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OVERVIEW
Shoulder replacement surgery aims to relieve severe pain and restore functional movement in patients with end-stage joint disease. The shoulder is a ball-and-socket joint comprising the head of the upper arm bone (humerus [upper arm bone]) and the shallow socket of the shoulder blade (glenoid [shoulder socket]). When articular cartilage degenerates due to disease or injury, bone-on-bone friction creates incapacitating pain and severe functional restriction.
The central mechanism of arthroplasty involves resecting damaged articular cartilage and subchondral bone, followed by the anchoring of biometric metal and medical-grade polyethylene implant components. Orthopedic surgeons select specific surgical approaches based on individual rotator cuff tendon status, structural bone stock, and underlying pathology.
PROCEDURE
The procedure begins with patient positioning in a modified beach-chair or supine stance under combined general anesthesia and interscalene brachial plexus block. An anterior deltopectoral surgical incision is made to access the shoulder joint. The surgeon carefully mobilizes surrounding nerves and soft tissues. The damaged humeral head is resected at a precise angle, and the medullary canal is prepared with specialized reamers. If the socket is replaced, the glenoid surface is smoothed and fitted with a high-density polyethylene component secured with bone cement or press-fit pegs. The humeral stem and modular metallic head (or reverse glenosphere/humeral cup construct) are inserted and tested for range of motion, stability, and soft tissue tension. The joint is thoroughly irrigated, repair of subscapularis tendon or soft tissues is completed, surgical drains are placed if required, and the incision is closed in layers.
BENEFITS
Evidence-based clinical outcomes following shoulder arthroplasty demonstrate major patient benefits across several functional domains:
- Significant reduction in chronic joint pain, including persistent night pain that disrupts sleep.
- Restoration of functional arm elevation and rotation, enabling independence in daily activities.
- Improved joint stability and elimination of painful mechanical grinding or catching sensations.
- High rates of long-term implant survival and sustained functional durability.
- Reduction or complete elimination of reliance on chronic analgesic or anti-inflammatory medications.
RECOVERY
Recovery from shoulder replacement follows a multi-phase rehabilitation schedule designed to balance soft tissue healing with joint mobility:
- Phase 1 (Weeks 0–6): Continuous sling immobilization except during physical therapy. Focus on passive range of motion, pendulum exercises, and protecting surgical repairs.
- Phase 2 (Weeks 6–12): Discontinuation of sling. Initiation of active-assisted and active movement without resistance. Focus on restoring overhead reach.
- Phase 3 (Months 3–6): Progressive resistance exercises to strengthen deltoid and scapular musculature. Return to light functional daily tasks.
- Phase 4 (Months 6–12): Advanced conditioning, full integration into daily activities, and non-contact recreational sports.
WHAT WE TREAT
Shoulder replacement is clinically indicated for several severe degenerative, inflammatory, and traumatic conditions of the glenohumeral joint, including:
- Osteoarthritis (degenerative joint disease) causing severe articular cartilage destruction.
- Rotator cuff tear arthropathy (joint degeneration caused by chronic, massive muscle tears).
- Rheumatoid arthritis (systemic inflammatory joint disease) destroying cartilage and subchondral bone.
- Avascular necrosis (bone tissue death due to loss of blood supply) of the humeral head.
- Post-traumatic arthritis (joint degeneration following severe fractures or dislocations).
- Severe complex proximal humeral fractures that cannot be reconstructed with internal hardware.
PREPARATION
Pre-operative preparation requires a comprehensive medical evaluation including cardiac clearance, blood tests, and electrocardiogram (ECG). Radiological imaging includes plain radiographs and computed tomography (CT) scans to evaluate 3D bone morphology and glenoid bone stock. Patients must stop specific blood-thinning medications, non-steroidal anti-inflammatory drugs (NSAIDs), and certain immunosuppressive agents under medical supervision prior to surgery. Dental clearing is required to eliminate potential systemic bacterial sources that could infect the implant. Home safety planning, skin cleansing protocols with chlorhexidine wash, and fasting from midnight prior to the surgical procedure are standard requirements.
RISKS
Complications are categorized by frequency and severity. Common short-term side effects include transient surgical site pain, local swelling, hematoma formation, and temporary stiffness. Less common complications include wound infection, nerve irritation (most commonly involving the axillary nerve causing temporary numbness or weakness), deep vein thrombosis (DVT), and intraoperative bone fracture. Rare but severe complications include joint dislocation, deep prosthetic joint infection requiring hardware removal, component loosening over time, periprosthetic fracture, and systemic anesthesia risks such as cardiovascular or pulmonary events.
JOURNEY
The clinical care pathway for shoulder replacement begins with pre-operative medical clearance, physical assessment, and advanced imaging. On the day of surgery, the patient receives regional nerve blockade and general anesthesia. The surgical procedure typically requires two to three hours. Post-operative care begins in a specialized recovery unit with immediate focus on pain management and soft tissue protection.
Inpatient hospitalization typically lasts one to two days. Physical therapy initiates within 24 hours post-surgery with gentle passive movements. The rehabilitation timeline spans several months, progressing systematically from sling immobilization to active-assisted motion, muscle strengthening, and ultimate functional recovery over 6 to 12 months.
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