Biomechanical evaluation of three different fixation methods of the Chevron osteotomy of the olecranon: An analysis with Roentgen Stereophotogrammatic Analysis

BackgroundIn this study three different methods for fixating the Chevron osteotomy of the olecranon are evaluated. Transcortical fixed Kirschner wires with a tension band, a large cancellous screw with a tension band, and a large cancellous screw alone are compared using Roentgen Stereophotogrammatic Analysis (RSA).MethodsThe different fixation methods were tested in 17 cadaver specimens by applying increasing repetitive force to the triceps tendon. Forces applied were 200 N, 350 N, and 500 N. Translation and rotation of the osteotomy were recorded using Roentgen Stereophotogrammatic Analysis.FindingsBoth the fixations with a cancellous screw with tension band and with bi-cortical placed Kirschner wires with a tension band provide enough stability to withstand the forces of normal daily use.InterpretationSince fixation with a cancellous screw with tension band is a fast and easy method and is related to minimal soft tissue damage this method can preferably be used for fixation of a Chevron osteotomy of the olecranon.