Bone extended by computer-aided

(57) [summary] software for designing an orthopedic surgical planning. This software is executed by the arithmetic processing unit of the computer, the processor, the process of defining the bone 3D (three-dimensional) template model of the patient, the plurality of digitized 2D of the patient's bone (two-dimensional) X a process of storing the line images in a computer storage device, a plurality of the process of extracting the 2D reference shape of the patient's bone from each of the digitized 2DX ray, the 3D template model using 2D reference shape of the patient's bone deformed by, to perform a process to minimize the error between the contour of the 3D template model deformed bone contours of a patient. Furthermore, the arithmetic processing unit, processing of generating a surgical plan for a patient's bone based and processing for reading the digital data associated with the modified 3D template model of the patient's bone, the analysis of the digital data associated with the deformation 3D model It is also performed.