Reverse total shoulder arthroplasty has been shown to be an effective treatment for patients with rotator cuff tears and deficiencies. With the loss of rotator cuff strength, superior subluxation of the humeral head becomes a problem leading to excessive wear and superior glenoid bone deficiency. The presence of this superior defect can lead to complications when performing reverse total shoulder arthroplasty largely due to glenoid baseplate loosening.

This laboratory-based biomechanics study utilizes custom test systems to quantify the effect of different levels of superior bone defect on initial stability of the baseplate.

Mark Ehrensberger, PhD, Thomas Duquin, MD

Zimmer Biomet

2015-2017