METHOD AND DEVICE FOR THREE-DIMENSIONAL MEASUREMENT OF A DENTAL MODEL
First Claim
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1. ) A method for evaluating cleaning performance of a dental cleaning product, comprising:
- a) preparing a three-dimensional model of a tooth surface prior to cleaning,b) preparing a three dimensional model of a tooth surface after cleaning, andc) comparing the three dimensional models of the tooth surfaces prior to and after cleaning.
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Abstract
A new three-dimensional modelling system for dental surfaces has presently been discovered. The modelling system may include a light source and a camera. Once a three-dimensional model is produced, it can be used, for example, to assess the performance of tooth cleaning products.
43 Citations
20 Claims
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1. ) A method for evaluating cleaning performance of a dental cleaning product, comprising:
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a) preparing a three-dimensional model of a tooth surface prior to cleaning, b) preparing a three dimensional model of a tooth surface after cleaning, and c) comparing the three dimensional models of the tooth surfaces prior to and after cleaning. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. ) A method for making a three-dimensional model of a tooth surface, comprising:
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a) projecting light onto at least a portion of the tooth surface, b) detecting the location of at least a portion of the light on the tooth surface at a first triangulation angle, c) detecting the location of at least a portion of the light on the tooth surface at a second triangulation angle, and d) deriving two dimensions of the three-dimensional model by triangulation based on the first and second photographs, and e) deriving a third dimension from the movement of the light on at least a portion of the tooth surface. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. ) A device for three-dimensional measurement of a dental surface, comprising at least two split-beam measuring devices for generating two measuring surfaces of the dental surface, wherein each of the split-beam measuring devices comprises a first camera system, a second camera system, and a light source;
- wherein an optical axis of the first camera system is inclined at a first triangulation angle with respect to a plane of a beam of light from the light source;
wherein an optical axis of the second camera system is inclined by a second triangulation angle with respect to a plane of a beam of light;
from the light source;
wherein the first triangulation angle is different from the second triangulation angle;wherein the split-beam measuring devices are each arranged at a distance from the dental surface, so that four different measuring surfaces of the dental surface can be generated, and wherein the dental surface and the split-beam measuring devices are arranged so at least one is moveable relative to the other. - View Dependent Claims (16, 17, 18, 19, 20)
- wherein an optical axis of the first camera system is inclined at a first triangulation angle with respect to a plane of a beam of light from the light source;
Specification