Abstract:

BACKGROUND: At present, few researches have reported the effect mechanism of IIizarov technique in orthopedic disorders limb lengthening and joint contracture external fixation device by finite element analysis.
OBJECTIVE: To analyze the effect mechanism of Ilizarov technique in deformity correction device for elbow and knee flexion extension contracture by three-dimensional finite element analysis.
METHODS: The joint contracture correction device based on the human body biomechanical properties which can be widely applied to clinical treatment was established by IIizarov biological theory. The mechanical effect and scientificity of Ilizarov technique in the designing of the deformity correction device for elbow and knee flexion extension contracture were analyzed by three-dimensional finite element.
RESULTS AND CONCLUSION: A three-dimensional finite element model of elbow and knee joints with realistic appearance and full biomechanical properties were established. The mechanical indexes, such as the elastic modulus and Poisson’s ratio of the bone and soft tissue were calculated through the three-dimensional finite element model and the mechanical analysis. Joint internal and external stress-strain distribution and changes were analyzed through imposing load on the joint contracture correction device. Ilizarov technique can provide the theory basis for the designing and optimizing deformity correction device for elbow and knee flexion extension contracture, and the finite element mechanics analysis reveals the biomechanical change mechanism of elbow and knee flexion contracture lesions organizational structure.