Apparatus for taking odontological or medical impressions
Method of making a prosthesis, especially a dental prosthesis
Method and apparatus for the three-dimensional registration and display of prepared teeth
Process of making artificial teeth Patent #: 4964770
ApplicationNo. 155134 filed on 11/22/1993
US Classes:433/213Preliminary casting, model, or trial denture
ExaminersPrimary: O'Connor, Cary E.
Attorney, Agent or Firm
International ClassA61C 011/00
AbstractA three-dimensional model of the teeth of a patient is prepared by taking molded impressions of the mandibular and maxillar teeth, placing separately the impressions on a support table define an X-Y plane and detecting the Z distance from a probe by directing a beam of laser light onto the impression and calculating from the pattern of reflected light a centre of the light falling on an area array. The scanning in the X-Y plane is effected continuously and is limited by datum points defining a dental arch. The impression is then tilted and the process repeated and information correlated to provide the three-dimensional model. A partial impression is then taken of both mandibular and maxillar teeth in comparison with datum points to provide information concerning the bite (occlusal) positions of the teeth. This information is then compared with the full impression to simulate using the three-dimensional models movement of the jaw from an open position to the bite (occlusal) position.