Painful or Failed Shoulder Replacement and Revision Surgery

Why can a shoulder replacement become painful?

A shoulder replacement may initially work well and later become painful, or it may never provide the expected improvement. Possible causes include loosening of the glenoid or humeral component, instability or dislocation, rotator cuff or deltoid dysfunction, infection, fracture around the implant, implant wear or breakage, stiffness, bone loss, nerve injury, or component malposition. Pain may also originate from the cervical spine, surrounding muscles, or another condition that is not corrected by revision surgery. The pattern and timing of symptoms matter. Sudden pain after a fall suggests a different problem than gradual pain many years after surgery. Persistent pain from the beginning raises different questions than pain that returns after a period of good function.

A diagnosis-first revision evaluation

Dr. Knudsen begins by reconstructing the complete history of the shoulder. Helpful records include the original operative report, implant information, prior X-rays, CT or MRI studies, infection workup, therapy records, and a timeline of symptoms. Missing records should not prevent consultation, but prior imaging often reveals how the implant and surrounding bone have changed. The examination evaluates active and passive motion, strength, stability, deltoid and rotator cuff function, nerve function, and possible pain from the neck. New X-rays are obtained. CT imaging can define component position, fixation, bone loss, fracture healing, and areas available for reconstruction. Laboratory studies and joint aspiration may be needed even when fever, drainage, and redness are absent.

Treatment options

Not every painful replacement requires another operation. Selected problems may be managed with observation, rehabilitation, medication, treatment of stiffness, or care directed at a cervical or neurologic source. Revision surgery must address the specific mechanism of failure. Options may include removal or exchange of one or more components, conversion from an anatomic replacement or hemiarthroplasty to reverse replacement, repair or reconstruction of damaged soft tissues, fixation of a periprosthetic fracture, bone grafting, use of augmented or specialized revision components, and staged or single-stage treatment when infection is present. Some cases require customized solutions because conventional fixation is no longer possible.

Advanced 3D planning for revision reconstruction

Revision surgery frequently involves altered anatomy, retained implants, scar tissue, bone loss, deformity, and limited areas for secure fixation. Dr. Knudsen uses CT-based three-dimensional planning to define the mechanical problem and build a patient-specific strategy before surgery. The plan can include methods for implant removal, preservation of remaining bone, reconstruction of the socket or humerus, and selection of revision components. Augmented- and mixed-reality applications can provide intraoperative access to this plan and support precise execution. The technology is used alongside infection evaluation, surgical judgment, and contingency planning because unexpected findings can still require the strategy to change.

Recovery, risks, and urgent symptoms

Revision shoulder replacement is generally more complex than the original procedure and carries greater risks. Recovery may take longer, and full function cannot always be restored. Potential complications include infection, instability, fracture, nerve injury, stiffness, persistent pain, implant loosening, and the need for additional surgery. Prompt evaluation is important for drainage, increasing redness or swelling, fever, sudden deformity, dislocation, rapidly worsening pain, or inability to use the arm after a fall. These symptoms may indicate infection, fracture, or mechanical failure that should not wait for a routine visit.

Selected References

1. Burns DM, et al. Assessment of a painful shoulder arthroplasty. J Clin Orthop Trauma. 2025.
2. Expert Panel on Musculoskeletal Imaging. ACR Appropriateness Criteria Imaging After Shoulder Arthroplasty: Updated 2026. J Am Coll Radiol. 2026;23(8):1717-1737.
3. Garrigues GE, Zmistowski B, Cooper AM, Green A; ICM Shoulder Group. Proceedings from the 2018 International Consensus Meeting on Orthopedic Infections: evaluation of periprosthetic shoulder infection. J Shoulder Elbow Surg. 2019;28(6S):S32-S66.
4. Harrison AK, Knudsen ML, Braman JP. Hemiarthroplasty and Total Shoulder Arthroplasty Conversion to Reverse Total Shoulder Arthroplasty. Curr Rev Musculoskelet Med. 2020;13(4):501-508.

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