56 results about "Veneer" patented technology

This invention relates to methods and devices for restoring teeth using fixed restorations. In particular, the invention provides a system, kit, and devices for the management of interproximal areas for traditional cementation and/or bonding of dental crowns, onlays, inlays, veneers and bridges. In the method, a barrier is positioned in contact with the tooth being restored and an adjacent tooth to cover a section of the tooth being restored and to create separation of the tooth being restored and the adjacent tooth. Cement is applied to the first mating surface of the fixed restoration and/or to the second mating surface of the tooth, and the first mating surface of the fixed restoration and the second mating surface of the tooth are positioned adjacent each other to seat the fixed restoration on the tooth. The barrier covers a section of the tooth being restored to prevent cement from bonding to the section of the tooth. This eliminates the need to remove hardened cement from this section of the tooth.

An improved lost wax method for fabricating dental devices, a prefabricated incisal veneer (1) is selected from among a group of said veneers having predetermined shapes, shades, and sizes. Wax is applied (2 and 3) to the incisal veneer to create a wax buildup onto a model (4) or prefabricated coping (5). Subsequently, a sprue is attached to the applied wax (2 and 3) and the wax buildup is removed from the model (4) for investing and burnout to create a lost wax mold. For a crown with a substructure, the incisal veneer (1) and the coping (5) are both cast in place with press ceramic, press thermoplastic material, or by injecting a curable resin, composite, or epoxy material into the lost wax mold.

The invention relates to a method (100, 200, 300) for producing a dental prosthesis (17) with a framework (3) and a veneer (15), in particular for producing a crown, a bridge, an inlay or an onlay. The invention further relates to a system (40, 50) for producing a dental prosthesis (17) with a framework (3) and a veneer (15) and to a corresponding computer program. To allow the dental prosthesis (17) to be produced in a short time and in uniform quality, irrespective of the skill of the operator, the following steps are provided: definition (110, 210, 310) of three-dimensional geometrical data of the veneer (15), provision (101) or preparation (218, 318) of the framework (3), production (120, 220, 320) of a model (5, 5a, 5b, 5c, 5d) of the veneer (15) on the basis of the three-dimensional geometrical data of the veneer (15), on the framework (3) or separately, formation (124, 224, 324) of a female impression (11) of the veneer (15) by inclusion (126, 226, 326) of the model (5, 5a, 5b, 5c, 5d) between the framework (3) and a shaping material (9), and then removal (128, 228, 328) of the model (5, 5a, 5b, 5c, 5d), and filling (130, 230, 330) of the female impression (11) with veneer material for producing the veneered dental prosthesis (17).

The invention relates to a dental composition comprising—filler (F1) comprising aggregated nano-sized particles in an amount of from about 30 to about 70 wt. %, —filler (F2) comprising agglomerated nano-sized particles in an amount from about 1 to about 20 wt. %, —hardenable component (A1) being an urethane(meth)acrylate with a functionality of at least 2 and having a molecular weight from about 400 to about 3,000 g/mol, —hardenable component (A2) being a radically polymerizable (meth)acrylate with a functionality of at least 2 being different from component (A1), —redox curing initiator system, the dental composition not comprising non-agglomerated nano-sized filler in an amount above about 10 wt. %, wt. % with respect to the weight of the whole composition. The dental composition is in particular useful as or for production of permanent crown and bridges, inlays, onlays and veneers.

The invention provides a dental restoration model manufacturing method based on a multi-source image, and the method comprises: determining a standard two-dimensional dental crown veneer correspondingto the edge form of a to-be-restored tooth based on the obtained edge form of the to-be-restored tooth of a face smile digital image, and obtaining a dental crown veneer two-dimensional digital model; then, adjusting the dental crown veneering two-dimensional digital model to obtain a two-dimensional simulation repair model conforming to facial smile characteristics; then, based on the two-dimensional simulation repair model and the intraoral dental crown three-dimensional digital model, obtaining a three-dimensional simulation repair model conforming to facial smile characteristics; and finally, based on a Dicom three-dimensional body model shot by oral cavity CBCT, registering and fusing with a three-dimensional simulation repair model to obtain a model, which can be used for clinical analysis such as dental crown repair measurement, tooth root change diagnosis and the like. The method can provide an effective guidance basis for dental restoration and tooth change prediction.

The invention relates to a cast porcelain tooth veneer production method which comprises the following steps of: constructing a diagnosis model by a digital three-dimensional technology, and producingthe diagnosis model in a three-dimensional printing manner; based on the diagnosis model, producing a diagnosis finish for a patient by utilizing a temporary crown material; carrying out tooth preparation, impression taking and die stone cast pouring on the patient to obtain a working model on the basis of the diagnosis finish, and carrying out three-dimensional scanning and centric occlusion registration on the working model; carrying out space registration on the working model after tooth preparation and the diagnosis model so as to enable two models to be completely fit in a back tooth region, and constructing an edge line of each preparation body in a differential region of a front tooth lip surface by utilizing an NURBs curve; obtaining a veneer in a three-dimensional printing manner; and carrying out dewaxing casting directly by utilizing the veneer so as to obtain a cast porcelain material veneer. The cast porcelain tooth veneer produced by the invention achieves unification ofaesthetics and functionality after repair.

Described is a customized removable cosmetic or aesthetic dental veneer that secures onto a row of teeth of a patient. The dental veneer may include a pair of rear portions that secure it onto the row of teeth, each rear portion positioned at a distal end of the veneer and having: buccal, occlusal and lingual sides for one or more rear tooth, and a front portion between the pair of rear portions that covers the buccal and occlusal surfaces of the teeth between the pair of rear portions but is free of a side that covers a majority of the lingual surface of any tooth of the row of teeth between the pair of rear portions. A slot and apertures may also be provided for occlusal portions of the rear teeth. Also described is a veneer without such rear portions, which may be used with an adhesive.

The invention provides a connecting assembly with good stability, and relates to the technical field of decoration design. The connecting assembly comprises a first connecting piece and a second connecting piece, wherein the second connecting piece comprises a bottom plate and a clamping plate; the side face of the clamping plate is provided with a sliding groove; the first connecting piece is provided with a protruding block; the width of the sliding groove is larger than the thickness of the protruding block; the first connecting piece is provided with an adjusting plate; an adjusting hole is formed in the adjusting plate; a first groove and a second groove are formed in the clamping plate; the second groove communicates with the first groove; a functional plate extending in the direction of the first groove is arranged in the adjusting hole; a functional rod connected with the functional plate is arranged in the second groove; first clamping teeth are arranged on the side edge of the functional plate; and second clamping teeth meshed with the first clamping teeth are arranged on the outer side of the functional rod. According to the invention, the structure is simple, the assembly type installation efficiency is high, the position of a veneer can be adjusted after the veneer is installed, no gap exists between the veneer and a wall body, the stability is good, and the safety is high.

The present invention relates to a novel multi-layered zirconia dental blank comprising at least two reverse layers. Further, the invention relates to a process for the preparation of such a multi-layered zirconia dental blank. The invention also relates to the use of such a multi-layered zirconia dental blank for the production of a dental article. Preferred dental articles are artificial teeth, inlays, onlays, bridges, crowns, veneers, facings, crown frameworks, bridged frameworks, implants, abutments, copings or orthodontic appliances. Moreover, the invention relates to a process for producing a dental article out of such a multi-layered zirconia dental blank.

A dental matrix includes an outwardly extending column, which is engaged by an instrument, allowing the dentist to move the instrument and maneuver the matrix into position on the operative tooth to create a cavity for the veneer. The cavity is filled with curable material, which is cured by light, such as ultraviolet light, and once curing is complete, the matrix is removed from the tooth, which now has the veneer formed thereon.

The invention discloses a positioning piece for controlling installation deformation of a marble veneer. The positioning piece comprises the marble veneer, wherein a plurality of grooves are formed inthe back surface of the marble veneer; T-shaped positioning pieces are installed in the grooves through adhesives; each T-shaped positioning piece comprises a vertical plate and a horizontal plate which are distributed in a right-angle mode; a first through hole and a second through hole are formed in each vertical plate and the corresponding horizontal plate respectively; the vertical plates areinserted into the grooves and are fixedly connected through the adhesives; and the adhesives sequentially overflow from the first through holes to the second through holes under the extrusion of thevertical plates, and are flattened and cured to form rubber nail caps. An installation method of the positioning piece for controlling the installation deformation of the marble veneer comprises the following steps that the positions and the sizes of the grooves in the back surface of the veneer are determined, and the adhesives are added into the grooves; the vertical plates of the T-shaped positioning pieces are pressed into the grooves, and the adhesives in the grooves overflow from the second through holes under the extrusion of the T-shaped positioning pieces; the overflowing adhesives are flattened and cured to form the rubber nail caps; and the stable and deformation-resistant marble veneer is formed.

The invention provides a false tooth veneering manufacturing method. The false tooth veneering manufacturing method comprises the following steps: acquiring tooth image data, false tooth demand data and tooth-exposed smile picture data of a patient; analyzing the tooth image data to generate preoperative tooth three-dimensional data; obtaining original denture veneering template data according to the denture demand data; according to a Bezier curve calculation rule, the preoperative tooth three-dimensional data and the tooth exposure smile picture data, adjusting original denture veneering template data, and generating target denture veneering data; generating a cutting strategy of the target denture veneer according to the target denture veneer data and a preset cutting processing rule; and according to the cutting strategy of the target denture veneer, controlling cutting equipment to perform cutting operation on the to-be-processed tooth model so as to obtain the target denture veneer. The method directly depends on computer software to calculate and obtain the target denture veneering data, the automation degree is high, the denture design efficiency and precision are improved, and then the follow-up denture veneering manufacturing efficiency and precision are improved.

The invention discloses a veneer longitudinal splicing process and machine. The veneer longitudinal splicing machine comprises a main frame, a tooth cutting device, a tooth cutting transmission device, a board discharging transmission device, a clamping board moving device, a gluing device, a tooth connecting device and a fixed-length cutting device. The horizontal distance between the tooth connecting device and the tooth cutting device is limited to be 35-60 cm, the displacement distance existing after toothing before splicing of veneers is reduced, errors are reduced, and tooth connecting precision is improved; a good tooth connecting effect can be achieved for wood boards with the tooth length of 3cm after tooth combing, the consumption of materials at the tooth connection end parts ofthe veneers is reduced, and the utilization rate of the veneers is improved; the occupied space of the complete machine equipment is reduced, the weight of the complete machine equipment is reduced,and the material consumption cost and the transportation cost of equipment products are reduced; and the application range is wide, multiple veneers with different lengths can be longitudinally spliced by a single splicing machine, and veneers with different thicknesses and veneers adhered with impurities can be longitudinally spliced.