Carpus

Scaphoid Excision and Midcarpal Arthrodesis: The Effect of Triquetral Excision—A Biomechanical Study

Cohen MS, Werner FW, Sutton LG, et al (Rush Univ Med Ctr, Chicago, IL; SUNY Upstate Med Univ, Syracuse, NY) J Hand Surg 37A:493-499, 2012^§

Abstract

Purpose

To evaluate the biomechanical alterations that occur after traditional scaphoid excision and midcarpal arthrodesis with and without excision of the triquetrum. The hypothesis of this study was that removal of the triquetrum increases the radiolunate contact pressure.

Methods

We cyclically moved 10 fresh cadaver wrists using a wrist joint motion simulator while measuring the contact pressures between the proximal carpal row and the distal radius and ulna using a dynamic pressure sensor. We acquired data in the intact wrist, after a midcarpal arthrodesis with the scaphoid excised, and then again with the triquetrum removed, which is also known as a capitolunate arthrodesis.

Results

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