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Updated: Feb 10, 2026
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The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
Published on: August 4, 2022
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Dissociation of modular total hip arthroplasty at the neck-stem interface without dislocation
A Kouzelis1, C S Georgiou, P Megas
1Department of Orthopaedics and Traumatology, University Hospital of Patras, 26504, Rio, Patras, Greece. akouzelis@yahoo.gr
Summary
Dissociation of modular total hip arthroplasty (THA) at the femoral neck-stem interface is a rare complication. This case highlights the importance of surgeon awareness regarding potential early failures linked to modularity in hip implants.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Materials Science
Background:
- Modular total hip arthroplasty (THA) components are increasingly utilized in orthopedic surgery.
- While generally safe, complications specifically arising from the modularity itself are infrequently reported.
Observation:
- A case of dissociation occurred at the femoral neck-stem junction during ambulation in a patient with a modular THA.
- This event highlights a potential failure mode associated with the modular design of hip prostheses.
Findings:
- The dissociation was attributed to factors related to the modular interface between the femoral neck and stem.
- Surgical revision involving the replacement of modular neck components successfully treated the dissociation.
Implications:
- Surgeons utilizing modular hip implants must be cognizant of the risk of early complications stemming from modularity.
- Awareness of these specific failure modes is crucial for patient safety and optimal implant performance.
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