Published Paper Details:

INTRODUCTION : Anterior shoulder dislocation frequently causes bone loss on the anterior aspect of the glenoid with fracture of the posterosuperior aspect of the humeral head, known as Hill-Sachs deformity. Glenoid bone loss decreases the glenohumeral contact area which increases joint instability and the possibility of further dislocation. Plain CT scan of the shoulder allows us to evaluate the glenoid cavity and its rim, and 3-D reconstruction allows both the radiologist and the surgeon to visualise the defect on a bony model. The evaluation helps the surgeon to select the most appropriate treatment. AIMS & OBJECTIVES: To determine the percentage of bone loss using 3 dimensional CT. To study degree of accuracy of preoperative CT imaging in relation to surgical intervention and findings. RESULTS & DISCUSSION In this study, indicators of bone loss was evaluated using 3-D CT only, as bone margins are easily identifiable with 3-D imaging. All the patients underwent CT scan with additional scanning of opposite shoulder joint for comparison. Patients were evaluated for Glenoid Index & percentage bone loss and were subsequently subjected to Arthroscopic surgery or Open Bankarts repair accordingly. In this study, most of the patients had right shoulder involvement (86.7%) compared to the left (13.3%). Out if 30 patients 8 patients had fracture of the interior glenoid. In our study of 30 patients, 11 patients(36.7%) were calculated to have a percentage bone loss of more than 25% and 19 patients(63.3%) had a loss of less than 25%. SUMMARY AND CONCLUSION To conclude, Glenoid index as calculated from the 3-D CT scan accurately predicted the surgery required to the surgery performed when compared retrospectively. The 3-D CT scan can therefore be used by surgeons as an additional diagnostic tool for preoperative planning and patient counseling.