An automated method for the generation of intermediate orthodontic digit alignments

A digital and algorithmic technology, applied in the field of automation for the generation of intermediate orthodontic digital arrangements, can solve problems such as complex search spaces

Active Publication Date: 2022-02-22
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since each tooth has 6 degrees of freedom and the average dental arch has about 14 teeth, finding the optimal tooth trajectory from the initial stage to the final stage has a large and complex search space

Method used

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  • An automated method for the generation of intermediate orthodontic digit alignments
  • An automated method for the generation of intermediate orthodontic digit alignments
  • An automated method for the generation of intermediate orthodontic digit alignments

Examples

Experimental program
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Embodiment Construction

[0013] Embodiments of the invention include a system, possibly partially or fully automated, to generate a set of intermediate orthodontic arrangements that move a set of teeth from a malocclusion to a final arrangement or allow Partial treatment from one state to another (e.g. from an initial state to a specific intermediate state). Each arrangement ("state" or "arrangement") of teeth is represented as a node in a graph, and robot motion planning is used to expand the graph and search for paths to valid states. These states or arrangements may be a digital representation of the arrangement of the teeth at a particular stage of treatment, where the representation is a digital 3D model. For example, digital arrays can be used to make orthodontic appliances such as invisible aligners to move teeth along a treatment path. For example, invisible tray aligners can be made by converting a digital arrangement into a corresponding physical model and thermoforming a sheet of material ...

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Abstract

The present invention provides a method for generating a digital array for an orthodontic treatment path. The method includes receiving a digital 3D model of a tooth; performing interproximal reglazing (IPR) on the model, and after performing the IPR, generating an initial alignment having stages including an initial alignment, a final alignment, and a plurality of intermediate alignments. treatment path. The method also includes calculating IPR accessibility for each tooth at each stage of the initial treatment path; applying IPR throughout the initial treatment path based on the calculated IPR accessibility, and applying the initial treatment The path is divided into steps of possible motion of the teeth, resulting in a final treatment path with an arrangement corresponding to the steps. The arrangement can be used to fabricate orthodontic appliances, such as invisible tray aligners, for each stage of the treatment path.

Description

Background technique [0001] The intermediate step change of teeth from the malocclusion stage to the final stage requires that precise individual tooth movements be determined in such a way that the teeth do not collide with each other, the teeth move towards their final state, and the teeth follow an optimal trajectory (preferably for the short track). Since each tooth has 6 degrees of freedom and the average dental arch has about 14 teeth, finding the optimal tooth trajectory from the initial stage to the final stage has a large and complex search space. This optimization problem needs to be simplified by splitting the trajectory into several shorter and easier to find trajectories and using other methods and techniques. Contents of the invention [0002] A method according to the invention for generating an arrangement for an orthodontic treatment path comprises receiving a digital 3D model of a tooth; optionally performing interproximal reglazing (IPR) on said model, an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C7/00A61C9/00
CPCA61C7/002A61C9/0053
Inventor 亚历山大·R·坎利夫本杰明·D·西默乔纳森·D·甘德鲁德古鲁普拉萨德·索马孙达拉姆阿拉什·桑加里迪普蒂·帕乔里肖娜·L·托马斯南希·M·阿马托
Owner 3M INNOVATIVE PROPERTIES CO
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