Critical shoulder angle: Acromial coverage is more relevant than glenoid inclination

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
Silvan BeelerC Gerber

Abstract

It is still unknown whether glenoid inclination or lateral acromial roof extension is a more important determinant for development of rotator cuff tears (RCT) or osteoarthritis (OA) of the shoulder. It was the purpose of this study, to evaluate whether there is a potential predominance of one of these factors in pathogenesis of RCT or concentric OA. We analyzed 70 shoulders with advanced degenerative RCT and 54 shoulders with concentric OA undergoing primary shoulder arthroplasty (anatomical or reverse) using antero-posterior radiography and multiplanar computed tomography. The two groups were compared in relation to glenoid inclination, lateral acromion roof extension, acromial height, and critical shoulder angle (CSA). All measured parameters were highly significantly different between RCT and concentric OA (p < 0.001). Based on Cohen's d effect size, group differences were most distinct in lateral acromial roof extension (1.36x-ray , 0.92ct ) compared with acromial height (1.06x-ray , 0.73ct ) and glenoid inclination (0.60x-ray , 0.61ct ). However, no single factor showed an effect size which was as high as that of the CSA (1.63x-ray ). Interestingly, a ratio of lateral acromion roof extension and acromial height could enhan...Continue Reading

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Citations

Jan 23, 2020·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Matthijs JacxsensHeath B Henninger
Jun 18, 2019·The Journal of the American Academy of Orthopaedic Surgeons·Charles L GetzTyler J Brolin
Nov 21, 2019·Skeletal Radiology·Amélie LoriaudLionel Pesquer
Oct 14, 2018·BMC Musculoskeletal Disorders·Dominik KaiserDominik C Meyer
Aug 1, 2019·Operative Orthopädie und Traumatologie·Kilian RuecklPiet Plumhoff
Nov 2, 2020·Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association·Jingyi HouRui Yang
Aug 22, 2020·Journal of Shoulder and Elbow Surgery·Filip VerhaegenLennart Scheys
Apr 12, 2020·Orthopaedics & Traumatology, Surgery & Research : OTSR·Vincent HardyLaurent Hubert
Jun 6, 2020·Journal of Shoulder and Elbow Surgery·Guillaume VillattePeter Reilly
Jul 21, 2020·Journal of Shoulder and Elbow Surgery·Anne-Marie CauchonNicola Hagemeister
Apr 20, 2021·Orthopaedics & Traumatology, Surgery & Research : OTSR·Vincent HardyLaurent Hubert
Jun 18, 2021·JSES International·Peter N ChalmersRobert Z Tashjian
Aug 15, 2021·Orthopaedics & Traumatology, Surgery & Research : OTSR·Vincent HardyLaurent Hubert

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