Relationship between cup position and neck type in the TOUCH® trapeziometacarpal prosthesis: a CAD simulation and cadaver study

Lionel Athlani, Nicolas Gualdes, Mariette Bergere, Bernard Prandi, Damien Motte, Julie Mottet

Journal of Hand Surgery (European Volume): Journal of the British Society for Surgery of the Hand & Official Journal of the Federation of European Societies for Surgery of the Hand

Published online on March 16, 2026

Abstract

Journal of Hand Surgery (European Volume), Ahead of Print.
Introduction:Posteroanterior cup angulation relative to the proximal articular surface of the trapezium (PAST) and neck type (15° offset or 0° straight) may influence the risk of intraprosthetic impingement in the TOUCH®prosthesis. We assessed this ...