A new approach to knee joint arthroplasty

The main aim of this new approach dedicated to knee arthroplasty is to provide an automated method for determining the cutting planes of both the head of femur and the head of tibia in knee replacement surgery. This paper shows a new approach differing from standard procedures associated with manual determination of the mechanical axis of the lower extremity (during surgery) and replacing them with a procedure based on the imprints (with selected cutting planes) of the two heads of bones. Both these imprints have been performed on the basis of the toposcan of the lower limb (before surgery). This methodology has been implemented in MATLAB and tested in clinical CT images of the lower limb in the coronal and transverse planes (61 studies) and in clinical MRI studies of the knee joint in coronal plane (107 studies). Correct results were obtained for about 90% cases.

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