Glenoid morphology rather than version predicts humeral subluxation: a different perspective on the glenoid in total shoulder arthroplasty.

摘要: Background Glenoid retroversion is thought be important in shoulder stability before and after arthroplasty; thus, many authors recommend glenoid reaming to correct improve stability. Genetic analysis has revealed that vault scapular development are controlled by different genes environmental factors, resulting diverse morphologies. We therefore analyzed the relative contribution of morphology version humeral head position. Materials methods obtained 121 computed tomography scans preoperatively for arthroplasty. Humeral subluxation were measured on axial image at middle each glenoid. was characterized as biconcave, worn, displaced, dysplastic, angled, or neutral. The strength correlation between subluxation, version, analyzed. Results did not correlate with subluxation. highest frequency posterior noted biconcave glenoids. Shoulders other morphologies more likely have anterior central positioning humerus. mean ratio glenoids 0.56 significantly from all ( P Discussion/Conclusion Even arthritic shoulder, orientation does appear explain complex biomechanics causes total arthroplasty multifactorial may include static dynamic soft-tissue forces. deserves attention surgery because high association