498 results about "Dental arch" patented technology

A method for assessing the shape of an orthodontic aligner, said method comprising the following steps:a″) acquisition of at least one image at least partially representing the aligner in a service position in which it is worn by a patient, called “analysis image”;b″) analysis of the analysis image by means of a deep learning device, preferably a neural network, trained by means of a learning base, so as to determine a value for at least one tooth attribute of an “analysis tooth zone” representing, at least partially, a tooth on said analysis image, the tooth attribute relating to a separation between the tooth represented by the analysis tooth zone, and the aligner represented on the analysis image, and / orfor an image attribute of the analysis image, the image attribute relating to a separation between at least one tooth represented on the analysis image, and the aligner represented on said analysis image.

The invention provides a method and device for displaying oral data, computing equipment and a program product. The method comprises the steps that first oral cavity data are obtained, the first oral cavity data comprise three-dimensional data of a dental arch, and the dental arch comprises teeth to be repaired; acquiring second oral cavity data through the intraoral scanner, wherein the second oral cavity data comprises scanning data of the to-be-repaired teeth subjected to tooth preparation processing; identifying tooth regions in the first oral data and the second oral data, and identifying a tooth position of the tooth to be repaired based on a difference between the tooth regions in the first oral data and the second oral data; combining the first oral cavity data and the second oral cavity data based on the identified tooth position of the tooth to be repaired to obtain updated three-dimensional data of the dental arch; and displaying the updated three-dimensional data of the dental arch. In this way, an automated workflow is provided for efficiently generating an oral cavity model containing both a complete dental arch form and a precise tooth preparation form without the need to manually mark a tooth preparation region, thereby improving the accuracy and convenience of oral cavity scanning.

Systems and techniques are described for determining at least one of a translational force or a rotational force applied by a dental appliance to a tooth or teeth of a patient. A system includes model teeth configured to represent a portion of a dental arch and receive a dental appliance, a post extending from a first end coupled to a respective tooth to a second end coupled to a base, at least one strain gauge integrally formed on a surface of the post between the first end and the second end, and processor communicatively coupled to the at least one strain gauge and configured to determine at least one of a translational force or a rotational force applied by the dental appliance to the respective tooth.

The invention relates to the technical field of information, and particularly provides a complete denture arrangement virtual simulation method and system, and the method comprises the steps: obtaining the medical record data of a user; the medical record data comprises edentulous jaw soft and hard tissue data, jaw bone data, alveolar ridge morphological parameters, jaw position relation data and facial feature data; determining an initial dental arch curve based on the medical record data; inputting the initial dental arch curve and preset aesthetic parameters into a preset deep learning model to obtain a plurality of initial tooth arrangement schemes; screening the plurality of initial tooth arrangement schemes according to tooth arrangement constraint conditions to obtain tooth arrangement schemes meeting constraints; the tooth position and angle of each tooth arrangement scheme meeting the constraint are adjusted until the preset occlusion balance condition is met, and the first tooth arrangement scheme is obtained, so that the tooth arrangement scheme efficiency of the complete dentures can be improved on the premise that the quality of the tooth arrangement scheme of the complete dentures is guaranteed.

The invention relates to the technical field of oral medical digitization, and discloses a 3D oral point cloud dental arch curve reconstruction method, which comprises the steps of constructing a target feature vector of each key point in each tooth point cloud based on a real three-dimensional coordinate, a curvature and a three-dimensional normal vector of each key point in each tooth point cloud, and training to obtain a target PointTransform model; inputting the 3D oral cavity point cloud to be reconstructed into a target PointTransform model, obtaining three-dimensional coordinates and confidence of each predicted key point in each tooth, screening the predicted key points with the confidence higher than a preset confidence threshold, and associating according to a dental arch sequence to form a dental arch key point set; selecting key mark points from the dental arch key point set, and performing dental arch curve reconstruction based on the key mark points; and performing multi-constraint optimization, local adjustment and segmented mixing on the reconstructed dental arch curve to reconstruct a dental arch curve with higher fitness.

An improved dental impression tray system provides a way to accommodate multiple arch sizes. The tray is adjustable and has an anterior section with two distal ends and a posterior section with two distal ends. The two sections are connected together at their distal ends. A mesh membrane extends between the sections to maintain the impression material. The ends of the posterior section include a plurality of vertical pins and a vertical opening is located adjacent each distal end of said anterior section. To adjust the size of the tray, the distal ends of the anterior section can be disconnected from said distal ends of the posterior section and then reconnected by inserting the pins into the opening. Further size adjustments can be made by removing additional pins and inserting the next remaining pins into the openings.

The invention relates to a computer-implemented method for adjusting a position of artificial teeth of a denture. A digital 3D model of the denture comprising at least a denture part is provided. The denture part is configured for a jaw of a patient and comprises a dental arch with a plurality of artificial teeth arranged in an artificial gingiva. A deformable gingiva section of the artificial gingiva is defined between the teeth of the plurality of artificial teeth and a fixed gingiva section of the artificial gingiva with a fixed geometrical form. The dental arch is moved as a whole relative to the fixed gingiva section in order to adjust the position of the dental arch. A geometrical form of the deformable gingiva section is deformed due to the moving of the dental arch, whereas the fixed gingiva section maintains the fixed geometrical form.

The invention relates to the technical field of dental medicine, in particular to a dental arch model occlusion relation calculation method and device, equipment and a storage medium. The method comprises the following steps: acquiring a dental three-dimensional model of a patient; executing gravity settling positioning operation, fixing the upper jaw model as a static rigid body, releasing translation and rotation freedom degrees of the lower jaw model, and applying gravity action in the normal direction of the occlusal surface; micro-vibration self-adaptive optimization operation is executed, periodic disturbing force dominated by the normal direction is applied to the lower jaw model, and the teeth are driven to generate tangential slippage behaviors along the occlusal surface; identifying an occlusal contact point set, calculating a normal stress value of each contact point, and iteratively adjusting a pose parameter of the lower jaw model; and based on the optimized mandible pose, simulating a mandible motion path, identifying interference points through a continuous collision detection algorithm, and calling back the contact mechanical equilibrium optimization operation to perform closed-loop correction so as to determine the occlusal relationship. According to the method, the occlusion alignment relation better meeting the biomechanics and occlusion function requirements is calculated in an automatic auxiliary mode.

A method of treating a patient's dentition may include generating, from a first 3D model of a first physical impression of a first arch of a patient and a second 3D model of a second physical impression of a first arch of the patient, a reconstructed 3D model of the first arch of the patient by incorporating one or more portions of the first 3D model with one or more portions of the second 3D model and creating a treatment plan for the patient's dentition using the first 3D model. The method may also include fabricating a set of dental alignment devices configured to implement the treatment plan when the dental alignment devices in the set of dental alignment devices are sequentially worn on the patient's dentition.

The utility model discloses an orthodontic bracket capable of reducing friction force, which is characterized in that single-side oblique angles are arranged on the near, far and middle opening sides of a main arch wire groove, the two single-side oblique angles are arranged in parallel, a horizontally arranged transition groove is formed between the two single-side oblique angles of the main arch wire groove, and the transition groove is communicated with the main arch wire groove. The oblique angles are arranged on the near, far and middle opening sides of the main arch wire groove, so that the contact between the dental arch wire and the side wall of the main arch wire groove is changed from linear contact to point contact, the contact area between the dental arch wire and the groove of the main arch wire groove is reduced when teeth incline and move, and the dental arch wire ligature structure has the advantages that the dental arch wire ligature structure is simple in structure and convenient to use. The friction force between the teeth is reduced, the anchorage is saved, and the tooth moving efficiency is improved; the transitional groove is formed in the main arch wire groove, so that the bracket can be quickly positioned during clinical operation, the bracket is ensured to be positioned in the middle of teeth, and doctors in the industry can accept and master the bracket more easily.

The invention provides an oral implant surgery planning method and system and a storage medium. The method comprises the steps that an oral CT three-dimensional model is segmented through an oral model segmentation deep learning model to obtain a tooth CT three-dimensional model, a jaw bone CT three-dimensional model, a neural tube CT three-dimensional model and a blood vessel CT three-dimensional model; generating a dental arch curve based on the tooth CT three-dimensional model; missing tooth coordinate data, missing adjacent tooth coordinate data and implantation area coordinate data are obtained through analysis; analyzing to obtain the axial data of the missing adjacent teeth, and analyzing to obtain the axial data of the implant and the coordinate data of the implantation point according to the axial data of the missing adjacent teeth; performing analysis to obtain safe boundary area coordinate data of the implant; and screening in the implant database to obtain the implant type. A key anatomical structure in an oral cavity CT three-dimensional model is automatically identified and segmented through an oral cavity model segmentation deep learning model, a safety boundary area is calculated, an optimal implant scheme is screened out based on an implant library, and decision support is provided for doctors.

In some embodiments thereof, the present invention discloses systems and methods for expeditiously designing and fabricating properly-fitted dental prostheses. A customizable arch-shaped apparatus approximating dentition is employed intraorally to register positional and relational characteristics between maxillary and mandibular arches, including the vertical dimension of occlusion. The apparatus is configured to allow accurate interface with oral anatomy via its constituent material(s) being pliable and moldable preferably but not necessarily when heated. Representations of dentition may be integrated on the apparatus to aid proper positioning. Intraoral scan data detailing precise arch dimensions is either referenced from pre-existing patient records or procured through digital oral scanning of the apparatus in situ. The registered positional relationships and acquired scan data are jointly utilized to virtually model and subsequently manufacture bridgework, veneers or dentures; the apparatus allowing dentition to be modeled and fabricated in a singular office visit prior to a final, confirmatory try-in where minor adjustments may ensue.

A method for diagnosing and recommending treatment to a patient that may or may not present with occlusal disease includes acquiring 3D scans of the patient's maxillary and mandibular arches, and acquiring occlusal assessment data of the patient's teeth and dental arches. The method also includes automatically generating a treatment plan recommendation, and a recommended treatment plan projection and a non-treatment projection based, at least in part, on the acquired 3D scans of the patient's maxillary and mandibular arches, and the acquired occlusal assessment data of the patient's teeth and dental arches. The method also includes automatically displaying a rendering of the patient's simulated dental arch N years in the future based on the automatically generated recommended treatment plan projection, and a rendering of the patient's simulated dental arch N years in the future based on the automatically generated non-treatment projection, where N is greater than 1.

The invention provides an oral cavity scanning method, computing equipment and a computer program product. The method comprises the following steps: acquiring first scanning data of an oral cavity, including three-dimensional data of a complete dental arch; acquiring second scanning data of the oral cavity, wherein the second scanning data comprises three-dimensional data of a plurality of scanning rods and / or three-dimensional data of auxiliary feature bodies; based on the second scanning data, the relative position relation of the multiple scanning rods is obtained; acquiring third scanning data of the oral cavity, wherein the third scanning data comprises three-dimensional data of part of dental arches and three-dimensional data of at least part of a plurality of scanning rods and / or auxiliary feature bodies; aligning the first scanning data and the second scanning data based on the third scanning data; and generating three-dimensional data of the oral cavity, including the aligned three-dimensional data of the complete dental arch and the aligned position information corresponding to the plurality of scanning rods. According to the method, the accurate relative position relation between the scanning rods is obtained through the auxiliary feature bodies, the scanning process is simplified, and meanwhile the positioning accuracy of the scanning rods is guaranteed.

A process for manufacturing a retainer, said process comprising the following steps: a) at an update time, after the end of an orthodontic treatment, acquiring at least one two-dimensional image of at least one portion of a dental arch of a user, called the “updated image”, by means of an image-acquiring apparatus; b) generating a digital three-dimensional model representing the dental arch of the user, called the “updated model”, based on the updated image; c) designing, based on the updated model and preferably by computer, a retainer suitable for keeping teeth in their configuration at the update time; d) manufacturing the retainer.

The invention relates to a mechanical evaluation system based on rotation and inclination of a bracket-free appliance, and belongs to the technical field of orthodontic equipment. The system comprises four core units: an integral dental arch constraint unit simulates oral temperature through a constant-temperature water bath assembly, adjusts model postures through a camera holder type adjustable dental arch base, and constructs a precise constraint environment; the clinical displacement driving unit is based on an anchorage center bearing lever structure, and positioning-driving-data synchronization is achieved through adjustable anchorage positioning, multi-direction servo driving and displacement closed-loop calibration. The single-tooth mechanical sensing unit collects dynamic mechanical data, and interference is removed through Kalman filtering; and the data processing unit corrects attenuation deviation by using multiple linear regression in combination with environmental parameters, generates a mechanical attenuation curve, calculates a time attenuation percentage, and outputs a mechanical evaluation report by comparing with a clinical suitable force application interval. The evaluation accuracy and clinical suitability of the method provide a scientific basis for the optimization of an orthodontic scheme.

A system for fabricating a dental restoration to restore a tooth at a restoration site in a dentition of a patient is disclosed. The dentition includes a restoration dental arch and an opposing dental arch. The restoration dental arch includes the restoration site and the opposing dental arch is opposite the restoration dental arch. The system includes an impression apparatus, a motion capture apparatus, an interface apparatus, and a restoration design system. The impression apparatus is configured to capture an impression of the dentition of the patient. The motion capture apparatus is configured to capture a plurality of location data points that represent the locations of the opposing dental arch relative to the restoration dental arch. The interference model generation system is configured to generate an interference model for the restoration site. The restoration design system is for designing a restoration using the interference model.

A method of making a teeth-only, gingiva-free dental restoration device for a full-arch dental replacement of a replacement arch of a patient may include using a computing device for: receiving a model of a replacement arch of a patient having post-extraction tooth sockets defined by a substantially original interdental and interradicular ridge of the patient; generating a model of a teeth-only, gingiva-free dental restoration device having individual replacement teeth portions each having a tooth axis extending between a gingival section and an incisal / occlusal section; designating individual replacement teeth portions to include abutment holes based on a location in the model of the replacement arch of straight implants secured within corresponding post-extraction tooth sockets; modifying at least one of a location, shape, and size of one or more of the teeth portions; and outputting information regarding the model for fabricating a teeth-only, gingiva-free dental restoration device.

A mouthpiece includes a buccal retention feature that produces frictional attachment to the lateral buccal portions (inner cheeks) of the individual user. The mouthpiece includes a U-shaped body sized and shaped to conform to the outer face of the dental arch. The retention feature includes bulbous protrusions that project laterally outward from the body to engage the cheek. The mouthpiece, and particularly the buccal retention feature, has a width that is large enough to prevent dislodgment or removal of the device from the mouth, taking advantage of the decrease in the intercommissural distance as the mouth is opened to attempt to remove the device. The device further includes a duct portion extending forward, outside the mouth, from the body, to permit normal respiration through the duct portion. The duct portion can be configured to connect to other devices, including but not limited to, devices for rebreathing, suctioning, feeding or delivering medicaments.

A method of intraoral scanning includes receiving a first one or more intraoral scans of a patient's oral cavity; automatically determining, based on processing of the first one or more intraoral scans, a first scanning role associated with the first one or more intraoral scans, wherein the first scanning role is a first one of an upper dental arch role, a lower dental arch role or a bite role; and determining a first three-dimensional surface associated with the first scanning role.

The invention provides a tooth orthodontic path generation method and device, electronic equipment and a medium. The method comprises the following steps: acquiring three-dimensional point cloud data of an initial dentition of a target patient and an initial pose of each tooth in a global coordinate system; calculating a target six-dimensional pose of each tooth based on the target dental arch curve and orthodontic medical constraints; and by taking the target six-dimensional pose corresponding to each tooth as a search space, generating an optimal orthodontic path of each tooth from the initial pose to the target six-dimensional pose by using an improved particle swarm optimization algorithm. Therefore, automatic, high-precision and interactive tooth orthodontic path generation is realized, and the clinical efficiency and personalized level of tooth orthodontic treatment are improved.

The present invention relates to diagnostic intraoral scanning and tracking. The present invention relates to methods and apparatus for acquiring, using, and displaying a three-dimensional (3D) volume model of a patient's dental arch. The 3D volume model may include surface information (e.g., color) as well as information about internal structures (e.g., near-infrared (Near-IR) transparency values ​​of internal structures including enamel and dentin).

Method for acquiring a model of a dental arch of a user (U), said method comprising the following steps: a) at an update time, extra-oral acquisition, with a portable scanner (12), by the user, of a digital three-dimensional model (8) of said arch, and optionally division of the model of the arch so as to isolate one portion (30) of the model of the arch, so as to obtain an “updated model”, the updated model thus possibly being the acquired model or the portion of the acquired model isolated by division, the object represented by the updated model being called the “updated object”.

The invention provides an oral cavity scanning method, computing equipment and a computer program product. The method comprises the following steps: acquiring first scanning data including three-dimensional data of a scanning rod, an auxiliary feature body and a part of dental arch through an intraoral scanner, and determining a relative position relationship of the scanning rod based on the first scanning data; the method further includes removing three-dimensional data of the scan bar and the auxiliary feature from the first scan data by automated identification, retaining three-dimensional data of a portion of the dental arch, and then acquiring second scan data including the complete dental arch. And synthesizing a three-dimensional image of the oral cavity based on the three-dimensional data of the complete dental arch, the three-dimensional data of the reserved partial dental arch and the relative position relationship of the scanning rods. According to the embodiment of the invention, on the basis of the intraoral scanning technology, the accurate relative position relation between the scanning rods is obtained by using the auxiliary feature bodies, so that the positioning accuracy of the scanning rods is ensured while the scanning process is simplified.

The invention discloses an IOS image and CBCT image registration method based on particle swarm and single-tooth optimization, and belongs to the field of image data processing, and the method comprises the following steps: respectively obtaining tooth semantic segmentation results and point cloud data of an IOS image and a CBCT image through preprocessing and segmentation steps; introducing a particle swarm optimization algorithm, and performing iterative search and optimization on six-degree-of-freedom rigid transformation parameters between the IOS image data and the CBCT image data so as to complete global initial registration of the dental arch scale; and on the basis of a result after global registration, a registration object is divided into a plurality of local units based on a single tooth, and local iteration alignment is performed on each unit, so that tiny dislocation on the single tooth is eliminated, and the overall registration effect is optimized. According to the method, on the basis of processing cross-modal difference and realizing global registration, the registration precision of a single tooth level is further ensured through a local optimization mechanism, and reliable automatic registration support is provided for clinical scenes such as orthodontics and implantation.

The invention relates to an orthodontic tooth division accurate measurement method and system based on digital scanning, and the method comprises the steps: collecting the initial three-dimensional scanning data of teeth of a patient, and obtaining the dynamic change data of the teeth; performing association mapping processing on the tooth dynamic change data to obtain a tooth space position file; based on the tooth space position file, adopting an iterative comparison algorithm to be matched with subsequent scanning data, and judging deviation values of tooth gap width and tooth root inclination in an orthodontic process; the deviation value is analyzed, and real-time dental arch curve adjustment parameters are obtained; based on the real-time dental arch curve adjustment parameters, determining an optimization direction of an individualized tooth division scheme; and performing feedback circulation on the overall tooth space position file by adopting the optimization direction to obtain a final dynamic integration measurement result. According to the invention, through fusion of deep learning and time sequence analysis, accurate tracking of dynamic changes of teeth is realized.

A dental appliance manufacturing system includes a plate. Molds of dental arches are to be positioned on the plate. The dental appliance manufacturing system further includes a heating section configured to be adjusted based on the molds positioned on the plate. The heating section is configured to heat one or more sheets of plastic to generate one or more heated sheets. The dental appliance manufacturing system further includes a thermoforming chamber configured to simultaneously thermoform the one or more heated sheets over the molds positioned on the plate to form a plurality of dental appliances.

Devices, systems and methods for dental arch expansion. A polymeric shell including teeth receiving cavities may be shaped to impart an arch expansion force onto a first tooth of one or more teeth to move the one or more teeth from a first position a first distance from a midline of the arch to a second position a second distance from the midline of the arch, the second distance being greater than the first distance. An occlusal feature extending outward from an occlusal wall of a tooth receiving cavity may be configured to contact an outer occlusal surface of an opposing appliance to impart an anti-tipping force onto the first tooth. The anti-tipping force may be of a magnitude and direction to counteract a tipping moment generated at least in part due to the arch expansion force.

Provided is a shell-shaped dental appliance system for use in the consolidation period of arch expansion or retraction, comprising a series of successive shell-shaped dental appliances (205) configured for being successively worn on a dental arch (203) of a first dental jaw of a patient. Each of the series of successive shell-shaped dental appliances (205) is an integral shell with a cavity for accommodating a plurality of teeth, and the geometrical morphology of the cavity enables the series of successive shell-shaped dental appliances (205) to gradually relocate the dental arch (203) from a tooth layout at the beginning of the arch expansion or retraction consolidation period to a desired tooth layout at the end of the arch expansion or retraction consolidation period. The first dental jaw is an upper jaw or a lower jaw, and an arch expander (201) or an arch retractor is worn on the first dental jaw of the patient in the consolidation period of arch expansion or retraction.

Customized temporary veneers. The customized temporary veneers are configured to be temporarily attached to a target region of an individual's dental arch and include a plurality of tooth-covering regions, at least one joining region, and a gum-proximate region. Each tooth-covering region includes a corresponding vestibular region configured to at least partially cover a vestibular surface of a corresponding tooth of the dental arch. The at least one joining region operatively attaches a pair of adjacent tooth-covering regions to one another. The gum-proximate region extends from the plurality of tooth-covering regions and is configured to extend at least partially between the plurality of tooth-covering regions and a gum of the individual's dental arch. The corresponding vestibular region defines a vestibular region thickness, and the gum-proximate region tapers from the vestibular region thickness to a gum-proximate edge that defines a gum-proximate edge thickness.