Abstract:Objective To explore the numerical changes of five methods of measuring coracoid process morphology and to determine which indexes are the most significant in judging the subscapular tendon injury caused by coracoid impingement and provide reference for clinical diagnosis.Methods The clinical data of 100 patients with subscapular tendon injury were collected and examined by MRI.There were 42 male and 58 female patients.The injury were found in 52 left shoulder and 48 right shoulder,with the injury grade 0 in 22 cases,grade 1 in 36 cases,grade 2 in 23 cases,grade 3 in 19 cases).The coracoid-humeral distanc(CH),the coracoid index(CI),the angle between coracoid body and joint pelvis(A1),the angle between coracoid neck and articular pelvis(A2),and the angle between coracoid neck and coracoid were measured(A3).Results The P values of each group were calculated respectively(α=0.05),CH:P=0.000,with statistical significance;CI:P=0.259,no statistical significance;A1:P=0.018,no statistical significance;A2:P=0.007,with statistical signi-ficance;A3:P=0.000,with statistical significance.Conclusion The morphological changes of coracoid process can lead to coracoid process impingement to some extent,and eventually lead to subscapular tendon injury.