# US 11,896,452 B2 · Method for virtual setup with mixed dentition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,896,452 B2 - Document ID: US11896452B2 - Status: Granted - Kind: B2 - Application number: 16/494,504 - Filed: 2018-03-14 - Published: 2020-03-19 - Granted: 2024-02-13 - Earliest claimed: 2017-03-16 - Assignees: Carestream Health, Inc. - Applicants: Carestream Dental Technology Topco Limited; Delphine Reynard; Sabrina Capron-Richard; Sebastien Henry; Shoupu Chen; Aude Lagardere; Jean-Pascal Jacob - Inventors: Delphine Reynard; Sabrina Capron-Richard; Sebastien Henry; Shoupu Chen; Aude Lagardere; Jean-Pascal Jacob - Web page: https://patentgrep.com/patent/US11896452B2 ## CPC - A61C 7/002: {Orthodontic computer assisted systems} - A61C 13/34: Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4] - A61B 6/032: {Transmission computed tomography [CT]} - A61B 6/4085: {Cone-beams} - A61B 6/51: for dentistry - A61B 6/512: {Intraoral means} - A61C 9/0046: {Data acquisition means or methods} - G06T 1/20: Processor architectures; Processor configuration, e.g. pipelining - G06T 7/0012: {Biomedical image inspection} - G06T 7/149: involving deformable models, e.g. active contour models - G06T 7/62: of area, perimeter, diameter or volume - G06T 17/20: Finite element generation, e.g. wire-frame surface description, {tesselation} - G06T 19/00: Manipulating three-dimensional [3D] models or images for computer graphics - G06T 19/20: Editing of three-dimensional [3D] images, e.g. changing shapes or colours, aligning objects or positioning parts - G06T 2200/24: involving graphical user interfaces [GUIs] - G06T 2207/10081: Computed x-ray tomography [CT] - G06T 2207/30036: Dental; Teeth - G06T 2219/2021: Shape modification - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract A method for visualizing patient dentition acquires a contour image of patient dentition and segments the contour image to identify one or more segmented teeth. At least one deciduous tooth among the one or more segmented teeth is identified. A virtual model of a target dentition arrangement of the patient dentition is generated, wherein the at least one deciduous tooth is replaced by a replacement permanent tooth. ## Claims ### Claim 1 A method for visualizing a patient dentition orthodontic treatment comprising: acquiring a surface contour model of patient dentition; segmenting the surface contour model to identify one or more segmented teeth; identifying at least one unerupted tooth within the surface contour model, wherein the at least one unerupted tooth is identified using at least one of three-dimensional volume acquisition or panoramic radiography; accessing shape and size information for the unerupted tooth based, at least in part, on the at least one of the three-dimensional volume acquisition or the panoramic radiography; identifying a substitute model tooth based at least in part on the shape and size information for the unerupted tooth, wherein the substitute model tooth reflects a replacement permanent tooth model; and generating a virtual setup of the patient dentition, wherein a location corresponding to the at least one unerupted tooth is replaced by the replacement permanent tooth model. ### Claim 2 (depends on 1) The method of claim 1, further comprising providing a segmented cone-beam computed tomography (CBCT) 3D volume, and wherein the replacement permanent tooth model replaces an unerupted permanent tooth from the segmented CBCT 3D volume. ### Claim 3 (depends on 1) The method of claim 1, wherein the replacement permanent tooth model is an erupted permanent tooth symmetrical to the tooth. ### Claim 4 (depends on 1) The method of claim 1, wherein the replacement permanent tooth model is derived from a selected tooth model library. ### Claim 5 (depends on 1) The method of claim 1, wherein the replacement permanent tooth model is determined with a predictive model analysis using size and shape of at least one permanent tooth among the one or more segmented teeth. ### Claim 6 (depends on 1) The method of claim 1, wherein each identified segmented tooth has a corresponding mesh and a tooth margin. ### Claim 7 (depends on 1) The method of claim 1 wherein acquiring the surface contour model comprises acquiring one or more images from a CBCT apparatus, a panoramic radiography apparatus or an intraoral scanner. ### Claim 8 (depends on 1) The method of claim 1 wherein generating the virtual setup of patient dentition further comprises determining jaw size. ### Claim 9 (depends on 1) The method of claim 1 wherein one or more operator specified metrics are used for evaluating a discrepancy between a desired final tooth arrangement and the virtual setup. ### Claim 10 (depends on 1) The method of claim 1 wherein an arch shape of the generated virtual setup is modified from the arch shape of the acquired surface contour model. ### Claim 11 A method for visualizing a patient dentition orthodontic treatment comprising: receiving a plurality of segmented teeth from a virtual model of an initial tooth arrangement; identifying at least one unerupted tooth within the surface contour model, wherein the at least one unerupted tooth is identified using at least one of three-dimensional volume acquisition or panoramic radiography; accessing shape and size information for the unerupted tooth based, at least in part, on the at least one of the three-dimensional volume acquisition or the panoramic radiography; identifying a substitute model tooth based at least in part on the shape and size information for the unerupted tooth, wherein the substitute model tooth reflects a replacement permanent tooth model; and generating a virtual setup of a target tooth arrangement wherein a location corresponding to the at least one tooth is replaced by the replacement permanent tooth model. ### Claim 12 (depends on 11) The method of claim 11, further comprising providing a segmented CBCT 3D volume or segmented panoramic radiography image, and wherein the corresponding permanent tooth model replaces an unerupted permanent tooth from the segmented CBCT 3D volume or segmented panoramic radiography image. ### Claim 13 (depends on 11) The method of claim 11, wherein the corresponding permanent tooth model is determined based on an erupted permanent tooth symmetrical to the unerupted tooth, derived from a selected tooth model library, or determined with a predictive model analysis using size and shape of at least one permanent tooth among the one or more segmented teeth. ### Claim 14 (depends on 11) The method of claim 11, wherein the receiving a plurality of segmented teeth further comprises: acquiring a 3D mesh of the initial tooth arrangement; and segmenting the 3D mesh to identify the plurality of segmented teeth, wherein each segmented tooth has a corresponding mesh and a tooth margin. ### Claim 15 (depends on 11) The method of claim 11, further comprising: accepting operator selections of one or more preferences and corresponding metrics that relate to changes in the initial tooth arrangement, where the virtual setup simulates patient dentition according to the operator selected preferences and the corresponding metrics. ### Claim 16 (depends on 15) The method of claim 15 further comprising displaying at least one of the operator selected preferences and corresponding metrics with the virtual setup. ### Claim 17 (depends on 16) The method of claim 16, further comprising: accepting a subsequent operator selection to modify at least one selected preference and corresponding metric; re-generating the virtual setup that simulates the patient dentition according to the at least one subsequent operator modified preference and corresponding metric; and displaying the at least one subsequent operator modified preference and corresponding metric with the re-generated virtual setup. ### Claim 18 (depends on 15) The method of claim 15 wherein the one or more preferences relate to maxillary arch type, mandibular arch type, inter-canine width expansion, flattening parameters for shaping the arch curve, tooth translation, arch expansion and tooth translation, arch contraction and tooth translation, tooth extraction, tooth extraction order, interproximal reduction, and occlusal class treatment type. ### Claim 19 (depends on 11) The method of claim 11 further comprising accepting operator selections of one or more simulation options, wherein the simulation options relate to one or more of arch expansion and tooth translation, arch contraction and tooth translation, or interproximal reduction and tooth translation. ### Claim 20 An apparatus for providing a virtual setup for orthodontics assessment, the apparatus comprising: an imaging apparatus configured to acquire a surface contour of patient dentition; a processor programmed with instructions that (i) segment the dentition surface contour to identify one or more segmented teeth; (ii) identify at least one unerupted tooth within the surface contour model, wherein the at least one unerupted tooth is identified using at least one of three-dimensional volume acquisition or panoramic radiography; (iii) access shape and size information for the unerupted tooth based, at least in part, on the at least one of the three-dimensional volume acquisition or the panoramic radiography; (iv) identify a substitute model tooth based at least in part on the shape and size information for the unerupted tooth, wherein the substitute model tooth reflects a replacement permanent tooth model; (v) generate a virtual setup of a target dentition arrangement, wherein a location corresponding to the at least one unerupted tooth is replaced by the corresponding permanent tooth model; and a display in signal communication with the processor, and configured to display the virtual setup.