Abstract: Dental articles are produced using relatively low sintering temperatures to achieve high density dental articles exhibiting strengths equal to and greater than about 700 MPa. Ceramic powders comprised of nanoparticulate crystallites are used to manufacture dental articles. The ceramic powders may include sintering agents, binders and other similar additives to aid in the processing of the ceramic powder into a dental article. The ceramic powders may be processed into dental articles using various methods including, but not limited to, injection molding, gel-casting, slip casting, or electroforming, hand, cad/camming and other various rapid prototyping methods. The ceramic powder may be formed into a suspension, pellet, feedstock material or a pre-sintered blank prior to forming into the dental article.

Abstract: The invention relates to a dental composition comprising a) carbosilane containing component (A) comprising at least 1 Si-Aryl bond, at least 1 silicon atom, at least 2 unsaturated moiety, no Si—Oxygen bond, b) Si—H functional component (B), c) initiator (C), d) optionally filler (D), and e) optionally component (E) selected from modifiers, dyes, pigments, thixotropic agents, flow improvers, polymeric thickeners, surfactants, odorous substances, diluting agent(s) and flavorings.

Abstract: A porcelain blank comprising a porcelain composition for dental restorations comprising a leucite crystallite phase and a glass matrix phase, wherein the leucite crystallites possess diameters not exceeding about 10 micron. Preferably, the porcelain composition has a maturing temperature from about 750° C. to about 1050° C. and a coefficient of thermal expansion from about 9×10?6/° C. to about 17.5×10?6/° C., and comprises: SiO2 57-67? Al2O3 7-15 K2O 7-15 Na2O 6-15 Li2O 0.5-3.

Abstract: The invention relates to a temporary dental formulation useful as a durable, temporary restorative. The formulation changes color during mixing to assist the operator in ensuring adequacy of mixing and enhancing visualization during placement.

Abstract: A system for providing a dental crown of substantially pure zirconia. The zirconia crown may be formed by one of several manufacturing process. The formed crown exterior is polished and fine polished to produce an aesthetic outer surface mimicking a natural tooth.

Abstract: A hardenable dental composition that includes a polymerizable component and an organogelator.

Abstract: Advanced material is preferably used for the manufacturing of dental crowns which may be used to restore decayed or to protect other compromised tooth structure. The dental crowns are preferably preformed or prefabricated with a strengthener by way of either (1) a metal crown base (for example, a stainless steel crown base) having an advanced material (which may include fillers) applied coating or layer; or (2) an advanced material with a strengthener in the form of a strip and/or fillers. In either of the foregoing, or independently, the advanced material may be formed or applied by flame spray, liquid dispersion, powder coating, compression molding, vacuum forming, injection molding, pressure forming, or thermoforming.

Abstract: A method for making artificial tooth bridges including a ceramic densely sintered high strength individual core veneered with porcelain using powder metallurgical methods. The individual densely sintered bridge parts are joined together to a bridge core by a particle reinforced glass. Since only the glass material wets the surface of the densely sintered parts, the glass is the binding material that holds the core together and the particles function to only increase the strength of the bulk glass material.

Abstract: A coping material for a prosthetic crown is provided. The coping material according to current application is comprised of two portions which are mechanically bonded each other. The first portion is the main coping portion that is located beneath of the enamel layer of a crown. The first portion is made from, including but not limited to, common metal and/or portion fused gold (PFG). The second is the portion which makes contact with gum tissue. That portion surrounds the brim of the bottom of the coping for 360 degrees. The gum contacting portion is comprised of bio-gold that is mechanically bonded to the main coping portion. Centrifuging of molten bio-gold technology is applied for mechanical bonding of the two portions. Electronic forming technology is also applied for mechanical bonding.

Abstract: The invention provides a method of forming dental restorations, particularly dental crowns. The method involves applying a flexible cement composition to a prepared tooth surface. The composition is polymerized so that it substantially hardens. A composite crown-forming material is dispensed into a substantially transparent plastic matrix. The matrix is placed in the mouth of the patient so that the composite material is molded over the tooth surface. Then, the material is irradiated with curing light, through the matrix, so that it hardens to form a dental crown. The crown has good mechanical strength and is resistant to fracturing and breaking.

Abstract: This is a system of prefabricated components of various materials that are physically, chemically and structurally compatible with one another and with various esthetic veneering materials used in the fabrication of fixed dental restorative and prosthetic devices. Due to the considerable expense and time generated by using external laboratories, there exists a need to provide a system for the production of non-metallic crown and bridge understructures utilizing, to the greatest extent possible, pre-fabricated components from on-site inventory.

Abstract: Prefabricated non-custom dental appliances, kits, and methods that allow a practitioner to select one or more prefabricated non-custom appliances having desired color shading characteristics from a kit and bond the selected appliances to a person's teeth. Each appliance includes a form layer including a surface contoured so as to approximate a tooth surface (e.g., the labial surface shape of a selected tooth). The appliance includes a plurality of at least partially uncured composite layers or regions. At least one of the composite layers or regions is disposed adjacent to the form layer, and each region is prearranged relative to one another so as to provide a predetermined overall color shade configuration. At least one of the composite layers or regions differs in color from at least one other composite region so as to provide a desired shade and intensity to the dental appliance.

Abstract: The invention relates to a dental composition comprising a) carbosilane containing component (A) comprising at least 1 Si-Aryl bond, at least 1 silicon atom, at least 2 unsaturated moiety, no Si—Oxygen bond, b) Si-II functional component (B), c) initiator (C), d) optionally filler (D), and e) optionally component (E) selected from modifiers, dyes, pigments, thixotropic agents, flow improvers, polymeric thickeners, surfactants, odorous substances, diluting agent(s) and flavourings.

Abstract: An alloy s provided for dental prostheses including porcelain fused to metal (PFM) restorations. The alloy is grey in color with an oxide coating for bonding porcelain to the oxidized cast alloy substrate. The alloy has suitable mechanical properties for cast prostheses and for the support of the porcelain and is readily polished to a bright sheen. The alloy is based on a palladium-cobalt binary system, has a coefficient of thermal expansion (CTE) in the range of about 14.0 to 15.3 and may include one or more of the following additive metals: aluminum, boron, chromium, gallium, lithium, rhenium, ruthenium, silicon, tantalum, titanium, and tungsten.

Abstract: The present invention relates to dental composites comprising at least one nanoparticulate mixed oxide (a) of SiO2 with X-ray-opaque metal oxides of one or more elements selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu which has been prepared by flame spraying.

Abstract: Lithium silicate materials are described which can be easily processed by machining to dental products without undue wear of the tools and which subsequently can be converted into lithium silicate products showing high strength.

Abstract: A dental composition can include at least one polymerizable resin and at least one anti-stokes up converter. Alternatively, a two-part composition can include at least one dental composition configured for placement onto a person's tooth, and at least one anti-stokes up converter to be combined with the at least one dental composition. The dental composition can be formulated to blend with a person's tooth, and also be capable of changing color to be distinguishable from the tooth when exposed to long wavelength light. The dental composition can be used in a method for performing a dental procedure by applying the dental composition to a tooth, and exposing the dental composition to long wavelength light. Accordingly, the dental composition can aid a dental professional in distinguishing between the location of the dental composition and the tooth.

Abstract: A pressable dental ceramic comprising a mixture of glass and glass-ceramic frits. A refractory filler is also combined with the frits. The dental ceramic contains an amount of leucite less than about 35 percent by weight. Other additives may be included such as pigments, opacifying agents and fluorescing agents. The dental ceramic comprises a cellular-like microstructure comprised of glassy regions surrounded by clusters of leucite crystals distributed around those glassy regions forming a cellular three-dimensional network.

Abstract: The invention concerns dental prostheses. It concerns a method for making a dental prosthesis of composite material by forming an adhesive interface between a metallic support and a cured ceramic material less than 3 mm thick, forming an intermediate interface by treating the surface of a ceramic material with an organic silane, and forming an adhesive interface of the reconstructing mass by treating the silane with an adhesive material compatible with the composite material. The intermediate interface is prepared by an etching operation in conditions liable to form cracks or embrittle the ceramics. The invention is applicable to dental prostheses made of composite material.

Abstract: A dental molding, in particular an artificial tooth, having an outer incisal layer and a dentin layer beneath that, characterized in that a layer of fluorescent material is provided between the dentin layer and the incisal layer. A method of producing the dental molding, and a method of using the dental molding to provide a patient with a more aesthetic appearance are also disclosed.

Abstract: Particulate composite material with an average particle size of 20 to 50 ?m and a maximum content of particles with a size of <10 ?m of 10 wt.-% and its use for the preparation of dental materials.

Abstract: A dental crown that includes a stainless steel shell sized to cover a tooth portion of a patient and a polymeric coating including a polyester/epoxy hybrid composition.

Abstract: The invention relates to uses of glasses and glass-ceramics in dental and orthodontic applications.

Abstract: A visible light photopolymerizable composition comprising a) an aryliodonium salt and b) a titanocene derivate. These compositions can be used together with an epoxide resin as a dental composition.

Abstract: A method of making a dental restoration comprising forming a ceramic core or an alloy framework; pressing a porcelain onto the core or framework, wherein the porcelain comprises an amorphous glass phase with a maturing temperature less than about 850° C., wherein the amorphous glass phase, in one embodiment, comprises: 1 Component Amount (wt. %) SiO2 55-75 B2O3 2.6-6   Al2O3   3-4.9 ZnO 0-3 CaO 0-3 MgO 0.5-3   ZrO2 0-3 BaO 0-2 Li2O 0.8-2   K2O   0-6.

Abstract: A crown prosthesis having a wear resistance and an aesthetic property that are equivalent to those of the conventional hard resin, and being able to be fixed inside the oral cavity in a short time to form a dental prosthesis, without necessity of careful formation of an abutment tooth under consideration of the shape and the structure of the dental prosthesis to be produced later. It also offers no necessity of indirect production of the dental prosthesis outside the oral cavity, the crown prosthesis comprising a polymer of a mixture of a polymerizable compound having an unsaturated double bond, a filler and a polymerization initiator, and having an outer shape resembling a tooth and a space to be filled with a dental composite resin between an inner surface thereof and an abutment tooth, preferably having a thickness of 0.1 to 2 mm, and having, in its inside space, a protrusion having a slot or a hole, for engaging or inserting a post implanted on a tooth root of a remaining tooth.

Abstract: The invention relates to uses of glasses and glass-ceramics in dental and orthodontic applications.

Abstract: Novel unsaturated esters for use in dentistry as bonding agents are produced by a stepwise reaction of a cyclic dianhydride with a) unsaturated alcohols, b) unsaturated glycidyl ethers, and c) unsaturated isocyanates. The products used as bonding agents have the formula: wherein R2 is H or CH3.

Abstract: Dental restorations are fabricated using metal powder. Preferably, the metal powder is a high fusing metal and preferably, the metal powder comprises a non-oxidizing metal. The metal powder is applied to a die and is covered with a covering material such as a refractory die material preferably in the form of a flowable paste. A second covering material may be sprinkled or dusted onto the paste. The model is then dried prior to firing. After drying, the model is sintered to provide a high strength metal restoration. After sintering, the outer shell can be broken off easily with one's hand to expose the sintered coping.

Abstract: A porcelain composition for dental restorations comprising a leucite crystallite phase and a glass matrix phase, wherein the leucite crystallites possess diameters not exceeding about 10 micron. Preferably, the porcelain composition has a maturing temperature from about 750° to about 1050° C. and a coefficient of thermal expansion from about 12×10−6/° C. to about 17.5×10−6/° C., and comprises: Component Amount (wt. %) SiO2 57-66 Al2O3  7-15 K2O  7-15 Na2O  7-12 Li2O 0.5-3.

Abstract: Dental materials containing monomers and/or prepolymers can be subjected to a polymer-forming reaction. The dental materials comprise at least one initiating system and optionally comprise fillers, colorants, flow modifiers, stabilizers, ion-releasing substances as well as compounds which increase X-ray capacity or other modifiers. The dental materials are characterized in that the initiating system is proportioned such that the dental materials are sufficiently capable of flowing for at least 10 seconds after exposure to oxygen, whereupon they subsequently harden into a solid material.

Abstract: Dental material containing a polymerizable component and a component applied superficially to the polymerizable component, which can be removed after the curing of the polymerizable material with accompanying formation of a rough surface.

Abstract: The invention relates to dental materials which contain filler and a polymerizable matrix and are characterized in that they additionally have a component which contracts during thermal treatment.

Abstract: A dental crown that includes a stainless steel shell sized to cover a tooth portion of a patient and a polymeric coating including a polyester/epoxy hybrid composition.

Abstract: The invention relates to two-component preparations comprising components (I) and (II), wherein at least one component comprises epoxy compounds and the preparations cure by cationic polymerization, initiated by Lewis and/or Brönsted acids, after mixing of the two components, the preparations comprising the Lewis and/or Brönsted acids in the form of precursor compounds which are suitable for the formation of Lewis and/or Brönsted acids.

Abstract: A dental porcelain composition comprises an amorphous glass phase with a maturing temperature less than about 850° C., wherein the amorphous glass phase, in one embodiment, comprises: Component Amount (wt. %) SiO2 55-75 B2O3 2.6-6   Al2O3   3-4.9 ZnO 0-3 CaO 0-3 MgO 0.5-3   ZrO2 0-3 BaO 0-2 Li2O 0.8-2   K2O   0-6.

Abstract: The present invention is directed to enhancing the accuracy with which tooth restorations are machined, using a device which can accurately copy mill a dental prosthetic blank from a previously formed dental prosthetic model, and which can closely replicate the feel of a dental tool to which dentists are accustomed. The device uses a tool supported on a linear rotary axis to mill the dental prosthetic blank. In addition, exemplary embodiments are directed to the preparation of a hybrid dental prosthetic blank which can be easily machined.

Abstract: The invention relates to urethane prepolymers, obtainable by reaction of:

Abstract: The invention relates to a method and silicone product for shaping a fiber product used in dentistry to reinforce a prosthetic appliance or a similar structure under construction to conform to the final location. The fiber product containing fibers and curable material is pressed by means of silicone material against the final location or a model thereof followed by curing the curable material present in the fiber product. The invention is characterized in that the silicone material is a polymerised, elastic and soft silicone material that has been shaped to a piece (10,11) corresponding to the size and shape of the fiber product to be shaped, and that when pressed, the silicone material adopts the shape of the final location or the model thereof.

Abstract: High strength ceramic components for use in dental applications are provided with a bonding layer disposed thereon to increase the bonding properties of the ceramic component in order that the ceramic component may better bond to a resin material, ceramic material or composite material. Moreover, the bonding layer provides strength to the ceramic component by forming a compressive layer thereon. The ceramic component may be partially or fully embedded in composite material. The ceramic component is bonded to the composite material either by mechanical means, chemical means or both. The material may be placed directly on the ceramic component. Alternatively, the structural component is coated with a bonding layer to provide adhesion between the composite or like material and the structural component.

Abstract: A filler material comprising a fibrous material and one or more forms of surface-modifying particles for use in dental composites and dental restorations. The surface-modifying particles are bonded to the fibrous material to increase the surface area of the fibrous material and improve the bonding properties of the fibrous material to enable it to better bond to a resin matrix material in a dental composite. In accordance with the present invention, the fibrous material possesses a lower melting temperature than the surface-modifying particles. The surface-modifying particles and the fibrous material are heated to a temperature below the softening temperature of the fibrous material but at a temperature and time sufficient to soften the surface of the fibrous material in order to bond the surface-modifying particles thereto.

Abstract: The present invention provides non-metallic compositions that are useful to repair, restore, adhere to, or protect, the surface of a tooth and that harden in the mouth to form substantially permanent features therein or to adhere fixtures to the surface of a tooth in a substantially permanent manner. The compositions comprise an amount of an essential oil effective to alter the sensory properties, i.e. the taste, a smell, of the composition and that desirably imparts a pleasant taste and/or order. The essential oil further advantageously provides the composition, once hardened in the mouth, with a surface more hydrophobic than a corresponding conventional composition, thereby inhibiting the deposition or formation of bacterial plaque. Also provided are a method of using the compositions to repair or seal hard dental tissue, as well as a method to adhere one or more dental or orthodontic fixtures to hard dental tissue.

Abstract: The invention relates to a membrane system for controlled tissue regeneration of the periodontium, comprising a resorbable polymer membrane and anti-adhesion molecules.

Abstract: Single-solution adhesive resin formulations are made of predominantly dimethacrylates or diacrylates containing (predominantly) two carboxyl groups and a functionalized methacrylate or acrylate diluent monomer. A novel light-activated initiator can be used for photopolymerization of such adhesives.

Abstract: A method for whitening teeth with a neat finishing, and a considerable durability can be provided at a low cost. Further, a method for easily making up nails can be provided. An apparatus of the present invention comprises a lower mold base for placing a male mold of a tooth form or a nail form to be attached with the seal, a sheet base for positioning a high polymer material sheet above the lower base, a holder portion for holding a female mold corresponding to the male mold, and a press mechanism for compressing the male mold, the high polymer material sheet placed on the sheet base, and the female mold with each other.