Continuous Sagittal Radiological Evaluation of Stair-Climbing in Cruciate-Retaining and Posterior-Stabilized Total Knee Arthroplasties Using Image-Matching Techniques

Satoshi Hamai, Ken Okazaki, Takeshi Shimoto, Hiroyuki Nakahara, Hidehiko Higaki, Yukihide Iwamoto

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

In this study, we evaluated the in vivo kinematics of stair-climbing after posterior stabilized (PS) and cruciate retaining (CR) total knee arthroplasty (TKA) using radiographic-based image-matching techniques. Mid-flexion anteroposterior stability was demonstrated in all knees after CR TKA. However, paradoxical femoral translation at low flexion angles was seen in both designs. The post-cam mechanism did not function after PS TKA. Larger posterior tibial slope in PS TKA was linked to forward sliding of the femur at mid-flexion and unintended anterior tibial post impingement at knee extension. CR TKA is more sagittally stable in mid-flexion during stair climbing and attention must be given to minimize posterior tibial slope when using late cam-post engaging PS TKA designs.

Original languageEnglish
Pages (from-to)864-869
Number of pages6
JournalJournal of Arthroplasty
Volume30
Issue number5
DOIs
Publication statusPublished - May 1 2015

All Science Journal Classification (ASJC) codes

  • Orthopedics and Sports Medicine

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