Dr. Kenneth Cutbush | Posterior Labral Tear

Описание: Posterior Labral Tear & Posterior Shoulder Instability Explained | Dr Kenneth Cutbush Reviews MRI, CT & Surgical Recommendation

In this video, Dr Kenneth Cutbush, Orthopaedic Shoulder Surgeon in Brisbane, presents a rare and interesting case of posterior shoulder instability caused by a posterior labral tear. While 80–90% of shoulder instability cases are anterior, posterior instability is far less common and often associated with significant bone loss and traumatic shoulder events.

Dr Cutbush walks through the patient’s MRI arthrogram, showing the dye-filled joint, rotator cuff anatomy, and the distinct posterior labral tear visible as a white line separating the labrum from the glenoid rim. He then reviews a 3D CT reconstruction, revealing substantial posterior glenoid bone loss—approximately 25%—as well as a reverse Hill-Sachs lesion, indicating the humeral head impacted the posterior glenoid during the dislocation.

This combination of posterior labral tearing, bone loss and humeral head impression fracture has resulted in recurrent instability. Based on imaging and clinical findings, Dr Cutbush explains why this patient requires an arthroscopic posterior bone block procedure combined with posterior labral repair to restore stability and prevent further dislocations.

What this video covers:
– What a posterior labral tear looks like on MRI arthrogram
– How posterior shoulder instability differs from anterior instability
– Understanding 3D CT reconstruction and posterior glenoid bone loss
– What a reverse Hill-Sachs lesion is and how it forms
– Why posterior instability is rare but often more complex
– How much bone loss indicates the need for surgical stabilisation
– When an arthroscopic posterior bone block is recommended
– How labral repair restores shoulder stability

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