To explore the related factors and the treatment result of rotator cuff tear with delamination.

The clinical data of 155 patients with rotator cuff injury at the Department of Orthopedics of Shanghai Pudong Hospital from February 2016 to July 2019 were retrospectively analyzed. The causes of injury, duration of disease, presence or absence of rotator cuff spallation, size of crack, type of spallation and Constant score before and after operation were collected. The measurement data of different groups were compared by one-way ANOVA and t test, the categorical data were compared by chi-square test, and the Spearman’s correlation analysis was performed.

All the patients were followed up for(15±5)months on average. Among the 155 patients, 73 cases were accompanied with delamination and 82 cases without delamination. Among the patients with rotator cuff tear smaller than 1 cm, delamination rate was 41.2%, while the rate was 77.1% among the patients with rotator cuff tear larger than 3 cm (P=0.003). Among the patients with subacromial impact, 60.6% of them were combined with delamination, while this ratio was 35.7% among the patients without acromial impact (P=0.002). The spallation was positively correlated with the size and impact of crack, and the differences were statistically significant (r=0.679, 0.603, both P<0.001). There was no statistical correlation between disease history or trauma and delamination (P>0.05). All the patients achieved good treatment results, and Constant score was significantly improved compared with that before surgery (t=30.047, P<0.01).

The incidence of rotator cuff delamination is high, and the occurrence of delamination is related to the size of tear and whether it is accompanied by subacromial impact. There is no correlation between delamination and trauma or the duration of disease. For rotator cuff tear with delamination, reasonable surgical techniques can be used to treat rotator cuff injury, a better effect can be obtained.