Shoulder: Trauma

Biomechanical Comparison of Contemporary Clavicle Fixation Devices

Renfree T, Conrad B, Wright T (Univ of Florida, Gainesville) J Hand Surg 35A:639-644, 2010^§

Abstract

Purpose

Because recent studies have shown that malunited or nonunited clavicle fractures treated nonsurgically have poor outcomes, early fixation of certain clavicle shaft fractures using contemporary implants has become more common. Little is known about the physiologic loading of these implants. This study was designed to observe the biomechanical behavior and strength of implants used for fixation of the clavicle shaft.

Methods

We used synthetic clavicle bones that were produced in 2 pieces to replicate the conditions of a transverse fracture. Ten specimens per group were tested using 3 clavicle fixation constructs: precontoured clavicle plates with unicortical locking, precontoured clavicle plates with bicortical nonlocking screws, and intramedullary Rockwood clavicle pins. Two loading conditions were used: cantilever bending and 3-point bending.

Results

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