Influence of Index Finger Proximal Interphalangeal Joint Arthrodesis on Precision Pinch Kinematics

Domalain M, Evans PJ, Seitz WH Jr, et al (Cleveland Clinic, OH) J Hand Surg 36A:1944-1949, 2011^§

Abstract

Purpose

To evaluate the impact of proximal interphalangeal (PIP) joint arthrodesis on the kinematics of precision pinch.

Methods

Eleven healthy subjects performed index finger–thumb pinch motions under 4 conditions: unrestricted thumb and index finger (CONTROL) and fusion of the PIP joint of the index finger in flexion of 30° (PIP30), 40° (PIP40), and 50° (PIP50). Fusion was simulated with metallic splints. Kinematics of the thumb and index finger were recorded with a motion capture system.

Results

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