Complex shoulder condition
Rotator cuff tear arthropathy
Arthritis and altered shoulder mechanics caused by a large, long-standing rotator cuff tear.
A massive chronic rotator cuff tear can allow the ball to migrate upward and wear the joint in an abnormal pattern. The result may be pain, weakness, grinding, and an inability to raise the arm. Treatment is individualized; not everyone with this diagnosis needs replacement surgery.
See the anatomy and imaging
Why the joint changes
The rotator cuff normally centers the humeral head in the socket. When a large tear is no longer repairable, the deltoid pulls the ball upward. Over time, this can damage cartilage and reshape the ball, socket, and acromion.
Evaluation
The examination compares active and passive motion, cuff strength, deltoid function, nerve function, and the neck. X-rays often show upward migration and arthritis. CT helps define bone loss and implant planning; MRI or ultrasound may show which cuff muscles remain functional.
Nonsurgical options
- Adjust painful activities while maintaining safe motion
- Pain or anti-inflammatory medication when appropriate
- Therapy that emphasizes deltoid and remaining shoulder muscle function
- An injection in selected patients for temporary symptom relief
Reverse shoulder replacement
When pain and loss of function remain unacceptable, reverse shoulder replacement may be considered. The implant changes shoulder mechanics so the deltoid can lift the arm with less reliance on the damaged cuff. Bone, deltoid and nerve function, infection risk, health, and goals all matter.
Other options
In selected patients without advanced arthritis, partial cuff repair, tendon transfer, or other reconstruction may be discussed. Once cuff-tear arthropathy is established, the amount of cartilage wear and deformity often makes reverse replacement the more predictable reconstructive option.
Expected recovery
After reverse replacement, a sling and activity limits protect healing tissues. Motion is restored in stages, followed by strengthening. Pain relief is usually the primary goal; final motion and strength depend on deltoid function, bone, prior surgery, and preoperative stiffness.
Evidence and further reading
- AAOS OrthoInfo: Reverse Total Shoulder Replacement
- AAOS OrthoInfo: Rotator Cuff Tears
- Open-access review: Rotator Cuff Tear Arthropathy
Educational content is reviewed for patient clarity and is not a substitute for an examination or individualized medical advice.
PIA Shoulder MD