21 results about "Dental ceramics" patented technology

A dental polishing paste and a method of surface finishing a dental ceramic with the dental polishing paste is described. The dental polishing paste includes 60 to 90 weight percentage (wt. %) glycerin; 7.5 to 17.5 wt. % inorganic nanoparticles such as, diamond or zirconia, having a mean particle size of 5 to 25 nanometer (nm); and 2.5 to 32.5 wt. % additive, each based on a total weight of dental polishing paste.

The invention discloses an ultra-fast degreased and sintered dental restoration based on a photocuring technology and a preparation method thereof, and relates to the technical field of photocuring dental glass ceramic manufacturing. According to the preparation method of the dental restoration based on the ultra-fast degreasing and sintering of the photocuring technology, the photocrosslinking compound and the thermal crosslinking compound are simultaneously introduced into the slurry system, and the low-molecular-weight solvent and the ceramic powder with high solid content are matched, so that a green body structure capable of keeping integrity under the condition of fast heat treatment is effectively constructed. By combining Joule heating ultra-fast high-temperature sintering equipment, the green body can cross a critical temperature interval in which the green body is easy to crack in an extremely short time, meanwhile, structural relaxation and defect accumulation which are possibly generated in a slow heating process are inhibited, and the microstructure uniformity and reliability of the glass ceramic material in a fast densification and crystallization process are ensured. According to the invention, ultra-fast degreasing and sintering of the dental ceramic material are realized.

A coloring method for coloring a dental ceramic (10) comprises a step for bringing a coloring liquid (30) containing at least two types of metal ions having a standard oxidation-reduction potential difference of 0.5-4.0 (inclusive) into contact with the dental ceramic (10).

The invention provides water-based glass ionomer cement and an obtained dental restoration material, and belongs to the technical field of dental materials. The water-based glass ionomer cement consists of powder and liquid, the powder at least consists of 80-99% of fluorine-containing aluminosilicate glass powder in percentage by mass; the liquid agent is at least composed of 20%-60% of water, 20%-60% of polyolefin acid, 0.01%-20% of a polymerizable monomer containing a phosphoric acid group and 0.01%-20% of a polymerizable monomer containing a carboxylic acid group. According to the water-based glass ionomer cement product, the mechanical property and the bonding property of the product are effectively improved, and the bonding requirements of various dental materials such as enamel, dentin, metal, silicate-based ceramics and zirconia ceramics can be met at the same time; the problem that a traditional glass ionomer cement product is low in bonding strength to a zirconium oxide material is effectively solved, clinical selection of dentists can be facilitated, the medical burden of patients is expected to be reduced, and popularization of dental ceramic repair is further promoted.

The invention belongs to the technical field of dental ceramic materials, and particularly relates to DIW 3D printing silicon nitride dental ceramic and a preparation method thereof. The preparation method comprises the following steps: (1) adding a cross-linking agent and a dispersing agent into polysiloxane to obtain a mixed base solution; (2) adding an organic solvent into the mixed base solution, performing ultrasonic dispersion, and then adding silicon nitride ceramic powder to obtain printing slurry; (3) performing 3D printing on the printing slurry by adopting a DIW process to obtain a silicon nitride ceramic green body; and (4) sequentially carrying out thermal curing and thermal cracking treatment on the silicon nitride ceramic green body to prepare the DIW 3D printing silicon nitride dental ceramic. Polysiloxane is selected as a binder and can cooperate with an auxiliary agent and silicon nitride powder to form stable slurry adaptive to a DIW printing process in a normal-temperature environment; the polysiloxane organic phase is gradually converted into the inorganic phase through subsequent thermal curing and thermal cracking treatment, so that the compactness and the mechanical property of the silicon nitride dental ceramic can be effectively improved.

The utility model relates to the field of dental ceramic detection, in particular to a detection clamp and a universal testing machine for dental ceramic performance testing, the universal testing machine comprises the detection clamp, a detection pressure head and a lifting arm, the detection clamp is arranged below the detection pressure head through a base, and the lifting arm is arranged below the detection pressure head. The detection pressure head is arranged at intervals opposite to the applied force of the detection clamp, the detection pressure head can move towards the detection clamp, and the lifting arm is connected with the lifting pressure head and drives the lifting pressure head to move. According to the utility model, the ceramic to be tested is limited through the supporting seat and the clamping groove plate, and the pressure head is matched to detect the hardness, toughness and other properties of the ceramic material, so that comparison is facilitated to obtain the ceramic material with the best quality for dental ceramic performance test.

The present invention provides an oxide ceramic pre-sintered body for dental use and a method of production thereof having excellent machinability with a low probability of chipping while exhibiting high translucency after sintering. The present invention relates to an oxide ceramic pre-sintered body for dental use comprising oxide ceramic particles with an average primary particle diameter of 50 to 300 nm, and pores, and having a D10 of 20 nm or more and a D90 of 90 nm or less in a cumulative distribution of pores within the pre-sintered body. The oxide ceramic pre-sintered body for dental use has a relative density of preferably 43 to 63%. The oxide ceramic pre-sintered body for dental use has a BET specific surface area of preferably 5 to 25 m2 / g as measured in compliance with JIS Z 8830:2013.

A dental ceramic blank comprising at least one organic compound, characterized in that the blank has an open-pore ceramic framework, wherein the open-pore ceramic framework is selected from an open-pore dental ceramic framework comprising zirconia, aluminum oxide, a mixed oxide comprising zirconia, and / or silicon carbide, wherein the open-pore ceramic framework contains 2 to 50 wt.% of at least one organic compound selected from a) comprising at least one polymerizable monomer and / or a mixture of polymerizable monomers, thermal initiators comprising peroxide and / or an azo compound or a redox system comprising a peroxide, and a reducing agent selected from ascorbic acid, an ascorbic acid derivative, barbituric acid or a barbituric acid derivative, sulfinic acid, a sulfinic acid derivative or a redox system (aa) barbituric acid or thiobarbituric acid or a barbituric acid or thiobarbituric acid derivative and (bb) at least one copper salt or copper complex and (cc) at least one compound with an ionic halogen atom, particularly preferably a redox system comprising 1-benzyl-5-phenylbarbituric acid, copper acetylacetonate and benzyldibutylammonium chloride, and / or b) a polymer of the aforementioned monomers polymerized in the blank with respect to the overall composition of the dental ceramic blank.

The invention relates to an enamel bionic dental ceramic repair material for indirect repair as well as a preparation method and application of the enamel bionic dental ceramic repair material, firstly, an ultra-long hydroxyapatite nanowire is synthesized, or the ultra-long hydroxyapatite nanowire is subjected to silicon dioxide or silicon dioxide-zirconium oxide coating modification, and a nano-scale crystal structure form of enamel is simulated; secondly, coupling the nanowires by utilizing amphiphilic molecules gamma-methacryloxy propyl trimethoxy silane or 10-methacryloxy decyl phosphoric acid dihydrogen acid, and inducing the nanowires to be compactly and parallelly arranged, so as to form an enamel-like micron-sized glaze column structure. And then, immersing the nanowire aggregate with the glaze-column-like structure into resin monomer liquid, and realizing ordered and crossed macroscopic arrangement of the glaze-column-like structure under the action of centrifugal strong shearing force. Finally, excessive organic matrixes are removed, the material is compact and solidified under the high-pressure condition of cold sintering, efficient and large-scale enamel-like block construction is achieved, and the material is applied to indirect repair of oral clinical tooth defects.

The invention belongs to the technical field of dental restoration materials, and particularly relates to a simulated dental ceramic restoration based on computer color matching and a preparation method of the simulated dental ceramic restoration. A green body which is matched with an abutment tooth in color and achieves continuous gradual change is prepared by applying a 3D printing technology, preparation of the dental ceramic restoration is achieved through heat treatment, and the obtained dental ceramic restoration can achieve accurate color matching and gradual change effects.

A method for coloring a dental ceramic (10) includes a step of contacting a coloring liquid (30) with the dental ceramic (10). The coloring liquid (30) contains at least two types of metal ions in which a difference between standard oxidation-reduction potentials is 0.5 or more and 4.0 or less.

The invention relates to a dental ceramic based on silicate or zirconium dioxide as a matrix. The dental ceramic is characterized according to the invention by an admixture of a cerium-doped LuAG, cerium-doped YAG and / or a cerium-doped LuYAG garnet, wherein the LuAG garnet assumes the following chemical composition: Lu 3-a Ce a Al 5-b Ga b O 12 , where a takes a value of 0.003 <= a < 0.024 and b a value of 0 to 3, the YAG garnet takes on the following chemical composition: Y 3-a Ce a Al 5-b Ga b O 12 , where a takes a value of 0.003 <= a < 0.024 and b a value of 1 to 3.5, and the LuYAG garnet takes the following chemical composition: Y 3-a-c Lu c Ge a Al 5-b Ga b O 12 , where a takes a value of 0.003 <= a < 0.024, b a value of ⅓(3-ac) to 3.25 and c a value greater than 0.

The present invention provides a dental ceramic coloring liquid with which a decrease in the mechanical strength of a dental ceramic after sintering can be reduced, and that can impart masking properties while having good preservation stability. The present invention relates to a dental ceramic coloring liquid comprising an organosilicon compound. The organosilicon compound is preferably hydrophilic. The organosilicon compound is preferably a silicone compound. The organosilicon compound is preferably an alkylsilane compound.

The present invention provides a dental ceramic coloring liquid that can suppress a decrease in mechanical strength of sintered dental ceramics, exhibits excellent storage stability, and imparts opacifying properties. The present invention relates to a dental ceramic coloring liquid comprising an organosilicon compound. The organosilicon compound is preferably hydrophilic. The organosilicon compound is preferably a silicone compound. The organosilicon compound is preferably an alkylsilane compound.

Infiltrant comprising 90 to 99.9 wt.% of at least one polymerizable monomer, oligomer or prepolymer and 0.05 to 10 wt.% of a polymerization initiator, wherein the infiltrant has a dynamic viscosity of 0.3 to 100 mPa·s (23°C); for use in a method for solidifying a fixed ceramic dental prosthesis in the oral cavity.

The invention relates to a method for producing a dental zirconia article, comprising the following steps: processing a radiation-curable zirconia sol A as a construction material in a laminate manufacturing process comprising a radiation curing step to obtain a zirconia gel article, the zirconia gel article has the shape of a dental article with an outer surface and an inner surface; applying a radiation curable zirconia sol Bx on at least a portion of the outer surface of the zirconia gel article; radiation curing the radiation curable zirconia sol Bx of step (b); converting the zirconia gel article into a zirconia aerogel article, the radiation-curable zirconia sol A being the same as or different from the radiation-curable zirconia sol Bx in terms of chemical composition and / or physical properties. The invention also relates to a dental ceramic zirconia article obtainable by a process according to any of the preceding claims.

A composite, three-dimensionally stable facing material for adding aesthetic features to a ceramic dental prosthetic base. The composite may be a malleable, pasty composite or flat strip of material capable of being molded to surfaces of the ceramic base and retained on the base. The applied material is capable of being trimmed, cured to a hardened state and finally sintered to its final hardness. Red or Violet ceramic fibers and / or other characterization may be added for increasing realism of a ceramic denture gingival surfaces.

The application discloses a kind of dental composite ceramic materials and preparation method, it is related to dental ceramic material technical field, the preparation method includes the following steps: zirconium oxide powder is mixed with ethyl silicate solution, and then is dried and pressed into block and high-temperature sintering, obtain dense zirconium oxide;Lithium-based glass powder is used to high-temperature permeation to the zirconium oxide, and then is carried out two-stage heat treatment, so that the lithium silicate glass that remains in the surface of zirconium oxide and penetrates into surface layer is crystallized to form lithium disilicate crystal, obtain dental composite ceramic material.The dental composite ceramic material of the application has excellent mechanical properties of zirconia ceramic and good optical properties of lithium disilicate glass ceramic simultaneously, compared with the weak binding force at interface of traditional zirconia-ceramic veneer double-layer structure and the low strength of ceramic veneer, the wide range of composite is formed between zirconia and lithium disilicate glass ceramic in this material, there is no interface, and the binding force is higher, it is a new type of dental ceramic material with great application potential.

A composite, three-dimensionally stable facing material (10) for adding aesthetic features to a ceramic dental prosthetic base (20). The composite may be a malleable, pasty composite or flat strip of material capable of being molded to surfaces of the ceramic base (20) and retained on the base (20). The applied material (10) is capable of being trimmed, cured to a hardened state and finally sintered to its final hardness. Red or Violet ceramic fibers (44) and / or other characterization may be added for increasing realism of a ceramic denture gingival surfaces.

The invention relates to a dental ceramic based on silicate or zirconium dioxide as a matrix. The dental ceramic is characterized according to the invention by an admixture of a cerium-doped LuAG, cerium-doped YAG and / or a cerium-doped LuYAG garnet, wherein the LuAG garnet assumes the following chemical composition: Lu 3-a Ce a Al 5-b Ga b O 12 , where a takes on a value from 0.003 to 0.015 and b a value from 0 to 3, the YAG garnet takes on the following chemical composition: Y 3-a Ce a AI 5-b Ga b O 12 , where a takes a value of 0.003 to 0.015 and b a value of 1 to 3.5, and the LuYAG garnet takes the following chemical composition: Y 3-a-c Lu c Ge a Al 5-b Ga b O 12 , where a takes a value from 0.003 to 0.015, b a value from ⅓(3-ac) to 3.25 and c a value greater than 0.

The invention relates to a dental ceramic restoration and a surface modification material thereof, the dental ceramic restoration is coated with the surface modification material to form a coating for size modification, the surface modification material comprises: a polymerizable monomer composition comprising 20-50 parts by weight of a first component and 0.2-5 parts by weight of a second component, the first component is a multi-polymeric-functional-group polymeric monomer containing three or more polymeric functional groups in a molecule, the density of the polymeric functional groups is greater than 8 mmol / ml, and the polymeric functional groups are in a solid state at room temperature or have the viscosity greater than 3000 cps at 25 DEG C; the second component is selected from a polymerizable monomer containing an acidic group or containing an acidic group and containing alkoxy silane; the volatile diluent is an organic solvent or a polymerizable monomer of which the vapor pressure is greater than or equal to 1Kpa and less than 10Kpa at room temperature; and a photopolymerization initiator, wherein the wavelength at the time of photopolymerization is 365 nm to 520 nm.