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

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...

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Veröffentlicht in:The Journal of arthroplasty 2015-05, Vol.30 (5), p.864-869
Hauptverfasser: Hamai, Satoshi, M.D., Ph.D, Okazaki, Ken, M.D., Ph.D, Shimoto, Takeshi, Ph.D, Nakahara, Hiroyuki, M.D., Ph.D, Higaki, Hidehiko, Ph.D, Iwamoto, Yukihide, M.D., Ph.D
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Sprache:eng
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Zusammenfassung: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.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2014.12.027