Comparison of 10-year clinical wear of annealed and remelted highly cross-linked polyethylene: A propensity-matched cohort study

Satoshi Hamai, Yasuharu Nakashima, Naohiko Mashima, Takuaki Yamamoto, Tomomi Kamada, Goro Motomura, Hiroshi Imai, Jun ichi Fukushi, Hiromasa Miura, Yukihide Iwamoto

研究成果: Contribution to journalArticle査読

11 被引用数 (Scopus)

抄録

No previous studies comparing the clinical wear rates of the two different kinds of cross-linked ultra-high-molecular-weight polyethylene (XLPE), annealed and remelted, are available. We compared the creep and steady wear rates of 36 matched pairs (72 hips in total) adjusting for baseline characteristics with propensity score matching techniques. Zirconia femoral heads with 26-mm diameter were used in all cases. The femoral-head cup penetration was measured digitally on radiographs. Significantly greater creep ( p=0.006) was detected in the remelted (0.234 mm) than annealed (0.159 mm) XLPE. However, no significant difference ( p=0.19) was found between the steady wear rates (0.003 and 0.008 mm/year, respectively) of the annealed and remelted XLPE. Multiple regression analyses showed that remelted XLPE is significant independent variable ( p<0.001) that is positively associated with creep. However, the patient age and body weight, cup size, the liner thickness, cup inclination, follow-up periods, and postoperative Merle d'Aubigné hip score had no significant effects ( p>0.05) on the steady wear rates. No patients exhibited above the osteolysis threshold of 0.1 mm/year, progressive radiolucencies, osteolysis, or polyethylene fracture. This[U+3000]propensity-matched cohort study document no significant difference in wear resistant performances of annealed and remelted XLPE over an average period of 10 years.

本文言語英語
ページ(範囲)99-107
ページ数9
ジャーナルJournal of the Mechanical Behavior of Biomedical Materials
59
DOI
出版ステータス出版済み - 6 1 2016

All Science Journal Classification (ASJC) codes

  • 生体材料
  • 生体医工学
  • 材料力学

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