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Second-generation uncemented total hip arthroplasty: a minimum 20-year follow-up
Jeffrey R McLaughlin1, Kyla R Lee2, Mary Ann Johnson1
1Kennedy Center, Oshkosh, Wisconsin, USA.
Bone & Joint Open
|February 4, 2021
Summary
Second-generation uncemented total hip arthroplasty showed excellent long-term results. Femoral components had 100% survival, and acetabular components demonstrated over 90% survival at 25 years.
Area of Science:
- Orthopedic surgery
- Biomaterials science
- Clinical outcomes research
Background:
- Long-term data on uncemented total hip arthroplasty (THA) is crucial for understanding device longevity.
- Previous studies have reported outcomes for first-generation uncemented THA, necessitating comparison with newer designs.
Purpose of the Study:
- To evaluate the clinical and radiological outcomes of a second-generation uncemented THA at a minimum 20-year follow-up.
- To compare these long-term results with previously published data on a first-generation uncemented THA.
Main Methods:
- A cohort of 62 uncemented THAs using Taperloc femoral components and T-Tap ST acetabular components was analyzed.
- Clinical and radiological follow-up was conducted for a minimum of 20 years, assessing component retention, revision, and functional scores.
- Survival analysis was performed with revision for aseptic loosening as the endpoint.
Main Results:
- Femoral component survival was 100% at 25 years, with no revisions for aseptic loosening.
- Acetabular component survival was 95% at 25 years, with revisions primarily due to aseptic loosening (5 cases).
- Mean Harris Hip Score improved significantly from 46 preoperatively to 89 postoperatively.
Conclusions:
- Second-generation uncemented THA, specifically the Taperloc femoral and T-Tap ST acetabular components, demonstrated excellent long-term durability.
- The low rate of aseptic loosening for femoral components and high survival rate for acetabular components suggest favorable performance of this uncemented THA design.
