Method and device for the three-dimensional determination and digitisation of a plaster-or positive-model
First Claim
1. Method for the three-dimensional mapping and digitization of a plaster or positive model (1), in particular for producing a dental prosthesis, with the following steps:
- clamping the plaster or positive model (1) in a mounting (2) which is rotatable about an axis of rotation in a defined orientation;
irradiation of the plaster or positive model (1) by means of a radiation source and receiving the radiation reflected by the plaster or positive model (1);
evaluating the reflected radiation by a scanning unit (7) and generating a distance information;
defined movement of the plaster or positive model (1) relative to the radiation source along a plane and/or first axis (y) which extends perpendicular or almost perpendicular to the direction of radiation;
linking a signal for detection of the rotation with the path and distance information for forming a three-dimensional volume model of the plaster or positive model (1), whereby the distance between the mounting (2) and scanning unit (7) in direction of the optical axis (z axis) of the scanning unit (7) remains unchanged or essentially unchanged during the digitization of the plaster or positive model (1) along a scanning path s, where s≧
1 mm.
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Accused Products
Abstract
The invention relates to a method for the three-dimensional determination and digitisation of a plaster- or positive-model (1), in particular for the production of replacement teeth, whereby a method with improved handling and costs and with the following steps is disclosed: clamping the plaster- or positive-model (1) in a mounting (2) with a defined orientation, irradiation of the plaster- or positive-model (1), by means of a radiation source and recording of the radiation reflected by the plaster- or positive-model (1), evaluation of the reflected radiation by a scanning unit (7) and generation of separation information, defined movement of the plaster- or positive-model (1) relative to the radiation source along an axis (y), approximately perpendicular to the direction of radiation and linking the displacement with the separation information. The invention also relates to a device for carrying out said method.
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Citations
11 Claims
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1. Method for the three-dimensional mapping and digitization of a plaster or positive model (1), in particular for producing a dental prosthesis, with the following steps:
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clamping the plaster or positive model (1) in a mounting (2) which is rotatable about an axis of rotation in a defined orientation;
irradiation of the plaster or positive model (1) by means of a radiation source and receiving the radiation reflected by the plaster or positive model (1);
evaluating the reflected radiation by a scanning unit (7) and generating a distance information;
defined movement of the plaster or positive model (1) relative to the radiation source along a plane and/or first axis (y) which extends perpendicular or almost perpendicular to the direction of radiation;
linking a signal for detection of the rotation with the path and distance information for forming a three-dimensional volume model of the plaster or positive model (1), whereby the distance between the mounting (2) and scanning unit (7) in direction of the optical axis (z axis) of the scanning unit (7) remains unchanged or essentially unchanged during the digitization of the plaster or positive model (1) along a scanning path s, where s≧
1 mm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification