In vivo kinematics of the knee during weight bearing high flexion

JOURNAL OF BIOMECHANICS

卷:46

Article

Qi, Wei^1,2  Hosseini, Ali¹  Tsai, Tsung-Yuan¹  Li, Jing-Sheng¹  Rubash, Harry E.¹  Li, Guoan¹ 

[1] Harvard Univ, Sch Med, Massachusetts Gen Hosp, Bioengn Lab,Dept Orthopaed Surg, Boston, MA 02114 USA

[2] Chinese Peoples Liberat Army Gen Hosp, Dept Orthopaed Surg, Beijing 100853, Peoples R China

关键词: In vivo knee kinematics;    Cartilage contact;    High flexion;   

DOI  :  10.1016/j.jbiomech.2013.03.014

来源: Elsevier

【 摘 要 】

Achieving high flexion is an objective of contemporary total knee arthoplasty; however little is known on the knee biomechanics at high flexion under weight-bearing conditions. This study investigates the 6DOF kinematics and tibiofemoral cartilage contact biomechanics of the knee during weight-bearing flexion from full extension to maximal flexion. Eight knees from seven healthy subjects with no history of injuries or chronic pain were recruited. The knees were MRI scanned to create 3D models of the tibia and femur, including their articular cartilage surfaces. The subjects were then imaged using a dual fluoroscopic image system while performing a weight-bearing quasi-static single-legged lunge from full extension to maximal flexion. The 6DOF kinematics and the articular cartilage contact locations were measured along the flexion path of the knee. The result indicated that the internal tibial rotation increased sharply at low flexion angles (full extension to 30 degrees), maintained a small variation in the middle range of flexion (30-120 degrees, and then sharply increased again at high flexion angles (120 degrees to maximal flexion). The contact point moved similarly in the medial and lateral compartments before 120 degrees of flexion, but less on the medial compartment at high flexion angles. The results indicated that the knee motion could not be described using one character in the entire range of flexion, especially in high flexion. The knee kinematic data in the entire range of flexion of the knee could be instrumental for designing new knee prostheses to achieve physical high flexion and improving rehabilitation protocols after knee injuries. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

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