Influence of microscopic machining grooves on the wear behavior of UHMWPE tibial insert in virgin knee prosthesis

• Cho Changhee

  Department of Mechanical Systems Engineering, Faculty of Environmental Engineering, The University of Kitakyushu

• Murakami Teruo

  Research Center for Advanced Biomechanics, Kyushu University

• Sawae Yoshinori

  Department of Mechanical Engineering, Faculty of Engineering, Kyushu University

抄録

Ultra-high molecular weight polyethylene (UHMWPE) is the sole polymeric material currently used for weight-bearing surfaces in total joint arthroplasty. However, the wear phenomenon of UHMWPE in knee and hip prostheses after total joint arthroplasty is one of the major restriction factors on the longevity of these implants. In the microscopic surface observation of the virgin knee prosthesis, microscopic machining grooves caused by the machining process were observed on the surface of the UHMWPE tibial insert. The authors focused on the machining grooves as a factor influencing the wear mechanism of UHMWPE. The 3D microscopic surface profile measurement and reproduction of the surface of the UHMWPE tibial insert were performed to produce finite element models of the machining grooves based on actual measurement data. Elasto-plastic finite element contact analyses between UHMWPE microscopic surface model with machining grooves and the metallic femoral component were also performed to investigate the mechanical state and wear behavior of UHMWPE surface zone with the machining grooves. The analytical findings of this study suggest that the machining grooves of the UHMWPE tibial insert are one of the important factors influencing the microscopic failure and/or microscopic wear behavior of the UHMWPE tibial insert in the knee prosthesis after total knee replacement.

収録刊行物

• Transactions of the Materials Research Society of Japan

  Transactions of the Materials Research Society of Japan 40 (2), 129-132, 2015

  一般社団法人 日本MRS

キーワード

• Ultra-high molecular weight polyethylene (UHMWPE)
• Tibial insert
• Machining grooves
• Contact analysis
• Finite element method (FEM)

詳細情報

• CRID: 1390001205513857408
• NII論文ID: 130005089529
• DOI: 10.14723/tmrsj.40.129
• ISSN: 21881650
• ISSN: 13823469
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可