This is an observational study that involves subjects with full-thickness rotator cuff tears treated by means of arthroscopy surgical repair, also known as arthroscopic surgery. The primary objective of this study is to observe the timing and rate of tendon retear in those subjects.

Subjects will be recruited from each surgeon's surgical practice. They will be reviewed to assure they meet all eligibility criteria prior to enrolling them into the study.

Inclusion Criteria:

• Full thickness Rotator Cuff Tears ranging from 1cm to 4cm in size.
• Planned procedure for repair is tendon-to-bone repair by means of an arthroscopy

Exclusion Criteria:

• Previous surgical intervention to the shoulder joint understudy
• Tears of the subscapularis or labral pathology requiring surgical repair
• Shoulder instability either shoulder
• Unable to complete functional evaluations in either shoulder

Community Sample

Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical\_trials/trial\_data\_and\_results/data\_requests.