Glenohumeral instability and rotator cuff tear

Area of Science:

• Orthopedic Surgery
• Sports Medicine
• Biomechanical Engineering

Background:

• Rotator cuff tears increase with age post-dislocation, linked to tendon aging.
• Rotator cuff tendons stabilize the glenohumeral joint by compressing the humeral head.
• The causal relationship between capsular-labrum lesions and rotator cuff tears in dislocations is unclear.

Purpose of the Study:

• To investigate the relationship between age, rotator cuff tears, and shoulder dislocations.
• To explore the biomechanical implications of rotator cuff integrity in joint stability.
• To review management strategies for shoulder dislocations with associated rotator cuff injuries.

Main Methods:

• Literature review of studies on shoulder dislocations and rotator cuff pathology.
• Analysis of age-related changes in rotator cuff tendon properties.
• Evaluation of diagnostic challenges in determining injury causality.
• Review of conservative and surgical treatment outcomes.

Main Results:

• Advancing age correlates with higher rotator cuff tear prevalence after traumatic dislocation.
• Age-associated tendon deterioration compromises rotator cuff function and joint stability.
• The "terrible triad" of the shoulder involves nerve or brachial plexus injury alongside tendon lesions and instability.
• Treatment decisions require consideration of patient age, functional needs, and injury severity.

Conclusions:

• Age-related rotator cuff changes are a significant factor in post-dislocation tears.
• Accurate diagnosis of the primary injury (capsular-labrum vs. rotator cuff) in dislocations remains challenging.
• Personalized management, balancing conservative and surgical options, is crucial for optimal outcomes in shoulder dislocation patients.