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431 results about "Tooth crown" patented technology
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High-precision and automatic dental crown generation method
The invention discloses a high-precision and automatic dental crown generation method. The method comprises seven steps of oral cavity three-dimensional data acquisition, full-mouth tooth semantic segmentation, upper and lower jaw point cloud precise registration, abutment and associated gingiva precise segmentation and trimming, abutment surrounding environment multi-tissue segmentation, neck-edge line secondary precise detection, and dental crown generation and multi-dimensional refinement. The method comprises the steps of oral cavity three-dimensional data acquisition, full-mouth tooth semantic segmentation, upper and lower jaw point cloud precise registration, abutment and associated gingiva precise segmentation and trimming, abutment surrounding environment multi-tissue segmentation, neck-edge line secondary precise detection and dental crown generation. Through combination of deep learning and a point cloud algorithm, high-precision segmentation of teeth and gingiva and precise reduction of an occlusion relationship are realized, an oral anatomical feature library and a clinical repair standard are fused, and through multi-dimensional fine adjustment optimization, a dental crown 3D model which is high in fitting degree, harmonious in occlusion and capable of meeting clinical requirements is generated. The method is full-process automatic, greatly improves efficiency, reduces operation threshold, reduces material waste and diagnosis and treatment cost, remarkably improves repair success rate, and is suitable for various oral repair scenes.
Owner:SHANGHAI FANSHI INFORMATION TECHNOLOGY CO LTD
Maxillary and mandibular devices that increase the smallest concentric airway cross-sectional area of a user for improvements during physical activities
ActiveUS12485036B2Snoring preventionNon-surgical orthopedic devicesRest positionBiomedical engineering
Mandibular repositioning devices have a maxillary piece with a right side backmost teeth mold and / or left side backmost teeth mold and a driver flange having an anterior side with a convex curvature protruding from one or both thereof. The devices have a mandibular piece with a protrusive flange extending cranially therefrom positioned to have a posterior side engaged with the anterior side of each driver flange and with a plateau of a preselected height between the base of the protrusive flange and the tooth covering. The posterior side of each protrusive flange has a concave-to-convex curvature from a base of the protrusive flange toward a most cranial point of the protrusive flange and a convex portion of the concave-to convex curvature engages the convex curvature of the driver flange in a rest position. The plateau prevents disconnect between each protrusive flange and a respective driver flange.
Owner:SLEEP SOLUTIONS OF TEXAS LLC
Occlusion guide plate design and manufacturing method based on dentition mechanical analysis
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.
Owner:SHANGHAI NINTH PEOPLES HOSPITAL SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
Dental components and methods to align dental components
A system can be configured to record a position and orientation of a dental component. The system can include a coping and a replica. The coping can include an anti / rotational feature that is configured to mate with an anti-rotational feature of a dental component. The coping can also include an orientation feature that is configured to convey the orientation of the dental component. The replica can include a first anti-rotational feature that corresponds to the anti-rotational feature of the dental component. The replica can also include a second anti-rotational feature that does not correspond to the anti-rotational feature of the dental component.
Owner:NOBEL BIOCARE SERVICES AG
Matrices including crowns for dental restoration
A dental matrix for forming a crown on a tooth includes a body having a expandable tab, which allows the diameter of an opening to be expanded for removal of the matrix from the formed crown.
Owner:IVENEER LTD
Dual-stage CBCT (cone beam computed tomography) and oral cavity scanning tooth registration method and system
The invention discloses a dual-stage CBCT and oral scanning tooth registration method and system, and relates to the field of tooth three-dimensional digital model registration, and the method comprises the following steps: extracting a tooth voxel structure in a CBCT image and a dental crown grid structure in an oral scanning image through a segmentation network; a coarse-to-fine depth registration network is introduced, geometric feature coding and feature matching are carried out on super-points obtained through multi-resolution down-sampling, local matching is carried out on a dense point set in a super-point neighborhood, a rigid transformation matrix is calculated in parallel, and an optimal registration result is screened out from the rigid transformation matrix; and dividing a registration object into a plurality of three-tooth groups containing three adjacent teeth, and performing local iteration alignment based on an initial registration result. The method still has higher robustness and accuracy under the complex conditions of large cross-modal difference, high input point cloud density and the like, is shorter in time consumption, and provides reliable data basis and automatic support for clinical scenes such as orthodontics and implantation.
Owner:CHONGQING UNIV OF POSTS & TELECOMM
Bionic oral implant bridge
The invention is applied to the technical field of oral implant bridges, and particularly discloses a bionic oral implant bridge which comprises a lower abutment, the lower abutment is of an arc-shaped structure and is supported by a carbon fiber reinforced resin matrix composite, an upper abutment is fixedly embedded in the upper surface of the lower abutment, and a lower abutment is fixedly embedded in the lower surface of the upper abutment. The upper abutment is of a blocky structure made of a carbon fiber reinforced resin-based composite material. According to the bionic oral implant bridge, a multi-layer bionic structure composed of the inner supporting layer, the middle filling layer and the outer functional layer is arranged in the outer connecting part connected with the dental crown, the inner supporting layer is composed of the inner supporting part made of metal titanium and the arc-shaped protruding blocks, and the structural strength of the outer connecting part is improved through the inner supporting part; local stress during chewing can be dispersed through the annular distribution design of the protruding blocks made of the titanium material, single-point stress overload of the inner supporting part is avoided, the middle filling layer is made of polymethyl methacrylate, meshing impact force is buffered, and damage to the structure caused by direct transmission of hard force is reduced.
Owner:HANGZHOU DEKAILI MEDICAL EQUIP CO LTD
Method, system and devices for instant automated design of a customized dental object
Embodiments of the present invention provide a method, system, devices and software which provide customized, clinically relevant designs, e.g. treatment plans / solutions for at least single tooth replacement therapy in real-time as needed to enable immediate confirmation of the validity and execution of patient-specific treatment solutions.A Machine Learning algorithm is used in a method or system for computer implementation of automatic restoration design. The restoration design includes the design of restorative elements such as crowns and abutments. Software is provided for carrying out the methods when executed on a digital processor. Manufacturing of the restorative elements is also included.
Owner:DENTSPLY SIRONA INC
Standardized three-dimensional periodontal attachment quantification system and method
The invention discloses a standardized three-dimensional periodontal attachment quantification system and method, and relates to the technical field of digital oral medicine, and the method comprises the following steps: calibrating a cementum-enamel boundary, dividing a tooth model into a dental crown and a tooth root, and determining the total surface area of the tooth root; performing sensitivity analysis by using the candidate threshold sequence, and determining an optimal diagnosis threshold in combination with a surface integrity criterion; based on the optimal diagnostic threshold, an absolute adhesion area and a relative adhesion area ratio are calculated and output. The invention provides a quantitative method capable of truly, comprehensively and accurately reflecting the three-dimensional pathological change of the periodontal tissue, and the accuracy of a measurement result is ensured through standardized crown root segmentation and accurate geometric judgment; through data-driven parameter optimization, uncertainty caused by manual intervention is eradicated, and objectivity and repeatability of a measurement result are ensured.
Owner:PEKING UNIV SCHOOL OF STOMATOLOGY
Mark-free mandibular movement dynamic acquisition method
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.
Owner:NANJING XIAOLING TECH CO LTD
System and method for determining a dental condition based on the alignment of different image formats
A method for determining a dental condition comprising: receiving at least one volumetric image and at least one intra-oral surface scan image of a dental structure of a patient, wherein the dental structure includes at least one of a crown, root, gingiva or bone; aligning the at least one volumetric image with the at least one intra-oral surface scan image; identifying boundaries of the gingiva and the bone within the aligned images; and calculating distances between the identified boundary of the gingiva and cementoenamel junction (CEJ), the identified boundary of the bone and the CEJ, and the identified boundary of the gingiva and the identified boundary of the bone to determine the dental condition.
Owner:DGNCT LLC
Data processing method and apparatus for implant tooth, device, and medium
Embodiments of the present disclosure relate to a data processing method and apparatus for an implant tooth, a device, and a medium. The method comprises: in response to a scanning operation on a target tooth site into which a drilling needle is drilled, obtaining scanning data of the drilling needle; and designing and obtaining a dental crown and an abutment of the target tooth site on the basis of the scanning data of the drilling needle so as to carry out a tooth placement operation at the target tooth site on the basis of the dental crown and the abutment. By adopting the described technical solution, after the drilling operation of the drilling needle on a tooth, an overall scanning operation of the tooth into which the drilling needle is drilled is carried out to obtain the scanning data of the drilling needle, and the dental crown and the abutment designed and obtained on the basis of the scanning data of the drilling needle are the final dental crown and abutment, so that the tooth placement operation can be directly carried out.
Owner:SHINING 3D TECH CO LTD
Dental restoration system and method of building a restoration
A dental restoration system (1) for restoring a tooth at least during healing of an implant structure (5) placed in a jaw of a patient, comprising a crown base (3) and a locking member (2). The crown base (2) is configured to be positioned on a gingiva former (4) mounted to the implant structure (5). The locking member (2) has a contact surface (212) and a securing structure (24) configured to be secured to the gingiva former (4). The crown base (3) has a through hole (31) configured to receive the locking member (2) such that the contact surface (212) of the locking member (2) contacts the crown base (3) and the securing structure (24) extends at least partially out of the crown base (3). The crown base (3) is made of a base material configured to be combined with a crown material used for building a crown (6).
Owner:STRAUMANN RES AG
Detachable dental crown clamp
Owner:SHANGHAI CHENXIN MEDICAL DEVICES CO LTD
A diamond compact
ActiveCN117569746BReduced wear at the same locationincrease drilling speedDrill bitsMechanical engineeringMouth opening
The application relates to a diamond compact, which comprises a tooth sleeve, the cross section of the tooth sleeve is arranged in a circular ring, a blocking disc is coaxially fixed to an opening of one end of the tooth sleeve, a tooth lock body is fixed to the inner side of the blocking disc, a tooth body is provided with a lock groove at one end, a tooth crown is fixed to the other end, the tooth body is installed in the tooth sleeve, the tooth lock body is axially locked with the lock groove, and the tooth body can rotate relative to the tooth lock body. The tooth body can rotate around the tooth sleeve, the position of the tooth crown in contact with the rock is continuously changed, the abrasion of the same position of the tooth crown is reduced, the probability of sudden rupture of the tooth crown is greatly reduced, the cutting edge can be kept sharp for a long time, the service life of the compact is prolonged, and the drilling speed and footage of the PDC drill bit are improved.
Owner:KINGDREAM PLC CO +1
Dental crown feature point extraction method, device, equipment and medium
The invention relates to the technical field of dental crown data processing, and discloses a dental crown feature point extraction method, device and equipment and a medium, and the method comprises the steps: obtaining dental jaw point cloud data of a target patient, carrying out the point cloud grid reconstruction of the dental jaw point cloud data, and generating a three-dimensional dental crown digital model; performing dental region segmentation on the three-dimensional dental crown digital model to obtain an independent dental crown model of each tooth, and constructing a local coordinate system corresponding to the independent dental crown model; performing spatial registration on the independent dental crown model according to the local coordinate system to obtain a target dental crown model, and extracting an initial dental crown feature matrix according to the target dental crown model; performing adaptive sampling on the initial dental crown feature matrix to obtain dental crown sampling vertexes, and performing double-branch offset prediction according to the dental crown sampling vertexes to obtain an offset point cluster; and calculating a point cluster clustering center point of the offset point cluster, and determining a dental crown feature point according to the point cluster clustering center point. According to the method, the extraction efficiency and accuracy of the dental crown feature points can be improved.
Owner:成都齿灵科技有限公司
A bridge-type implant superstructure combined prosthesis
This invention relates to the field of implant bridging technology, specifically to a bridging-type implant superstructure restoration. It includes a support layer structure, which is fixed to the jawbone by a plurality of implant screws rotatably mounted below it. A plurality of crowns are mounted above the support layer structure, with the support layer structure positioned between the crowns and the jawbone. The support layer structure absorbs part of the occlusal impact force generated by the crowns from top to bottom. Fixing components are disposed inside the crowns, securing them above the support layer structure. The fixing components are coaxially arranged with the implant screws. The support layer structure, through the fixing components, restricts the installation orientation of the crowns, ensuring that the crown axis remains parallel to the jawbone surface. The lower and upper clamps of this invention are fixedly connected by two staggered support rods. When the lower and upper clamps approach each other, they compress the two support rods, causing lateral deformation and absorbing the occlusal impact force.
Owner:TOPDENT INT DENTAL LAB CO LTD
Parameterization description method of tooth three-dimensional model
The invention relates to the technical field of data processing, and discloses a tooth three-dimensional model parameterization description method, which comprises the following steps: carrying out standardization processing on local point cloud data of teeth to obtain three-dimensional model data of the teeth; meshing the three-dimensional model data to obtain triangular mesh model data of the teeth; integrating a dental crown edge, an occlusal surface and a root boundary region in the triangular mesh model to obtain a key feature region of the tooth; according to curvature change characteristics in the key feature region, identifying anatomical mark points of the teeth, and removing noise points in the anatomical mark points to obtain a feature point set of the teeth; mapping the feature point set to a two-dimensional parameter space, generating a continuous parameterized surface through radial basis function interpolation, and performing geometric reconstruction on the parameterized surface to obtain a parameterized description model of the tooth; outputting the parameterized description model as parameterized description of the teeth; according to the method, the parameterized description efficiency of the tooth three-dimensional model can be improved.
Owner:GAOZHEN INFORMATION TECHNOLOGY (SHANGHAI) CO LTD
An intraoral drug delivery device
This application belongs to the field of medical devices and relates to an intraoral drug delivery device. The drug delivery device includes a substrate that can be disposed on a tooth crown. The substrate has a drug storage unit. When the substrate is disposed on the tooth crown, the drug storage unit can release drug outwards. Alternatively, the drug delivery device includes an adhesive layer that can adhere to the tooth crown, the adhesive layer containing a drug mixture. By disposing the substrate on the tooth crown and having the drug storage unit disposed therein, the drug can be released, providing therapeutic or nursing effects to the tooth crown, oral cavity, or body.
Owner:TAIZHOU WANJIA DENGHUO PROPERTY MANAGEMENT CO LTD
Scalpel for pulling wisdom teeth
The scalpel comprises a first scalpel handle and a first scalpel head, the first scalpel head is detachably arranged at the front end of the first scalpel handle, a connecting insertion block is arranged at the front end of the first scalpel handle, and a step-shaped clamping groove is formed in the outward end of the connecting insertion block; the tail end of the first tool bit is provided with a connecting groove matched with the stepped clamping groove and the connecting inserting block in appearance, the front end of the first tool bit is provided with an integrally-formed extending part, the extending part is bent outwards, and the width of the end is gradually reduced to form a tip in the outward extending process of the extending part. Blades are arranged on the two side surfaces of the extension part; the extension part which is bent outwards can be suitable for narrow and irregular spaces around wisdom teeth, especially at different tooth position angles, and can be conveniently inserted into a gap between a gingiva and an alveolar bone, so that the connection between the gingiva and a dental crown neck as well as between the gingiva and an alveolar is completely cut and separated, and the end part of the extension part is a sharp end; and accurate puncture and combination of the starting point of the epithelium are facilitated, and damage to healthy tissues is reduced.
Owner:GUANGXI MEDICAL UNIVERSITY
Systems and methods for printing three-dimensional objects
Dental restoration technologies include dental prosthesis components such as implants, abutments, crowns, and the like that are mapped to a patient's mouth prior to and during installation. Fabricating at least a portion of one or more components of the dental prosthesis using a fully calibrated and characterized fabricator can reduce sources of error that affect the success of fabrication and installation processes. The components of the dental prosthesis are represented by library files that are tailored to reflect particular characteristics of the components of the prosthesis to be fabricated, the fabricator, the material used during fabrication, and / or the environment surrounding the fabricator. The library files may be determined based on an acquired scan of the patient and / or based on inputs received from a user during the design process. The library files may be generated using virtual modeling techniques, and / or based on a component design that falls within pre-determined parameters.
Owner:BIOMET 3I LLC
A photosensitive bioceramic-based additive manufacturing process for primary teeth
The application discloses a kind of based on photosensitive bioceramics deciduous tooth additive manufacturing forming process, it is related to ceramic deciduous tooth manufacturing technical field, comprising the following steps: using oral scanner to collect children's dental three-dimensional data, generate deciduous tooth restoration three-dimensional data model and export STL format deciduous tooth repair model;Using photosensitive liquid bioceramic composite material, through DLP photocuring 3D printing into initial blank, again through blue light three-stage resolidification and get blank body.In the process, the morphological characteristics of adjacent healthy deciduous teeth can be accurately extracted, and the crown height correction coefficient is automatically matched according to the age of the child, effectively compensating for the size deviation of the unerupted deciduous teeth, ensuring that the size error of the restoration is small, adjusting the occlusal surface morphology of the restoration according to the actual data of the teeth at the same time, making the occlusal contact area ratio higher, and reserving occlusal buffer space to avoid excessive local stress, significantly improving the mastication comfort and durability of the restoration.
Owner:HANGZHOU JISHU ADDITIVE MEDICAL TECHNOLOGY CO LTD
Dental crown batch printing device and method for implant abutment
The invention provides a dental crown batch printing device and method for an implant abutment. The method comprises the following steps: deeply optimizing gingival sampling data of a patient by utilizing a gingival form database, determining abutment arrangement characteristics of the patient and determining abutment printing data of the patient, creating a plurality of dental crown forms of the patient according to the proposed requirements of the patient and the abutment arrangement characteristics, constructing dental crown printing data corresponding to each dental crown form, and simulating a printing effect corresponding to each dental crown printing data according to the facial data of the patient, target dental crown printing data is selected according to the instruction, the abutment and the dental crown of the patient are printed according to the abutment printing data and the target dental crown printing data, and the laser power and the printing preparation work of printing equipment are automatically adjusted according to the requirements of the patient and the actual modeling result. Batch printing or personalized printing of the dental crown and the abutment can be realized, the printing efficiency is improved, and the quality of a printed finished product is ensured.
Owner:JIANGSU WANJIANG HIGH TECH CO LTD
Cleaning brush for dental implant
The invention relates to the technical field of electric toothbrushes, in particular to a cleaning brush for dental implants. Comprising a housing; the control switch is mounted on the outer wall of the shell; the mounting shell is arranged at the top of the shell; the sound wave motor is installed in the shell, and the sound wave motor is electrically connected with the control switch; and the rotating rod is rotationally connected to the interior of the mounting shell, an insertion hole is formed in the bottom of the rotating rod, an output shaft of the sound wave motor is inserted into the insertion hole, and a spiral groove is further formed in the upper end of the rotating rod. The sound wave motor can drive the rotating rod to do small-amplitude and high-frequency reciprocating forward and reverse rotation, the spiral groove in the rotating rod is matched with the ball on the inner side of the sliding sleeve, and rotation can be converted into transverse high-frequency reciprocating movement of the sliding sleeve and the first brush and the second brush connected to the sliding sleeve; the transverse movement direction is matched with the trend of an annular gingival margin area at the junction of a dental crown and gingiva of the implant tooth, so that bacterial plaque biofilms accumulated in a high-risk area can be effectively removed.
Owner:ZHEJIANG YA KANGJIAN TECHNOLOGY DEVELOPMENT CO LTD
Artificial ceramic implant for premolar
The utility model relates to the technical field of tooth implantation, in particular to an artificial ceramic implant for a premolar, which comprises an implant root implanted into a gum and an abutment connected with a dental crown, the implant root part comprises a smooth column head part, a threaded part and an implant neck part which are sequentially adjacent to one another from bottom to top; wherein the bottom end of the smooth column head is hemispherical; the upper surface of the neck part of the implant neck part is quadrilateral, the lower surface of the neck part is circular, and the side wall of the neck part is arc-shaped; and the base station is arranged on the upper surface of the neck part. The structure is implanted in a knock-in mode, the implanting operation time is short, the operation difficulty is low, postoperative recovery is fast, and the problems of intraoperative bleeding and postoperative swelling can be solved.
Owner:SHANGHAI HUCI TIMES DENTAL TECHNOLOGY CO LTD
Dental crown fixing abutment structure convenient to disassemble
The utility model discloses a dental crown fixing abutment structure convenient to disassemble, which relates to the technical field of medical equipment and comprises an implant retention screw, an abutment fixing seat is arranged on the outer side of the top of the implant retention screw, an abutment is butted on the abutment fixing seat, and a locking screw is arranged in the abutment. According to the dental crown fixing abutment structure convenient to disassemble, the abutment and the dental crown can be assembled and disassembled through fixing and disassembling of the locking screws, and the situation that the abutment is repeatedly taken and worn, mechanical stimulation is caused to gingival tissue when the abutment is taken off and worn, and local inflammatory response is induced is effectively avoided; multiple times of confirmation of in-position precision in the repeated wearing and taking-off process of the abutment are avoided, and the reworking frequency is reduced.
Owner:SHAANXI QIMEIRAN MEDICAL TECHNOLOGY CO LTD
Dental sets for molar intrusion and open bite treatment
To provide a dental set for open bite treatment, which can easily depress molars in a short period of time without causing extrusion of front teeth when it is necessary to depress molars in open bite treatment, thereby enabling open bite treatment. [Solution] The dental set for open bite treatment has a plurality of brackets (201) attached to the patient's maxillary or mandibular teeth, an orthodontic wire (11) attached to these brackets, and an intermaxillary elastic (400). When indenting a patient's maxillary molars, the intermaxillary elastic is stretched by attaching the orthodontic wire to the bracket attached to the crown of the maxillary canine from above and stretching it, then hooking it from below to the bracket attached to the crown of the mandibular canine, and further hooking it onto a bondable tube (202) attached to the crown of the mandibular first molar. The same applies when indenting a patient's mandibular molars.
Owner:CEPHMEDICAL
A three-dimensional implant crown intelligent selection and generation method based on U-Net
The application provides a three-dimensional implant crown intelligent selection and generation method based on U-Net, comprising the following steps: converting a three-dimensional tooth model in STL format into a high-resolution two-dimensional projection image; taking a U-Net network structure with VGG16 as a backbone network, combining a bar pooling module, and designing a neural network model for accurately capturing tooth sequential arrangement features; training the neural network model by using an adaptive learning rate adjustment strategy and a cosine annealing learning rate scheduling strategy, and performing semantic segmentation on the two-dimensional projection image to obtain a 2D tooth classification result image; identifying missing tooth labels based on the 2D tooth classification result image, calculating the center points of left and right adjacent teeth of the missing tooth, calculating the center position coordinates of the missing tooth in the 2D image through the center points of the left and right adjacent teeth, and mapping the center position coordinates to a three-dimensional space to obtain three-dimensional center coordinates of the missing tooth; and moving the template tooth center point to the three-dimensional center coordinates of the missing tooth to generate a three-dimensional crown model that matches the missing tooth position.
Owner:QINGDAO UNIV
Orthodontic treatment plan design assistance method based on tooth movement digital twin
This invention discloses an auxiliary method for orthodontic treatment planning based on a digital twin of tooth movement, belonging to the field of orthodontic auxiliary technology. The method includes acquiring cone-beam computed tomography (CBCT) data of the patient's oral cavity and three-dimensional point cloud data of the tooth crown surface to construct a three-dimensional geometric model of the tooth-periodontal ligament-alveolar bone. The three-dimensional geometric model is discretized into a finite element mesh, and based on the patient's age, periodontal biotype, and CT grayscale value, periodontal ligament viscoelastic parameters, alveolar bone grayscale-mechanical mapping parameters, and tooth linear elastic constants are assigned to form an individualized digital twin of tooth movement. A target displacement vector is determined within the individualized digital twin of tooth movement, and the orthodontic force vector and anchorage requirement index are calculated. The anchorage requirement index is used to assist in the design of the orthodontic treatment plan. This invention can effectively improve the accuracy, predictability, and personalization of orthodontic treatment plan design, reduce reliance on experience, and optimize the overall treatment effect.
Owner:TIANJIN DENTAL HOSPITAL
Force-regulated dental crown retrieval instrument
Owner:DR ANKEET NIWESH +9