Contact analysis of UHMWPE tibial component based on geometrical measurement for retrieved knee prosthesis

Changhee Cho, Teruo Murakami, Yoshinori Sawae, Nobuo Sakai, Hiromasa Miura, Tsutomu Kawano, Yukihide Iwamoto

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

The wear phenomenon of ultra-high molecular weight polyethylene (UHMWPE) in the knee and hip prostheses is one of the major restriction factors on the longevity of these implants. Especially in retrieved knee prostheses with anatomical design, the most predominant types of wear on UHMWPE tibial components are pitting and delamination. These fatigue wear of UHMWPE are believed to result from the repeated plastic deformation due to high contact stresses. In this study, elasto-plastic contact analysis of the UHMWPE tibial component based on geometrical measurement for retrieved knee prosthesis was performed using FEM to investigate the plastic deformation behavior in the UHMWPE tibial component. The results suggest that the maximum plastic strain below the surface is closely related to the subsurface crack initiation and delamination of the UHMWPE tibial component. The worn surface with improved geometrical congruity showed lower contact stress.

本文言語英語
ページ(範囲)1284-1290
ページ数7
ジャーナルNippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
68
4
DOI
出版ステータス出版済み - 4 2002

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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