DR. ROBERT PETTIT, MDBeacon Orthopaedics & Sports Medicine
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Shoulder Replacement: Anatomic & Reverse

Shoulder arthritis that grinds through your sleep and steals your reach doesn’t have to be permanent. Dr. Pettit performs both anatomic and reverse shoulder replacement — CT-planned for your anatomy — and chooses the design your shoulder actually needs.

ShoulderJoint ReplacementCT-Planned

Two designs, one decision that matters

An anatomic total shoulder resurfaces the ball and socket in their normal configuration — the right choice when the rotator cuff is intact. A reverse total shoulder swaps the ball and socket positions so the deltoid powers the arm — the design of choice when the rotator cuff is deficient, for cuff-tear arthropathy, and for many complex fractures. Choosing correctly is the surgeon’s job, and it starts with your cuff.

Shoulder arthritis and shoulder replacement patient infographic — Robert Pettit, MD
Patient infographic — click to open full size.

CT-based planning

Every shoulder replacement Dr. Pettit performs is planned from a pre-operative CT scan, which maps your bone anatomy and wear pattern in 3D so implant position and version are decided before surgery. The CT scan is a required part of your pre-surgical workup.

What surgery and early recovery look like

Surgery typically takes about two hours. Anatomic replacements protect the subscapularis repair early — a sling for four to six weeks with staged motion and no active internal rotation early on. Reverse replacements wear a sling for six weeks with dislocation precautions (no combined reaching behind the back) for twelve weeks, progressing from passive to active motion as the shoulder heals.

Results & expectations

Pain relief is the most reliable outcome — most patients sleep through the night again within weeks. Motion goals differ by design: anatomic shoulders commonly reach 140–150° of elevation; reverse shoulders typically achieve functional overhead motion of 80–120°+ with long-term lifting guidelines to protect the implant.

Frequently asked questions

How do I know if I need anatomic or reverse?

Your rotator cuff decides. Intact cuff plus arthritis favors anatomic; a deficient cuff, cuff-tear arthropathy, or certain fractures favor reverse. The exam, MRI/CT, and Dr. Pettit’s assessment determine the recommendation.

How long is the sling worn?

Anatomic: four to six weeks. Reverse: six weeks, with no driving during that period. Both come off for prescribed home exercises.

What are the long-term restrictions?

Reverse shoulders carry commonsense lifetime guidelines — commonly around 15 lb below shoulder height and 10 lb overhead, avoiding repetitive heavy loading like push-ups and bench press. Anatomic shoulders have fewer limits once healed.

When can I golf again?

Many patients return to golf around four months after anatomic replacement, and to modified recreation after reverse replacement per the protocol milestones.

This page is for patient education and does not replace personalized medical advice. Every patient is different — treatment decisions are made together at your visit.