Method of designing patient-specific implant and guidance, and program and apparatus therefor

An apparatus for designing an implant and a guidance specific to a patent, the apparatus comprising:

• an input/output interface, a memory in which an instruction is stored, and a processor,
• wherein the processor is configured to, in connection with the memory,
• specify a first skeletal image of a skeleton of a patient in which an affected region to which an implant is to be implanted is located;
• specify a second skeletal image of another region skeleton including the implant;
• calculate a number of at least one implant matching the first skeletal image;
• cut the second skeletal image according to the calculated number of implants such that the at least one implant matches the first skeletal image, and display the cut second skeletal image;
• and
• display the cut at least one implant to be overlaid on the first skeletal image.