ObjectiveTo evaluate multi-slice CT (MSCT) in glenoid bone loss of patients with recurrent anterior shoulder dislocation.Methods MSCT findings of 108 patients with recurrent anterior shoulder dislocation and 12 with single anterior shoulder dislocation were retrospectively studied.The incidence,degrees and locations of glenoid bone losses were recorded.The incidence was analyzed with Fisher exact test.The maximum length,depth and proportion were compared with Wilcoxon rank sum test.ResultsGlenoid bone loss was detected in 91.7％ (99/108)patients with recurrent anterior shoulder dislocation.The proportion of glenoid bone loss was ( 16.0 ± 6.0)％,and the central locations of glenoid bone loss were from 2: 20 to 4: 25 ( mean 3: 20).Sixty-two percent (67/108) patients had bony Bankart lesions in which 58.2％ (39/67) bony fragments were free and 41.8％ (28/67) were adherent to the anterior border of the glenoid cavity.Seventy-five percent (9/12) patients with single shoulder dislocation had anterior glenoid bone loss,and the proportion of glenoid bone loss was ( 15.2 ± 7.1 ) ％.There were no statistical differences of the incidence (P =0.100) and proportion of glenoid bone loss ( P =0.453 ) between the recurrent and single anterior shoulder dislocation.ConclusionsAnterior glenoid bone loss is common in patients with recurrent anterior shoulder dislocation.