Observation of short-and medium-term clinical efficacy for arthroscopic treatment of subscapularis tears
Objective To observe the short-and medium-term clinical efficacy for arthroscopic treatment of subscapularis tears.Methods Eighty-six patients who underwent arthroscopic treatment of subscapularis tears from October 2017 to December 2021 were retrospectively analyzed.Clinical findings were assessed preoperatively and at the last follow-up,including the active range of motion,the visual analog scale(VAS)score for pain,the Constant score,the American Shoulder and Elbow Surgeons(ASES)score,the Belly-press test,and the Bear-hug test.Subscapularis muscle strength by using of the Bear-hug test were compared in both shoulders at the last follow-up.All patients underwent magnetic resonance imaging(MRI)at least 6 months after surgery to evaluate structural integrity of the repaired tendon.Results The mean follow-up period was(29.8±8.2)months.At last follow-up,the mean active range of motion,the mean VAS score,the mean Constant score,and the mean ASES score significantly improved,and the positive rate of the Belly-press test and the Bear-hug test significantly decreased(All P<0.001).Subscapularis strength was 88.0%of the contralateral shoulder.MRI evaluation showed the subscapularis rerupture rate of 9.3%.Arthroscopic debridement and repair were both effective in treating Lafosse type Ⅰ tear,and one patient progressed to Lafosse type Ⅲ tear in the debridement group.The rerupture rate of single row and double row repair for Lafosse type Ⅲ and above tears were 22.2%and 15.4%,respectively,with no statistical difference(P = 0.683).Conclusions The short-and medium-term clinical efficacy for arthroscopic treatment of subscapularis tears is satisfactory.Arthroscopic repair is preferred for Lafosse type Ⅰ tears.Arthroscopic single row and double row repair for Lafosse type Ⅲ-Ⅳ subscapularis tears yield high tendon healing rate.However,arthroscopic repair for Lafosse type Ⅴ tears should be cautious.