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The Use of Mixed Reality in Custom-Made Revision Hip Arthroplasty: A First Case Report
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Bone support of a custom triflange acetabular component over time
Erim Özdemir1, Bram de Lange1, Constantinus F M Buckens2
1Department of Orthopedics, Radboud University Medical Center, Nijmegen, Netherlands.
The Bone & Joint Journal
|March 31, 2024
Summary
Bone development around custom triflange acetabular components (CTACs) increased over two years, but remained low. This suggests CTACs may not require bulky scaffolds, potentially reducing costs and improving fit.
Area of Science:
- Orthopedic surgery
- Biomaterials science
- Radiology
Background:
- Revision total hip arthroplasty (THA) often requires specialized implants.
- Custom triflange acetabular components (CTACs) are used in complex hip reconstructions.
- Understanding bone integration with implant scaffolds is crucial for long-term success.
Purpose of the Study:
- To evaluate bone development around CTAC scaffolds over time.
- To quantify changes in scaffold-bone contact area and distance post-implantation.
- To assess the clinical implications of scaffold bone integration in revision THA.
Main Methods:
- A single-centre historical prospective cohort study of 18 patients undergoing revision THA with CTACs.
- CT scans were performed immediately postoperatively and at least one year later.
- 3D models were used to analyze scaffold-bone contact area and distance.
Main Results:
- Mean scaffold-bone contact area increased from 16% to 28% over a mean of two years.
- Mean scaffold-bone distance decreased from 6.5 mm to 5.5 mm.
- All implants remained stable without revision or radiological loosening.
Conclusions:
- A statistically significant increase in scaffold-bone contact occurred, but overall contact remained low.
- The contribution of the scaffold to implant stability, relative to screws, requires further investigation.
- Eliminating the scaffold component could reduce costs and optimize implant fit.
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