title: In vivo healthy knee kinematics during dynamic full flexion.
abstract: Healthy knee kinematics during dynamic full flexion were evaluated using 3D-to-2D model registration techniques. Continuous knee motions were recorded during full flexion in a lunge from 85° to 150°. Medial and lateral tibiofemoral contacts and femoral internal-external and varus-valgus rotations were analyzed as a function of knee flexion angle. The medial tibiofemoral contact translated anteroposteriorly, but remained on the center of the medial compartment. On the other hand, the lateral tibiofemoral contact translated posteriorly to the edge of the tibial surface at 150° flexion. The femur exhibited external and valgus rotation relative to the tibia over the entire activity and reached 30° external and 5° valgus rotations at 150° flexion. Kinematics' data during dynamic full flexion may provide important insight as to the designing of high-flexion total knee prostheses.
authors.affiliation: Department of Mechanical and Aerospace Engineering, University of Florida, 231 MAE-A Building, P.O. Box 116250, Gainesville, FL 32611-6250, USA. hamachan@ortho.med.kyushu-u.ac.jp
authors.forename: Satoshi
authors.initials: S
authors.lastname: Hamai
authors.forename: Taka-aki
authors.initials: TA
authors.lastname: Moro-oka
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Dunbar
authors.forename: Hiromasa
authors.initials: H
authors.lastname: Miura
authors.forename: Yukihide
authors.initials: Y
authors.lastname: Iwamoto
authors.forename: Scott A
authors.initials: SA
authors.lastname: Banks
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D005269:Femur / Q000033:anatomy & histology / Q000502:physiology; D006801:Humans; D007717:Knee / Q000033:anatomy & histology / Q000502:physiology; D007719:Knee Joint / Q000033:anatomy & histology* / Q000502:physiology; D008297:Male; D016059:Range of Motion, Articular; D013977:Tibia / Q000033:anatomy & histology / Q000502:physiology; D014965:X-Rays