Comparison of Expandable and Fixed Interbody Cages in a Human Cadaver Corpectomy Model: Fatigue Characteristics.

Study Design:In vitro cadaver biomechanics study.Objective:The goal of this study is to compare the in situ fatigue life of expandable versus fixed interbody cage designs.Summary of Background Data:Expandable cages are becoming more popular, in large part, due to their versatility; however, subsiden