Rheumatoid arthritis is the leading cause of disability in young adults. Total knee arthroplasty has been successfully used to restore\nthe joint function. Due to small bone size, osteoporosis, and severe soft tissue disease, standard knee implant sometimes cannot\nbe directly applied clinically and patient-specific designs may be a more rational choice.The purpose of this study was to evaluate\nthe biomechanical behavior of a patient-specific knee implant. A three-dimensional finite element of total knee arthroplasty was\ndeveloped. The mechanical strength and the wear damage of the articular surfaces were analyzed. The results show that there exist\nhigh risks of component fracture and wear damage; the proposed implant design should be abandoned.The presurgery analysis is\nhelpful in avoiding the potential failure.
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