Parameterization of proximal humerus locking plate impingement with in vitro, in silico, and in vivo techniques.

Background: Locked plating of displaced proximal humeral fractures is common, but rates of subacromial impingement remain high. This study used a multidisciplinary approach to elucidate the relationships between common surgical parameters, anatomic variability, and the likelihood of plate impingement.

Methods: The experiment was completed in 3 phases.