A system and method by which an orthodontic appliance is automatically designed and manufactured from digital lower jaw and tooth shape data of a patient provides for preferably scanning a model of the patient's mouth to produce two or three dimensional images and digitizing contours and selected points....http://www.google.es/patents/US6616444?utm_source=gb-gplus-sharePatente US6616444 - Custom orthodontic appliance forming method and apparatus
Custom orthodontic appliance forming method and apparatus