Abstract
There is a current trend to propose cementless total joint arthroplasty (TJA) to younger patients. These patients have more demanding physical activity resulting in an increased failure rate of the implants. In particular for these type of patients, the desired service life of the implant should be extended. The actual implant used do not fulfil this requirement. In this study, a new concept of orthopaedic implant is presented where the implant is not only a structural support but also a local drug delivery system. The delivered drug is meant to influence the bone remodeling in a way so as to compensate the effects of peri-implant osteolysis. To test this concept, we extended an existing bone remodeling model to include the effect of a drug. The results show that a more homogeneous bone density distribution can be obtained around the implant. Implants used as drug delivery systems could then be an alternative way to increase implant service life.
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