# US 11,992,381 B2 · Orthodontic planning systems > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,992,381 B2 - Document ID: US11992381B2 - Status: Granted - Kind: B2 - Application number: 16/735,983 - Filed: 2020-01-07 - Published: 2020-05-14 - Granted: 2024-05-28 - Earliest claimed: 2015-10-07 - Assignees: uLab Systems, Inc. - Applicants: uLab Systems, Inc. - Inventors: Huafeng Wen - Web page: https://patentgrep.com/patent/US11992381B2 ## CPC - A61C 7/002: {Orthodontic computer assisted systems} - A61C 7/08: 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)} - G16H 30/20: for handling medical images, e.g. DICOM, HL7 or PACS - G16H 50/50: for simulation or modelling of medical disorders - 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) - G16H: HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA ## Abstract Systems and methods are disclosed for treating teeth to correct for malocclusions. This may be accomplished in one variation by receiving a scanned dental model of a subject's dentition, determining a treatment plan having a plurality of incremental movements for repositioning one or more teeth of the subject's dentition, and fabricating one or more aligners correlating to a first subset of the plurality of incremental movements. ## Claims ### Claim 1 A method for developing a treatment plan via a processor for correcting one or more malocclusions in a subject, comprising: receiving a scanned dental model of a subject's dentition; determining a treatment plan having a plurality of incremental movements for repositioning one or more teeth of the subject's dentition, wherein one or more three-dimensional spheres of influence each having a predefined diameter is assigned to a model of each of the one or more teeth to define a safety envelope and to set a proximity distance between each tooth model as the tooth models move along a tooth movement path; displaying the tooth movement path of each tooth model; and fabricating one or more aligners correlating to a first subset of the plurality of incremental movements. ### Claim 2 (depends on 1) The method of claim 1 further comprising reassessing the subject's dentition after a predetermined period of time to monitor the repositioning of the one or more teeth. ### Claim 3 (depends on 1) The method of claim 1 further comprising fabricating one or more additional aligners correlating to a second subset of the plurality of incremental movements. ### Claim 4 (depends on 1) The method of claim 1 further comprising treating the one or more teeth via a non-aligner corrective measure. ### Claim 5 (depends on 1) The method of claim 1 wherein receiving a scanned dental model comprises receiving a digital image of the subject's dentition. ### Claim 6 (depends on 1) The method of claim 1 wherein determining a treatment plan further comprises: applying a label to one or more teeth within the dental model; simulating a rolling ball process along an exterior of the one or more teeth and gums within the dental model; determining a boundary between each of the one or more teeth and gums based on a path or trajectory of the rolling ball process; assigning a hard or soft region to each of the one or more teeth and gums within the dental model; and moving a position of the one or more teeth within the dental model to correct for malocclusions in developing a treatment plan. ### Claim 7 (depends on 6) The method of claim 6 wherein simulating a rolling ball process comprises detecting for changes in a path of the rolling ball. ### Claim 8 (depends on 6) The method of claim 6 wherein determining a boundary comprises determining a boundary between adjacent teeth based on a projected trajectory of the rolling ball between the teeth. ### Claim 9 (depends on 1) The method of claim 1 wherein determining a treatment plan further comprises: determining a movement for a plurality of digital tooth models in the dental model for correcting the malocclusions via a tooth movement manager module; assigning the spheres of influence on each of the tooth models via a collision manager module; monitoring an actual state of each tooth of the subject; comparing the actual state of each tooth against an expected state of each tooth model via a tooth manager module; and adjusting the movement of one or more teeth based on a comparison of the actual state and the expected state if a deviation is detected. ### Claim 10 (depends on 9) The method of claim 9 wherein determining a movement comprises independently executing a tooth movement plan for each of the tooth models. ### Claim 11 (depends on 9) The method of claim 9 wherein assigning a sphere of influence further comprises monitoring for a collision between tooth models. ### Claim 12 (depends on 11) The method of claim 11 further comprising communicating a collision warning to an adjacent tooth model such that one or more of the tooth models alter their movement to avoid the collision. ### Claim 13 (depends on 1) The method of claim 1 wherein fabricating one or more aligners further comprises: fabricating a support structure which corresponds to an outer surface of the dentition; forming one or more oral appliances upon an exterior surface of the support structure such that an interior of the one or more oral appliances conform to the dentition; and removing the support structure from the interior of the one or more oral appliances. ### Claim 14 (depends on 13) The method of claim 13 wherein forming one or more oral appliances comprises forming one or more dental attachments upon the oral appliances. ### Claim 15 (depends on 1) The method of claim 1 wherein fabricating one or more aligners further comprises: calculating a rule-based cutting loop path on the model for determining a path for trimming a mold replicating the patient's dentition; applying a drape wall from the cutting loop on the model to reduce a complexity of the model; determining a position of a cutting instrument relative to the mold for trimming the mold; generating a computer numerical control code based on the drape wall and position of the cutting instrument; and fabricating the mold based on the generated computer numerical control code. ### Claim 16 (depends on 15) The method of claim 15 wherein calculating a rule-based cutting loop path comprises identifying a first location and a second location opposite to the first location on the model at corresponding interface regions and extending a trim line between the first location and second location. ### Claim 17 (depends on 16) The method of claim 16 wherein applying a drape wall comprises identifying the trim line and replacing a volume below the trim line with a base region. ### Claim 18 (depends on 15) The method of claim 15 wherein applying a drape wall comprises limiting a height of the drape wall to avoid stretching an oral appliance formed upon the mold. ### Claim 19 (depends on 15) The method of claim 15 wherein fabricating the mold comprises securing the mold to a platform. ### Claim 20 (depends on 1) The method of claim 1 further comprising generating one or more manufacturing files based on the treatment plan. ### Claim 21 (depends on 20) The method of claim 20 further comprising transmitting the one or more manufacturing files to a location remote from the subject. ### Claim 22 (depends on 1) The method of claim 1 wherein displaying the tooth movement path further comprises receiving an input from the subject with respect to the treatment plan.