316 results about "Dentition" patented technology

The invention discloses a data processing method and system for a dental three-dimensional model, and relates to the technical field of dental three-dimensional modeling, and the method comprises the steps: obtaining initial data of oral cavity scanning, recognizing a tooth type in the initial data, and determining a corresponding tooth surface reflection parameter according to the tooth type; generating scanning parameter combinations for different tooth positions according to the tooth surface reflection parameters and the tooth anatomical structure; tooth point cloud data are collected, and a tooth enamel reflective area and a shadow shielding area are identified; performing light reflection removal processing on the enamel light reflection area, performing data completion on the shadow shielding area, and generating corrected tooth point cloud data; and performing registration fusion on the corrected tooth point cloud data to generate a dental three-dimensional model containing a complete dentition. According to the method, the problem of data missing caused by enamel light reflection and adjacent tooth shielding is solved through a differential scanning strategy and regional data processing aiming at specific optical characteristics of teeth, and automatic construction of a high-quality dental three-dimensional model is realized.

The invention belongs to the technical field of stomatology, and particularly relates to an upper jaw fixing expansion appliance which comprises a spiral expansion device, a plastic base, a connecting rod, a retention device and a dental retraction traction hook. The spiral expander is positioned in the center of the appliance, and the plastic base plate is two parts which are separated from each other in the center and connected with the spiral expander and covers the hard palate part of the upper jaw. The retention device is composed of a milk molar or premolar casting continuous belt ring and a first molar independent casting belt ring. And the left and right dental retraction traction hooks are positioned in the plastic base and are used for retracting and pressing the first molar of the upper jaw of buccal inclination after the expansion of the arch. The appliance disclosed by the invention is wide in clinical application range, and is suitable for light and moderate teenager patients with lateral maxillary development insufficiency and maxillary posterior tooth buccal inclination compensation. According to the invention, a good bony expansion effect can be realized for patients in a replacement dentition stage or a permanent dentition early stage and patients in rapid maxillary expansion, and excessive buccal inclination and movement of teeth are reduced.

The invention belongs to the technical field of three-dimensional point cloud processing, and particularly discloses an automatic tooth segmentation method and system for oral cavity scanning point clouds, and the method comprises the following steps: collecting and preprocessing dentition three-dimensional point clouds, extracting point cloud features containing coordinates and normal directions, and constructing a neighborhood structure; setting a first-stage multi-branch network, and performing tooth and gingiva coarse segmentation and instance initial clustering on the point cloud; setting a second-stage semantic refinement network, and carrying out local cutting on the original point cloud; setting a boundary detection and boundary offset network to enhance a tooth contact area, and refining a boundary instance by clustering to obtain a boundary enhanced instance tag; and performing label fusion, and propagating the fused label to the original high-resolution point cloud through a nearest neighbor algorithm to obtain a final semantic label and a final instance label. By adopting the technical scheme, high-precision instance-level segmentation of the complete dentition point cloud is realized through semantic segmentation, boundary detection and clustering cooperative work based on a biased field.

The invention relates to the field of oral clinical orthodontics, and discloses a method for generating an oral correction scheme, comprising: acquiring a face composite model of an initial state of a patient, the face composite model comprising a dental jaw portion and a soft tissue portion; respectively obtaining P correction schemes of the patient, wherein each correction scheme corresponds to a target state of tooth jaw movement; correspondingly obtaining face prediction models of P target states according to the tooth jaw movement and deformation face composite models of the P correction schemes; and in the P correction schemes, selecting an optimal correction scheme as a target correction scheme according to evaluation of the face prediction model in the target state. The invention further discloses electronic equipment and a storage medium, the orthodontic scheme is determined by predicting the appearance, the predicted result is closer to the real effect after orthodontic treatment, more bases are provided for the patient to select the orthodontic scheme, the patient can conveniently determine the ideal orthodontic scheme from the face expression, and a more preferable orthodontic scheme is generated.

The invention relates to an occlusion guide plate designing and manufacturing method based on dentition mechanical analysis, which comprises the following steps: S1, acquiring oral cavity image data of a patient, and constructing a three-dimensional digital model comprising a dental crown, a tooth root and an alveolar bone structure; s2, calculating an overall mechanical reference point of a tooth root structure of an anterior maxillary tooth area; s3, acquiring an incisal edge midpoint of each incisal tooth and a cusp point of each canine tooth in the maxillary anterior tooth area, solving a geometric center, and connecting the geometric center with an overall mechanical reference point to form a dentition direction vector; s4, calculating the displacement relationship between the target dentition arrangement and the initial dentition arrangement in the lip-tongue direction; s5, calculating an included angle between the occlusal force direction of the maxillary anterior tooth area and the dentition direction vector; s6, determining key morphological parameters of the occlusion guide plate according to the calculation result of the included angle in S5; and S7, manufacturing the occlusion guide plate. Compared with the prior art, the method has the advantages of precise mechanical adaptation, quantitative treatment prediction, personalized design and the like.

The invention discloses a digital stable jaw pad designing and manufacturing method, and relates to the technical field of oral rehabilitation and digital medical technology.The digital stable jaw pad manufacturing method comprises the following steps that a, three-dimensional point cloud data of oral dentition and mucosa of a patient is obtained through a three-dimensional scanner; b) determining a stable jaw position coordinate model by using an optical motion capture system; c) designing a jaw pad three-dimensional entity model with an anterior tooth area, a posterior tooth area and an edge structure based on the three-dimensional point cloud data and the stable jaw coordinate model; and d) manufacturing the jaw pad through 3D printing equipment, wherein the 3D printing equipment is formed by adopting a polyether-ether-ketone material. By integrating digital acquisition, design and manufacturing technologies, the pain point of a traditional method is solved, and personalized, high-precision and rapid manufacturing of the stable jaw pad is realized.

A method of multimodal scanning may include generating surface scan data of an intraoral structured using structured light. The method may include generating volumetric scan data of an internal structure of the intraoral structure with OCT scanning. The OCT scan data may be aligned with the surface scan data. A three-dimensional volumetric model of the patient's dentition may be generated based on the aligned OCT scan data and the surface scan data.

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.

Provided are a method for generating an orthodontic design scheme, an electronic device, and a storage medium, for improving the success rate of automatically generating orthodontic design schemes. The method comprises: an electronic device acquiring dentition information of a patient, such as initial position information and target position information (step 101); generating a first orthodontic design scheme on the basis of the dentition information and a preset scheme generation process, wherein the first orthodontic design scheme comprises procedures of N orthodontic steps (step 102); traversing the procedure of each orthodontic step, and recording position information corresponding to a tooth marked with a key position node in the procedure of a first orthodontic step (step 103); and adjusting the position of the tooth marked with the key position node in the procedure of the first orthodontic step according to the position information corresponding to the tooth marked with the key position node in the procedure of the first orthodontic step and orthodontic constraints, to give a second orthodontic design scheme (step 104). Thereby, the generation efficiency and success rate of automatically generating an orthodontic design scheme can be improved.

Embodiments relate to obtaining a virtual 3D representation of a patient's dentition, segmenting the virtual 3D representation to obtain first and second segmented tooth representations of neighboring teeth in the patient's dentition. The method can involve determining an initial tooth pose for the first segmented tooth representation using a geometric parameter of the first segmented tooth representation and a geometric parameter of the second segmented tooth representation. A normalized tooth representation of the first segmented tooth representation is obtained by transforming the first segmented tooth representation using the initial tooth pose for the first segmented tooth representation. The normalized tooth representation is then input into a trained neural network to output a correct tooth pose for the first segmented tooth representation.

The invention provides a condyle positioning device and a lower jaw fixator with the condyle positioning device.The condyle positioning device comprises a condyle positioning component, a tooth retention guide plate and a dividing structure formed between the condyle positioning component and the tooth retention guide plate. Wherein the tooth retention guide plate and the condyle positioning component are of an integrated structure and can be separated along the segmentation structure, the condyle positioning component is suitable for being fixed to the front edge of the ramus of the mandible of a patient, and the tooth retention guide plate is manufactured based on the tooth form of the mandible part of the patient and fixed to the corresponding dentition. The condyle positioning component is connected with the lower jaw fixator through a mortise and tenon joint structure so as to position the specific position of the condyle of the patient after the lower jaw operation.

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.

Methods and kits of materials and supplies for restoring teeth by an injection molding process and / or mold overlays in situ in a patient's mouth so as to correct the imperfect teeth of the patient's dentition. The imperfect teeth are corrected by applying restoration materials using a mold of a corrected model of the patients dentition placed over the imperfect teeth. Adjacent teeth may be covered with a polymer release material prior to injection molding of teeth to be corrected, such that the teeth to be corrected have at least one tooth between them draped with the polymer release material to provide a space adjacent to each of the corrected teeth. The corrected teeth are then covered with the polymer release material in a second round of treatment and restoration material is applied to one or more previously covered teeth to provide a first layer which simulates the dentin layer of teeth. Thereafter a simulated enamel layer is applied over the dentin layer using one or more alternating molds and yet another simulated incisal layer is applied over the enamel layer using one or more alternating molds employing the techniques described.

The toothbrush according to the invention is designed to be elastic and reversibly deflectable in the area of ​​the finger groove (Fm). If the maximum permissible cleaning force on the teeth and gums is exceeded, small but perceptible movements occur between the individual transverse ribs (Qs) in the area of ​​the finger groove (Fm). These movements are easily felt by the user's fingers resting on them, thus allowing the cleaning force to be constantly monitored, controlled, and limited. Furthermore, due to the coordinated design of the transverse ribs (Qs) (essentially in the form of an irregular truncated pyramid) and the essentially trough-shaped transverse recesses (Qa), there is no risk of pinching or chafing of the skin of the fingers, even when the recommended cleaning force is significantly exceeded.and wherein the surface and volumetric contact between all features in the area of ​​the finger groove (Fm) and the fingers resting thereon is consistently / permanently good, comfortable, stable, non-slip and secure, regardless of which specific tooth area in which specific quadrant of the dentition is being brushed or cleaned. The toothbrush according to the invention, in particular a mechanical manual toothbrush, can be manufactured to a high standard and routinely using both single-component and multi-component technologies (with the exception of bristles).

The invention relates to the field of oral medicine, and discloses an oral bone grafting navigation system based on multi-modal mixed reality interaction, which comprises a data processing module, a mixed reality display module and a navigation module, the data processing module is used for acquiring CBCT data and oral scanning data of the oral cavity of the patient, generating a composite three-dimensional model fusing bone tissue and dentition morphology according to the acquired data, and obtaining the three-dimensional morphology, the target placement position and the screw fixing position of the bone grafting bone sheet; the mixed reality display module comprises a head-mounted display device capable of displaying the virtual indication unit and the virtual operation area presentation unit; and the navigation module comprises a navigation marker and an optical positioning camera and is used for tracking the spatial positions of the surgical instrument, the bone sheet and the screw in real time. According to the system and the method, multi-modal image data are combined, and the mixed reality display module and the navigation module are combined, so that real-time visual guidance of the bone slice position and the screw implanting path is realized, and the bone grafting operation efficiency and safety are improved.

Methods of representing user edits or modifications of a treatment plan for a dental apparatus (e.g., one or a series of aligners) by managing an original clinical data set and a set of modifications of the clinical data set. Also described herein are methods of displaying, condensing, storing and reconstructing collision regions between two or more teeth.

A method for intraoral imaging generates one or more output imaging signals from an intraoral probe and acquires multimodal image content from intraoral surface locations according to tissue response from the one or more imaging signals and associates spatial coordinates to the acquired multimodal image content. A surface contour of the patient dentition is generated by stitching the acquired multimodal image content and preserving the association of spatial coordinates with the stitched multimodal image content. Tooth outlines for one or more teeth are generated from the generated surface contour and the generated outlines arranged as a dental chart representing a spatial ordering of the one or more teeth and of supporting gum tissue adjacent to the teeth. The dental chart is populated by analyzing the acquired multimodal image content and associating the analysis to positions on the dental chart according to the preserved association of spatial coordinates and is displayed.

Dental appliances for treatment of a patient's dentition are provided. In some embodiments, a dental appliance includes a plurality of 3D printed polymer layers, where the plurality of 3D printed polymer layers includes a plurality of sequentially polymerized appliance cross-sections. The dental appliance can include an appliance shell formed from the plurality of sequentially polymerized appliance cross-sections. The appliance shell can include a plurality of tooth receiving cavities formed from the plurality of sequentially polymerized appliance cross-sections, the plurality of tooth receiving cavities arranged to receive a dentition and to exert one or more forces on the dentition, and a plurality of variable thickness regions formed from the plurality of sequentially polymerized appliance cross-sections. The plurality of variable thickness regions can include a corresponding plurality of different appliance thicknesses, and the plurality of variable thickness regions can be arranged to implement one or more treatment outcomes.

Methods of manufacturing dental etching templates. A virtual shell having one or more cavities shaped to receive one or more teeth of a virtual dental model of a patient's dentition may be formed. A virtual well may be formed at a position of the virtual shell based on an area on a tooth of the patient's dentition to be etched. Walls that define the virtual well may be shaped to accommodate a volume of a wafer that absorbs a liquid etching material and to accommodate a reservoir that extends beyond the volume of the wafer. The reservoir may be shaped to contain excess liquid etching material from the wafer. A physical etching template may be formed based on the virtual etching template.

The invention provides an unmarked mandibular movement dynamic acquisition method, and relates to the field of dynamic reconstruction of a jaw position relationship. According to the method, feature extraction and posture calculation are performed completely based on the video image and the tooth three-dimensional model, intervention of a mark point or a mechanical device is not needed, the testee can complete collection in a natural state, an artificial interference source is eliminated, and the physiological measurement accuracy and the user experience are remarkably improved. A multi-view-angle high-speed camera system is combined with a dental crown point topological structure for modeling, multi-view-angle space reconstruction and time sequence compensation are utilized, stable tracking and high-precision reconstruction are still kept under the conditions of shielding and motion blur, and the risk of collection failure is effectively avoided. According to the method, based on dentition overall modeling and posture calculation, a complete mandibular movement track curve can be output, complex movements such as chewing, deviation, occlusion and mandibular lateral rotation can be accurately expressed, and high-quality original data is provided for clinical occlusion evaluation generation.

The invention discloses a dental film image-based identification method for an actual occlusion and dislocation occlusion relationship between upper and lower jaws, and relates to the technical field of image identification, and the method can automatically process a large-scale dental film image set by constructing a cloud dental film identification server and combining a cloud connection technology of an image database. And extracting the actual center point coordinate of each tooth, fitting the tooth spacing and calculating the deviation, so that the dentition deviation identification capability is comprehensively improved. Particularly, by introducing calculation and analysis of comprehensive indexes such as a dentition deviation index TDI, an occlusal coverage index OCR and a jaw deflection index BDA, the dislocation condition of the upper jaw and the lower jaw can be efficiently recognized, and different dentition states can be accurately evaluated. According to the automatic recognition method, the time required by manual recognition is greatly shortened, the recognition efficiency and precision are improved, particularly in a clinical scene, the complicated malocclusion condition can be quickly and accurately judged, and a scientific basis is provided for subsequent treatment.

Provided herein are systems and methods for optimizing a 3D model of an individual's teeth. A 3D dental model may be reconstructed from 3D parameters. A differentiable renderer may be used to derive a 2D rendering of the individual's dentition. 2D image(s) of an individual's dentition may be obtained, and features may be extracted from the 2D image(s). Image loss between the 2D rendering and the 2D image(s) can be derived, and back-propagation from the image loss can be used to calculate gradients of the loss to optimize the 3D parameters. A machine learning model can also be trained to predict a 3D dental model from 2D images of an individual's dentition.

Wire attachment dental appliances. A shell may be shaped to receive teeth of a dentition. The shell may include an attachment material reservoir that is configured to accept an attachment material therein. A wire attachment member may be configured to be secured to the shell. The attachment material reservoir and the wire attachment member may be aligned along an arch line of the shell in a manner that allows a wire to simultaneously pass through the attachment material reservoir and engage with the wire attachment member.

Provided herein are methods and apparatuses for analyzing a patient's dental arches in order to generate a treatment plan for the dentition. In particular described herein are methods and apparatuses for determining accurate standardized tooth numbering even when there are missing and / or supernumerary teeth.

The utility model discloses a horizontal clamping screw retention type loose tooth fixing device, which comprises a lip-cheek side splint, a lingual palatal side splint and a retention screw, the lip-cheek side splint and the lingual palatal side splint respectively comprise a tooth fitting part and a retention part, the lip-cheek side splint and the lingual palatal side splint are respectively clamped on the inner side and the outer side of a tooth, and the retention screw is fixed on the lip-cheek side splint and the lingual palatal side splint. The opposite surfaces of the tooth fitting part are respectively matched with the lip buccal surface and the tongue palate surface of the tooth in shape, and the retention part is embedded in the tooth gap or the tail end of a dental arch and is fixedly connected through a retention screw. The dental implant can be used at the early stage of tooth loosening, and dentition defects can be repaired in time without affecting subsequent periodontal treatment.

The application discloses a Gothic arch retaining device for natural dentition and a manufacturing method of the device. The device comprises: a maxillary retaining splint comprising an inner side and an outer side formed around the maxillary natural dentition, the maxillary retaining splint further comprising a plurality of retaining connecting parts extended from the inner side and located in the same horizontal plane; a mandibular retaining splint comprising an inner side and an outer side formed around the mandibular natural dentition, the mandibular retaining splint further comprising a plurality of retaining connecting parts extended from the inner side and located in the same horizontal plane; a maxillary Gothic arch having a plurality of retaining pins for connecting with the plurality of retaining connecting parts of the maxillary retaining splint to determine the position of the maxillary Gothic arch; and a mandibular Gothic arch having a plurality of retaining pins for connecting with the plurality of retaining connecting parts of the mandibular retaining splint to determine the position of the mandibular Gothic arch. The Gothic arch can be installed, fixed and used on the natural dentition.

This invention discloses a digital complete denture manufacturing method and a digital complete denture, relating to the field of digital oral technology. The invention acquires digital models of the patient's edentulous maxilla and mandible, along with jaw position data. Virtual tooth arrangement and denture base design are completed in computer-aided design software, generating a composite digital model. The base data is converted into CNC instructions, and a five-axis CNC milling machine is used to cut prefabricated material blocks to produce a solid denture base. Matching solid prefabricated dentitions are selected from a prefabricated dentition database, surface-activated, and then bonded and fixed to complete the denture assembly. This method is highly efficient, provides stable precision, and significantly shortens the manufacturing cycle and the number of treatment visits.

A method is provided for generating and / or displaying a dynamic tooth chart In some cases, the method can include receiving dataset(s) associated with a patient. Each dataset comprises data corresponding to an imaging modality of a plurality of imaging modalities and provides information on a dentition of the patient. The datasets are processed to generate, for each dataset, one or more tooth portions. Each tooth portion comprises an image of one or more teeth of the patient. The one or more tooth portions are arranged into a dental chart. A visualization of the dental chart of the patient is generated and provided to a user device for presentation in a user interface. In some cases, a method can include determining one or more chart annotations can by performing a shape analysis, a teeth arrangement analysis, and / or a material analysis on 3D dental model(s) and / or 2D images of the patient's jaw.

An oral trauma stabilizer includes an upper stabilizer and a lower stabilizer. A plurality of shock absorbers couple the upper stabilizer to the lower stabilizer. The upper and lower stabilizers have an arcuate body extending from a first end to a second end. A channel is formed in each arcuate body and extends along a length from the first end to the second end of the arcuate body. A cross section of each channel may vary along the length of the respective channel. In use, the oral trauma stabilizer stabilizes an injured tooth, bone, or other portion of a patient's oral anatomy using non-affected portions of the dentition or other oral anatomy to secure the oral trauma stabilizer in place.