Greater Tuberosity Avulsion Fracture Rehabilitation: Rotator Cuff Preservation Protocols

Greater tuberosity avulsion fractures represent isolated injuries of the proximal humerus, commonly occurring alongside anterior glenohumeral dislocations or as a consequence of direct impaction against the acromion during falls. The greater tuberosity serves as the anatomical insertion site for the superior and posterior rotator cuff tendons: the supraspinatus, infraspinatus, and teres minor. In young active individuals or overhead workers, displacement greater than 3 to 5 millimeters warrants open reduction and internal fixation (ORIF) with suture anchors or low-profile plates to prevent superior tuberosity migration and chronic subacromial impingement. Non-displaced or minimally displaced patterns are managed non-operatively in an abduction sling. Physiotherapy must balance early passive joint lubrication with strict protection of the healing tendon-bone junction against aggressive active abduction.

Domestic and Cultural Indian Realities

Everyday Indian household routines frequently impose involuntary rotator cuff activation. Lifting heavy brass cooking pots (kadai), handling 5-litre pressure cookers, or hauling water buckets (balti) requires powerful rotator cuff co-contraction that pulls directly across the healing tuberosity; these tasks must be delegated for at least 8 to 12 weeks. Reaching overhead to ring temple bells, retrieve steel containers from high kitchen shelves, or hang wet laundry on elevated clotheslines triggers subacromial friction; all activities should be relocated to waist or chest height. Fastening traditional saree blouses behind the back forces extreme internal rotation and extension, stretching the infraspinatus footprint; patients should switch to front-buttoning garments. Commuting in shared autorickshaws or crowded suburban local trains exposes the arm to sudden jerks; patients must wear their supportive sling during all transit.

Clinical Biomechanics and Anatomical Healing

The greater tuberosity forms the lateral border of the bicipital groove and acts as the mechanical lever for the posterosuperior rotator cuff. When the supraspinatus contracts, it compresses the humeral head into the glenoid fossa while initiating abduction. If an avulsed tuberosity fragment heals with superior displacement greater than 5mm, it mechanically blocks the humerus from passing beneath the coracoacromial arch during arm elevation, causing permanent loss of abduction. Passive forward flexion in the scapular plane (scaption: 30 degrees anterior to the coronal plane) produces minimal tension across the supraspinatus footprint compared to pure coronal plane abduction. Early active-assisted motion must avoid active external rotation and resisted abduction until periosteal bridging callus stabilizes the fragment.

Validated Special Tests and Differential Diagnosis

Clinical evaluation includes gentle palpation over the greater tuberosity just inferior to the anterolateral acromion. External rotation lag sign and the Empty Can test evaluate infraspinatus and supraspinatus functional integrity, but are deferred during acute healing to prevent displacement. Axillary radiographs and axillary nerve sensory testing over the lateral deltoid patch rule out co-existing nerve injury. Differential diagnosis distinguishes true bony avulsion from full-thickness rotator cuff tears and calcific tendinitis using dedicated ultrasound or MRI.

Stage-by-Stage Functional Recovery Protocol

Phase 1 (Weeks 0 to 3) immobilises the shoulder in a sling (or 15-degree abduction pillow), permitting active elbow, wrist, and hand exercises, along with gentle Codman pendulum swings. Phase 2 (Weeks 3 to 6) introduces passive forward scaption up to 90 degrees using a cane or pulley, accompanied by gentle passive external rotation limited to 20 degrees. Phase 3 (Weeks 6 to 12) progresses to active-assisted and active unassisted overhead reach, submaximal isometric rotator cuff sets, and dynamic scapular stabilization exercises once radiographic union is verified.

Red Flags and Urgent Surgical Indicators

Seek immediate orthopaedic assessment if follow-up X-rays show progressive superior displacement of the tuberosity fragment, indicating secondary displacement that requires surgical reduction. Loss of sensation over the lateral shoulder badge area indicates axillary nerve compromise. Inability to actively raise the arm past 90 degrees after 12 weeks, accompanied by severe subacromial clicking, suggests mechanical bony impingement.

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