Biceps Lasso Loop and Self- Locking Tenodesis Alongside Repair of Rotator Cuff Tears: Randomised Controlled Trial Study Protocol (BLAST 1)

Inclusion Criteria: * Rotator cuff tear: confirmed preoperative diagnosis of a non- traumatic, full- thickness tear of the supraspinatus and/or infraspinatus and/or subscapularis tendon, as evidenced by ultrasound, arthro- CT or MRI. * Language proficiency: sufficient to allow for communication during the informed consent process and for the completion of the study questionnaires. Exclusion Criteria: * Tear type: partial thickness rotator cuff tears are excluded. * Tear severity: individuals with massive or irreparable rotator cuff tears are excluded. * Fatty degeneration: presence of rotator cuff muscle fatty degeneration classified as Grade 4 according to the Goutallier system will result in exclusion. * Glenohumeral osteoarthritis: patients exhibiting glenohumeral osteoarthritis, defined radiographically by the presence of joint space narrowing or osteophytes on anteroposterior (radiographs of the affected shoulder) will be excluded. * Prior shoulder surgery: history of previous surgical intervention on the affected shoulder will result in exclusion. * Popeye sign: preoperative presence of the Popeye sign will result in exclusion. * Cognitive impairment: pre- existing dementia or any condition that impairs the ability to understand study procedures and complete questionnaires and assessments is an exclusion criterion. * Pregnant, parturient or breast-feeding patients. * Persons under legal protection (curatorship, guardianship, safeguard of justice). * Persons deprived of their liberty by judicial or administrative measure * Persons under psychiatric care * Persons not affiliated to a social security scheme