Abstract: A method and a system for determining an orthodontic treatment plan including a tooth stripping step are provided. The method comprises: acquiring a 3D digital model of a first tooth and a second tooth of the subject, the second tooth being adjacent the first tooth; receiving a stripping request for stripping tooth material, from at least one of the first tooth along a first stripping plane and the second tooth along a second stripping plane; determining, along a surface of the first tooth, a first area of interest; determining, along the surface of the second tooth, a second area of interest; determining a distance between a first set of vertices associated with the first area of interest and a second set of vertices associated with the second area of interest; in response to the distance being greater than a predetermined distance threshold, denying, by the processor, the stripping request.

Abstract: Methods and systems for determining an orthodontic treatment for a patient are provided. The method comprises: receiving image data associated with a patient's skull; conducting, based on the image data, a cephalometric analysis of the patient's skull; identifying, via the cephalometric analysis, a first pair of reference points; identifying, via the cephalometric analysis, a second pair of reference points; generating based on the first and second pairs of reference points a first reference line and the second reference line, respectively; determining, based on an intersection of the first reference line and the second reference line, a rotation center of a patient's mandible; and based on the rotations center, determining the orthodontic treatment for the patient.

Abstract: Methods and systems for manufacturing an orthodontic appliance with an object incorporated in a surface thereof comprising: acquiring a preliminary appliance 3D digital model; acquiring an object 3D digital model; obtaining a desired coupling location of the object on the orthodontic appliance; positioning the object 3D digital model onto a surface of the preliminary appliance 3D digital model based on the obtained coupling location; causing an initial predetermined degree of penetration; merging the object 3D digital model with the preliminary appliance 3D digital model to generate an appliance 3D digital model of the orthodontic appliance with the object incorporated in the surface; and storing the appliance 3D digital model in an internal memory of the electronic device.

Abstract: A method and system for determining a cut line of an aligner are provided. The method comprises: obtaining 3D model data of a plurality of teeth and a gingiva of a subject; obtaining, using the 3D model data, for each one of the plurality of teeth, a respective one of a plurality of intersection loops; translating each one of the plurality of segmentation loops at a predetermined distance from the gingiva to generate a plurality of offset segmentation loops; identifying, within each one of the plurality of offset segmentation loops, a respective buccal portion and a respective lingual portion; sequentially joining respective buccal portions and respective lingual portions associated with each one of the plurality of offset intersection loops, thereby generating a single arch form loop; and applying the single arch form loop to an unfinished aligner to indicate the cut line on the unfinished aligner for producing the aligner.

Abstract: A method and a system for making an orthodontic appliance are provided, the method comprises: obtaining a 3D digital model comprising a plurality of vertices representative of surfaces of upper and lower teeth of a subject in a current occlusion therebetween; obtaining an indication of a desired occlusion between the upper and lower arch forms; determining, based on the desired occlusion, a shift value between the current occlusion and the desired occlusion; generating, based on the desired occlusion, an outer surface of the appliance 3D digital model corresponds to the respective occlusal surface portion of the given one of the upper and lower teeth having been repositioned towards the desired occlusion by the shift value.

Abstract: A method and apparatus for adjusting an orthodontic treatment plan are provided. The method comprises: acquiring an actual 3D digital model indicative of actual positions of subject's teeth at a given stage of a orthodontic treatment plan; acquiring a planned 3D digital model indicative of planned positions subject's teeth at the given stage of the orthodontic treatment plan; aligning, during a first process, each one of the subject's teeth in the actual 3D digital model and in the planned 3D digital model individually; aligning, during a second process, the subject's teeth in the actual 3D digital model and in the planned 3D digital model, as a whole; determining the deviation value between the actual and planned positions of the given tooth; and in response to the deviation value being greater than a predetermined threshold, adjusting the current treatment plan to minimize the deviation value associated therewith the given tooth.

Abstract: A method and electronic device for determining a T-marking of a given tooth of a subject are provided. The method comprises: obtaining a 3D digital model representative of a surface of a plurality of subject's teeth including the given tooth; obtaining a reference plane extending along an occlusal surface of the given tooth; generating groupings of the mesh elements along a surface of the given tooth; identifying normals at vertices defining each grouping, and projecting the normals onto the reference plane; determining a labiolingual line of the T-marking as a line of best fit of ends of the projected normals with starts in plane origin; determining, a mesiodistal line of the T-marking as a line extending in the reference plane through the reference plane origin and perpendicular to the labiolingual line; and determining the T-marking of the given tooth as the labiolingual line intersecting the mesiodistal line.

Abstract: A method for modeling mandibular motion, executable by an electronic device and including: acquiring a point cloud representing a mandible; determining an initial condyle pose; determining natural movement parameters for the condyles including maximum protrusion displacement, a Bennett angle, and a Sagittal inclination path angle; receiving an indication of a translation and/or a rotation of the mandible; determining a first natural movement of translation including a protrusion followed by a first sagittal inclination; determining a second natural movement of rotation including a Bennet movement followed by a second sagittal inclination; applying the natural movement s to the point cloud to form a transformed point cloud; creating a model of the mandible having undergone the at least one of the translation and the rotation using the transformed point cloud; and displaying the model of the mandible having undergone the translation and/or rotation.

Abstract: A method and a system for determining a bite position between arch forms of a subject. The method comprises: receiving a 3D model including a first portion and a second portion respectively representative of lower and upper arch forms of the subject; determining, a respective distance value from each point of the first portion to the second portion; determining, for each point of the first portion, a respective weight value, thereby determining a respective weighted distance value; aggregating respective weighted distance values associated with each point of the first portion to determine an aggregate distance value being a remoteness measure between the first portion and the second portion; and determining the bite position based on the aggregate distance value.

Abstract: Methods, systems, and apparatuses are described for generating a digital model of a tooth structure for a gap between neighboring teeth of an arch form of a patient. Position of a tooth structure between neighboring teeth may be determined. Arch lines extending through the plurality of teeth may be determined. Intermediate points in the interdental gap may be determined. Longitudinal axis of the tooth structure relative to the neighbouring teeth may be derived. A digital model of the tooth structure may be aligned on the longitudinal axis and a digital model of the tooth structure may be obtained.

Abstract: A method and a system for determining an orthodontic treatment for a subject are provided. The method comprises: obtaining an indication of a current and target position of the given tooth; determining a tooth movement trajectory of the given tooth during the orthodontic treatment, the tooth trajectory defining a path of the given tooth from the current to the target position, the determining the tooth trajectory comprising determining a movement of the given tooth along the tooth trajectory by: determining, a plurality of movement components for the given tooth to be performed to displace from the current to the target position; obtaining, for a given one of the plurality of movement components, a respective magnitude value, the respective magnitude value being indicative of a path length at which the given tooth is to displace towards the target position thereof performing the given one of the plurality of movement components.

Abstract: A method, executable by a processor, for planning an orthodontic treatment for a patient including determining tooth movement. The method includes obtaining a tooth and gingiva mesh from image data associated with teeth and surrounding gingiva; selecting a primary tooth to be moved to a desired position; displacing a tooth mesh of the primary tooth by a basic step distance toward the desired position determined on a jaw curve obtained for the teeth of the patient; determining if the displaced primary tooth collides with at least one secondary tooth in the desired position; in response to collision, displacing a tooth mesh of the secondary tooth away from the tooth mesh of the primary tooth by the basic step distance; and repeating determination of tooth collisions and displacing tooth contours of colliding teeth until no teeth of the teeth of the patient collide.

Abstract: The disclosed systems and methods are for performing digital separation of teeth. The method includes: (i) obtaining a 3D digital model of two adjacent teeth, wherein the 3D digital model includes a first set of elements comprising first tooth elements and second tooth elements, (ii) generating a separation plane relative to the two adjacent teeth by: obtaining a second set of elements associated with a separation zone, identifying a third set of elements which are a subset of the second set of elements, and determining the separation plane, (iv) performing the digital separation by generating a first cutting plane and a second cutting plane, and (v) updating the 3D digital model by removing the first tooth elements and the second tooth elements which are between the first and second cutting planes, and (vi) storing the updated 3D digital model in a memory.

Abstract: Methods and systems for determining orthodontic treatment based on 3D digital model of subject's teeth. The method includes determining, for a given trajectory segment of the orthodontic treatment of a given tooth in which the given tooth is moved from a start position to an end position, whether the force required to move the given tooth from the start position to the end position causes an induced stress associated with at least one other of the plurality of subject's teeth. In response to the induced stress being outside of a predetermined threshold level, determining a counter force to be applied to the at least one other of the plurality of subject's teeth. The orthodontic treatment can be thus determined as including the force to be applied to the given tooth and the determined counter force to be applied to the at least one other of the plurality if subject's teeth.

Abstract: A method and a system for determining a configuration of an open edge for a set of orthodontic appliances are provided. The method comprises: receiving a 3D digital model representative of a surface of a subject's arch form including teeth and a gingiva; obtaining, in the 3D digital model, along a surface of the gingiva, a respective position for a given control point of a plurality of control points, the plurality of control points defining the open edge for a given one of the set of orthodontic appliances; determining, based on the positions of the plurality of control points, a respective vector of positioning values for each of the plurality of control points; storing the respective vector of positioning values for each of the plurality of control points for further use in determining a respective configuration of the open edge for each other one of the set of orthodontic appliances.

Abstract: A method, executable by a processor, of generating an augmented tooth 3D digital model of a given tooth is disclosed. The method includes obtaining a preliminary tooth 3D digital model of the given tooth, and then generating the augmented tooth 3D digital model therefrom by obtaining data of a longitudinal axis of the given tooth, and data indicative of a tooth gingiva segmentation contour between the crown and root portions; determining for each root vertex, a respective new position relative to the longitudinal axis in which the respective new position is defined by a shift distance value and a shift direction vector; moving each of the root vertices to their respective new position by applying their respective shift distance values along their respective shift direction vector to generate the augmented tooth 3D digital model; and storing the augmented tooth 3D digital model for determining an orthodontic treatment for the subject.

Abstract: A method and a system for determining a tooth trajectory for a given tooth of a subject are provided. The method comprises: generating, by executing an optimization algorithm, based on a 3D model of the given tooth, a plurality of segments defining a tooth trajectory of the given tooth from its initial position to its target position. The executing comprises: determining, based on the stress values range, an initial force to be applied to the given tooth, the initial force causing a maximum displacement of the 3D model of the given tooth from the start position associated with the given segment towards the target position associated with the given tooth, thereby identifying an end position associated with the given segment. The method further comprises determining a respective force applied to at least one other 3D model by the maximum displacement of the 3D model of the given tooth.

Abstract: A method and a system for determining an orthodontic treatment for a plurality of teeth of a subject are provided. The method comprises: receiving a 3D representation of a first tooth and a second tooth, adjacent thereto, of the subject, of a plurality of teeth of the subject; obtaining a tooth-gingiva segmentation loop; identifying an outer set of vertices positioned outside the tooth-gingiva segmentation loop and an inner set of vertices positioned inside the tooth-gingiva segmentation loop; generating a first interdental loop extending, along the 3D representation, through a given inner vertex and a given outer vertex, such that: the first interdental loop is at least partially indicative of an interdental boundary between the first tooth and the second tooth; and the first interdental loop intersects the tooth-gingiva segmentation loop; and generating the first tooth 3D representation based on the tooth-gingiva segmentation loop and the first interdental loop.

Abstract: A distributed computer system for manufacturing an orthodontic appliance for a subject is provided. The system comprises: a server communicatively couplable to electronic devices associated with sets of users, the sets of users comprising: a first set of users for providing preliminary orthodontic treatment plans for subjects, a second set of users for providing input to the preliminary orthodontic treatment plans, and a third set of users for manufacturing orthodontic appliances to implement at least a portion of finalized orthodontic treatment plans, the finalized orthodontic treatment plans being based on a given preliminary orthodontic treatment plan and a given input from a user of the second set of users to the given preliminary orthodontic treatment plan.

Abstract: Method for determining a manufacturing parameter for making an aligner with a desired aligner thickness using a thermoforming device operable for making the aligner by shaping a precursor aligner into the aligner using a mold representative of a dental archform, the method comprising: obtaining a 3D map associated with the dental archform; parsing the 3D map to determine a first property value and a second property value, the first property value being based on the 3D map and the second property value being derived from a 2D projection of the 3D map, and determining a thickness of the precursor aligner for obtaining the desired aligner thickness based on a ratio of the first property value and the second property value and a given value of an operating parameter of the thermoforming device; and sending instructions to the thermoforming device to make the desired aligner based on the determined operating parameter.