Kinematic analysis of kneeling in cruciate-retaining and posterior-stabilized total knee arthroplasties

Satoshi Hamai, Hiromasa Miura, Hidehiko Higaki, Shuichi Matsuda, Takeshi Shimoto, Kousuke Sasaki, Masaaki Yoshizumi, Ken Okazaki, Nobuaki Tsukamoto, Yukihide Iwamoto

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Kneeling is an important function of the knee for many activities of daily living. In this study, we evaluated the in vivo kinematics of kneeling after total knee arthroplasty (TKA) using radiographic based image-matching techniques. Kneeling from 90 to 120° of knee flexion produced a posterior femoral rollback after both cruciate-retaining and posterior-stabilized TKA. It could be assumed that the posterior cruciate ligament and the post-cam mechanism were functioning. The posterior-stabilized TKA design had contact regions located far posterior on the tibial insert in comparison to the cruciate-retaining TKA. Specifically, the lateral femoral condyle in posterior-stabilized TKA translated to the posterior edge of the tibial surface, although there was no finding of subluxation. After posterior-stabilized TKA, the contact position of the post-cam translated to the posterior medial corner of the post with external rotation of the femoral component. Because edge loading can induce accelerated polyethylene wear, the configuration of the post-cam mechanism should be designed to provide a larger contact area when the femoral component rotates.

Original languageEnglish
Pages (from-to)435-442
Number of pages8
JournalJournal of Orthopaedic Research
Volume26
Issue number4
DOIs
Publication statusPublished - Apr 2008

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

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