Method and device for optical measurement of a cast model of a tooth in restorative dentistry
AssigneePolytec GmbH
InventorsMatthias Schussler, Paul Weigl
Life of this patent
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Abstract
For non-contact and non-destructive measurement of surfaces of cast models of a tooth in restorative dentistry, a coherent-radar device, whose measurement direction is brought generally into alignment with the insertion or placement direction for the dental restoration is used, with the help of a real-time video image, which is recorded either in the insertion or placement direction. The sample holder is a commercially available magnetic tilting table. A light source can be used, which has a narrow bandwidth of about 3-40 nanometers.
Claims11
Method for optical measurement of a cast model of a dental restoration tooth in restorative dentistry, comprising:
- aligning a coherent-radar device to the cast model of the tooth to be restored with dental restoration and/or vice versa, so that a direction of a measurement beam of the coherent-radar device generally coincides with an insertion or placement direction of the dental restoration tooth, defining a Z-direction,
- performing the alignment with help from a real-time video image, which shows at least the tooth to be restored from the Z-direction of the coherent-radar device, and then
- measuring the cast model with the coherent-radar device.
Device for optical measurement of a cast model of a tooth in restorative dentistry, comprising:
- a coherent-radar device (6) and a sample holder (2) for the cast model (1) of a tooth (4) to be restored with dental restoration,
- the coherent-radar device (6) and/or the sample holder (2) are adjustable such that a direction of measurement beams of the coherent-radar device (6)) can be brought generally into alignment with an insertion or placement direction (5) of the dental restoration, defining a Z-direction,
- a camera (10) for recording a real-time video image, which shows at least the tooth (4) to be restored from the Z-direction (5) of the coherent-radar device (6), and
- a display device for showing a recorded real-time video image.
Dependencies are inferred from the claim text.