Radically polymerisable dental material, cured product and usage
First Claim
1. A radically polymerizable dental material containing the components:
- a) at least one curable aliphatic and/or cycloaliphatic monomer system having a refractive index as measured at 23°
C. and at a wavelength of 589 nm of less than or equal to 1.50, that contains at least one aliphatic and/or cycloaliphatic bis(meth)acrylate and/or at least one aliphatic and/or cycloaliphatic bis(meth)acrylamide in a mixture comprising aliphatic and/or cycloaliphatic bis(meth)acrylate monomers,wherein at least one of the monomers comprises one or several urethane groups, and at least one of the monomers does not comprise a urethane group,wherein the content of urethane-group-containing (meth)acrylate monomers in the monomer mixture is ≧
50% by weight, relative to the monomer mixture, andwherein the monomer mixture contains 1 to 20% by weight relative to the total amount of component a) of low viscous (meth)acrylate and/or bis(meth)acrylate free of aromatic compounds, urethane groups and urea groups, having a viscosity of less than 2000 mPa·
s as measured at a temperature of 23°
C. with a cone/plate geometry of (35 mm, 4°
), and a shear stress of 50 Pa,b) 15 to 80% by weight relative to the total mass of the dental material of at least one filler selected from the group offused silica having a refractive index as measured at 23°
C. and at a wavelength of 589 nm of 1.45 to 1.47, andcristobalite having a refractive index measured at 23°
C. and at a wavelength of 589 nm of 1.48 to 1.49,or their combinations, ande) an initiator for radical polymerization,wherein the dental material contains in component a) 1 to 20% by weight relative to the total amount of the component a) of a polytetramethylene glycol di(meth)acrylate having an average molecular weight of 300 g/mol to 1000 g/mol, a viscosity of less than 2000 mPa·
s as measured at a temperature of 23°
C. with a cone/plate geometry of (35 mm, 4°
) and a shear stress of 50 Pa, as an impact strength modifying (meth)acrylate monomer,provided, that the radically polymerizable dental material does not contain compounds comprising Bisphenol A groups.
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Accused Products
Abstract
The invention relates to a polymerizable dental material containing a) at least one curable aliphatic and/or cycloaliphatic monomer system having a refractive index that is measured at 23° C. and a wavelength of 589 nm of less than or equal to 1.50 that contains at least one aliphatic and/or cycloaliphatic bis(meth)acrylate and/or at least one aliphatic and/or cycloaliphatic bis(meth)acrylamide; and b) 15 to 80% by weight relative to the total mass of the dental material of at least one filler selected from the group of fused silica having a refractive index that is measured at 23° C. and a wavelength of 589 nm of 1.45 to 1.47, or cristobalite with a refractive index that is measured at 23° C. and a wavelength of 589 nm of 1.48 to 1.49, or combinations thereof. The radically polymerizable dental material has excellent storage properties and is formulated, in particular, as a two-component mixture containing components A and B. Subsequent to mixing components A and B, the polymerizable mixture cures quickly in the conditions present in the mouth and forms cured masses having outstanding mechanical and optical properties. The cured products can be used, in particular, for producing crowns and bridge material and as core buildup material.
28 Citations
29 Claims
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1. A radically polymerizable dental material containing the components:
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a) at least one curable aliphatic and/or cycloaliphatic monomer system having a refractive index as measured at 23°
C. and at a wavelength of 589 nm of less than or equal to 1.50, that contains at least one aliphatic and/or cycloaliphatic bis(meth)acrylate and/or at least one aliphatic and/or cycloaliphatic bis(meth)acrylamide in a mixture comprising aliphatic and/or cycloaliphatic bis(meth)acrylate monomers,wherein at least one of the monomers comprises one or several urethane groups, and at least one of the monomers does not comprise a urethane group, wherein the content of urethane-group-containing (meth)acrylate monomers in the monomer mixture is ≧
50% by weight, relative to the monomer mixture, andwherein the monomer mixture contains 1 to 20% by weight relative to the total amount of component a) of low viscous (meth)acrylate and/or bis(meth)acrylate free of aromatic compounds, urethane groups and urea groups, having a viscosity of less than 2000 mPa·
s as measured at a temperature of 23°
C. with a cone/plate geometry of (35 mm, 4°
), and a shear stress of 50 Pa,b) 15 to 80% by weight relative to the total mass of the dental material of at least one filler selected from the group of fused silica having a refractive index as measured at 23°
C. and at a wavelength of 589 nm of 1.45 to 1.47, andcristobalite having a refractive index measured at 23°
C. and at a wavelength of 589 nm of 1.48 to 1.49,or their combinations, and e) an initiator for radical polymerization, wherein the dental material contains in component a) 1 to 20% by weight relative to the total amount of the component a) of a polytetramethylene glycol di(meth)acrylate having an average molecular weight of 300 g/mol to 1000 g/mol, a viscosity of less than 2000 mPa·
s as measured at a temperature of 23°
C. with a cone/plate geometry of (35 mm, 4°
) and a shear stress of 50 Pa, as an impact strength modifying (meth)acrylate monomer,provided, that the radically polymerizable dental material does not contain compounds comprising Bisphenol A groups. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A radically polymerizable dental material containing the components:
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a) at least one curable aliphatic and/or cycloaliphatic monomer system having a refractive index at 23°
C. and at a wavelength of 589 nm that is less than or equal to 1.50, that contains at least one aliphatic and/or cycloaliphatic bis(meth)acrylate and/or at least one aliphatic and/or cycloaliphatic bis(meth)acrylamide,b) 15 to 80% by weight relative to the total mass of the dental material of at least one filler selected from the group of fused silica having a refractive index at 23°
C. and at a wavelength of 589 nm of 1.45 to 1.47, andcristobalite having a refractive index at 23°
C. and at a wavelength of 589 nm of 1.48 to 1.49,or their combinations, and c) 5 to 50% by weight relative to the total mass of the dental material of an X-ray-opaque filler c) that contains an irregularly shaped or spherical YbF3—
or YF3-powder having an average grain size of the primary particles of 40 nm to 1.5 μ
m, which is a core/shell combination product consisting of YF3—
or YbF3-core and SiO2 shell, wherein the SiO2 shell surface is silanized,provided that the radically polymerizable dental material does not contain compounds comprising Bisphenol A groups. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification