Biomechanics of Fracture Fixation

Abstract

This article reviews the biomechanical parameters of fracture repair that influence construct stiffness and strength. The stiffness influences the relative motion between fracture fragments, known as gap strain, and, thus, callus development. Construct strength determines the magnitude and number of load events that the repair can resist before failure. Surgeons must optimize these parameters in order to achieve satisfactory outcomes for the patients.

Keywords: Area moment of inertia; Biomechanics; Direct and indirect bone healing; Fatigue; Gap strain; Stiffness; Working length; Yield strength.