Fig. 1
From: Analysis of the bony geometry of the acromio-clavicular joint
3D illustration of the acromion angle and the clavicle angle. The acromion angle describes the angle between the cranial surface of the acromion and the tangent to its articular surface (a), the clavicle angle describes the corresponding angle between the cranial surface of the clavicle and the tangent to its articular surface (b)