Anatomic measurements of the coracoid and its implication in the Latarjet procedure

Abstract

Background: Latarjet procedure is frequently done to treat shoulder instability. It includes osteotomizing the coracoid distal to the insertion of coracoclavicular ligament. Knowledge of the insertion of the trapezoid ligament is important to determine the level of coracoid osteotomy. Methods: Ten shoulders were dissected free of overlying soft tissue while preserving the ligament and muscle attachment on the coracoid. The distance between the tip of the coracoid to the coracoclavicular ligament and the pectoralis minor insertion width on the coracoid was measured. Result: The average distance from the tip of the coracoid to the trapezoid insertion was 2.6 cm. The average pectoralis minor insertion width was 1.9 cm. Conclusion: To preserve the insertion of the trapezoid ligament, the coracoid should be osteotomized less than 2.6 cm from the tip of the coracoid.