A comparative study of wire fixation and screw fixation in arthrodesis for the correction of hallux rigidus using an in vitro biomechanical model.

Abstract

Arthrodesis of the great toe metatarsophalangeal joint for osteoarthritis usually involves internal fixation. Ideally, the fixation method should be reproducible, leading to a high rate of fusion and minimal complications. This biomechanical study compares circumferential wire and screw fixation methods of arthrodesis. The two arthrodesis models have remarkably similar limits of elastic and plastic deformation. However, in the screw, failure by permanent deformation occurs at a load six times higher than the wire. The use of circumferential wire fixation for osteoporotic bones in which screw purchase is poor is reasonable and for quality bone, screw fixation may be preferable.