Fig. 1

a Observation from the posterolateral portal of the right shoulder. Grade 2 coracoacromial ligament degeneration was confirmed. b The acromion and the coracoacromial ligaments were removed using a chisel
a Observation from the posterolateral portal of the right shoulder. Grade 2 coracoacromial ligament degeneration was confirmed. b The acromion and the coracoacromial ligaments were removed using a chisel