What question did this study set out to answer?

This research examines how cup position affects neck type selection in trapeziometacarpal prostheses.

March 18, 2026

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

Key Points

This research examines how cup position affects neck type selection in trapeziometacarpal prostheses.
Conducted a CAD simulation to analyze cup angulation effects.
Performed a cadaver study to observe neck type impact on impingement risk.
Evaluated various cup tilt angles and their optimal neck alignments.
Cup placement parallel to the posteroanterior tilt (PAST) minimizes impingement risk.
Tilting the cup 15° or more anteriorly necessitates using a straight neck to prevent impingement.

Abstract

Posteroanterior cup angulation influences the choice of neck type. To minimize the risk of impingement, cup placement parallel to the PAST is optimal. When the cup is tilted 15° or more anteriorly, we recommend using a straight neck to reduce the risk of impingement during thumb extension.

Bookmark

Cite This Study

Athlani et al. (Sun,) studied this question.

synapsesocial.com/papers/69ba434a4e9516ffd37a453a https://doi.org/https://doi.org/10.1177/17531934261420149

Bookmark