Biomechanical comparison of lumbosacral fixation techniques in a calf spine model.

Study Design: biomechanical testing of the strength and stability of lumbosacral fixation constructs.

Objectives: The purpose of this study was to quantify and compare the biomechanical properties of five different lumbosacral fixation constructs and determine the benefit of adding supplementary fixation to S1 screws.

Summary Of Background Data: Extension of long fusions to the sacrum remains a difficult clinical challenge.