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40results about How to "Low polymerization shrinkage" patented technology

Dental self-curing resin cement compositions

The present invention refers to dental self-curing resin compositions having enhanced mechanical and physical properties. In particular, the present invention relates to dental self-curing resin compositions consisting of (i) a Paste A composition containing the multifunctional prepolymer mixture of 2,2-bis-[4-(2-hydroxy-3-methacryloxypropoxy)phenyl]propane (“Bis-GMA”) and multifunctional prepolymer formed by substituting hydrogen atoms in hydroxyl group with methacrylate groups in the Bis-GMA molecules, and further containing a diluent, an adhesive monomer, a polymerization initiator, a polymerization inhibitor, a light stabilizer, an antioxidant, an inorganic pigment and an inorganic filler; and ii) a Paste B composition containing the same prepolymer mixture in the Paste A composition, and further containing a diluent, an adhesive monomer, a reductant, a polymerization inhibitor, a light stabilizer, an antioxidant, an inorganic pigment and an inorganic filler. The composition according to the present invention has better physical and mechanical properties than that of conventional compositions and is an ointment-ointment system able to be conveniently used.
Owner:KOREA INST OF SCI & TECH +1

Dental filling composite resin using silicon dioxide nano-fiber as filler and preparation method thereof

The invention discloses a dental filling composite resin using a silicon dioxide nano-fiber as a filler. The resin is prepared from the following raw materials in percentage by mass: 18-22 percent of bisphenol A-glycidyl methacrylate, 4-16 percent of triethylene glycol dimethacrylate, 0.5-1 percent of camphorquinone, 0.5-1 percent of ethyl 4-N,N-dimethylaminobenzoate and 60-75 percent of silicon dioxide nano-fiber. The preparation process is simple and easy to operate, the raw materials are easily available at relatively low price, and the prepared composite resin has excellent physical mechanical performance, good abrasion resistance and long service life, has the characteristics of light color, low polymerization shrinkage and the like, and is expected to be used in clinical application.
Owner:JIANGSU UNIV OF SCI & TECH

Dental materials based on dimer acid derivatives with ring opening polymerizable groups

ActiveUS20120010322A1Reduced polymerization shrinkageLow polymerization shrinkageImpression capsOrganic chemistryAdhesiveEther
The invention relates to a radically polymerizable monomer of formula (I)whereinW1 and W2 in each case independently represent H or X—R—Y—PG, wherein at least one of W1 and W2 represents X—R—Y—PG,X in each case independently is missing or represents an ether, ester, amide, urethane or urea group,Y in each case independently is missing or represents an ether, ester, amide, urethane or urea group,R in each case independently is missing or represents a C1-C16 alkylene radical which can be interrupted by one or more O atoms, wherein R can be missing only if X and / or Y is simultaneously also missing, andPG in each case independently represents a cyclic, ring-opening polymerizable group,a, b, c and d independently of each other can take the values 3 to 10.The invention also relates to polymerizable compositions which comprise the monomers according to the invention, as well as their use as dental materials and for the preparation of dental materials, in particular composites, cements, adhesives or coatings.
Owner:IVOCLAR VIVADENT AG

Dental material, dental material composition, dental restorative material, and cured product

The present invention provides a dental material, a dental material composition and a dental restorative material that exhibit small polymerization shrinkage particularly during curing and are producible at low cost on the industrial scale. The dental material of the present invention includes a specific urethane (meth)acrylic compound represented by Formula (1) described below.
Owner:MITSUI CHEM INC +2

Dental composite resin material with low polymerization shrinkage rate

The invention relates to a dental composite resin material with a low polymerization shrinkage rate, which belongs to the technical field of composite resin materials for repairing or remaking tooth. The dental composite resin material is formed in a mode that a composite resin monomer mixture is mixed with inorganic filler. The composite resin monomer mixture consists of a macro monomer, an acrylate monomer with a vinyl as an end group, an acrylate monomer containing two double bonds and an initiator. The macro monomer is an aromatic polyester low polymer with two or three double bonds. In the invention, the macro monomer is added into the composite resin material; and the macro monomer has the characteristics of low viscosity, high molecular weight and the like, so that the using amount of the inorganic filler can be increased and the polymerization shrinkage rate can be reduced, and thus, the edge micro leakage caused by volume shrinkage in the polymerization process of the materials is reduced and the occurrence probability of secondary caries is reduced.
Owner:吉林省登泰克牙科材料有限公司

Preparation method of dental restoring resin taking silicon dioxide and cluster of silicon dioxide as stuffing

The invention relates to a preparation method of dental restoring resin taking silicon dioxide and cluster of the silicon dioxide as stuffing. The method comprises the following steps: (1) preparing the cluster of the silicon dioxide by using the reaction between bonded groups on the surface of silicon dioxide; (2) adding the silicon dioxide, the cluster of the silicon dioxide, an amine catalyst, and a double-bond-containing silane coupling agent in a cyclohexane solvent, thus obtaining surface-functionalized inorganic general stuffing after reaction; and (3) uniformly mixing the surface-functionalized inorganic general stuffing and an organic resin matrix with a light initiator and finally carrying out photo-curing for 40-120s, thus obtaining the dental restoring resin. The method is simple in preparation technology, easy to operate and suitable to industrial production; the raw materials are cheap in price; and the obtained dental restoring composite resin has a low polymerization-shrinkage ratio and excellent wear-resistant performance and is expected to be used clinically.
Owner:DONGHUA UNIV

Dental material, dental material composition, dental repair material, and cured product

The present invention provides a dental material, a dental material composition and a dental restorative material that exhibit small polymerization shrinkage particularly during curing and are producible at low cost on the industrial scale. The dental material of the present invention includes a specific urethane (meth)acrylic compound represented by Formula (1) described below.
Owner:MITSUI CHEM INC +2

Dental prepolymerized resin filler type composite resin

The invention provides a resin ribbon composite for filling a tooth. The resin ribbon composite for filling the tooth has a low solidified volume shrinkage rate, a high filler filling rate and good polishing performance and high intensity required by bearing filling. Methacrylate resin monomer, structural filler with the average grain diameter varying from 0.04 mu m to 0.4 mu m, and prepolymerized smash filler with the average grain diameter 32 mu m are mixed. In order to improve machining and mechanical property, generally the used prepolymerized filler is grinded to have the average grain diameter which is smaller than 32 mu m. The resin ribbon composite for filling the tooth further has structural filler with the average grain diameter smaller than 0.4 mu m and superfine filler with the average grain diameter smaller than 0.04 mu m.
Owner:ZXTGY BEIJING TECH

Low shrinkage dental composite resin containing organic-inorganic functional monomer and preparation method thereof

The invention discloses a low shrinkage light-cured composite resin for dental restoration and a preparation method thereof. With multifunctional structural advantages, cage-like silsesquioxane can cooperate with an expansion monomer, resin matrix, silanized silica and other components to form a three-dimensional network structure during polymerization so as to reach the purposes of lowering polymerization shrinkage of the material and improving mechanical properties, etc. The preparation method consists of: stirring the components evenly to obtain uncured composite resin, then conducting ultrasonic dispersion, vacuum debubbling, pouring into a mold, visible light curing and other steps, thus obtaining the low shrinkage dental composite resin. The used cage-like silsesquioxane and spiro ortho expansion monomer are both liquid, and have good compatibility with composite resin, and a good dispersion effect can be achieved without introducing a solvent, the added cage-like silsesquioxane provides a network crosslinking point for the system, while the polymerization shrinkage of the composite resin is reduced, the mechanical properties of the material are improved, and the water absorption and solubility are reduced.
Owner:BEIJING UNIV OF CHEM TECH

Dental material, dental material composition, dental restorative material, and cured product

The present invention provides a dental material, a dental material composition and a dental restorative material that exhibit small polymerization shrinkage particularly during curing and are producible at low cost on the industrial scale. The dental material of the present invention includes a specific urethane (meth)acrylic compound represented by Formula (1) described below.
Owner:MITSUI CHEM INC +2

Methacrylate macromonomer containing fluorine structure but not containing bisphenol A structure, preparation method therefor and application thereof

The present invention discloses a methacrylate macromonomer containing a fluorine structure but not containing a bisphenol A structure, preparation method therefor and application thereof. The prepared methacrylate macromonomer containing fluorine structure not containing bisphenol A structure can be used as an organic monomer component of a dental restorative material. The macromonomer has the advantages of large molecular weight, large molecular volume, not containing a bisphenol A structure and containing a fluorine structure. Therefore, when the macromonomer is polymerized, the polymerization volume shrinkage is small and a polymerization product has a good mechanical property.
Owner:上海质数科技有限公司

Organic-inorganic composite filler having many reaction groups on surface and dental curable composition compounded therewith

To provide an organic-inorganic composite filler containing; a polymerizable monomer (a) having at least one functional group selected from the group consisting of —OH group, —NH— group, and —NH2 group, a polymerizable monomer (b) having no functional group selected from the group consisting of —OH group, —NH— group, and —NH2 group, a polymerization initiator (c), an inorganic filler (d), and a silane compound (e) which generates —OH group by hydrolysis.
Owner:SHOFU INC

Dental combination capable of fully or partly replacing natural tooth

The invention discloses a dental material combination. The dental material combination is characterized by comprising a carbamate (methyl) acrylate compound (A), a photopolymerization initiator (B) and a filler (C). The dental material combination is small in polymerization shrinkage during solidification, transparency of a solidified object formed by solidifying the dental material combination can be ensured, and the dental material combination is excellent in attractiveness and can be used for fully or partly replacing the natural tooth.
Owner:WUXI CHENGBO SCI & TECH DEV

Hardenable multi-part acrylic composition

ActiveUS10149919B2Long storage stabilityShortened dough timeImpression capsSurgical adhesivesEmulsionEmulsion polymerization
The invention relates to a hardenable multi-part liquid acrylic composition. The composition comprises a storage stable liquid first part, a storage stable liquid second part and optionally, a third or further liquid parts. The parts are operable to form a cement which hardens to a solid upon mixing of the parts together. The composition comprises an acrylic monomer component, an initiator component, acrylic polymer particles and a radiopacifying filler. The initiator component is present in an amount of effective to polymerize the acrylic monomer component upon being mixed and / or activated therewith. At least some of the radiopacifying filler is encapsulated within and / or adsorbed on the acrylic polymer particles in a liquid part. The invention extends to an at least twin barreled syringe or caulking gun accommodating the multi-part composition, a method of producing the multi-part composition, a composition for use as bone cement composition or in dental repairs, a liquid composition comprising a first sub-population of emulsion or non-emulsion polymerized acrylic polymer particles and radiopacifying filler encapsulated and / or adsorbed in the first sub-population of acrylic polymer particles and bone cement compositions or dental compositions.
Owner:MITSUBISHI CHEM UK LTD

A kind of low-shrinkage nano-composite resin for dental restoration and preparation method thereof

The invention discloses a nano-composite resin with low shrinking percentage for dental repair and a preparation method thereof. The composite resin comprises an organic matrix, an initiator system and inorganic filler. The composition resin is characterized by further comprising oligomeric polysilsesquioxane nano particles. The composition comprises the components in percentage by weight as follows: 18-29% of organic matrix, 1-2% of initiator system, 59-78% of inorganic filler and 2-20% of oligomeric polysilsesquioxane nano particles. The preparation method comprises the following steps of: uniformly mixing all the components to obtain un-cured nano composite resin paste; then, vacuumizing to remove bubbles out of the composite resin paste material; and finally, placing into a mould and curing by visible lights to obtain the nano-composite resin with low shrinking percentage for dental repair. Due to addition of POSS (Polysilsesquioxane), the polymerization shrinking percentage of the composite resin is remarkably reduced and the polishing retentivity and the wear-resisting durability of the material are further improved. The composite resin provided by the invention has the advantages that raw materials are low in price, equipment requirement is low, and the preparation process is simple, easy to operate and suitable for industrialized production.
Owner:DONGHUA UNIV

Dental CAD/CAM removable denture layered machinable resin block and preparation method thereof

The invention discloses a dental CAD / CAM removable denture layered machinable resin block, which is characterized in that the dental CAD / CAM removable denture layered machinable resin block comprises an upper layer block and a lower layer block, the upper layer block is used for engraving teeth, the lower layer block is used for engraving gingiva, the upper layer block is made of dental cutting resin, and the lower layer block is made of base plate PMMA resin. The dental cutting resin comprises bisphenol a dimethacrylate, UDMA, PMMA, a solvent, a curing agent, a coupling agent and a filler, through the arrangement, PMMA can be partially dissolved in a Bis-GMA resin matrix, the compatibility with the resin matrix is good, a three-dimensional network structure is formed after photopolymerization, the structural strength is improved, and the performance of a tooth part meets the physical and chemical performance requirements required by false teeth. The invention further discloses a preparation method of the layered machinable resin block for the dental CAD / CAM removable denture.
Owner:上海沪亮生物医药科技有限公司

Preparation of low-shrinkage Bis-GMA-base-free hyperbranched polyamine-ester flowing resin for dental restoration

The invention relates to a preparation method of low-shrinkage Bis-GMA-base-free hyperbranched polyamine-ester flowing resin for dental restoration, which comprises the steps of mixing polyhydric alcohol, an AB2 type branched monomer and a catalyst, and preparing polyhydroxy hyperbranched polyamine-ester (HPAE) by taking the polyhydric alcohol as a core and adopting a quasi-one-step polycondensation method; preparing modified hyperbranched polyamine-ester molecules containing double bonds and polyurethane groups through polyurethane chemistry, and uniformly mixing the modified hyperbranched polyamine-ester molecules with a diluent, a silanized inorganic filler and a photoinitiator through a three-roller grinder to obtain the uncured flowable flowing resin for dental restoration, wherein the flowing resin has the characteristic of low polymerization shrinkage rate and does not contain Bis-GMA organic components. The prepared flowing resin has low viscosity and good fluidity before photocuring, the polymerization shrinkage rate of a composite resin material can be greatly reduced after photocuring, the problem of potential toxicity caused by release of bisphenol A does not exist, and the requirements of repairing and treating small defects which are difficult to fill, small-area dental caries on the maxillofacial surface in preventive repairing and dental caries in a narrower area can be effectively met.
Owner:DONGHUA UNIV +1

Preparation of high-performance low-shrinkage hyperbranched polyamine-ester composite resin for dental restoration

The invention relates to preparation of a high-performance low-shrinkage hyperbranched polyamine-ester composite resin for dental repair. The high-performance low-shrinkage hyperbranched polyamine-ester composite resin for dental repair is prepared by mixing modified hyperbranched polyamine-ester with a general-purpose resin monomer, a photoinitiator and a silanized inorganic filler, wherein the modified hyperbranched polyamine-ester is obtained by reacting hyperbranched polyamine-ester with a modifier, the modifier is hydroxyethyl methylacrylate and 2, 4-toluene diisocyanate, and the general-purpose resin is bisphenol A-glycidyl dimethacrylate, carbamate dimethacrylate and triethylene glycol dimethacrylate. According to the invention, the prepared composite resin has excellent mechanical strength, bending strength, bending modulus and compression strength which are respectively 108.52 to 124.20 MPa, 8.6 to 9.37 GPa and 301.5 to 373.34 MPa; and the hyperbranched monomer containing double bonds and benzene rings and low in viscosity is prepared and added into a traditional organic matrix, so that the polymerization shrinkage rate of the composite resin material during curing is effectively reduced, and the polymerization shrinkage rate is 1.9-2.84%.
Owner:DONGHUA UNIV +1

Preparation of Hyperbranched Polyamine-Ester Flow Resin for Low-shrinkage Non-bis-gma-based Dental Restoration

The invention relates to the preparation of a low-shrinkage non-Bis-GMA-based dental repair hyperbranched polyurethane-ester flow resin. 2 Type branched monomers and catalysts are mixed, polyol is used as the core, and a quasi-one-step polycondensation method is used to prepare polyhydroxy hyperbranched polyamine-ester (HPAE); Modified hyperbranched polyamine-ester molecule, mixed with diluent, silanized inorganic filler and photoinitiator uniformly by three-roll mill to obtain uncured, flowable, low polymerization shrinkage and no Bis-GMA Flow resin for dental restorations with organic components. The flowable resin prepared by the present invention has low viscosity and good fluidity before photocuring, can greatly reduce the polymerization shrinkage rate of the composite resin material after photocuring, and does not have the potential toxicity problem caused by the release of bisphenol A, and is expected to It can effectively meet the needs of some small defects that are difficult to fill, the restoration and treatment of small caries in the maxillofacial area and narrower areas in preventive restoration.
Owner:DONGHUA UNIV +1

Low shrinkage dental material and method

The invention provides a low polymerization shrinkage dental composition and a polymerizable dental material selected from the group consisting of wax-like dental material that undergoes ring open polymerization. The dental composition is useful as restorative material and for making artificial teeth, dentures, restoratives, crowns and bridges of high strength dental polymeric material.
Owner:SUN BENJAMIN JIEMIN +1
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