Cause analysis of the liner dissociation of a customized reverse shoulder prosthesis based on finite element analysis.

ABSTRACT: Background: Dissociation of the polyethylene liner after reverse shoulder arthroplasty could cause shoulder dislocation that could not achieve closed reduction. The cause of liner dissociation is currently unclear. Method: Non-homogeneous model of the bone was constructed and dynamic finite element analysis was utilized to simulate the impingement of the polyethylene liner and scapula during humeral adduction. The stress distribution of the fixation claws, their degree of deformation (DOD), and the stress of the impingement sites in three initial humeral postures (neutral, 30° flexion, and 30° extension) were measured and analyzed. The influence of the liner material stiffness was also investigated. Result: The impingement stress on the liner and scapula was 100-200 MP

SUBMITTER: Wan Q 

PROVIDER: S-EPMC9755191 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature