Abstract: An apparatus for intraoral scanning comprises an elongate wand comprising a probe at a distal end of the elongate wand. The apparatus further comprises one or more structured light projectors disposed within the probe, each structured light projector comprising: (a) a housing; (b) a light source disposed within the housing and comprising: a semiconductor laser die; and a beam shaping optical element; and (c) a pattern generating optical element. A distance D between an emission point of the semiconductor laser die and an input face of the beam shaping optical element is 50-250 microns. Each structured light projector is configured to project a pattern of light onto an intraoral surface when the light source of the structured light projector is activated to emit light through the pattern generating optical element of the structured light projector.

Abstract: An intraoral scanner includes one or more structured light projectors, a camera, and control circuitry. The structured light projector(s) are to project a pattern of light onto an intraoral 3D surface. The camera comprises a focusing lens configured to focus at a plurality of different focal depths, each associated with a distinct optical distortion. The camera captures of at least a portion of the pattern of light projected onto the intraoral 3D surface at one or more of the different focal depths. The control circuitry is to change a focus position of the focusing lens to cause the camera to capture the images of the intraoral three-dimensional surface at the one or more different focal depths, wherein the change in the focus position causes a change in optical distortion for the camera and a corresponding change in a calibration of the camera associated with the change in the optical distortion.

Abstract: A method includes receiving a video comprising a face of an individual, the video comprising a current condition of a dental site of the individual. The method includes determining or receiving an altered condition of the dental site and modifying the video by replacing the current condition of the dental site with the altered condition of the dental site in the video.

Abstract: Methods and systems for processing dental workflows. In a pre-routing module, a determination may be made as to whether process(es) in generating an output workflow performed on a digital dental model should be manually or automatically based on comparing patient-specific clinical parameters against clinical rules. In a post-routing module, a determination may be made as to whether the output workflow contains output parameter value(s) that is outside of a range of acceptable output parameter values. An indicator to manually perform the process(es) may be transmitted if the post-routing module determines that output parameters value(s) is outside of the range of acceptable output parameter values. The output workflow may be modified based on the process(es) being manually or semi- manually performed. Dental appliance(s) may be fabricated in accordance with the modified output workflow.

Abstract: A method of treating malocclusions of teeth may include receiving a scan of a patient's teeth and generating a treatment plan to move a patient's teeth from a first position toward a second position. The treatment plan may include moving a jaw from a first position towards a second position. The treatment plan may include a series of jaw movement stages to move the jaw from the first position towards the second position. The method may include generating a digital model of an aligner having mandibular relocation structures. A location of the mandibular relocation structures may be based on a set of location constraints. The method may include fabricating a physical aligner based on the digital model of the aligner.

Abstract: Methods and systems are described that use 2D images and intraoral scans to generate and/or augment 3D models of dental site. In one example a method includes receiving a plurality of intraoral scans of a dental site generated by an intraoral scanner and a plurality of two-dimensional (2D) images of the dental site generated by the intraoral scanner, generating a three-dimensional (3D) surface of the dental site from the plurality of intraoral scans, determining a correspondence between points on the 3D surface and points in one or more 2D images of the plurality of 2D images, and performing one or more operations using the correspondence between the points on the 3D surface and the points on the one or more 2D images.

Abstract: Apparatuses and methods for customized retainers to prevent relapse. In particular, described herein are customized retainers, and methods and apparatuses for making customized retainers that specifically reenforce and prevent movement of one or more teeth having a higher likelihood of relapse following completion of an orthodontic treatment plan.

Abstract: Systems and methods for segmenting dental scans. First and second segmented volumes of scan data may be formed, where the first segmented volume may have a lower resolution than the segmented volume. Segmenting scan data may be formed by merging the first segmented volume with the second segmented volume. Merging may include removing teeth labels from the first segmented volume, adjusting a resolution of the first segmented volume to be the same as a resolution of the second segmented volume, and replacing voxels in the first segmented volume with voxels from the second segmented volume. The segmented scan data may be aligned to a digital model of the patient's dentition. The digital model of the patient's dentition may be modified to include the tooth roots from the aligned segmented scan data to form a modified digital model. A treatment plan may be displayed or modified using the modified digital model.

Abstract: A shell removal device includes a platform configured to secure a mold. An untrimmed shell is formed over the mold. The shell removal device further includes a drive mechanism configured to move the platform away from the untrimmed shell responsive to sensor data indicative that the untrimmed shell has begun to separate from the mold.

Abstract: Systems and methods for manufacturing objects are provided herein. In some embodiments, a method for producing an additively manufactured object includes determining a viscosity of a curable material to be used to form the additively manufactured object. The method can include determining a temperature of the curable material, based on the viscosity. The method can further include adjusting one or more heat sources configured to heat the curable material, based on the temperature. The method can include applying energy to the curable material to form a portion of the additively manufactured object, after adjusting the one or more heat sources.

Abstract: Systems and methods for forming eruption compensation (EC) features in dental appliances for accommodating erupting teeth. Methods may include scaling a virtual tooth model by identifying a crown center line along a buccal-lingual axis of the virtual tooth model, enlarging a lingual side of the virtual tooth model relative to the crown center line by a first scaling factor, and enlarging a buccal side of the virtual tooth model relative to the crown center line by a second scaling factor, where the first scaling factor is greater than the second scaling factor. The scaled virtual tooth model may be added to a 3D dental model of the subject's dentition at an EC region to form a modified 3D dental model. The modified 3D dental model including the scaled virtual tooth model corresponding to the erupting tooth may be output.

Abstract: Disclosed herein are methods for manufacturing medical devices, such as implants, joint replacements, graft materials, augmentation materials, prosthetic materials, etc., from solid material reinforced curable resins. Methods of repositioning a patient's teeth using such medical devices are also provided.

Abstract: Methods and apparatuses (including devices and systems, such as intraoral scanners and software) for analyzing images of a subject's teeth. In some examples these methods may include examining the same teeth or tooth regions across different times and/or different imaging modalities, including but not limited to visible light, infrared, florescent, etc. Also described herein are methods and apparatuses for using a single, master, control for automatically or semi-automatically simultaneously adjusting multiple imaging parameters across multiple images of a region taken with different imaging modalities and/or at different times.

Abstract: Methods and systems for intraoral scanning and generation of 3D surfaces based on intraoral scans are described. In one example a system includes an intraoral scanner and a computing device operatively coupled to the intraoral scanner. The computing device receives an indication that a tool that provides supplemental surface data will be used during intraoral scanning. The computing device implements a supplemental surface data scanning mode in which a three-dimensional (3D) surface of a dental site that is generated from intraoral scan data is supplemented with additional surface data determined based at least in part on properties of the tool, wherein the additional surface data is for a first portion of the 3D surface that is hidden from direct viewing by the intraoral scanner during intraoral scanning.

Abstract: Provided herein are apparatuses (e.g., systems) and methods for automatically assessing a segmented 3D dental model. The segmented 3D dental model may be classified by a trained machine learning classifier (a trained neural network). In some cases, the segmented 3D dental model may be classified as a passing (acceptable) or failing (unacceptable) model. The machine learning classifier may be trained with labeled 3D dental models that illustrate passing and failing segmented 3D dental models.

Abstract: A method includes receiving a) orthognathic patient data comprising information representing an initial state of a patient and b) plurality of treatment parameters that are based on a treatment goal for the patient. The method further includes generating an output state of the patient based on the initial state of the patient and the plurality of treatment parameters, calculating an objective function based on the output state of the patient and the treatment goal of the patient, and updating one or more of the treatment parameters based on the objective function.

Abstract: Patterned dental positioning appliances including a shell having cavities shaped to receive and exert repositioning forces on one or more teeth of a subject's dentition. The shell may include a first cavity having a first raised pattern configured to exert a first force on a first tooth of the one or more teeth, and a second cavity having a second raised pattern configured to exert a second force on a second tooth of the one or more teeth. The second raised pattern may be different than the first raised pattern.

Abstract: Embodiments for estimating a surface texture of a tooth are described herein. One method embodiment includes collecting a sequence of images utilizing multiple light conditions using an intra-oral imaging device and estimating the surface texture of the tooth based on the sequence of images.

Abstract: A processing device of a system makes a comparison between a current image of an oral cavity of a patient and one or more previously received images of the oral cavity of the patient, the current image and the one or more previously received images having been generated by an intraoral scanner. The processing device determines an amount of overlap between a current field of view of the intraoral scanner and topography scans of the oral cavity based on the comparison. The processing device outputs a warning indicator associated with a positioning of the current field of view of the intraoral scanner responsive to determining that the amount of overlap fails to meet or exceed an overlap threshold.

Abstract: The present disclosure provides multi-material orthodontic appliances useful for expanding a palate or arch of a patient, and, in some case, moving one or more teeth of the patient from a first to a second location according to a treatment plan. Further provided herein are methods for producing and using such multi-material orthodontic appliances on an individualized basis where each appliance is tailored to the specific treatment requirements of a patient.