Abstract: A dental cement hardened by a cement reaction involving the specific polymerizable polyacidic polymer and optionally additional crosslinkable groups, has reduced shrinkage and improved mechanical properties, in particular with regard to flexural strength and fracture toughness. Moreover, the specific polymerizable polyacidic polymer of the present invention contains a high number of acidic groups which is not reduced by the presence of polymerizable moieties, whereby water solubility of the uncured polymer is not impaired by the presence of the polymerizable moieties.

Abstract: An aqueous dental glass ionomer composition comprising (a) a reactive particulate glass, and (b) a linear or branched polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction, whereby the linear or branched polymer comprising acidic groups has a polymer backbone and optionally pendant side chains, (c) optionally dispersed nanoparticles, and (d) optionally a low molecular compound, characterized in that the glass ionomer composition comprises—S.sub.xH groups, wherein x is an integer of from 1 to 6, which crosslink the particulate glass and/or the linear polycarboxylic acid and/or the optional dispersed nanoparticles and/or the optional low molecular compound.

Abstract: Dental obturator point having an obturation body containing a composite material comprising (a) a polymer and b) a particulate filler, whereby the obturation body has a radio opacity of at least 3 mm/mm Al, characterized in that the composite material has (i) a tensile strength of from 5 to 70 MPA1 (ii) a flexural strength of from 5 to 90 MPA, (iii) a flexural module of from 0.1 to 2.5 GPa, and which has (iv) a 300 rpm drilling coefficient at 37° C. in the range of from ?1 to 7.00.

Abstract: A process for the preparation of composite filler particles, comprising: (a) coating a particulate filler having a median particle size (D50) of from 1 to 1200 nm; (b) agglomerating the coated particulate filler, for providing a granulation of the coated particulate filler wherein the granulation contains the coated particulate filler particles whereby the at least one coating layer may be crosslinked by crosslinking groups obtained by reacting the reactive groups and optionally a further crosslinking agent.

Abstract: A one-part self-etching, self-priming dental adhesive having a pH of at most 2, which comprises an aqueous mixture containing (i) one or more polymerizable monomers optionally containing an acidic group, (ii) optionally one or more organic or inorganic acids, (iii) a polymerization initiator, and (iv) a thermal polymerisation inhibitor of the following formula (I): wherein R?1 represents a hydrogen atom, or a saturated hydrocarbon group having 1 to 18 carbon atoms. R?2, which may be the same or different if more than one R?2 is present, independently represent a saturated hydrocarbon group having 1 to 18 carbon atoms, and c represents an integer of from 1 to 4.

Abstract: A process for the preparation of composite filler particles, comprising: (a) coating a particulate filler having a median particle size (D50) of from 1 to 1200 nm; (b) agglomerating the coated particulate filler, for providing a granulation of the coated particulate filler wherein the granulation contains the coated particulate filler particles whereby the at least one coating layer may be crosslinked by crosslinking groups obtained by reacting the reactive groups and optionally a further crosslinking agent.

Abstract: An aqueous dental glass ionomer composition comprising (a) a reactive particulate glass, and (b) a linear or branched polymer comprising acidic groups, which is reactive with the particulate glass in a cement reaction, whereby the linear or branched polymer comprising acidic groups has a polymer backbone and optionally pendant side chains, (c) optionally dispersed nanoparticles, and (d) optionally a low molecular compound, characterized in that the glass ionomer composition comprises—S.sub.xH groups, wherein x is an integer of from 1 to 6, which crosslink the particulate glass and/or the linear polycarboxylic acid and/or the optional dispersed nanoparticles and/or the optional low molecular compound.

Abstract: A dental cement hardened by a cement reaction involving the specific polymerizable polyacidic polymer and optionally additional crosslinkable groups, has reduced shrinkage and improved mechanical properties, in particular with regard to flexural strength and fracture toughness. Moreover, the specific polymerizable polyacidic polymer of the present invention contains a high number of acidic groups which is not reduced by the presence of polymerizable moieties, whereby water solubility of the uncured polymer is not impaired by the presence of the polymerizable moieties.

Abstract: Dental composition comprising (i) a particulate filler; (ii) a polymerizable hydrolysis-stable compound of the following formula (1) AXn wherein A is a linker group containing at least n nitrogen atoms and optionally one or more acidic groups, X are moieties containing a polymerizable double bond and forming an amide bond with a nitrogen atom of A, which X may be the same or different and are represented by the following formula (2) wherein R1 and R2 are independent from each other and represent a hydrogen atom, a C1-6 alkyl group or a group —(CH2)m—Z, wherein Z is COOM, OPO3M2, PO3M2, SO3M, and M is independently a hydrogen atom or a metal atom, and m is an integer of from 0 to 6, L is a bond, a C1-6 alkylene group; and n is an integer of at least 1; provided that at least one X cannot be a (meth)acryl group; and (iii) an initiator system.

Abstract: The invention concerns a dental composition comprising bisacrylamides that are polymerizable by free-radical polymerization and by Michael-addition polymerization with amities. The application of polymerization and addition polymerization with amines opens the possibility to completely reacted materials that have no oxygen inhibited layers. The claimed bisacrylamides have an improved hydrolytic stability.

Abstract: A dental composite composition is disclosed that includes a polymerizable resin, filler particles, and at least one polymerizable stable radical. A variety of polymerizable stable radicals may be employed, including those that have a 2,2,6,6-tetramethylpiperidinyl-1-oxyl moiety. Compositions as described herein exhibit excellent mechanical strength, hardness, and flexural modulus, while also significantly decreasing shrinkage stress caused by polymerization.

Abstract: One-component heat-curable sealant composition for the protection of exposed dental surfaces, comprising (a) a polymerizable monomer and/or oligomer which has at least two polymerizable double bonds per molecule, and (b) an initiator system comprising benzoylperoxide in an amount of at least 2 wt.-% based on the total composition.

Abstract: One-component heat-curable sealant composition for the protection of exposed dental surfaces, comprising (a) a polymerisable monomer and/or oligomer which has at least two polymerizable double bonds per molecule, and (b) an initiator system comprising benzoylperoxide in an amount of at least 2 wt.-% based on the total composition.

Abstract: Dental composition comprising (i) a particulate filler; (ii) a polymerizable hydrolysis-stable compound of the following formula (1) AXn wherein A is a linker group containing at least n nitrogen atoms and optionally one or more acidic groups, X are moieties containing a polymerizable double bond and forming an amide bond with a nitrogen atom of A, which X may be the same or different and are represented by the following formula (2) wherein R1 and R2 are independent from each other and represent a hydrogen atom, a C1-6 alkyl group or a group —(CH2)m—Z, wherein Z is COOM, OPO3M2, PO3M2, SO3M, and M is independently a hydrogen atom or a metal atom, and m is an integer of from 0 to 6, L is a bond, a C1-6 alkylene group; and n is an integer of at least 1; provided that at least one X cannot be a (meth)acryl group; and (iii) an initiator system.

Abstract: Dental composition comprising a water-soluble polymerizable compound of the following formula (1): wherein A is a linear or branched linker group represented by the following formula (3), wherein the nitrogen atom of at least two of the termini forms an amide bond with an X moiety; wherein R? represents a hydrogen atom or a substituted or unsubstituted aliphatic or cycloaliphatic hydrocarbon group, wherein each R may be the same or different L1, L2, and L3 which may be the same or different, independently represent a single bond, or a C2-20 straight-chain, branched or cyclic hydrocarbon group optionally containing from 1 to 6 heteroatoms selected from nitrogen and oxygen in the backbone of the hydrocarbon group, and optionally from 1 to 6 functional groups selected from carboxylic acid groups or a salt thereof, hydroxyl groups, thiol groups and amino groups, and in case a plurality of L1 and L2 are present, each of L1 and L2 may be the same or different; Q1 and Q2, which may be the same or different, independ

Abstract: Dental cement composition comprising a polymerizable polyacidic polymer having repeating units in the polymer backbone, a polymerizable monomer having at least one polymerizable functional group; a radical polymerization initiator.

Abstract: A process for producing a water-soluble, hydrolysis-stable, polymerizable polymer, comprising a) a step of copolymerizing a mixture comprising (i) a first copolymerizable monomer comprising at least one optionally protected carboxylic acid group and a first polymerizable organic moiety, and (ii) a second copolymerizable monomer comprising one or more optionally protected primary and/or secondary amino groups and a second polymerizable organic moiety, for obtaining an amino group containing copolymer; b) a step of coupling to the amino group containing copolymer a compound having a polymerizable moiety and a functional group reactive with an amino group of repeating units derived from the second copolymerizable monomer in the amino group containing copolymer obtained in the first step wherein the optionally protected amino group is deprotected, so that polymerizable pendant groups are linked to the backbone by hydrolysis-stable linking groups, and, optionally, a step of deprotecting the protected carboxylic ac

Abstract: Dental composition comprising an aqueous mixture containing (i) a polymerizable acidic phosphoric acid ester monomer of the following formula (A): wherein a 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

Abstract: A process for the preparation of composite filler particles, comprising: (a) coating a particulate filler having a median particle size (D50) of from 1 to 1200 nm; (b) agglomerating the coated particulate filler, for providing a granulation of the coated particulate filler wherein the granulation contains the coated particulate filler particles whereby the at least one coating layer may be crosslinked by crosslinking groups obtained by reacting the reactive groups and optionally a further crosslinking agent.

Abstract: Dental adhesive composition having a pH of at least 5, which comprises an aqueous solution containing (a) a polymerizable N-substituted alkyl acrylic or acrylic acid amide monomer; (b) a water-soluble polymerizable carboxylic acid; and (c) a water-soluble organic solvent.