关键词: Segmental defects of the acetabular rim, Bone grafting, Finite element analysis method, Structure optimization, Revision total hip arthroplasty ,

Abstract: The study aimed to develop effi cient techniques with diff erent novel graft structures to enhance the treatment of acetabular bone defi ciency. The inhomogeneous material properties Finite Element Analysis (FEA) model was reconstructed according to computed tomography images based on a healthy patient without any peri-acetabular bony defect according to the American Academy of Orthopedic Surgeons (AAOS). The FEA model of acetabular bone defi ciency was performed to simulate and evaluate the mechanical performances of the grafts in diff erent geometric structures, with the use of fi xation implants (screws), along with the stress distribution and the relative micromotion of graft models. The stress distribution mainly concentrated on the region of contact of the screws and superolateral bone. Among the diff erent structures, the mortise–tenone structure provided better relative micromotion, with suitable biomechanical property even without the use of screws. The novel grafting structures could provide suffi cient biomechanical stability and bone remodeling, and the mortise–tenone structure is the optimal treatment option for acetabulum reconstruction. 

Key words: Segmental defects of the acetabular rim, Bone grafting, Finite element analysis method, Structure optimization, Revision total hip arthroplasty