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International Journal of Recent Trends in Science and Technology, ISSN 2277-2812 E-ISSN: 2249-8109
Volume 15, Issue 3, July 2015 pp 486-490
A morphometric study of glenoid cavity of adult human scapula
Moosa Shajiya Sarwar1, Diwan C V2, Abdul Rafe3, Habeeb-ur-Raheman4, Shadab Munawar Moosa5
1Ex Resident, 2Professor & HOD, 3Assistant Professor, Department of Anatomy, Government Medical College, Aurangabad, Maharashtra, INDIA.
4Resident, Department of Microbiology, LTMC, Sion, Mumbai, Maharashtra.
5Assostant Professor, Department of Physiology, JIIU’s Indian Institute of Medical Sciences and Research, Warudi, Badnapur, Jalna, Maharashtra, INDIA.
Aim of Study: The Glenoid cavity regarded as the head of the scapula has important clinical implications in the prognosis and treatment of various orthopedic pathologies like primary gleno-humeral osteoarthritis, gleno-humeral instability and the like. Similarly dimensions of the glenoid cavityare important in designing and fitting of glenoid components for total shoulder arthroplasty. Thus thorough understanding of the variations in its normal anatomy is essential for accurate diagnosis and treatment. Methods: The study was conducted in the Department of Anatomy, GMC, Aurangabad, Maharashtra, on 100 dry, unpaired adult human scapulae of unknown sexes, free from any pathology. Damaged scapulae were excluded from this study. Three glenoiddiameters superior-inferior, anterior-posterior diameter of the lower half and anterior-posterior diameter of the upper half of the glenoid were measured. Similarly variations in the shape of the glenoid cavity were noted and classified into three different types. Results: The study showed the glenoid cavity to be pear shaped most commonly. The measurements of the glenoid obtained using digital vernier calipers were found to be more on right side as compare to left. The average superior-inferior diameter on right and the left sides were 35.22±3.26mm and 34.53±3.21mm respectively. The average anterior-posterior diameter of the lower half of the right glenoid was 23.95±2.78mm and that of the left was 23.64±2.37mm. The mean diameter of the upper half of the right glenoid was 16.16±2.38mm and that of the left was 15.34±2.17mm. Conclusion: The average supero-inferior glenoid diameter in our study was 34-35 mm., however these anatomical specimens were non-arthritic which mean that the average supero-inferior glenoid diameter in an arthritic glenoid would be lesser due to bone loss. Moreover, the diameter would further decrease following reaming of the glenoid. The standard available smallest glenoid component in the market is 40mm which may not fit the glenoid in our study population. This fact may be taken into consideration while designing glenoid prostheses for the Indian population. Further, in this study glenoid cavities having the glenoid notch were recorded in higher percentage. This fact could be useful while evaluating lesions/defects of the glenoid cavity.