Abstract
Fracture in the femur, particularly around the femoral head and neck region, is one of the complications of hip arthroplasty. In this study, femoral fractures in two types of hip arthroplasy, total hip (THA) and resurfacing (RHA), was compared. The two implants were fitted into a three-dimensional bone model created from CT scans of a 54-year old male. Finite element method was used to observe the stress and fracture distributions. The results indicated that tensile fracture dominates THA, while compressive fracture is more prominent in RHA. Furthermore, fractures in RHA appear earlier than in THA. Equivalent stress analysis indicates that the stress distribution of RHA is comparable to that of THA, the difference being it covering the proximal region of the femur.
