| Second-generation highly cross-linked X3™ polyethylene wear: a preliminary radiostereometric analysis study. | |
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MedLine Citation:
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PMID: 20151231 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: First-generation highly cross-linked polyethylene liners have reduced the incidence of wear particle-induced osteolysis. However, failed acetabular liners have shown evidence of surface cracking, mechanical failure, and oxidative damage. This has led to the development of second-generation highly cross-linked polyethylene, which has improved wear and mechanical properties and resistance to oxidation in vitro. Owing to its recent introduction, there are no publications describing its clinical performance. QUESTIONS/PURPOSES: We assessed early clinical wear of a second-generation highly cross-linked polyethylene liner and compared its clinical performance with the published results of hip simulator tests and with first-generation highly cross-linked polyethylene annealed liners. PATIENTS AND METHODS: Twenty-one patients were enrolled in a prospective cohort study. Clinical outcome and femoral head penetration were measured for 19 patients at 6 months and 1 and 2 years postoperatively. RESULTS: The median proximal head penetration was 0.009 mm and 0.024 mm at 1 and 2 years, respectively. The median two-dimensional (2-D) head penetration was 0.083 mm and 0.060 mm at 1 and 2 years, respectively. The median proximal wear rate between 1 and 2 years was 0.015 mm/year. CONCLUSIONS: The wear rate calculated was similar to the in vitro wear rate reported for this material; however, it was less than the detection threshold for this technique. Although longer followup is required for wear to reach a clinically quantifiable level, this low level of wear is encouraging for the future clinical performance of this material. LEVEL OF EVIDENCE: Level IV, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence. |
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Authors:
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David G Campbell; John R Field; Stuart A Callary |
Publication Detail:
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Type: Journal Article Date: 2010-02-12 |
Journal Detail:
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Title: Clinical orthopaedics and related research Volume: 468 ISSN: 1528-1132 ISO Abbreviation: Clin. Orthop. Relat. Res. Publication Date: 2010 Oct |
Date Detail:
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Created Date: 2010-09-15 Completed Date: 2010-10-04 Revised Date: 2012-04-27 |
Medline Journal Info:
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Nlm Unique ID: 0075674 Medline TA: Clin Orthop Relat Res Country: United States |
Other Details:
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Languages: eng Pagination: 2704-9 Citation Subset: AIM; IM |
Affiliation:
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Wakefield Orthopaedic Clinic, 270 Wakefield Street, Adelaide, SA, 5000, Australia. hipknee@tpg.com.au |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aged Arthroplasty, Replacement, Hip / adverse effects, instrumentation* Female Gamma Rays Hip Joint / physiopathology, radiography, surgery* Hip Prosthesis* Humans Male Middle Aged Osteoarthritis, Hip / physiopathology, radiography, surgery* Polyethylene / radiation effects Prospective Studies Prosthesis Design Prosthesis Failure Range of Motion, Articular Recovery of Function South Australia Stress, Mechanical Surface Properties Time Factors Treatment Outcome |
| Chemical | |
Reg. No./Substance:
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9002-88-4/Polyethylene |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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