thumb arthritis

This study seeks to understand passive metacarpophalangeal hyperextension, dynamic position and pinch strength in patients with trapeziometacarpal joint arthritis. Our finding of poor correlation suggests passive metacarpophalangeal hyperextension in patients with trapeziometacarpal arthritis may not reliably indicate a need for thumb metacarpophalangeal stabilization.