A Novel Method for Assessment of Polyethylene Liner Wear in Radiopaque Tantalum Acetabular Cups: Clinical Validation in Patients Enrolled in a Randomized Controlled Trial.
rct · Level II
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- Record sourced from PubMed, PMID 26216229.
- Also identified by DOI 10.1016/j.arth.2015.06.050.
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Abstract
Conventional radiostereometric analysis (RSA) for wear is not possible in patients with tantalum cups. We propose a novel method for wear analysis in tantalum cups. Wear was assessed by gold standard RSA and the novel method in total hip arthroplasty patients enrolled in a randomized controlled trial receiving either titanium or tantalum cups (n=46). The novel method estimated the center of the head using a model based on identification of two proximal markers on the stem and knowledge of the stem/head configuration. The novel method was able to demonstrate a pattern of wear that was similar to the gold standard in titanium cups. The novel method offered accurate assessment and is a viable solution for assessment of wear in studies with tantalum cups.
Medical subject headings
- Arthroplasty, Replacement, Hip
- Biocompatible Materials
- Hip Prosthesis
- Polyethylene
- Prosthesis Failure
- Tantalum
Anatomy
- hip