The purpose of this study was to randomly classify the upper third of the subscapularis in 1/2 of the rupture patients as preoperative group (arthroscopic and arthroscopic debridement group) and the difference between clinical and clinical scores.

The degree of rupture that is an adaptation of arthroscopic surgery is now known to be about one-third to one-half of a rupture. However, the most controversial case is the one-third to one-half of the upper tear attached to the tendinous portion of the subscapularis. Currently, debridement or repair is under way. But evidence-based studies are lacking and no clear treatment guidelines are available.

Inclusion Criteria:

• Subscapularis tendon tear from more than 1/2 to entire of 1st facet found during routine arthroscopy with 70 degree scope
• Isolated or combined with Supraspinatus and/or Infraspinatus tear (SS/IS tear less than 3 cm)
• Combined biceps lesion
• Combined acromial clavicle (AC) arthritis

Exclusion Criteria:

• Revision case or previous surgical history of the index shoulder
• Any open surgery, including open repair of the subscapularis tendon
• Compensation case
• Combined severe arthritis of the glenohumeral joint
• Patient who selects one's own surgical method, i.e. not randomized
• Infection, tumor, etc