The invention relates to a dental opaquer composition which can be used to increase the opacity of zirconium oxide ceramics. In addition, the invention relates to a process for producing a dental restoration, in which the opacity of the zirconium oxide ceramic is increased by using the opaquer composition.

Dental material, which contains at least one radically polymerizable monomer, at least one radiopaque filler, at least one composite filler, at least one inorganic filler and at least one initiator for the radical polymerization. The dental material is particularly suitable as dental filling material.

The present invention provides a dental adhesive material kit that exhibits high adhesive property to tooth structure and dental prosthesis through photopolymerization while maintaining good ease of handling with the paste properties that undergo little change during long storage. The present invention relates to a dental adhesive material kit comprising: an aqueous adhesive dental composition (X) comprising a radical polymerizable monomer (a) containing an acidic group, a polymerization accelerator (b), water (c), and a radical polymerizable monomer (d) containing no acidic group; and a curable dental composition (Y) comprising a hydrophilic radical polymerizable monomer (d-1) containing no acidic group, a hydrophobic radical polymerizable monomer (d-2) containing no acidic group, a chemical polymerization initiator (e), a photopolymerization initiator (f), and a filler (g), the filler (g) being a filler treated with a surface treatment agent, and having an average particle diameter of 0.01 to 50.0 μm, the surface treatment agent comprising a silane coupling agent (A) represented by general formula [1], and an organosilazane (B) represented by general formula [2].

Disclosed are a dental gradient color-resin ceramic restoration material and a preparation method thereof. The method includes: preparing at least two paste materials with different colors, respectively dispersing the paste materials with different colors at a certain speed and under a vacuum of -0.01-0.1 MPa to obtain at least two granular materials with different colors having an average size of 0.1 mm to 5 mm; spreading the at least two granular materials with different colors to be flat in a mould in sequence to obtain at least two layers, and then tightly combining the at least two layers at a pressure of 0.5-5 MPa to obtain a semi-finished product of a gradient color-resin ceramic restoration material; polymerizing and curing the semi-finished product at 60-200° C. and 2-50 MPa to obtain a multilayer gradient color-resin ceramic restoration material.

Disclosed are a dental gradient color-resin ceramic restoration material and a preparation method thereof. The method includes: preparing at least two paste materials with different colors, respectively dispersing the paste materials with different colors at a certain speed and under a vacuum of -0.01-0.1 MPa to obtain at least two granular materials with different colors having an average size of 0.1 mm to 5 mm; spreading the at least two granular materials with different colors to be flat in a mould in sequence to obtain at least two layers, and then tightly combining the at least two layers at a pressure of 0.5-5 MPa to obtain a semi-finished product of a gradient color-resin ceramic restoration material; polymerizing and curing the semi-finished product at 60-200° C. and 2-50 MPa to obtain a multilayer gradient color-resin ceramic restoration material.

A photocurable composition includes a photopolymerizable component and a photopolymerization initiator. In a case in which a rectangular sheet-like test piece is produced by photomodeling under conditions in which the photocurable composition is irradiated with visible light having a wavelength of 405 nm at an irradiation dose of 12 mJ/cm.sup.2 to form a cured layer with a thickness of 50 .Math.m, the cured layer is stacked in a thickness direction thereof to form a rectangular sheet-like modeling product with a length of 40 mm, a width of 10 mm, and a thickness of 1 mm, and the modeling product is irradiated with ultraviolet rays having a wavelength of 365 nm at an irradiation dose of 10 J/cm.sup.2 to produce the test piece, the test piece has an X-ray absorption coefficient of from 9.0 cm.sup.-1 to 34.0 cm.sup.-1.

A dental restoration composite resin contains a polymerizable monomer, a chain transfer agent, and inorganic particles, wherein the inorganic particles contain inorganic particles (A) having a volume-median particle size in the range of 0.1 μm to 0.9 μm, the inorganic particles (A) being surface-treated with compounds represented by the general formula (1), the general formula (2), or both.

A system includes a dental appliance having a polymeric shell with a plurality of cavities for receiving one or more teeth; and a biocompatible cosmetic aqueous liquid in the cavities of the polymeric shell of the dental appliance. The aqueous liquid includes a viscosity modifier chosen from a water compatible polymer, a polysaccharide, a silica compound, and mixtures and combinations thereof, a tooth re-mineralizing agent, and water. The aqueous liquid is substantially free of tooth whitening agents and fluoride, and has a refractive index of greater than 1.3 at room temperature.

A system includes a dental appliance having a polymeric shell with a plurality of cavities for receiving one or more teeth; and a biocompatible cosmetic aqueous liquid in the cavities of the polymeric shell of the dental appliance. The aqueous liquid includes a viscosity modifier chosen from a water compatible polymer, a polysaccharide, a silica compound, and mixtures and combinations thereof, a tooth re-mineralizing agent, and water. The aqueous liquid is substantially free of tooth whitening agents and fluoride, and has a refractive index of greater than 1.3 at room temperature.

A radically polymerizable composition having at least one acidic radically polymerizable monomer, at least one fluoroaluminosilicate glass filler and/or radiopaque glass filler, and at least one masking agent in solid form.