Application of Novel Design Bone Grafting for Treatment of Segmental Acetabular Rim Defects During Revision Total Hip Arthroplasty

The study aimed to develop efficient techniques with different novel graft structures to enhance the treatment of acetabular bone deficiency. 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 deficiency was performed to simulate and evaluate the mechanical performances of the grafts in different geometric structures, with the use of fixation 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 different 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 sufficient biomechanical stability and bone remodeling, and the mortise-tenone structure is the optimal treatment option for acetabulum reconstruction.