Chevron bunionectomy fixation: in vitro stability assessment of plate-and-screw system compared with Kirschner wire.

Abstract

Many methods for internal fixation of the Chevron bunionectomy have been described. Currently available fixation devices stabilize the osteotomy sufficiently to ensure healing. Each has unique advantages and disadvantages. A low-profile plate buried beneath capsular tissue eliminates some complications of other forms of fixation. The authors compared the structural characteristics of a low-profile plate-and-screw system and of a single Kirschner wire. Testing was performed on dissected human cadaveric specimens by using a Telos strain gauge. Loads were applied both from the medial to the lateral aspect and from the plantar to the dorsal aspect at the capital fragment. Results indicate that both modes of fixation can resist Chevron osteotomy displacement in vitro.