12 results about "Dental crowns" patented technology

The application provides a digital oral model mark point recognition method and device and electronic equipment, and the method comprises the following steps: step 1, inputting dental arch model image data, segmenting the dental crown of the dental arch model, and recognizing the tooth position number of the dental crown, wherein the dental arch model comprises a gum and dental crowns of different tooth positions. Step 2, based on automatic recognition of the dental crown mark point of a single dental crown, for each segmented dental crown, the multi-view graph network is used to automatically recognize the dental model mark point, and the mark point on each dental crown is obtained. The method of the application does not predict the mark point on the three-dimensional point cloud, but maps the three-dimensional data into two-dimensional projection image data, and calculates by using a two-dimensional network, so that the calculation amount and the dependence on the computing power can be reduced compared with a three-dimensional network.

The invention provides a low-viscosity resin composition with biocompatibility as well as a preparation method and application thereof, and relates to the technical field of temporary dental crown resin materials. The low-viscosity resin composition with biocompatibility is prepared from the following components in parts by weight: 10 to 40 parts of acrylate resin, 30 to 60 parts of reactive diluent, 10 to 50 parts of modified filler, 0.5 to 2.5 parts of photoinitiator and 0.5 to 5 parts of auxiliary agent, the modified filler is a titanate coupling agent modified nanofiller, and the titanate coupling agent modified nanofiller comprises a nanofiller core and a monomolecular titanate coupling agent coating layer coating the surface of the nanofiller core. The resin composition for the temporary dental crown, provided by the invention, is relatively low in viscosity and excellent in flowability, and is beneficial to material printing and forming; meanwhile, it is guaranteed that the prepared material has good biocompatibility and mechanical strength.

The invention discloses ceramic slurry for 3D printing of a dental crown and a preparation method of the ceramic slurry. The ceramic slurry comprises the following components: photosensitive resin, a diluent, a dispersing agent, a defoaming agent, a photoinitiator and ceramic powder, the preparation method comprises the following steps: S1, firstly, adjusting a mixing environment, and adjusting the mixing temperature to 30-40 DEG C; uniformly stirring photosensitive resin, a photoinitiator and a diluent at a high speed in a dark place, and mixing to obtain a photosensitive resin system; s3, adding ceramic powder, a dispersing agent and an auxiliary agent into the photosensitive resin system, dispersing to obtain slurry, and finishing printing of a dental implant biscuit under the control of forming software; s8, performing drying, degreasing and high-temperature sintering on the biscuit to obtain the dental crown implant; a dental crown ceramic green body formed by 3D printing of the ceramic slurry has very high hardness, the green body precision is high, and the printing success rate is high. The internal grain size is reconstructed through a degreasing and sintering thermal reaction, and the degreased and sintered ceramic dental crown can be accurately worn on a dental cast.

The front tooth guide plate type magnetic open-face retainer comprises a first tooth socket and a second tooth socket opposite to the jaw, the rear tooth occlusal surfaces and the front tooth incisal ends of the first tooth socket and the second tooth socket are provided with windowing structures, and the front tooth tongue side of the first tooth socket is provided with a first front tooth guide plate. A second anterior tooth guide plate opposite to the first anterior tooth guide plate is arranged on the anterior tooth tongue side of the second tooth socket; and opposite magnets which are magnetically attracted are respectively arranged on the first anterior tooth guide plate and the second anterior tooth guide plate. The anterior tooth guide plate has the beneficial effects that a tooth position and jaw position dual-maintaining effect can be achieved, the complete dentition is wrapped to prevent recurrence such as crowding, twisting and gaps, meanwhile, the lower jaw reconstruction position and the occlusion relation can be maintained through the anterior tooth guide plate and the magnetic force of the magnet, meanwhile, the anterior tooth guide plate can also control the vertical growth trend of teeth of a deep overjaw patient, and the aim of maintaining the tooth position and the jaw position is achieved. Recurrence of deep overjaw is prevented; manufacturing is easy, time can be saved, efficiency is improved, and commercialization is facilitated.

The utility model relates to the field of dental orthodontics, provides an orthodontic bracket transfer device, and aims at solving the problems that in the transfer process of an existing bracket, after the bracket is manually positioned, the bracket is transferred into a transfer tray for diaphragm manufacturing, the treatment process is tedious, time consumption is long, and errors are difficult to avoid. The system comprises a tooth positioning model which is provided with a plurality of tooth positions, and each tooth position is provided with a tooth surface and a tooth crown; the bracket positioning parts are respectively arranged at the corresponding tooth positions and below the tooth surface, positioning grooves corresponding to the brackets are formed in the top ends of the bracket positioning parts, and the positioning grooves are used for being connected with the brackets for the first time; the plurality of positioners are respectively arranged above the corresponding bracket positioning parts and are used for sleeving the corresponding dental crowns, bracket clamping parts corresponding to the bracket positioning parts are arranged on the positioners, clamping arms are arranged on two sides of each bracket clamping part, and the clamping arms are used for transferring and connecting brackets.

This invention discloses a device and method for measuring occlusal force of a dental crown, belonging to the field of oral restoration technology. It includes an installation cavity on the inner side of the crown body adapted for clinical implant abutments or natural tooth preparations to accommodate a pressure sensing module, with the cavity layout avoiding stress concentration areas on the inner side of the crown. Occlusal force distribution and peak force are collected through a multi-array layout of the inner pressure sensing modules. The pressure sensing modules employ multi-layer biocompatible encapsulation and integrate a temperature drift compensation unit. The pressure sensing modules are connected to a transmission unit, which transmits the collected occlusal force data to a data processing terminal. The data processing terminal integrates an anomaly warning module and an intelligent analysis module. This invention has the advantages of in-situ monitoring, high precision, durability, and ease of maintenance.

The invention belongs to the technical field of dental restoration material manufacturing, and particularly relates to beta-spodumene and lithium metasilicate co-doped and modified dental lithium disilicate glass ceramic as well as a preparation method and application thereof. Beta-spodumene powder, lithium metasilicate seed crystal and lithium disilicate mother glass powder are used as raw materials, slurry is cured layer by layer by adopting a photocuring additive manufacturing technology, and then co-doping modification of the beta-spodumene powder and lithium metasilicate is synchronously realized through degreasing, nucleation, crystallization and liquid-phase sintering, so that the lithium metasilicate co-doped modified beta-spodumene powder is obtained. The prepared beta-spodumene and lithium metasilicate co-doped and modified dental lithium disilicate glass ceramic has the characteristics of high compactness, high flexural strength, high fracture toughness, good clinical suitability and the like. The problems that traditional lithium disilicate glass ceramic is low in fracture toughness, and additive manufacturing ceramic is insufficient in compactness and strength are effectively solved, and the method is suitable for manufacturing high-precision personalized dental prostheses such as dental crowns and bridges.

1. Name of the product in this design: Stainless steel dental crown (gold, white, rainbow). 2. Application of this design: Stainless steel dental crowns with a novel colored outer surface, which can improve patient acceptance. 3. The key design features of this product are the combination of shape and color. 4. The picture or photo that best illustrates the key design points: Design 3 3D diagram 1. 5. The design for which protection is sought includes color. 6. Design 1 is designated as the basic design.

The invention relates to an invisible correction device for bidirectional jaw regulation and control. Comprising an upper jaw appliance body and a lower jaw appliance body, the upper jaw appliance body comprises a first body part, a first protruding part and an arch expanding part which are integrally formed, and a first guiding inclined face is arranged behind the first protruding part; the lower jaw appliance comprises a second body part and a second convex part which are integrally formed, and a second guide inclined surface is arranged in front of the second convex part; the first guide inclined surface and the second guide inclined surface are attached to each other when the user occludes the jaw, and the first lug boss and the second lug boss jointly guide the functional retreat of the lower jaw; the arch expanding part is provided with an arch structure attached to the palate of a user, the upper surface of the arch structure abuts against the palate of the user and acts on dental crowns on the two sides in the transverse direction, expanding force is provided for the left side and the right side at the same time, and therefore the maxillary dental arch is expanded. Through the integrated and complete-cycle correction system, the limitations of overlong treatment course, poor correction experience, jaw bone and dentition control separation and the like in the existing two-stage correction mode are overcome.

A handheld vise for dental crowns includes a vise block, an elongated handle extending from the vise block, a linear screw embedded in the vise block, and first and second jaws. The second jaw may be arcuate on a gripping surface thereof to conform to the shape of a dental crown. The handheld vise is sized for quickly and readily securing a dental crown such as a stainless-steel dental crown for use in pediatric dentistry. An elastomeric material may be used on the gripping surfaces of the vise. A radius of curvature of the gripping surface of the second jaw may be between about 25-35 mm. A height of the jaws may be between about 2-5 mm, and a distance between the first jaw and a vertex of the second jaw may range from about 3-10 mm. A method and kit for forming crowns including the handheld vise are disclosed.

The utility model discloses a traction orthodontic device for assisting tooth movement. The traction orthodontic device comprises a bracket, a traction hook and an anchorage nail, the brackets are detachably adhered to the surfaces of dental crowns, and a plurality of brackets positioned on different dental crowns are connected in a penetrating manner through transversely arranged arch wires; the traction hook is inserted into the bracket, the traction hook comprises an insertion rod inserted into the bracket and a square hook body which is arranged at the top end of the insertion rod and is horizontally arranged, an adjusting rod is inserted into the corresponding bracket to be treated, and a strip-shaped connecting ring is horizontally arranged at the top end of the adjusting rod; the anchorage nail is connected with one end of the strip-shaped connecting ring through a rubber band, and the hook body is connected with the other end of the strip-shaped connecting ring through a tension spring. According to the orthodontic device for assisting tooth movement traction, through ingenious design, the treatment effect is guaranteed, meanwhile, the comfort of a patient and the operation convenience are taken into account, and the orthodontic device has high clinical application value.

The invention relates to a computer-implemented method, a system and a computer program product for supporting preoperative planning of placement of a dental implant in a patient's jaw. A dental axis representation, a dental crown representation and / or an implantation axis representation is generated using a provided digital 3D surface visualization, e.g. a digital plaster model, at least part of the existing dental crowns and / or the oral mucosa of the patient and statistical parametric 3D shape models (SSM). This is done based on the digital 3D surface visualization and the corresponding statistical parametric 3D shape model. In addition, the method, system and computer program product can also be used to generate a corresponding statistical parametric 3D shape model. For a plausibility check, the determined representations for the tooth axis, crown and / or implantation axis can be displayed in an additionally recorded 2D X-ray image, e.g. an orthopantomogram.