MORPHOMETRY OF GLENOID FOSSA IN ADULT EGYPTIAN SCAPULAE

Background: Knowledge of normal variations in shape and size of the glenoid fossa are required to improve efficacy and minimize failure rates in shoulder arthroplasty, particularly those involving the glenoid component of shoulder joint. Studies concerning glenoid morphometry among Egyptian population are scarce. The objective of the present study was to determine morphological types and diameters of glenoid fossa in adult Egyptian scapulae . Material and methods: A total of 68 dry adult unpaired scapulae of unknown age and sex were randomly selected. The shape and diameters of glenoid fossa in each specimen were recorded and collected data were statistically analyzed. Results : Glenoid fossa revealed a superior - inferior diameter of 3.31 ± 0.39 and 2.87 ± 0.41 centimeters and an anterior - posterior diameter of 2.44 ± 0.44 and 2.21 ± 0.44 centimeters on the right and left sides respectively. The anterior margin of glenoid fossa presented a notch in 76.47% of studied scapulae, and accordingly the fossa was classified into three morphological types; pear-shaped (45.59%), inverted comma-shaped (30.88%) and oval ? shaped (23.53%). Conclusion : The documented findings about glenoid fossa in the present study would help to decide the proper size of glenoid component in shoulder arthroplasty among Egyptians. Moreover, approximately one third of Egyptians are liable to Bankart lesion.