31 results about "Dental enamel" patented technology

The invention discloses an anti-caries early warning method and system based on oral health detection, and belongs to the technical field of data processing. The method comprises the following steps: acquiring and processing target detection data to generate a clear enamel demineralization feature image and a buffer capability score; analyzing pixel-level fluorescence intensity distribution by adopting a convolutional neural network model, determining a quantized value of the enamel demineralization degree, and further determining a comprehensive dental caries risk level category; judging a risk change trend according to the historical target detection data sequence to obtain a dynamic evaluation update value; a data fusion algorithm is adopted to obtain a final decayed tooth risk assessment index, and risk early warning information is generated according to the early warning template; by integrating fluorescence imaging, an image enhancement algorithm, a convolutional neural network, spectral analysis, k-means clustering and time sequence analysis, a complete process from enamel demineralization feature extraction to comprehensive risk assessment is constructed, the accuracy and individuation level of decayed tooth risk assessment are remarkably improved, and a scientific basis is provided for early prevention and intervention.

The invention provides an aluminum-based bionic composite material with a titanium alloy as a skeleton reinforcement phase and a preparation method of the aluminum-based bionic composite material, and belongs to the field of metal-based composite materials. The aluminum-based bionic composite material with the titanium alloy as the framework reinforcement phase comprises an aluminum matrix and the titanium alloy framework reinforcement phase. The titanium alloy skeleton reinforced phase is of a porous structure with the characteristics of a bionic tooth enamel columnar microstructure, and the porous structure is cylindrical through holes which are densely distributed; the aluminum matrix is filled in the cylindrical through hole; the volume percent of the titanium alloy framework reinforcement phase in the aluminum-based bionic composite material with the titanium alloy as the framework reinforcement phase is 30-80%. The tensile strength of the aluminum-based bionic composite material can reach 811 MPa, the percentage elongation after fracture can reach 10.3%, the bending strength can reach 1491 MPa, the fracture toughness can reach 47 MPa.m < 1 / 2 >, and the aluminum-based bionic composite material shows an excellent toughness synergistic effect.

Disclosed herein are exemplary embodiments of electrically insulated conductors and exemplary methods for electrically insulating conductors, such that the resulting electrically insulated conductors are resistant to partial discharge (PD), and thereby suitable for PD resistant design schemes (e.g., 800 V or above electric motors, etc.). An exemplary method includes applying an enamel coating along an electrical conductor, wrapping an electrically insulative tape around the enameled electrical conductor, and heating sealing the tape-wrapped, enameled electrical conductor to help ensure good adhesion of the electrically insulative tape to the enamel coating. The electrically insulative tape comprises polyimide and a sufficient amount of an electrically insulative, corona resistant filler for PD resistance. The tape-wrapped, enameled electrical conductor is resistant to partial discharge (PD), e.g., suitable for use in a stator winding of an 800 volt or above electric motor, etc.

Disclosed herein are exemplary embodiments of electrically insulated conductors and exemplary methods for electrically insulating conductors, such that the resulting electrically insulated conductors are resistant to partial discharge (PD), and thereby suitable for PD resistant design schemes (e.g., 800 V or above electric motors, etc.). An exemplary method includes applying an enamel coating along an electrical conductor, wrapping an electrically insulative tape around the enameled electrical conductor, and heating sealing the tape-wrapped, enameled electrical conductor to help ensure good adhesion of the electrically insulative tape to the enamel coating. The electrically insulative tape comprises polyimide and a sufficient amount of an electrically insulative, corona resistant filler for PD resistance. The tape-wrapped, enameled electrical conductor is resistant to partial discharge (PD), e.g., suitable for use in a stator winding of an 800 volt or above electric motor, etc.

This invention discloses a method, apparatus, medium, and device for evaluating the acid-resistant repair effect of tooth enamel, relating to the field of dental prosthetics. The method includes: constructing an energy accumulation distribution model and a heat conduction model in tooth tissue under erbium laser irradiation; obtaining a calculation model for the carbonate loss distribution of tooth enamel based on the decomposition reaction of carbonated hydroxyapatite in tooth enamel at high temperatures; constructing a photo-thermal-chemical coupled two-dimensional analysis model of tooth enamel under erbium laser irradiation based on the above model; performing simulation calculations on the photo-thermal-chemical coupled two-dimensional analysis model to determine the two-dimensional temperature distribution and carbonated hydroxyapatite loss distribution inside the tooth enamel under different erbium laser intensities and frequencies, thereby determining the acid-resistant repair effect of tooth enamel. This method fills the gap in the prior art lacking quantitative evaluation methods and solves the problem of difficulty in scheme design due to the inability to accurately correlate laser parameters with the acid-resistant repair effect.

A dental anhydrous varnish composition including at least one calcium silicate compound, preferably in an amount ranging from 0.1% to lower than 20% by weight relative to the total weight of the composition, at least one film-forming agent, and at least one volatile organic solvent. Also, composition's use in the treatment and / or the prevention of hypomineralization related pathologies. Further, a dental product and to a dental adhesive film.

The present invention relates to a glass-ceramic article comprising at least one substrate, such as a plate, made of glass-ceramic, said substrate being coated in at least one area with at least one enamel coating such that:1) the enamel has a gloss at 60° of less than 40,2) the coverage rate of said enamel in said area coated with said coating is 40 to 80%,3) said enamel comprises pigments in the form of mica and / or aluminum oxide and / or silica particles coated with metal oxides or combinations of metal oxides,4) said enamel has a roughness Ra greater than or equal to 0.4 μm,5) said enamel has a roughness Rt greater than 4 μm.

The present invention relates to a method for producing a dental restoration by jet printing, comprising the steps of jet printing (S101) a dentin core of the dental restoration using a plurality of opaque ceramic slips having mutually different colors; and jet printing (S102) the enamel of the dental restoration using a translucent ceramic slip.

A method for manufacturing an item (1) comprising a through-decoration (2) forming a so-called backlit plique-à-jour enamel, the method including obtaining a blank (5); removing part of the blank (5) from the inner face (5b) of the blank (5) to produce a decoration (2a) that does not pass through to the outer face (5a); depositing, from the inner face (5b), one or more layers of enamel (3) within the non-through decoration (2a); depositing, from the inner face (5b), a layer of luminescent material (4) on the enamel (3); depositing a protective layer (6) on the layer of luminescent material (4); and machining the outer face (5a) to reveal the enamel. Also, the related item.

The utility model provides a novel adjacent surface glaze removing tool which comprises a first retention frame and a second retention frame, a connecting strip is fixed to the top of the first retention frame, a connecting groove is formed in the top of the second retention frame, and the connecting strip can be inserted into the connecting groove in a sliding mode to enable the first retention frame and the second retention frame to form an arch-shaped retention frame. The inner side of the second retention frame is connected with a stud, the stud is in threaded connection with a rotary knob, the rotary knob can rotate on the stud to abut against the first retention frame, a first clamping groove is formed in the bottom of the first retention frame, a second clamping groove is formed in the bottom of the second retention frame, and sand strips are clamped in the two clamping grooves. A frame body of the first retention frame is hinged to a first clamping sleeve used for clamping one end of a sanding strip located at the bottom of the first retention frame, a frame body of the second retention frame is hinged to a second clamping sleeve used for clamping the other end of a sanding strip located at the bottom of the second retention frame, and a supporting rod is arranged on the side face of the top of the second retention frame. According to the invention, the adjacent enamel grinding operation can be carried out through the support rod extending out of the oral cavity.

The present application discloses a mineralization material for treating dentin hypersensitivity and promoting epitaxial growth of enamel, and its use, which comprises, by weight, 5-72 parts of a membrane-forming protein or PEGylated membrane-forming protein, 4-67 parts of a water-soluble disulfide exchanger, and 1-21 parts of a pH adjuster. The present application first proposes using a non-toxic disulfide exchanger (e.g., cysteine ​​(Cys)) to react with a membrane-forming protein or PEGylated membrane-forming protein, so that when a protein nano-coating layer with a mineralization-regulating function is formed, a large amount of high molecular weight protein aggregates that block dentin pores are not generated, the permeability is better, and the protein nano-coating layer can penetrate deeper into the already exposed dentin pores, reaching a depth of 200-500 μm (the blocking depth of the protein coating layer reacting with TCEP is only about 40 μm), and can reach the recesses of pits and fissures.

A communications cable has coated conductor wires separated by a wire separator with at least one hole in the cross section to form a twisted pair configured to maintain a distance of approximately 0.375 mm between the conductors and a characteristic impedance of approximately 100 ohms. The coating on the conductors may be an enamel or other appropriately thin insulating material.

A method for engraving and texturing an item (1) including a decoration (2) filled at least partially with an enamel (3), the method including a laser ablation step using a femtosecond or picosecond laser on the surface of the enamel (3) and / or within the enamel (3) to produce a structure (7).

Described herein are dental treatment compositions, more particularly, a dental varnish composition useful in effective fluoridation, enhancement of remineralization the tooth enamel, and hypersensitivity through occlusion of dentine tubule. The dental varnish composition includes a hydrogel system and at least one fluoride source, wherein the dental varnish is water soluble. The hydrogel system includes at least one polyphenol having at least one phenol group, at least one polymer, and a metal ion. Described herein are also methods of making dental varnish composition in a single step and one pot synthesis.

To provide a method of forming an enameled coating on a structure made of a metal matrix composite (MMC) material.SOLUTION: In some examples, the method includes providing a structure formed of the MMC material, the MMC material having a given coefficient of thermal expansion (CTE). An enamel mixture is formed to include a glass material and a pigment material, the material selected to yield a mixture with a substantially similar CTE. A surface of the MMC structure is coated with the enamel mixture, the structure then heated in order to melt the enamel mixture. Following the heat treatment, the heated, coated MMC structure is cooled, thereby achieving a glass enameled coating with a color corresponding to the selected pigment.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of toothbrushes, in particular to an electric toothbrush with a magnetic suspension type vibration sweeping structure, which comprises a hollow main machine shell, a bottom cover and a brush head are respectively arranged at two ends of the main machine shell, and a support is arranged in the main machine shell. The bracket is provided with an E-shaped iron core which is formed by punching a plurality of silicon steel sheets into an E shape and stacking the silicon steel sheets, and wire turns are arranged in the E-shaped iron core. Compared with traditional mechanical rotation, rotation of the brush head is smoother, the bipolar strong magnet continuously rotates in a reciprocating mode in a magnetic suspension mode, bristles of the brush head continuously rotate in a reciprocating mode to conduct sweeping vibration, the mode caters to the growth direction of enamel, and therefore friction to teeth is reduced.

The invention discloses a zirconia-based composite material imitating enamel structure and composition, and relates to the technical field of amorphous ceramic nanotube array / organic polymer composites.The preparation method comprises the following steps that 1, ammonium fluoride, glycerol and formamide are sequentially added into deionized water to prepare an electrolyte; (2) a zirconium sheet is soaked in the electrolyte for three-step anodic oxidation, and an amorphous zirconium oxide nanotube array is obtained; and (3) soaking the amorphous zirconia nanotube array in a PMMA (polymethyl methacrylate) solution, drying, dropwise adding the PMMA solution, and performing vacuum drying to obtain the zirconia-based composite material with the enamel-imitating structure and components. The preparation method is convenient to operate, mild in reaction condition, environmentally friendly and suitable for large-scale actual production, the composite material has the excellent performance of high rigidity and high hardness, the microstructure can be precisely regulated and controlled, and an innovative material technical scheme with practicability and reliability is provided for actual engineering application.

A method of producing a dental restoration by jet-printing, including the steps of jet-printing (S101) a dentin core of the dental restoration using a plurality of opaque ceramic slurries having different colors from each other; and jet-printing (S102) the tooth enamel of the dental restoration using a translucent ceramic slurry.

A method for manufacturing an item (1) including a through-decoration (2) filled with an enamel (3) to form a plique-à-jour enamel. The method includes: obtaining a blank (5) defined with an upper face (5a) and a lower face (5b) opposite the upper face (5a); removing part of the blank (5) from the upper face (5a) to produce a decoration (2a) that does not pass through to the lower face (5b) or, alternatively, in the previous step, obtaining said blank (5) directly with the non-through decoration (2a); depositing one or more layers of enamel (3) within the non-through decoration (2a) and firing the enamel (3) after each 10 layer has been deposited; machining, preferably by grinding, the lower face (5b) to reveal the enamel (3) and thus produce the item (1) with the through-decoration (2) filled with enamel (3).

An enamel-like bionic composite material with a hierarchical structure and a preparation method therefor. The method comprises the following steps: assembling nanowires by adopting a wet spinning technique to obtain nanoclusters; dissolving a polymer in water to obtain a clear solution; dispersing the nanoclusters into an organic solution to form a uniform suspension as a slurry; adopting a bidirectional freezing ice-templating technique to assemble the nanoclusters into a macroscale parallel layered arrangement framework; and compacting the framework by means of mechanical compression densification, and acquiring an enamel-like composite material with a hierarchical structure. The enamel-like bionic composite material with the hierarchical structure, prepared by adopting the wet spinning technique to obtain the nanoclusters assembled by one-dimensional nanowires and then by means of the ice-templating technique and the method of mechanical compression densification, exhibits mechanical properties matched with real enamel, thereby meeting the requirements of high strength and high toughness of the composite material in engineering.

By introducing the microfluidic system, adjusting the reaction environment and accurately controlling the synthesis conditions, the limitation of the prior art is successfully broken through. The micro-fluidic system can uniformly distribute the ion solution on the micro-scale, accurately regulate and control the reaction conditions, obviously improve the stability and accuracy of the reaction, and effectively avoid the quality fluctuation of the nanowire caused by the non-uniform reaction conditions in the traditional method. By adjusting variables such as temperature, solution concentration and the like, the structure of the inorganic nanowire can be regulated and controlled on the nanoscale, and then microscopic ordered arrangement of natural enamel is simulated. By introducing a self-assembly technology and a nano template technology, inorganic nanowires can be accurately arranged in space, so that the microstructure of natural enamel can be better copied. Through the combination of the technologies, the structural stability and the mechanical property of the bionic inorganic nanowire are remarkably improved, and a wide prospect is opened up for application of the bionic inorganic nanowire in the fields of dental restoration and other bionic materials.

The present invention relates to a high-strength cold-rolled enamel steel sheet and a method of manufacturing same, the enamel steel sheet comprising, in weight %, C:0.01-0.1%, Mn:0.05-0.4%, Si:0.001-0.03%, Al:0.03-0.12%, P:0.02-0.04%, S:0.001-0.02%, Cu: 0.03-0.08%, Mo:0.13-0.30%, N: 0.004% or less, 0:0.003% or less, and the balance being Fe and inevitable impurities, wherein the high-strength cold-rolled enamel steel sheet has an oxide layer with a thickness of 0.006-0.030 μm formed in an inward direction from the surface thereof and satisfies formulas (1) and (2), and thus has no bubble defects and excellent fish scale resistance and enamel adhesion after enamel treatment.

The present application relates to a kind of light-cured printing biomimetic gradient zirconia ceramic / resin composite material and its preparation method.It is with zirconia ceramic / photoinitiator resin composite slurry as standard, by 3D printing preparation is obtained;Zirconia ceramic / photoinitiator resin composite slurry includes according to weight parts, yttrium stabilized zirconia 45~55 parts, 1,6-hexanediol diacrylate 15~20 parts, pentaerythritol tetraacrylate containing stabilizer MEHQ 5~10 parts, ethanol 3~5 parts, dispersing agent 2~3 parts, initiator 0.1~0.5 parts;Biomimetic crown model is spider web hexagon-squid bone S-shaped composite structure.The present application combines the biomimetic crown model of spider web hexagon-squid bone S-shaped composite structure, zirconia ceramic / photoinitiator resin composite slurry and the product prepared by 3D printing has the composite mechanical properties of dentin / enamel, keeps lower elastic modulus, improves the toughness of light-cured printing biomimetic gradient zirconia ceramic / resin composite material.

The invention discloses a deep learning-based method for analyzing the demineralization thickness of enamel in a fluorescence image, which comprises the following steps: by taking a QLF fluorescence image as an input, establishing calibration of a fluorescence signal and a real thickness in combination with TMR, and deriving a continuous and graded label; on one hand, whether a single image exceeds a 100 [mu] m threshold value or not is judged, on the other hand, non-uniform demineralization is simulated based on 3 * 3 splicing, classification recognition is carried out, and the method outputs a threshold conclusion, interval distribution and equal-structured results. Experiments show that the binary classification accuracy rate is about 96.5%, and the very-class overall accuracy rate is about 97%. The method is suitable for early screening and risk assessment of caries, and has interpretable, integratable and clinical popularization values.

The invention discloses a bionic dental implant crown composite material which is composed of nano-crystalline cellulose fibers and polyacrylic resin, the surface of the bionic dental implant crown composite material is provided with a ceramic coating with the thickness of 0.3-0.5 mm, the mass ratio of the nano-crystalline cellulose fibers to the polyacrylic resin is 1: (4-6), the ceramic coating is composed of micron-sized zirconium oxide particles and nano-sized titanium dioxide particles, and the nano-sized zirconium oxide particles and the nano-sized titanium dioxide particles are uniformly distributed on the surface of the ceramic coating. The mass ratio of titanium dioxide to zirconium oxide is 1: (9-19), the particle size difference of particles can form a micro-nano structure on the coating, and the mechanical property of the material is improved. The nano cellulose fiber and polyacrylic resin composite structure is a dentin-imitated structure, the ceramic coating is a tooth enamel-imitated structure, and the nano cellulose fiber with the length of 0.05-0.2 mm extends to the ceramic coating to form a connection interface, so that the effects of dispersing stress and improving the impact resistance and durability of the material can be achieved, and the implant tooth has excellent comprehensive performance.

The present invention belongs to the field of materials, involving technical fields such as nanoscience, bionics, and mechanics, and particularly relates to a preparation method of a metal matrix composite material with an enamel-like modification layer. This method takes metal as the research object, selects alkali, metal salt, and buffer reagent as raw materials, and in-situ constructs an enamel-like ceramic strengthening layer on the metal substrate surface through hydrothermal treatment, controlled hydrolysis, and calcination processes successively. The specific method is as follows: (1) Prepare a NaOH solution with a target concentration, and place the cut metal foil in the alkali solution for hydrothermal treatment; (2) Prepare a buffer solution with a target pH, then add an appropriate metal salt, and place the sample obtained in (1) in the above solution for low-temperature reaction for a certain period of time; (3) Place the sample obtained in (2) in a muffle furnace for calcination for a certain period of time, and finally obtain a uniform and dense enamel-like modification layer on the metal substrate surface, obtaining a high-stiffness and corrosion-resistant metal matrix composite material, realizing the strengthening and anti-corrosion of the metal.

A method for the three-dimensional decoration of a substrate (11) to produce an external part (10), which method includes the steps of: depositing an enamel base layer (12) on an external surface (110) of a ceramic substrate (11); firing the substrate (11) covered with the base layer (12); etching the base layer (12) in a predefined decorative pattern to generate one or more blind cavities; depositing a decorative layer (13) of ceramic material and / or metallic material on the base layer (12) and the cavities (120) so as to fill said cavities (120) in order to form decorative elements (130); surfacing the decorative layer (13) to remove said layer deposited on the base layer (12); and tribofinishing the substrate (11), the base layer (12) and the decorative layer (13) to remove the base layer (12).

A method to provide for an enameled glazing including, a glass sheet, an enamel coating on at least a part of a first surface of the glass sheet, a multilayer coating on at least a part of a first surface of the glass sheet and at least partially on top of the enamel coating, such that the enamel coating either comprises no Bi4Si3O12, or, if it comprises Bi4Si3O12, the enamel coating exhibits a crystallinity ratio <5, as measured by XRD, where the crystallinity ratio is the ratio of Bi4Si3O12 / Cr2CuO4.

The application provides a hydroxyapatite nanowire coated with a metal ion-rich amorphous layer and a preparation method thereof, and belongs to the technical field of nanometer material preparation, comprising a hydroxyapatite nanowire and a metal ion-rich amorphous layer coated on the surface of the hydroxyapatite nanowire, wherein the length-diameter ratio of the hydroxyapatite nanowire is 500-10000, and the ratio of the diameter of the hydroxyapatite nanowire to the thickness of the metal ion-rich amorphous layer is (5-50):1. The application learns the unique structure of natural tooth enamel, coats a layer of amorphous layer containing iron, aluminum, copper, manganese or zinc metal ions on the outer layer of the hydroxyapatite nanowire, so as to simulate the multi-level structure of the hydroxyapatite nanowire in the natural tooth enamel, and make the hydroxyapatite nanowire have some excellent performances endowed by the metal ions, such as good thermal stability, corrosion resistance and wear resistance.