title: In vivo kinematic analysis of cruciate-retaining total knee arthroplasty during weight-bearing and non-weight-bearing deep knee bending.
abstract: The purpose of the present study was to evaluate the in vivo kinematics of the posterior cruciate ligament-retaining total knee arthroplasty during weight-bearing and non-weight-bearing deep knee bending and compare these 2 different conditions. We evaluated the in vivo kinematics of the knee using fluoroscopy and femorotibial translation relative to the tibia tray by 2-dimensional/3-dimensional registration. In the weight-bearing state, the femoral component showed central pivot and bicondylar posterior rollback pattern. During non-weight-bearing, the movement anteriorly occurred on both the medial and lateral side during early flexion, whereas bicondylar femoral component rollback occurred after that. During non-weight-bearing, both the medial and lateral condyle significantly moved anteriorly compared with the weight-bearing state during early flexion. However, bicondylar femoral rollback occurred under both these conditions.
authors.affiliation: Department of Orthopaedic Surgery, Nagano Matsushiro General Hospital, Nagano, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Horiuchi
authors.forename: Shaw
authors.initials: S
authors.lastname: Akizuki
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Tomita
authors.forename: Kazuomi
authors.initials: K
authors.lastname: Sugamoto
authors.forename: Takaharu
authors.initials: T
authors.lastname: Yamazaki
authors.forename: Norimasa
authors.initials: N
authors.lastname: Shimizu
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000601:surgery*; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D001696:Biomechanical Phenomena; D005260:Female; D005471:Fluoroscopy; D006801:Humans; D007719:Knee Joint / Q000502:physiology* / Q000601:surgery; D007720:Knee Prosthesis; D008297:Male; D009068:Movement / Q000502:physiology; D020370:Osteoarthritis, Knee / Q000601:surgery*; D016119:Posterior Cruciate Ligament / Q000601:surgery*; D011187:Posture / Q000502:physiology; D016059:Range of Motion, Articular / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology