Glenosphere disengagement in a reverse total shoulder arthroplasty with a non-Morse taper design

摘要

In modern modular reverse total shoulder arthroplasty designs, glenosphere disengagement has recently been described in systems that use a locking screw and Morse taper for fixation between the glenosphere and baseplate. This complication is unreported in modern systems that do not use a Morse taper design. The purpose of this paper is to report cases of glenosphere disengagement and its incidence in a previously unreported design.