title: Analysis of weight-bearing kinematics of posterior-stabilized total knee arthroplasty with novel helical post-cam design.
abstract: We developed a new posterior-stabilized total knee arthroplasty (TKA) with a unique post-cam design that induces and accommodates internal tibial rotation with deep knee flexion. To validate the design concept of this system, we conducted an image analysis study employing a computer-aided diagnosis system for 24 TKA-implanted knees. In the analysis, the tibiofemoral relationship in the following 3 postures was evaluated: standing at extension, forward lunge, and kneeling with maximum knee flexion. The results of the image analysis showed achievement of consistent internal rotation of the tibia in deep flexion with a broad contact area at the post-cam interface as intended by the original design concept of this TKA system.
authors: Department of Orthopaedic Surgery, Hyogo College of Medicine, Nishinomiya, Hyogo, Japan.
authors: Yohei
authors: Y
authors: Tsumori
authors: Shinichi
authors: S
authors: Yoshiya
authors: Masahiro
authors: M
authors: Kurosaka
authors: Shoji
authors: S
authors: Kobashi
authors: Nao
authors: N
authors: Shibanuma
authors: Motoi
authors: M
authors: Yamaguchi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000295:instrumentation*; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000502:physiology* / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D011187:Posture; D011474:Prosthesis Design; D011859:Radiography; D016059:Range of Motion, Articular / Q000502:physiology*; D015203:Reproducibility of Results; D012189:Retrospective Studies; D016474:Weight-Bearing / Q000502:physiology