Identifying forces on a tooth

Patent metadata

Field	Value
Publication number	US-9375300-B2
Application number	US-201213365167-A
Country	US
Kind code	B2
Filing date	Feb 2, 2012
Priority date	Feb 2, 2012
Publication date	Jun 28, 2016
Grant date	Jun 28, 2016

Abstract

The present disclosure includes computing device related, systems, and methods for identifying force placed on a tooth are described herein. One method includes receiving initial orthodontic data (IOD) including teeth data; creating a virtual set of teeth from the IOD; receiving dental appliance information including at least one of dental appliance material properties and characteristics; virtually placing a dental appliance, formed from the dental appliance information, onto the virtual set of teeth; and determining one or more forces applied to the teeth based on information from the IOD and dental appliance information.

First claim

The invention claimed is:

1. A computing device implemented method of virtually identifying force placed on a tooth, comprising:
receiving initial orthodontic data (IOD) including teeth data;
creating a virtual set of teeth from the IOD;
receiving dental appliance information including at least one of dental appliance material properties and characteristics;
virtually placing a dental appliance, formed from the dental appliance information, onto the virtual set of teeth; and
computing one or more desired force parameters of a dental appliance based on information from the IOD and dental appliance information to achieve a particular position of a particular segment of a treatment plan; and
estimating one or more forces generated by the virtually placed dental appliance as applied to one or more teeth based on information from the IOD and dental appliance information and verifying that the virtually created dental appliance is applying a desired force parameter to the one or more teeth based on a comparison of the desired force and the one or more estimated forces.

2. The method of claim 1 , wherein the method includes designing an optimized dental appliance by virtually testing and adjusting the geometry and position of the dental appliance iteratively to reach the desired forces to move teeth to a first stage tooth position based on at least one of the dental appliance material properties, characteristics, and oral cavity characteristics to reach a desired result for moving the teeth to the first stage teeth locations.

3. The method of claim 1 , further including displaying the one or more forces applied to one or more teeth and the desired forces via a user interface.

4. The method of claim 1 , further comprising comparing one or more desired forces to corresponding estimated forces and presenting the results via a user interface.

5. The method of claim 1 , wherein the desired forces and the one or more estimated forces include at least one of: points of contact between teeth and dental appliance, a relative magnitude of point contact force of the dental appliance, an amount of stress on the dental appliance, and individual contacts of the dental appliance.

6. The method of claim 1 , wherein the treatment plan has a plurality of dental appliances and wherein the appliances include an aligner and an attachment.

7. The method of claim 1 , wherein determining the desired force parameters include data from at least one of: a patient's mouth, typodont data, and scanned dental appliance data.

8. The method of claim 1 , wherein the dental appliance material properties and characteristics include thickness of the dental appliance, dimples in the dental appliance, reinforcement structures, and strength of material used to construct the dental appliance.

9. A system for virtually identifying force placed on teeth, comprising:
a processor;
memory having instructions executable by the processor to:
receive initial orthodontic data (IOD) of teeth of a patient;
identify a virtual target dental model of the teeth based on the IOD representing a treatment plan;
identify one or more virtually created dental appliances utilized in the treatment plan;
compute one or more desired force parameters of a dental appliance to achieve a particular position of a particular segment of the treatment plan; and
estimate forces generated by the virtually created dental appliance as applied to one or more teeth and verify that the virtually created dental appliance is applying a desired force parameter to the one or more teeth based on a comparison of the desired force parameters and the estimated forces.

10. The system of claim 9 , wherein the desired force parameters and estimated actual forces present include at least one of a relative magnitude of point contact force of the dental appliance, an amount of stress on the dental appliance, and individual contacts of the dental appliance.

11. The system of claim 10 , wherein the relative magnitude of point contact force is displayed on a user interface as force and torque vector arrows showing a direction and magnitude.

12. The system of claim 10 , wherein the amount of stress on the dental appliance is displayed on a user interface as a light number of dots to a heavier number of dots scale.

13. The system of claims 10 , wherein the individual contacts of the dental appliance are displayed as arrows.

14. The system of claim 9 , wherein the estimated forces present on the virtually created dental appliance are displayed on a user interface.

15. The system of claim 9 , wherein the system includes a library of data including at least one of: tooth shapes, appliance shapes, appliance characteristics, mounting material characteristics, tooth structures, and mouth structures.

16. A non-transitory computing device memory having executable instructions that can be executed by a processor to cause a computing device to perform a method of virtually identifying force placed on a tooth, comprising:
receiving initial orthodontic data (IOD) of teeth;
receiving desired tooth positions of a treatment plan for the teeth contained in the IOD;
computing a desired force and a desired torque to be applied to the teeth to reach the desired tooth positions;
computing an estimated force and estimated torque generated by a virtually placed dental appliance as applied to one or more teeth based on information from the IOD and dental appliance material and appliance characteristic information and verifying the virtual dental appliance is applying a desired force parameter to the one or more teeth; and
designing an optimized dental appliance shape and position to move teeth to the desired tooth positions based on a comparison of the desired force and torque and the estimated force and torque.

17. The memory of claim 16 , wherein designing the optimized dental appliance shape and position includes:
virtually testing and adjusting the dental appliance iteratively to attempt to reach the desired force and torque for moving a particular tooth from an initial position to a desired position based on the comparison.

18. The memory of claim 17 , further including:
displaying the desired force and desired torque via a user interface; and
displaying the estimated force and torque applied to the teeth by the dental appliance via the user interface.

19. The memory of claim 17 , wherein one of: position, shape, and orientation of the dental appliance are modified by the user via the user interface if the desired force and torque are not obtained.

20. The memory of claim 16 , wherein a new one of: position, shape, and orientation is calculated and suggested to the user via the user interface.

Assignees

• Matov Vadim
• Faradjev Igor
• Pesenti Bastien
• Geyn Sergey
• Tenzin Konstantin
• Align Technology Inc

Inventors

• Matov Vadim
• Faradjev Igor
• Pesenti Bastien
• Geyn Sergey
• Tenzin Konstantin

Classifications

• A61C7/08

  Mouthpiece-type retainers {or positioners, e.g. for both the lower and upper arch (arch-shaped medicament applicators for teeth or gums A61C19/063; mouthguards for protecting the teeth of sportsmen A63B71/085)} · CPC title

• A61C7/002 Primary

  Orthodontic computer assisted systems · CPC title

• A61C19/04 Primary

  Measuring instruments specially adapted for dentistry ({A61C5/44 takes precedence; testing vitality of teeth A61B5/0534;} radiation diagnosis specially adapted for dentistry A61B6/51) · CPC title