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.

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Discussion

Authors

Lionel Athlani

Centre Chirurgical Marie Lannelongue

Nicolas Gualdes

M. Bergere

Swissmedic

Journals

Journal of Hand Surgery (European Volume)

Actions

Institutions

University Hospital of Geneva

Geneva College

Swissmedic

References and Citations

Connected Papers

Building similarity graph...

Analyzing shared references across papers

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

Key Points

Abstract

Citation Network

Connected Papers

Discussion

Authors

Journals

Actions

Institutions

References and Citations

Citation Network

Connected Papers

Discussion

Cite this study