US 2026/0306218 A1Published application

System And Method For Predicting Tooth Movement & Fabricating Orthodontic Appliances

AssigneeSolventum Intellectual Properties Company

InventorsKarl J.L. Geisler, Nicholas T. Poeschl, Nicholas D. Bobeldyk

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Abstract

A computer-implemented method for predicting tooth positions includes a) defining a plurality of tooth positions corresponding to a plurality of teeth in a dental arch; b) defining a plurality of appliance positions of an orthodontic appliance; c) determining, for each tooth, one or more tooth position differences; d) determining, for each tooth, one or more appliance position differences; e) determining, for each tooth, one or more appliance-tooth relative differences; f) modifying each of the plurality of tooth positions based on the corresponding one or more appliance-tooth relative differences; g) iteratively repeating steps c) to f) until a maximum change in each of the plurality of tooth positions is less than a convergence threshold; and h) defining the plurality of tooth positions obtained in the final iteration of step g) as a plurality of predicted tooth positions.

Claims21

Dependent claims

A system for orthodontic treatment, the system comprising:

a computing device;
a processor;
a memory storing instructions that, when executed by the processor, configure the computing device to:
a) define a plurality of tooth positions corresponding to a plurality of teeth in a dental arch, wherein each tooth position from the plurality of tooth positions is defined by a tooth coordinate system that is associated with a crown of a respective tooth from the plurality of teeth;
b) define a plurality of appliance positions of an orthodontic appliance, wherein each appliance position from the plurality of appliance positions is defined by an appliance coordinate system that is associated with the orthodontic appliance and corresponds to the respective tooth;
c) determine, for each tooth, one or more tooth position differences, wherein each of the one or more tooth position differences is defined as a difference between the tooth position of a respective adjacent tooth that is adjacent to the respective tooth and the tooth position of the respective tooth;
d) determine, for each tooth, one or more appliance position differences, wherein each of the one or more appliance position differences is defined as a difference between the appliance position corresponding to the respective adjacent tooth that is adjacent to the respective tooth and the appliance position corresponding to the respective tooth;
e) determine, for each tooth, one or more appliance-tooth relative differences, wherein each of the one or more appliance-tooth relative differences is based on the one or more tooth position differences and the one or more appliance position differences of the respective tooth;
f) modify each of the plurality of tooth positions based on the corresponding one or more appliance-tooth relative differences, wherein a change in each of the plurality of tooth positions is less than or equal to a maximum predetermined change value;
g) iteratively repeat steps c) to f) until a maximum change in each of the plurality of tooth positions is less than a convergence threshold;
and
h) define the plurality of tooth positions obtained in the final iteration of step g) as a plurality of predicted tooth positions of the orthodontic treatment.

9 more elements

A computer-implemented method for predicting tooth movement in an orthodontic treatment, the computer-implemented method comprising:

a) defining a plurality of tooth positions corresponding to a plurality of teeth in a dental arch, wherein each tooth position from the plurality of tooth positions is defined by a tooth coordinate system that is associated with a crown of a respective tooth from the plurality of teeth;
b) defining a plurality of appliance positions of an orthodontic appliance, wherein each appliance position from the plurality of appliance positions is defined by an appliance coordinate system that is associated with the orthodontic appliance and corresponds to the respective tooth;
c) determining, for each tooth, one or more tooth position differences, wherein each of the one or more tooth position differences is defined as a difference between the tooth position of a respective adjacent tooth that is adjacent to the respective tooth and the tooth position of the respective tooth;
d) determining, for each tooth, one or more appliance position differences, wherein each of the one or more appliance position differences is defined as a difference between the appliance position corresponding to the respective adjacent tooth that is adjacent to the respective tooth and the appliance position corresponding to the respective tooth;
e) determining, for each tooth, one or more appliance-tooth relative differences, wherein each of the one or more appliance-tooth relative differences is based on the one or more tooth position differences and the one or more appliance position differences of the respective tooth;
f) modifying each of the plurality of tooth positions based on the corresponding one or more appliance-tooth relative differences, wherein a change in each of the plurality of tooth positions is less than or equal to a maximum predetermined change value;
g) iteratively repeating steps c) to f) until a maximum change in each of the plurality of tooth positions is less than a convergence threshold;
and
h) defining the plurality of tooth positions obtained in the final iteration of step g) as a plurality of predicted tooth positions of the orthodontic treatment.

6 more elements

Dependencies are inferred from the claim text.