Rotator cuff tear is one of the common injuries that cause shoulder pain in the elderly. After the rotator cuff tendon is injured, repairing the torn rotator cuff tendon through arthroscopic surgery is an effective treatment that is currently widely used. In the rotator cuff injury, irreparable rotator cuff injury is a difficult point in treatment, especially for patients with a long injury time, the obvious shrinkage of the injured tendon, muscle atrophy and steatosis may occur, all of which lead to the poor quality of the rotator cuff tendon needed to be repaired , Poor healing ability, seriously affecting the shoulder joint function and daily life of these patients. For this part of patients, arthroscopic partial repair of torn rotator cuffs is one of the commonly used methods. In addition, in recent years, superior capsular reconstruction has been gradually applied to the clinic and has achieved good clinical effects, but there are no controlled studies to compare Clinical effect of partial repair and superior capsular reconstruction on irreparable rotator cuff injury.

Inclusion Criteria:

• patients with Irreparable Rotator Cuff Tears
• underwent superior capsular reconstruction or partial repair
• at least two years follow-up

Exclusion Criteria:

• reparable Rotator Cuff Tears
• underwent reverse total shoulder arthroplasty