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Late detachment modular femoral component after primary total hip replacement
T N Karaismailoglu1, Y Tomak, B Gulman
1Ondokuz Mayis University Faculty of Medicine, Orthopaedics and Traumatology Department, Kurupelit-Samsun, Turkey.
Archives of Orthopaedic and Trauma Surgery
|September 12, 2001
Summary
A modular hip replacement unexpectedly dislocated three years post-surgery. This case highlights the risks of component separation in total hip arthroplasty, even years after implantation.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Materials Science
Background:
- Modular components in total hip replacement offer surgical flexibility.
- These components are widely used in primary and revision hip arthroplasty.
- Potential risks include component dissociation and matching errors.
Observation:
- A patient experienced separation of the modular femoral head from the stem.
- This event occurred three years after primary total hip replacement surgery.
- The separation happened during a routine activity, rising from a chair.
Findings:
- The study reports an unusually late dislocation of a primary modular total hip replacement.
- This late dissociation suggests potential long-term risks associated with modularity.
- The femoral head separated from the stem within the acetabular socket.
Implications:
- This case underscores the importance of careful component selection and surgical technique.
- Long-term monitoring for potential dissociation in modular hip implants may be warranted.
- Further research into the biomechanics and failure modes of modular hip components is needed.