Shoulder biomechanics in normal and selected pathological conditions

Area of Science:

• Orthopedic Surgery
• Sports Medicine
• Biomechanics

Background:

• Glenohumeral joint stability is maintained by soft tissues, bone morphology, and dynamic stabilizers like the rotator cuff and biceps tendon.
• Shoulder stabilization encompasses anatomic (labral repair, bone restoration) and non-anatomic (remplissage, tendon transfers) techniques.

Purpose of the Study:

• To review current shoulder stabilization and rotator cuff repair techniques.
• To emphasize the importance of anatomic restoration and biomechanically favorable environments for healing.
• To highlight rehabilitation strategies for balanced force couples and preventing secondary impingement.

Main Methods:

• Review of existing literature on shoulder stabilization and rotator cuff repair.
• Discussion of various surgical techniques, including anatomic and non-anatomic options.
• Emphasis on biomechanical principles in rehabilitation and surgical outcomes.

Main Results:

• Anatomic rotator cuff repair aims to restore cuff anatomy and the rotator cable while respecting the coracoacromial arch.
• Tendon transfers, superior capsular reconstruction, and balloon implantation are options for irreparable rotator cuff lesions.
• Successful rehabilitation requires balanced glenohumeral and scapular force couples to prevent humeral head migration and impingement.

Conclusions:

• Achieving an anatomic and biomechanically sound rotator cuff repair is crucial for tendon healing.
• Rehabilitation plays a vital role in restoring shoulder function and preventing complications.
• A comprehensive approach combining surgical technique and rehabilitation optimizes glenohumeral joint stability.