A method of designing, presenting, generating, and fabricating custom implants by obtaining a 3D image of a site to receive an implant, simulating volumetric changes of the site, generating a virtual 3D implant, and fabricating a real 3D implant. A method of implanting a custom implant in a patient, by obtaining a 3D image of a site to receive an implant, simulating volumetric changes of the site, generating a virtual 3D implant, fabricating a real 3D implant, and implanting the implant in the patient. A method of correcting disfigurement in a patient. A method of replacing a disc in a patient's back. The present invention also provides for an implant fabricated by this method.