SHOULDER · TREATMENT DECISIONS
Anatomic vs Reverse Shoulder Replacement
How rotator cuff function, bone loss and activity goals guide shoulder arthroplasty.
The Rotator Cuff Is Central to the Choice
Anatomic total shoulder arthroplasty (TSA) recreates the usual ball-and-socket arrangement. Reverse TSA switches their positions, allowing the deltoid muscle to do more of the work of lifting the arm. The best option depends on rotator cuff function, socket bone loss, diagnosis and your goals—not age alone.
[1][2]| Factor | Anatomic TSA | Reverse TSA |
|---|---|---|
| Rotator cuff | Usually favored for arthritis when the cuff is intact and functional. | Often used when a large, irreparable cuff tear prevents reliable shoulder function. |
| Arthritis pattern | A common choice for primary arthritis with a working cuff and a reconstructable socket. | Often appropriate for cuff tear arthropathy; may also suit arthritis with severe socket deformity or bone loss. |
| Other situations | Selected patients in whom the joint can be reliably reconstructed anatomically. | May be used for complex proximal humerus fractures or certain failed previous replacements. |
| Muscle dependence | Relies on a functioning cuff to keep the joint balanced. | Relies heavily on a functioning deltoid and its nerve supply. |
When Is Anatomic Replacement a Good Fit?
For painful arthritis with a functional rotator cuff, anatomic replacement can restore the joint surfaces while retaining the shoulder’s usual mechanics. The quality of the cuff and the socket bone both matter. A cuff that fails later can compromise function, so the recommendation considers its likely durability as well as its current appearance.
[1]When Does Reverse Replacement Make More Sense?
Reverse replacement is often preferred when arthritis accompanies an irreparable cuff tear or when cuff deficiency makes an anatomic implant unreliable. It can also help selected patients with complex fractures or a failed prior replacement. It depends on the deltoid to move the arm; severe deltoid or nerve dysfunction changes the options.
[2]Can Reverse TSA Be Right with an Intact Cuff?
Yes. Severe socket wear, bone loss or deformity may make a reverse implant appropriate even when the cuff is intact. AAOS appropriate-use criteria address this specific situation and consider age, activity demands, shoulder elevation and the pattern of socket deformity. CT imaging may help plan bone reconstruction and implant position.
[3]Age Informs the Discussion; It Does Not Decide It
A younger patient’s long-term implant needs and an older patient’s cuff quality may influence the recommendation. But a birthday is not a substitute for examining the shoulder. Discuss the activities you value, expected rotation and lifting ability, implant longevity and the possibility of future surgery.
Both operations involve risks such as infection, instability, fracture and implant problems. Neither guarantees normal motion or unrestricted lifting. Recovery and activity guidance should reflect the particular implant, soft-tissue healing and your function.
[1][2]Questions to Bring to Your Visit
- Is my rotator cuff strong enough for an anatomic replacement?
- How much socket bone loss do I have?
- How would each implant affect the activities that matter most to me?
Sources & Further Reading
Evidence checked October 3, 2026. General education; recommendations depend on an individual evaluation.