METHOD FOR DESIGNING A BONE MORPHOLOGY BASED HIP SYSTEM

摘要

A method of designing a group of femoral implants from three-dimensional images of femurs from a patient population greater than 100. A boundary between cortical and cancellous bone is defined in each of the images. A longitudinal axis of the femur is defined centered within the boundary. The width of the boundary is measured in a direction perpendicular to the axis at multiple cross-sections along the longitudinal axis spaced less than 20 mm. At least five (5) different size implants for implantation in a noncortical bone area of the femur are designed based on the measured widths. At least one area of the proximal femoral component boundary is designed where the implant outer surface is sized to be within 2 mm of the cortical bone. The proximal dimensions of the at least five implants are sized to provide the fit within 2 mm in 95% of the femurs from the population.