Occlusion mapping using elastic foam modeling

Patent metadata

Field	Value
Publication number	US-9549788-B2
Application number	US-201314765403-A
Country	US
Kind code	B2
Filing date	Mar 8, 2013
Priority date	Mar 8, 2013
Publication date	Jan 24, 2017
Grant date	Jan 24, 2017

Abstract

A method for generating a mapping of dental occlusion generates a three-dimensional model of the patient's teeth ( 1 a, 1 b ) according to acquired image data. The maxillary and mandibular arches are positioned in opposition in the generated model of the patient's teeth and a meal model ( 50 ) generated having characteristics of a foam material. A pressure field distribution for the generated meal model is calculated for one or more pairs of opposed teeth ( 1 a, 1 b ) from the generated three-dimensional model of the patient's teeth. The calculated pressure field distribution ( 54 ) can be displayed.

First claim

The invention claimed is:

1. A method for generating a mapping of dental occlusion, the method comprising:
generating a three-dimensional data model of the patient's teeth according to acquired image data;
positioning maxillary and mandibular arches in opposition in the generated data model of the patient's teeth;
generating a meal data model having characteristics of a foam material;
calculating a pressure field distribution for the generated meal data model for one or more pairs of opposed teeth from the generated three-dimensional data model of the patient's teeth; and
displaying at least a portion of the calculated pressure field distribution.

2. The method of claim 1 wherein calculating the pressure field distribution comprises combining modeled information from occlusion at multiple surfaces.

3. The method of claim 1 wherein the pressure field distribution is a Gaussian or a Lorentzian distribution.

4. The method of claim 1 wherein the meal data model comprises values for one or more of density, compression, tensile strength, and cell size.

5. The method of claim 1 wherein the pressure field distribution is calculated as a function of the elastic Young modulus and the Poisson coefficient.

6. The method of claim 1 wherein displaying the calculated pressure field distribution comprises displaying different value ranges in different colors.

7. The method of claim 1 wherein displaying the calculated pressure field distribution comprises displaying the distribution overlaid on an image of the maxillary or mandibular arch.

8. The method of claim 1 further comprising repositioning the maxillary and mandibular arches in opposition in the data model of the patient's teeth and repeating steps of generating the meal data model, calculating the pressure field distribution, and displaying the calculated distribution.

9. The method of claim 1 wherein obtaining digital image data further comprises forming one or more casts or impressions from the mouth of the patient and scanning the one or more casts or impressions using x-rays.

10. The method of claim 1 wherein obtaining digital image data further comprises scanning the mouth of the patient using an intra-oral scanner.

11. The method of claim 1 wherein displaying at least the calculated pressure field distribution comprises displaying a grayscale image.

12. The method of claim 1 wherein calculating the pressure field distribution comprises generating a three-dimensional pressure field relative to a block of material.

13. The method of claim 12 wherein generating the three-dimensional pressure field further comprises averaging the pressure along a predetermined direction.

14. The method of claim 12 wherein generating the three-dimensional pressure field further comprises identifying the pressure along a plane relative to the tooth surface.

15. A method for generating a mapping of dental occlusion of a patient's teeth, the method comprising:
generating a three-dimensional data model of the patient's teeth;
positioning maxillary and mandibular arches in opposition in the generated data model of the patient's teeth;
calculating one or more distances between occlusal surfaces of opposed teeth according to the maxillary and mandibular arch positioning;
generating a meal data model having characteristics of a foam material;
calculating a pressure field distribution for the generated meal data model for one or more pairs of opposed teeth according to the generated data model of the patient's teeth and according to the one or more calculated distances between occlusal surfaces; and
displaying at least the calculated pressure field distribution for one or more of the teeth.

16. The method of claim 15 wherein the calculated pressure field is calculated using one or more axially symmetric functions.

17. The method of claim 15 wherein generating a three-dimensional model of the patient's teeth further comprises obtaining one or more casts or impressions of the patient's maxillary and mandibular arches and scanning the one or more casts or impressions using x-rays.

18. A method for generating a mapping of dental occlusion, the method comprising:
generating a three-dimensional data model of the patient's teeth using one or more casts or impressions of the patient's maxillary and mandibular arches and using digital image data from the one or more casts or impressions;
positioning the maxillary and mandibular arches in opposition in the generated data model of the patient's teeth;
calculating one or more distances between occlusal surfaces of opposed teeth according to the maxillary and mandibular arch positioning;
generating a meal data model having characteristics of a foam material;
calculating a pressure field distribution for the generated meal data model for one or more pairs of opposed teeth according to the generated data model of the patient's teeth and according to the one or more calculated distances between occlusal surfaces; and
displaying at least a portion of the calculated pressure field distribution.

Assignees

• Trophy

Inventors

• Inglese Jean-Marc
• Capron-Richard Sabrina
• Barneoud Julien D
• Millet Frederic
• Etesse Ronan

Classifications

• A61B6/14

  Human Necessities · mapped topic

• A61C7/002 Primary

  Orthodontic computer assisted systems · CPC title

• A61C9/0006

  Impression trays · CPC title

• A61C9/004

  Means or methods for taking digitized impressions · CPC title

• A61C11/00

  Dental articulators, i.e. for simulating movement of the temporo-mandibular joints; Articulation forms or mouldings · CPC title