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Femoral component revision using an extensively hydroxyapatite-coated stem
Charles H Crawford1, Charles H Crawford, Arthur L Malkani
1University of Louisville School of Medicnine, Kentucky 40292, USA.
The Journal of Arthroplasty
|January 13, 2004
Summary
Extensively hydroxyapatite (HA)-coated stems in femoral revision surgery show good clinical outcomes and low failure rates. Most patients experienced no stress shielding, suggesting HA coating is a viable option for hip revision.
Area of Science:
- Orthopedic Surgery
- Biomaterials Science
- Implant Technology
Background:
- Femoral component revision is a complex orthopedic procedure.
- Extensively coated stems aim to improve bone integration and reduce revision failure.
- Stress shielding remains a concern with some implant designs.
Purpose of the Study:
- To evaluate the clinical outcomes of extensively hydroxyapatite (HA)-coated stems in femoral component revision.
- To assess the incidence of stress shielding and mechanical failure rates.
- To compare HA-coated stems with extensively porous-coated stems.
Main Methods:
- Retrospective review of 59 patients undergoing femoral component revision.
- Utilized extensively HA-coated stems.
- Follow-up averaged 3.3 years.
- Assessed Harris Hip Score, mechanical failure, and stress shielding.
Main Results:
- Significant improvement in Harris Hip Score from 43 to 86 (P < .01).
- Overall mechanical failure rate was 2%.
- 78% of patients showed no evidence of stress shielding.
- Clinical results were comparable to extensively porous-coated stems.
Conclusions:
- Extensively HA-coated stems demonstrate promising clinical results for femoral revision.
- Low failure rates and minimal stress shielding observed in this cohort.
- Long-term studies are needed to definitively compare HA-coated with porous-coated stems regarding stress shielding.