The present invention relates to a system of preparing a one of a kind artificial or biological implant to repair or replace a bone or a tissue part in a living individual, the system comprising: pre-operatively constructing an anatomically correct, affected area 7-unique scan implants geometry, wherein the implants geometry is unknown before the acquisition of the individual's data; and using a process derived from rapid prototyping to construct a geometrically and anatomically correct duplication of the functional attributes of the bone or tissue part to be replaced from the dataset created by scans of the recipients scans. This system can also be used to modify, pre-operatively, existing FDA approved implants.