A - Human Necessities – 61 – C
Patent
A - Human Necessities
61
C
A61C 19/00 (2006.01) A61C 9/00 (2006.01) A61C 11/00 (2006.01) A61C 13/00 (2006.01) A61C 13/34 (2006.01) G01B 11/24 (2006.01) G06F 3/00 (2006.01) G06F 15/42 (1990.01)
Patent
CA 2124154
A 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 digital images movement of the jaw from an open position to the bite (occlusal) position.
Lavelle Christopher L.b.
Wu Chuang-Jy
LandOfFree
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