No relationship between critical shoulder angle and glenoid erosion after shoulder hemiarthroplasty: a comparative radiographic study.

Cerciello, S.; Morris, B.; Visonà, E.; Corona, K.; Edwards, T.; Maffulli, N.; Walch, G.; Morris, B J; Visonà, E; Edwards, T B

Introduction: Symptomatic glenoid erosion is one of the most common causes of functional impairment after shoulder hemiarthroplasty. A decrease in the critical shoulder angle (CSA) has been associated with the development of shoulder arthritis. The inter-observer reliability of the CSA and the relationship between CSA and symptomatic glenoid erosion after shoulder hemiarthroplasty were investigated.Materials and Methods: Twenty-eight patients with symptomatic glenoid erosion after anatomic hemiarthroplasty were compared to a control group of 30 patients with no signs of symptomatic glenoid erosion. The CSA was measured by two blinded shoulder surgeons at a mean follow-up of 105.2 and 54.7 months, respectively. The inter-observer reliability was calculated.Results: The mean CSA in the control group in neutral, internal, and external rotations was 34°, 33°, and 33°, respectively. The corresponding values in the study group were 33°, 33°, and 33° (Conclusion: There were no significant differences of CSA values between the two groups. Good inter-observer reliability was found for the CSA method.

OSTEOARTHRITIS treatment; SHOULDER disorders; SHOULDER surgery; HEMIARTHROPLASTY; FOLLOW-up studies (Medicine); SYMPTOMS; RADIOGRAPHY; ORTHOPEDICS; SHOULDER joint surgery; COMPARATIVE studies; RANGE of motion of joints; RESEARCH methodology; MEDICAL cooperation; OSTEOARTHRITIS; REOPERATION; RESEARCH; RESEARCH evaluation; SCAPULA; SHOULDER joint; SURGICAL complications; EVALUATION research; RESEARCH bias; SURGERY

Archives of Orthopaedic & Trauma Surgery, 2017, Vol 137, Issue 7, p919

0936-8051

Academic Journal

10.1007/s00402-017-2708-9