Granted Patent B2

US 12,423,932 · App. 17/920,187 · Granted Sep 23, 2025

Inventors: Thomas Lundgaard Hansen (Copenhagen K, DK); Karl-Josef Hollenbeck (Copenhagen Ø, DK)

Assignee: 3SHAPE A/S

G06T19/20A61C13/34G06T17/00G06T2219/004G06T2219/2004G06T2219/2021

Abstract

Claims (46)

1. A computer-implemented method of evaluating a dental preparation surface comprising:

obtaining a digital oral situation and/or a portion thereof, comprising a digital preparation surface;

using software trained to detect the digital preparation surface by segmenting the digital oral situation to identify teeth appropriate for the digital preparation surface based on a shape of the teeth, wherein the digital preparation surface is configured to receive a digital dental prosthesis;

evaluating at least one attainable thickness, wherein the attainable thickness is configured as a distance between the digital preparation surface and a surrounding, the surrounding comprising a part of the digital oral situation that is not part of the digital preparation surface; and

comparing the at least one attainable thickness to at least one minimum thickness as required by a dental restoration.

2. The method according to claim 1 , further comprising generating an inner surface for the digital dental prosthesis based on the digital preparation surface.

3. The method according to claim 1 , further comprising generating an outer surface for the digital dental prosthesis.

4. The method according to claim 1 , further comprising:

generating an inner surface for the digital dental prosthesis based on the digital preparation surface;

generating an outer surface for the digital dental prosthesis based on the digital preparation surface; and

generating the digital dental prosthesis based on the inner surface and the outer surface.

5. The method according to claim 1 , further comprising adjusting the digital dental prosthesis and/or the digital preparation surface by:

evaluating the digital dental prosthesis and/or the preparation surface for the at least one minimum thickness and the at least one attainable thickness;

comparing the at least one minimum thickness and the at least one attainable thickness; and

adjusting the digital dental prosthesis and/or the digital preparation surface where at least one of the at least one minimum thickness and at least one of the at least one attainable thickness are in conflict.

6. The method according to claim 1 , further comprising displaying the digital preparation surface, the digital oral situation, and/or the digital dental prosthesis.

7. The method according to claim 1 , further comprising:

evaluating the digital preparation surface for problems areas based on the at least one attainable thickness;

displaying the digital preparation surface, the digital oral situation, and/or the digital dental prosthesis; and

highlighting the problem areas on the digital preparation surface, the digital oral situation, and/or the digital dental prosthesis.

8. The method according to claim 1 , further comprising:

aligning the digital dental prosthesis with the digital oral situation and/or the digital preparation surface; and

displaying the digital dental prosthesis and the digital oral situation.

9. The method according to claim 1 , further comprising:

calculating an effect of at least one drill characteristic and/or an inner surface of the digital dental prosthesis; and

adjusting at least one of the at least one attainable thickness and/or the inner surface of the digital dental prosthesis based on the effect of the at least one drill characteristic.

10. The method according to claim 1 , further comprising:

calculating an effect of a plurality of drill radii on the at least one attainable thickness and/or an inner surface of the digital dental prosthesis; and

selecting at least one drill radius based on the calculation of the effect of the plurality of drill radii.

11. The method according to claim 1 , further comprising:

detecting at least one undercut area of the digital preparation surface; and

adjusting at least one of the at least one attainable thickness, an inner surface of the digital dental prosthesis, and/or the digital preparation surface based on the at least one undercut area.

12. The method according to claim 1 , further comprising selecting at least one prosthesis material by:

evaluating the at least one minimum thickness based on each of a plurality of prosthesis materials; and

selecting at least one of the plurality of prosthesis materials based on evaluation of the at least one minimum thickness.

13. The method according to claim 1 , further comprising selecting at least one prosthesis material by:

estimating a cost of each of a plurality of prosthesis materials; and

selecting at least one of the plurality of materials based on the estimated costs.

14. The method according to claim 1 , wherein the digital oral situation further comprises at least one opposing tooth, the method further comprising:

identifying at least one opposing tooth surface in the digital oral situation;

identifying an interocclusal distance; and

adjusting at least one of the at least one attainable thickness and/or an outer surface of the digital dental prosthesis based on the interocclusal distance and the at least one opposing tooth surface.

15. The method according to claim 1 , wherein the oral situation further comprises at least one neighboring tooth, the method further comprising:

identifying at least one neighboring tooth surface;

identifying a desired interproximal distance; and

adjusting at least one of the at least one attainable thickness and/or an outer surface of the digital dental prosthesis based on the desired interproximal distance and the at least one neighbouring tooth surface.

Assignments (1)

Priority Claims (2)

Continuity (1)

References Cited (12)