30 results about "Fluoride release" patented technology

The present invention is directed to magnesium phosphate ceramics and their methods of manufacture. The composition of the invention is produced by combining a mixture of a substantially dry powder component with a liquid component. The substantially dry powder component comprises a sparsely soluble oxide powder, an alkali metal phosphate powder, a sparsely soluble silicate powder, with the balance of the substantially dry powder component comprising at least one powder selected from the group consisting of bioactive powders, biocompatible powders, fluorescent powders, fluoride releasing powders, and radiopaque powders. The liquid component comprises a pH modifying agent, a monovalent alkali metal phosphate in aqueous solution, the balance of the liquid component being water. The use of calcined magnesium oxide as the oxide powder and hydroxylapatite as the bioactive powder produces a self-setting ceramic that is particularly suited for use in dental and orthopedic applications.

The invention relates to a composition comprising an ethylenically unsaturated acidic compound, water, a functionalized silane, an initiator, optionally comprising a sensitising agent, a non-surface treated filler, optionally a solvent, optionally an ethylenically unsaturated compound, optionally additives selected from the group consisting of stabilizer(s), photobleachable colorant(s), fluoride release agent(s), pigments. The invention also relates to a process of producing such a composition by in-situ silanization of the non-surface treated filler.

An MEA for a fuel cell that employs multiple catalyst layers to reduce the hydrogen and / or oxygen partial pressure at the membrane so as to reduce the fluoride release rate from the membrane and reduce membrane degradation. An anode side multi-layer catalyst configuration is positioned at the anode side of the MEA membrane. The anode side multi-layer catalyst configuration includes an anode side under layer positioned against the membrane and including a catalyst, an anode side middle layer positioned against the anode side under layer and not including a catalyst and an anode side catalyst layer positioned against the anode side middle layer and opposite to the anode side under layer and including a catalyst, where the amount of catalyst in the anode side catalyst layer is greater than the amount of catalyst in the anode side under layer.

The present application discloses a fast-setting mineral trioxide aggregate (MTA) with fluoride release for practical treatment of diseases in teeth and bone, e.g. for caries treatment and / or prevention. The cariostatic MTA contain calcia-silica-alumina cement with moderately increased tricalcium aluminate content allowing high calcium hydroxide release. The MTA composition support remineralization and biomineralization, and it is suitable for stimulation of hard tissue regeneration. MTA embodiments contain superplasticizer and nanosilicate for improved mechanical properties. The MTA compositions include optional radiocontrast and nano-enriched leachable fluorine, nitrate, strontium, and phosphate. The fast-setting MTA paste exhibits flow-to-clay-like consistency, which allows new practical applications including cavity lining, temporary restoration, bonding, and cementations in one MTA embodiment. The high calcium hydroxide and high fluoride release are suitable for caries prevention and treatment, and per se inhibition of dental symptoms.

The present disclosure relates to bite plates for use with various orthodontic remodeling devices. A bite plate that releases fluoride during use, thus encouraging remineralization on enamel is described. Additionally, bite plates with a colorant or color-changing matrix that serve as indicators for fluoride concentration are also described.

An MEA for a fuel cell that employs multiple catalyst layers to reduce the hydrogen and / or oxygen partial pressure at the membrane so as to reduce the fluoride release rate from the membrane and reduce membrane degradation. An anode side multi-layer catalyst configuration is positioned at the anode side of the MEA membrane. The anode side multi-layer catalyst configuration includes an anode side under layer positioned against the membrane and including a catalyst, an anode side middle layer positioned against the anode side under layer and not including a catalyst and an anode side catalyst layer positioned against the anode side middle layer and opposite to the anode side under layer and including a catalyst, where the amount of catalyst in the anode side catalyst layer is greater than the amount of catalyst in the anode side under layer.

Dental composition comprising an aqueous mixture containing(i) a polymerizable acidic phosphoric acid ester monomer of the following formula (A):whereina is an integer of from 1 to 10; R1 represents a hydrogen atom or a moiety of the following formula (Y)wherein X independently represent an oxygen atom, a sulfur atom, or a group NR, wherein R may be a hydrogen atom, a C1-6 alkyl group or an acyl group; L represents an (a+b)-valent organic residue containing 1 to 20 carbon atoms and optionally including ether, thioether or amino groups or further acidic groups, whereby the carbon atoms comprise at least a+b carbon atoms selected from primary and secondary aliphatic carbon atoms, secondary alicyclic carbon atoms, and aromatic carbon atoms, each of said a+b carbon atoms linking a phosphate or 2-(oxaallyl) derivative group; b is an integer of from 1 to 10;R2 which may be the same or different, independently may be hydrogen, an allyl group or a moiety R1 wherein b is 1; provided that at least one of R1 and R2 is not hydrogen;(ii) one or more polymerizable N-substituted alkyl acrylic or acrylic acid amide monomers;(iii) an organic water-miscible solvent and / or water;(iv) a polymerization initiator;(v) an inhibitor and / or a stabilizer;(vi) optionally an organic or inorganic acid; and(vii) optionally a filler and / or a fluoride releasing compound.

The present invention relates to a self hardening glass carbomer composition obtainable by treating a fluorosilicate glass powder with: (a) a poly(dialkylsiloxane) having terminal hydroxyl groups, wherein the alkyl groups contain 1 to 4 carbon atoms, (b) an aqueous acid solution, and (c) separating the treated fluorosilicate glass powder from the aqueous acid solution. The glass carbomer compositions according to the invention have for example good toughness and strength and excellent fluoride release, In addition, the glass carbomer compositions according to the invention do not show shrinkage or expansion, an essential property for providing fillings for cavities having high strength and long durability. Moreover, the glass carbomer composition according to the present invention has a lower sensitivity towards abrasion and wear, a greater stiffness, a smoother surface, a better colourfastness, a better adherence to e.g. bone tissue and a lower water sensitivity.

A tooth varnish that is free from pinus extracts, free of substantial undesired coloring agents, with a reduced viscosity, delivered in a user-friendly, flow-through, unit dose applicator and having improved fluoride release, uptake, and remineralization properties.

Dental composition comprising an aqueous mixture containing(i) a polymerizable acidic phosphoric acid ester monomer of the following formula (A):whereina is an integer of from 1 to 10; R1 represents a hydrogen atom or a moiety of the following formula (Y)wherein X independently represent an oxygen atom, a sulfur atom, or a group NR, wherein R may be a hydrogen atom, a C1-6 alkyl group or an acyl group; L represents an (a+b)-valent organic residue containing 1 to 20 carbon atoms and optionally including ether, thioether or amino groups or further acidic groups, whereby the carbon atoms comprise at least a+b carbon atoms selected from primary and secondary aliphatic carbon atoms, secondary alicyclic carbon atoms, and aromatic carbon atoms, each of said a+b carbon atoms linking a phosphate or 2-(oxaallyl) derivative group; b is an integer of from 1 to 10;R2 which may be the same or different, independently may be hydrogen, an allyl group or a moiety R1 wherein b is 1; provided that at least one of R1 and R2 is not hydrogen;(ii) one or more polymerizable N-substituted alkyl acrylic or acrylic acid amide monomers;(iii) an organic water-miscible solvent and / or water;(iv) a polymerization initiator;(v) an inhibitor and / or a stabilizer;(vi) optionally an organic or inorganic acid; and(vii) optionally a filler and / or a fluoride releasing compound.

The nanometer fluorine-containing resin dental material and the preparation method thereof belong to the technical field of photocurable resin dental material and powder dispersion method. The resin dental material is composed of methacrylate monomers, initiators and inorganic fillers. The inorganic fillers contain fluorine-containing glass powder, nano-silica powder, dyes, strontium glass or / and barium glass; nano-YbF3 and Bi2O3 can also be included. The preparation involves silanization treatment of fluorine-containing glass powder and nano-silicon powder, and ultrasonic dispersion technology of nano-silicon powder in an organic medium. The resin dental material of the present invention has biological activity, can resist dental caries, and has relatively ideal effects in properties such as radiation resistance, transparency, tensile strength, wear resistance, density, rheology and the like. In particular, the combination of fluorine-containing glass powder and preferably methacrylate monomers has the best effect on fluorine release and mechanical properties at the same time.

A tooth varnish that is free from pinus extracts, free of substantial undesired coloring agents, with a reduced viscosity, delivered in a user-friendly, flow-through, unit dose applicator and having improved fluoride release, uptake, and remineralization properties.

The invention relates to a preparation method of an anti-secondary caries cavity restoration material, which belongs to the field of medical and dental preparations. The existing fluorine-containing anti-secondary caries composite resin caries filling materials have the problems of too fast release of fluorine, poor interface compatibility and no rigid support for the caries filling body. This case aims to solve the above problems. The steps of the method in this case include using a silane coupling agent to modify the surface of the nano-inorganic powder, and combining the modified nano-inorganic powder with monomers such as bisphenol A glycidyl methacrylate, dimethacrylic acid Materials such as diluents such as triethylene glycol ester, photoinitiators such as camphorquinone, and co-initiators such as dimethylaminoethyl methacrylate are mixed evenly under dark conditions, and are removed under vacuum conditions. Bubbles, the main point of this case is that the nano-inorganic powder contains fluorine-loaded zirconia nanotubes accounting for 10% to 80% of its own weight. The fluorine-loaded zirconia nanotubes have both the functions of slow-release fluorine to prevent secondary caries and structural reinforcement.

The invention relates to the technical field of release force detection, in particular to a fluoride-containing release film detection method which includes the steps: 1 coating detection glue on a release surface of a fluoride-containing release film; 2 drying the fluoride-containing release film coated with the detection glue in the step 1; 3 fitting a PET (polyethylene terephthalate) release film on the glued surface of the dried fluoride-containing release film obtained in the step 2 under 2KG fitting pressure; 4 detecting the release force of a detection tape obtained in the step 3. According to the detection method, based on tests after simulation tests more strict than practical application conditions, the influence of solvents or residual solvents in wet glue on the fluoride-containing release film in the production process can be effectively evaluated, and whether the fluoride-containing release film meets production requirements or not is timely discovered to avoid the problem that the release force of a coated product is increased or the coated product cannot be released.