Finite element analysis for the insertion process of the press-fitted total hip arthroplasty
There are more than 300,000 total hip arthroplasty (THA) surgeries performed every year in the United States. Press-fitted artificial hip joints are wildly used for relatively young patients. It relies on the friction resistance to relative motion at the bone-implant interface to allow bone ingrowth and primary stability. Interference fit and friction coefficient are two important factors during the insertion process that can directly influence the stability of the implants. The three-dimensional dynamic model was evaluated using finite element method to simulate the insertion process of the stem prosthesis. Different values of interference fit (from 0.1 to 0.5 mm) and friction coefficients (from 0.3 to 0.5) were considered.