Abstract

Objective: Anatomic details and variations of shoulder region are important for diagnosis and management of corrective surgeries in this area. Acromion morphology is believed to play a key role in impingement syndrome and the pathogenesis of rotator cuff diseases. The present study was carried out with the purpose to collect the morphological data of acromion process in Indian population and to compare it with similar studies in other population. Experimental approach: We studied 127 dry scapulae of unknown age and sex. Acromion processes were classified into Type I (flat), II (curved) and III (hooked). The length, breadth, anterior thickness, coraco-acromial distance, acromion-glenoid distance and the height of coraco-acromial arch was measured with the help of digital vernier caliper. The inclination of acromion was measured with the help of goniometer. Findings and Discussion: Type II acromion was observed in majority (81.88%), type I in 13.3% and type III in 4.7%. Mean coraco-acomial distance was 26.9 ± 5.6 mm while mean acromio-glenoid distance was 22.68 ± 3.3 mm. Mean height of coraco-acromial arch was 16.54 ± 2.8 mm. The inclination of acromion was less on the right side as compared to the left side (Rt. -33.46 0, Lt.- 43.40 ). Conclusion: Predominance of Type II acromion and bilateral symmetry in all other parameters was observed. When the results were compared with similar studies, differences were observed in most of the parameters. The results of the present study may be of help to the shoulder surgeons, Anthropologists and Anatomists.

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