Automatic generation of prosthodontic prescription

Patent metadata

Field	Value
Publication number	US-12138013-B2
Application number	US-202117390855-A
Country	US
Kind code	B2
Filing date	Jul 30, 2021
Priority date	Apr 15, 2020
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

A processing device may receive a plurality of intraoral scans of the patient that were generated by an intraoral scanner, determine a three-dimensional surface of at least a portion of one or more dental arch of the patient using the plurality of intraoral scans, automatically determine whether a restorative dental object is represented in at least one of the three-dimensional surface or one or more intraoral scans of the plurality of intraoral scans, and automatically generate a prescription for treating the one or more teeth based at least in part on at least one of a) a presence or absence of a restorative dental object in at least one of the three-dimensional surface or the one or more intraoral scans or b) a location of the restorative dental object in the one or more dental arch of the patient.

First claim

What is claimed is:

1. A system comprising:
an intraoral scanner to generate a plurality of intraoral scans of a patient; and
a computing device connected to the intraoral scanner via a wired or wireless connection, the computing device to:
receive the plurality of intraoral scans of the patient;
determine a three-dimensional surface of at least a portion of one or more dental arch of the patient using the plurality of intraoral scans;
automatically determine, based on an analysis of at least one of the three-dimensional surface or one or more intraoral scans of the plurality of intraoral scans, one or more teeth to be treated and a presence of a restorative dental object associated with the one or more teeth, wherein the restorative dental object comprises one of a scan body, a dental implant or a preparation tooth that has been ground to receive a dental prosthesis; and
automatically generate a prescription for performing a prosthodontic treatment on the one or more teeth based at least in part on the presence of the restorative dental object and a location of the restorative dental object on the one or more dental arch of the patient, wherein the prosthodontic treatment comprises design, manufacture and installation of a dental prosthesis associated with the restorative dental object.

2. The system of claim 1 , wherein the computing device is further to:
compare the three-dimensional surface of at least the portion of the one or more dental arch of the patient to a previously generated three-dimensional surface of the one or more dental arch of the patient; and
determine one or more differences between the three-dimensional surface and the previously generated three-dimensional surface based on a result of the comparison, wherein the one or more teeth to be treated are determined based at least in part on the one or more differences.

3. The system of claim 2 , wherein the restorative dental object is a preparation tooth, wherein the plurality of intraoral scans of the patient depict the preparation tooth, and wherein the computing device is further to:
generate a first portion of a three-dimensional model of the one or more dental arch comprising the preparation tooth using the three-dimensional surface; and
generate a remainder of the three-dimensional model using the previously generated three-dimensional surface.

4. The system of claim 2 , wherein the restorative dental object is a preparation tooth, wherein the one or more teeth to be treated comprises the preparation tooth, and wherein the computing device is further to:
automatically determine an exterior surface of a crown to be placed on the preparation tooth based at least in part on a portion of the previously generated three-dimensional surface depicting a tooth before the tooth was ground to become the preparation tooth; and
automatically determine an interior surface of the crown based at least in part on a representation of the preparation tooth in the three-dimensional surface.

5. A system comprising:
an intraoral scanner to generate a plurality of intraoral scans of a patient; and
a computing device connected to the intraoral scanner via a wired or wireless connection, the computing device to:
receive the plurality of intraoral scans of the patient;
determine a three-dimensional surface of at least a portion of one or more dental arch of the patient using the plurality of intraoral scans;
automatically determine that a preparation tooth is represented in at least one of the three-dimensional surface or one or more intraoral scans of the plurality of intraoral scans, wherein the preparation tooth corresponds to a tooth to be treated;
determine one or more changed regions of the preparation tooth between the three-dimensional surface and a previously generated three-dimensional surface of the one or more dental arch based on a result of a comparison between the three-dimensional surface and the previously generated three-dimensional surface;
determine one or more unchanged regions of the preparation tooth between the three-dimensional surface and the previously generated three-dimensional surface based on the result of the comparison;
determine a border between the one or more unchanged regions and the one or more changed regions;
automatically determine a margin line based at least in part on the border; and
automatically generate a prescription for performing prosthodontic treatment on the tooth to be treated based at least in part on a presence of the preparation tooth in at least one of the three-dimensional surface or the one or more intraoral scans, wherein the prosthodontic treatment comprises design, manufacture and installation of a dental prosthesis associated with the preparation tooth.

6. The system of claim 1 , wherein the computing device is further to:
segment the three-dimensional surface of at least the portion of the one or more dental arch into a plurality of separate teeth;
determine a tooth number for each of the one or more teeth to be treated; and
automatically add the tooth number for each of the one or more teeth to be treated to the prescription.

7. The system of claim 1 , wherein the computing device is further to:
determine a type of dental prosthesis to be used to treat the one or more teeth; and
add an identifier of the type of dental prosthesis to the prescription.

8. The system of claim 7 , wherein determining the type of dental prosthesis comprises:
determining, based at least in part on a geometry of the restorative dental object, whether an inlay, an onlay, a crown, a denture, a veneer or a bridge is appropriate to treat the one or more teeth.

9. The system of claim 7 , wherein the restorative dental object is a preparation, and wherein the computing device is further to:
determine an identity of a dentist treating the patient;
determine, based on at least one of the preparation, the type of dental prosthesis, or historical statistics of dental labs used by the dentist, a recommended dental lab to send the prescription to; and
add the recommended dental lab to the prescription.

10. The system of claim 9 , wherein the computing device is further to:
determine at least one of a) historical statistics of materials used for dental prosthetics by the dentist, b) historical statistics of materials used for dental prosthetics by the recommended dental lab or c) materials available at the recommended dental lab;
select a material to use for the dental prosthesis based on at least one of a) the historical statistics of the materials used for dental prosthetics by the dentist, b) the historical statistics of the materials used for dental prosthetics by the recommended dental lab or c) the materials available at the recommended dental lab; and
add the selected material to the prescription.

11. The system of claim 9 , wherein the computing device is further to:
receive color images of the dental arch, the color images having been generated by the intraoral scanner;
determine colors of teeth adjacent to the preparation based on the color images;
determine a color for the dental prosthesis based at least in part on the colors of the teeth adjacent to the preparation; and
automatically add the color of the dental prosthesis to the prescription.

12. The system of claim 1 , wherein the computing device is further to:
receive one or more two-dimensional images generated by the intraoral scanner;
determine whether the one or more two-dimensional images depict an interior of a mouth; and
cause, without user input, the intraoral scanner to begin generating the plurality of intraoral scans or to stop generating intraoral scans based on wh

Assignees

• Align Technology Inc

Inventors

• Saphier Ofer
• Agniashvili Pavel
• Ben-Dov Moti
• Katz Ran
• Kopelman Avi
• Volgin Maxim
• Malka Doron
• Zulti Avraham
• Veryovkin Pavel
• Moshe Maayan
• Tishel Ido
• Levin Adi
• Farkash Shai
• Karapetyan Inna
• Bova Dina
• Fridman Edi
• Coslovsky Jonathan

Classifications

• G06V20/64

  Three-dimensional [3D] objects · CPC title

• G06V10/82

  using neural networks · CPC title

• G06V10/764

  using classification, e.g. of video objects · CPC title

• G06T2210/41

  Medical · CPC title

• G06T17/20

  Finite element generation, e.g. wire-frame surface description, {tesselation} · CPC title