Abstract:

BACKGROUND: Alternative components provided several advantages for acetabular revision, but it is paramount to the success of the revision surgery to reconstruct acetabulum. It is necessary to analyze stress distribution before acetabular revision to better prosthesis design.
OBJECTIVE: To establish and explore the finite element model of acetabulum in the presence of bone loss. 
METHODS: The finite-element models of normal acetabulum and the acetabulum with bone loss were established to calculate the stresses during a normal gait cycle with use of the finite-element analysis.
RESULTS AND CONCLUSION: Results of finite-element analysis demonstrated that the peak stress was tested at the superolateral rim. The study indicated increased stresses with an increased hip force and orientation. The stress of cup consisted of a main superolateral stress and a minor stress pointing to pubis. While the transferring direction of stress changed from anterosuperior rim to posterosuperior rim in acetabulum in the presence of bone loss. This study demonstrated that this finite-element technique seemed to be a viable means of exploring stress of acetabulum in the presence of bone loss and improving the design of component for acetabular revision.