Finite element analysis and cadaveric experiments to investigate the fixation of two types of implants with different interference fit. Total Knee Arthroplasty (TKA) is the most common and successful surgical procedure for a diseased knee joint, offering pain relief and improvement of knee function, and providing a better quality of life for patients. The surgery involves the removal of damaged cartilage and bone, then the TKA components are implanted in the knee. The cementless implants fixation depends on the difference between the internal cuts of the bones and the implant dimensions, which creates an interference fit.
Ideally, a higher interference should provide a better fixation, however, it could also cause bone abrasion and permanent deformation during implantation. Therefore, in this study finite element analysis and cadaveric experiments will be performed to investigate the fixation of two types of implants with different interference fit during two loading conditions by measuring the displacement of the implant relative to the bone (also known as micromotions) at the bone-implant interface.