In Vivo Stress Distribution of the Knee Ligaments During Functional Activities
Date Issued
2008
Date
2008
Author(s)
Lin, Yu-Tse
Abstract
The knee is the important joint in the human body. The mobility and stability of the knee joint are controlled by a complex interaction among force-bearing structures in knee. Knowledge of the mechanical interaction of the knee joint would aid the cause and the clinician in design of a suitable rehabilitation program for the ligaments injury of the knee. The objective of this study was to calculation of in vivo the stress distribution and the force of the knee ligaments through the use of a 3-D finite element method of the ligaments during the functional activities of knee. The ligaments of the knee were simulated as incompressible isotropic homogeneous and isotropic hyperelastic materials. The mechanical properties of ligaments were validated by specimen experiments which were performed by laxity test using 6-degree robotic system. In clinical application, the dynamic pose of the femur and tibia can be obtained through 3-D surface model to 2-D fluoroscopy image registration for the boundary condition of FEA. The study had developed an intact knee ligament modeling procedure. Then it can be applied to the subject-specific knee and overcome the difficulty of current knee joint studies.
Subjects
knee joint
3-D knee ligament models
finite element method
functional activities
ligaments stress
Type
thesis
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