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Research Paper | Medical Science | India | Volume 12 Issue 2, February 2023 | Rating: 4.4 / 10
Morphological Variations in Columns of Scapula & Reverse Total Shoulder Arthroplasty
Dr. Yunis Parveiz Malik | Dr. Parvaiz Ahmad Lone | Dr. Shamima Banoo
Abstract: The three column concept for glenoid base - plate fixation in Reverse Total Shoulder Arthroplasty, which include the base of the Coracoid process, the scapular spine and the lateral border of scapula, provide good basis for screw fixation. However there exists a significant variability in the morphology of these three columns which can affect the outcome of the procedure and also the screw trajectory for each column, therefore knowledge of the shape is critically important for designing and fixation of prosthesis. For instance fractures of scapular spine after Reverse total Shoulder Arthroplasty is not uncommon. The purpose of this study was to classify scapular spine and coracoid process, and also morphometry of relevant geometrical parameters. A total of 100 dry scapulae, 46 left and 54 right, of unknown age and sex were obtained and classified based on morphological characteristics of scapular spine and coracoid process. Total of five morphometric parameters were chosen, three for scapular spine and two for coracoid process. As for scapular spine, total of five types were noted, type 1 (fusiform shape) was found to be 58%, type 2 (slender rod shape) 7%, type 3 (thick rod shape) 13%, type 4 (wooden club shape) 3% and type 5 (horizontal S - shape) 19%. Furthermore Type 2 and 5 of scapular spines were much thinner than the other types. As for coracoid process three morphological types were found. Type 1 (vertical ?8? shaped) 45%, type 2 (long stick) 16% and type 3 (short stick) 39% with no significant statistical difference between the types 1, 2 and 3. The present study revealed anatomical variance of scapular spine and coracoid process and we presume that scapular spine types 2 and 5 may show poor surgical outcome.
Keywords: Reverse Total Shoulder Arthroplasty, Three column concept, morphology of scapular spine, morphology of coracoid process
Edition: Volume 12 Issue 2, February 2023,
Pages: 962 - 966