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571 results about "Tooth crown" patented technology
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Three-dimensional clinical research method of deciduous tooth anchorage on maxilla hypoplasia under guidance of HPC (High Performance Concrete) line
The invention discloses a three-dimensional clinical research method of deciduous tooth anchorage on maxilla hypoplasia under the guidance of an HPC line. According to the invention, the deciduous tooth anchorage technology guided by the HPC line breaks through the limitation of the traditional tooth support type and bone support type correction, and creates a third anchorage selection mode for osteomalocclusion. By accurately positioning the central axis of the deciduous tooth crown as a supporting point, the technology not only retains the effectiveness of the traditional method on the transverse expansion of the maxilla, but also remarkably reduces the side effects of mesial inclination, vertical lifting and the like of the permanent tooth, and realizes the dual purposes of bony reconstruction and dentition stabilization. The innovativeness is that the physiological characteristics of deciduous teeth are combined with the biomechanical principle, the technical scheme is provided for the first time in China, the blank of correction of complex malocclusion in mixed dentition is filled, and a safer and more efficient treatment path is provided for clinic.
Owner:SHAOXING DENTAL HOSPITAL
Method for measuring buccal-lingual torque value of maxillary molar based on improved ResNET
The embodiment of the invention discloses a method for measuring a buccal-lingual torque value of maxillary molar based on improved ResNET. The method comprises the following steps: acquiring and preprocessing three-dimensional images of teeth and alveolar bones, and performing three-dimensional reconstruction on the preprocessed images; based on the coupling relationship between the dental crown and the tooth root, positioning a first tooth long axis; positioning a second tooth long axis based on the coupling relationship between the tooth and the alveolar bone; calculating an included angle between the first tooth long axis and the second tooth long axis and generating a new long axis; calculating and verifying a buccal-lingual torque value of the maxillary molar; through the automatic process, the accurate measurement and calculation of the upper jaw first molar torque value are realized, and the effectiveness and accuracy are improved.
Owner:NINGBO DENTAL HOSPITAL CO LTD
Tooth model set and multi-layer root canal therapy practice model
The utility model provides a tooth model kit and a multi-layer root canal therapy practice model. A hard tissue part of a teaching tooth model is made of a colorless transparent printing material, and a soft tissue part of the teaching tooth model is made of a colored printing material. The hard tissue part of the endodontotomy practice model is made of a non-transparent 3D printing material, and the dental pulp part is made of a colored printing material with the color different from that of the hard tissue part. The dental crown part of the root canal therapy practice model is made of a non-transparent printing material, the dental root part is made of a colorless transparent printing material, and the dental pulp part is made of a colorless transparent adhesive body ground printing material. A dental crown part of the multi-layer root canal therapy practice model is made of a non-transparent printing material, a tooth root part is made of a colorless transparent printing material, a semitransparent colored layer with a preset thickness is arranged at the position, close to a dental pulp part, of the tooth root part, and the dental pulp part is made of a colorless transparent adhesive body ground printing material. The tooth model kit provided by the utility model is higher in simulation degree on teeth, and the simulation result is displayed more clearly.
Owner:PEKING UNIV SCHOOL OF STOMATOLOGY
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
Socket forming tools for autotransplantation
PendingUS20250262033A1Dental implantsAdditive manufacturing apparatusTooth autotransplantationBiomedical engineering
A socket preparation tool configured to facilitate autotransplantation of a donor tooth to a recipient site is provided. The socket preparation tool includes a tooth replica of the donor tooth. A coronal portion is optionally included for facilitating alignment of the tooth replica adjacent teeth during a simulated autotransplantation. A radicular portion includes a smooth surface configured to facilitate compression of soft bone or soft tissue of the tooth replica or a contoured surface adapted for filing or cutting bone of the tooth replica. A cylindrical attachment is configured to be coupled to the tooth replica, such as via a receiver. A method of guided autotransplantation of a donor tooth via the customized socket preparation tool includes at least fitting and adjusting the socket preparation tool coupled to the tooth replica in the recipient site, before extracting the donor tooth.
Owner:FORM & FUNCTION DENTAL SERVICES P C
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
A biomimetic enamel composite material, preparation method and application
The present invention discloses a biomimetic enamel composite material, which is a composite of ceramic hydroxyapatite nanowires and a polymer organic polymer assembled in an oriented manner; the biomimetic enamel composite material has a multi-level, multi-scale, and multi-component overall orientation structure; the hardness of the biomimetic enamel composite material is 2.5 - 5.5 GPa, the modulus is 40 - 60 GPa, the viscoelastic loss factor is tanδ = 0.03 - 0.04, and the viscoelastic quality factor is 1.5 - 2.5. The biomimetic enamel composite material is used as an upper restoration material for oral medical implants and is used for the integrated preparation of oral implant abutments and crowns. The present invention also discloses a preparation method of the biomimetic enamel composite material. The present invention has broad application prospects in clinical dental crowns, upper healing abutments of oral implants, repair abutments, and abutment integrated crowns in oral medicine.
Owner:SHANGHAI NINTH PEOPLES HOSPITAL SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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
Orthodontic micro-implant nail implanting method, device and system and storage medium
The invention discloses an orthodontic micro-implant nail implanting method, device and system and a storage medium. The method comprises the following steps: S1, acquiring CBCT three-dimensional data; and S2, analyzing CBCT three-dimensional data through AI artificial intelligence to calculate an optimal implantation site and an implantation direction path, and designing an implantation guide plate mounted on the surface of the dental crown. By the adoption of the technical scheme, the success rate of implanting the micro-implant nail is increased, relevant soft and hard tissue indexes in the CBCT three-dimensional image are integrated, and the burden and judgment errors of an orthodontic doctor in measurement and positioning are reduced.
Owner:HOSPITAL OF STOMATOLOGY SUN YAT SEN UNIV
Three-dimensional dental model deep coverage deformity quantification method and related device
The invention belongs to a tooth deformity quantification method, and provides a three-dimensional tooth jaw model deep coverage deformity quantification method and a related device aiming at the problems that a distance index measurement method for representing an upper and lower jaw coverage relation in an existing three-dimensional tooth jaw model is time-consuming, the measurement precision is difficult to guarantee, and the method excessively depends on subjective judgment of a doctor. Sequentially obtaining a projection point set in the occlusal surface direction of the tooth area, a central point of the projection point set in the occlusal surface direction of each tooth area and a global central point of the tooth model, then calculating a rotation amount based on the data, performing quaternion transformation, obtaining an identification line capable of representing a crest cutting position of each tooth crown, fitting the identification line of each tooth crown, and obtaining a crest cutting position of each tooth crown; the method comprises the following steps: obtaining two tooth crest cutting distribution curves, performing alignment processing on the two tooth crest cutting distribution curves, obtaining a matching point set through resampling, and obtaining a tooth jaw covering horizontal spacing according to the matching point set. The problem of precision loss in a traditional transformation method is effectively avoided, and the precision of tooth pose adjustment is ensured.
Owner:CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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
Intraoral scanning interactive segmentation method based on adaptive curvature
The invention relates to the technical field of computer graphic processing, in particular to an intraoral scanning interactive segmentation method based on self-adaptive curvature, which comprises the following steps: importing a three-dimensional model into a system, calculating the curvature value of each vertex by the system by adopting a self-adaptive curvature analysis method, and identifying and extracting a gingival margin line part; correcting an inaccurate part through an interactive interface to ensure the continuity and accuracy of the gingival margin line; gradually expanding adjacent vertexes and patches which conform to a curvature threshold based on the seed points, and extracting a complete gingival margin line; accurate control on the form of the gingival margin line is realized through a self-adaptive curve fitting morphological processing method; the system uses a connected component detection algorithm to identify and segment the independent dental crown area, and each connected component is classified into an independent dental crown or gingival area to realize segmentation. According to the method, curvature analysis and a small amount of manual interaction are combined, so that the method can adapt to diversified tooth forms and maintain relatively high segmentation precision.
Owner:BEIJING UNIDRAW VR TECH RES INST CO LTD
Head cap with removable backstrap and method of use
A head cap with a removable back strap, comprising a crown, a visor, a back strap, one or more fastening mechanisms, and one or more stretchable components. The crown partly covers the head on the front side and includes one panel or multiple panels attached together in a preconfigured pattern. The back strap includes a first end and a second end, and is removably attached to the crown using the fastening mechanism that facilitates attaching and removing the back strap to the crown. Moreover, this two-part design allows for the interchangeability of headcaps (Part 1) with backstraps (Part 2) thus facilitating the use of an appropriate logo for the occasion. When reversed on the head, this head cap can appear as, and can become, a “bandana”.
Owner:CARLTON LAWRENCE G
Artificial crown and manufacturing method thereof
To disclose an artificial crown having a structure of providing a mechanical bonding force in a process of attaching cement to an inner surface, and a manufacturing method of the artificial crown.SOLUTION: An artificial crown according to the present invention includes: a molded body 10 inserted and attached to an abutment tooth and having a connection groove 10a to be inserted to the abutment tooth formed therein; and a plurality of pattern parts 20 formed so as to be inclined by a predetermined depth and drawn in an inner surface of the molded body so as to accommodate an adhesive for joining the molded body to the abutment tooth.SELECTED DRAWING: Figure 2
Owner:BIOCETEC
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
A Method for Tooth Three-Dimensional Digital Model Registration and Tooth Neckline Extraction Based on Intraoral Scanning and CBCT
The present invention discloses a method for registering three-dimensional digital tooth models and extracting dental cervical lines based on oral scanning and CBCT, which relates to the field of registering three-dimensional digital tooth models. The method includes: respectively obtaining three-dimensional oral cavity images of oral scanning and CBCT, and automatically segmenting the three-dimensional structures of the dental crown and teeth by using the pre-trained V-Net and ToothNet image segmentation models. Then, through the feature extraction network, information exchange network and rigid transformation network, the alignment and registration of the two-modal images are realized. The feature extraction network uses far-point sampling and dynamic graph convolutional neural network to extract local and global features, and the self-attention and cross-attention modules perform feature enhancement and information exchange between the same modality and different modalities. Based on this registration result, the dental cervical line is further extracted and optimized. This method can not only quickly and accurately register three-dimensional digital tooth models, provide high-precision dental cervical line extraction results, but also reduce the labor and time costs of medical institutions and improve medical efficiency.
Owner:CHONGQING UNIV OF POSTS & TELECOMM +1
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
Accessory mounting system and accessory
The embodiment of the utility model provides an accessory mounting system and an accessory, the accessory mounting system comprises an accessory template and a separator, the accessory template comprises a first tooth accommodating cavity for accommodating at least part of teeth of a patient, an extension part extending from the gingival end of the first tooth accommodating cavity to the gingival side and a first accessory cavity, the first accessory cavity comprises a tooth accessory cavity arranged in the first tooth accommodating cavity and a gingival accessory cavity arranged in the extension part, and the tooth accessory cavity is communicated with the gingival accessory cavity. At least part of the isolation piece is located between the gingival accessory cavity and the gingiva so that the accessory formed by the first accessory cavity can not make contact with the gingiva. According to the accessory installation system in each embodiment of the invention, the installation of a large accessory exceeding the dental crown part on the tooth is realized, and the condition that the accessory is in contact with the gingiva or extrudes the gingiva after being installed is avoided.
Owner:ZHEJIANG YINCHILI MEDICAL TECH 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
Diamond compact, and drill bit
The present disclosure relates to a diamond compact, comprising: a tooth sleeve, which has an annular cross-section; a blocking disc, which is coaxially fixed to an opening at one end of the tooth sleeve, a tooth lock body being fixed on the inner side of the blocking disc; and a tooth body, which comprises a bearing segment, a base and a tooth crown, wherein the head end surface of the bearing segment is integrally connected to the tail end surface of the base; a lock slot is formed in the tail end surface of the bearing segment, and the tooth crown is fixed to the head end surface of the base; the length of the lock slot is less than the length of the tooth body in the axial direction of the tooth body, such that the lock slot is of a blind hole structure; and the tooth body is mounted within the tooth sleeve, the tooth lock body is axially locked with the lock slot, and the tooth body is rotatable relative to the tooth lock body.
Owner:KINGDREAM PLC CO +1
Facing crown and wax cover for making facing crown
To provide a facing crown capable of making the strength of an upper jaw front tooth equal to the occlusal force of a molar, and a wax cover capable of efficiently shaping a wax pattern formed in the process of manufacturing the facing crown.SOLUTION: A facing crown 30 to be attached to an upper jaw front tooth 11 is provided with a metal frame 32, and a step part 34 with which the top part of a lower jaw front tooth 21 is brought into contact is formed on the tongue side of the metal frame 32 when attached to the oral cavity. In a wax cover 40 used when the facing crown 30 is manufactured, a molding stepped part 45 having a shape similar to the shape of a stepped part 34 of the metal frame 32 is formed in a cutting edge part 44 of the wax cover 40.SELECTED DRAWING: Figure 1
Owner:医療法人社団みなと会