System and methods for positioning 3D virtual brackets on teeth for the precise positioning of conventional brackets and wire. Various reference features may be calculated for the teeth and used to calculate a position for the virtual bracket. Reference features that are calculated include curve of Spee, Andrew's plane, and a facial axis of the clinical crown for the teeth.

Systems and methods for rapidly and reliably determining an arch with of a patient's dental arch. A patient's dentition may be scanned and/or segmented. Arch width may be determined between points of intersection on the occlusal surface and a long axis of each tooth between one or more of: canine, first bicuspid, first primary molar, second bicuspid, second primary molar, and permanent first molar. Arch widths of different modified versions of the patient's dentition may be dynamically compared the patient's starting dentition, or to each other, and may be dynamically updated as the user modifies or switches between one or more 3D models of the patient's dentition.

In some embodiments, apparatuses and methods are provided herein useful to providing data files associated with orthodontic appliances. In some embodiments, a system for providing data files associated with orthodontic appliances comprises a database, wherein the database stores the data files associated with the orthodontic appliances and a control circuit, wherein the control circuit is communicatively coupled to the database, a user device, and a printer, wherein the control circuit is configured to receive, from the user device, an indication of a selected orthodontic device, retrieve, based on the indication of the selected orthodontic device from the database, one of the data files associated with the orthodontic appliances, wherein the one of the data files associated with the orthodontic appliances corresponds to the selected orthodontic appliance, and transmit, to the printer, the one of the data files associated with the orthodontic appliances.

A method and system for identifying a gum line of a tooth model, a device, and a storage medium are disclosed. The method includes:extracting a plurality of feature points from the tooth model based on a curvature algorithm, pre-processing each of the feature points, and outputting a contour point group (S1); obtaining a target reference line from a pre-stored reference line pool withthe target reference line being matched witha shape parameter of the tooth model (S2); fitting the target reference line based on the contour point group by iterative operation, to generate a fitting reference line (S3); and performing smoothing processing on the fitting reference line by using a dimensionality reduction algorithm, to output the gum line (S4).

A method and system to automate an administration and restoration generation process that includes forming a spline along a jaw, proposing potential interdental gaps, weighting the potential interdental gaps to obtain one or more delimiters, automatically proposing tooth number probabilities, and computing a best fit tooth number distribution to generate a patient specific restoration.

In some embodiments, apparatuses and methods are provided herein useful to providing data files associated with orthodontic appliances. In some embodiments, a system for providing data files associated with orthodontic appliances comprises a database, wherein the database stores the data files associated with the orthodontic appliances and a control circuit, wherein the control circuit is communicatively coupled to the database, a user device, and a printer, wherein the control circuit is configured to receive, from the user device, an indication of a selected orthodontic device, retrieve, based on the indication of the selected orthodontic device from the database, one of the data files associated with the orthodontic appliances, wherein the one of the data files associated with the orthodontic appliances corresponds to the selected orthodontic appliance, and transmit, to the printer, the one of the data files associated with the orthodontic appliances.

Methods and systems are provided repositioning teeth of a patient, which employ at least one appliance specific to the patient for placement in the patient's mouth during use. The at least one appliance includes a polymeric shell having a cavity shaped to receive teeth of the upper jaw of the patient. The polymeric shell is integral to a polymeric segment shaped to cover the hard palate of the upper jaw of the patient. The geometry and material properties of the shell is configured such that the appliance adjusts position of the teeth of the upper jaw of the patient during use. The geometry and material properties of the segment is configured such that the appliance adjusts position of the hard palate of the upper jaw of the patient during use. Additionally or alternatively, one or more appliances can be configured to contact the teeth of the lower jaw and a mandibular bone portion disposed below the gingiva of the teeth of lower jaw and adjust position of the teeth and the mandibular bone portion of the lower jaw of the patient during use.

Systems and methods for generating a 3D model of a dentition are disclosed herein. A method includes generating a first 3D model of a dentition including a plurality of model teeth. The method includes receiving at least one digital representation comprising patient teeth. The method includes determining a virtual camera parameter. The virtual camera parameter corresponds with a camera used to capture the digital representation. The method includes comparing, based on the virtual camera parameter, a first position of a model tooth with a position of a corresponding patient tooth of the digital representation. The method includes moving the model tooth from the first position to a second position. The second position is based on the position of the corresponding patient tooth. The method includes generating a second 3D model comprising the model tooth of the first 3D model in the second position.

Provided is a method for generating an orthodontic teeth alignment shape for the orthodontic treatment of a patient. According to the present invention, there is provided a method for generating an orthodontic teeth alignment shape, the method including the steps of: acquiring a patient's teeth shape information; extracting specific points of respective teeth within a given range of at least one of the patient's upper and lower jaws, based on the acquired teeth shape information; comparing the patient's arch form produced by connecting the specific points to one another with a plurality of standard arch forms stored in a database; selecting the standard arch form that is most similar to the patient's arch form from the plurality of standard arch forms stored in the database, based on the comparison result; and generating the orthodontic teeth alignment shape based on the selected standard teeth alignment form.

A method for automatic registration of dental image data comprises receiving three-dimensional intraoral surface scan data of a dentition of a patient, receiving three-dimensional volumetric scan data of the dentition, generating a first set of descriptors characterizing tooth crown surfaces of the dentition from the intraoral surface scan data, generating a second set of descriptors characterizing tooth crown surfaces of the dentition from the volumetric scan data, determining a best-fit registration transform based on the first and second sets of descriptors, and aligning the intraoral surface scan data and the volumetric scan data based on the best-fit registration transform.