Abstract:

BACKGROUND: Usual mechanics experiment approach cannot be applied directly to human body and the inter-comparability of models is low. Therefore finite element numerical simulation to mechanical behavior of human body has become an effective method for better understanding of the human body.
OBJECTIVE: Based on computer simulation of unstable intertrochanteric fractures of femoral head replacement, to perform a stress analysis of the femur and prosthesis after replacement and to evaluate the initial stability of the prosthesis.
METHODS: Both lower extremities of the volunteers underwent thin CT scan to obtain data related to the femur. The image data were input into Mimics11.1 image processing software for image processing; then, the data were input into UG4.0 software for modeling. The Boolean calculation was performed between the prosthesis and the femur. There were two groups: normal joint replacement group and artificial joint replacement group. Material assignment, definition of contact, force load, and stress analysis were observed in the two groups.
RESULTS AND CONCLUSION: Artificial hip joint replacement changes the force trends; the stability of prosthesis for intertrochanteric fractures after joint replacement is good, and the artificial joint maintain stable under normal load.