The invention relates to A curable composition for producing dental composite crowns, the composition comprising a resin matrix comprising polymerizable (meth)acrylate(s) not comprising a urethane moiety, polymerizable urethane(meth)acrylate(s), wherein the polymerizable (meth)acrylate(s) not comprising an urethane moiety are used in excess over the polymerizable urethane(meth)acrylate(s), a filler matrix comprising nanocluster(s), fumed silica in an amount below 8 wt. % with respect to the weight of the whole composition, an initiator system comprising photoinitiator(s), organic dye(s), the curable composition not comprising softener in an amount of more than 5 wt. % with respect to the weight of the whole composition, the curable composition having a viscosity below 150 Pa*s at 23° C. and a shear rate of 1 s.sup.−1. The invention also relates to a cured article obtained by radiation curing this curable composition by use of an additive-manufacturing method.

The invention relates to A curable composition for producing dental composite crowns, the composition comprising a resin matrix comprising polymerizable (meth)acrylate(s) not comprising a urethane moiety, polymerizable urethane(meth)acrylate(s), wherein the polymerizable (meth)acrylate(s) not comprising an urethane moiety are used in excess over the polymerizable urethane(meth)acrylate(s), a filler matrix comprising nanocluster(s), fumed silica in an amount below 8 wt. % with respect to the weight of the whole composition, an initiator system comprising photoinitiator(s), organic dye(s), the curable composition not comprising softener in an amount of more than 5 wt. % with respect to the weight of the whole composition, the curable composition having a viscosity below 150 Pa*s at 23° C. and a shear rate of 1 s.sup.−1. The invention also relates to a cured article obtained by radiation curing this curable composition by use of an additive-manufacturing method.

[Problem]

To provide a dental curable composition having good mechanical property and good storage stability before and after curing.

Solution

The dental curable composition of the present disclosure comprises (A) polymerizable monomer, (BC) polymerization initiator, (D) polymerization accelerator and (E) filler, wherein, the (BC) polymerization initiator comprises (B) photopolymerization initiator and/or (C) chemical polymerization initiator, the (B) photopolymerization initiator comprises (B1) photosensitizer and (B2) photoacid generator, the (C) chemical polymerization initiator comprises (C1) organic peroxide, the (E) filler comprises (E1) surface-treated basic filler, and the (E1) surface-treated basic filler is treated with (F1) surface treatment agent represented by the formula (1) and/or condensate thereof.

[Formula (1)]

MX.sub.n  [Chemical formula 1]

(In the formula, M is a metal atom selected from Si, Ti, Zr, and Al, X is H, OH or a hydrolyzable group, and may be the same or different from each other. In the case that M is Si, Ti or Zr, n is 4. In the case that M is Al, n is 3.)

[Problem]

To provide a dental curable composition having good mechanical property and good storage stability before and after curing.

Solution

The dental curable composition of the present disclosure comprises (A) polymerizable monomer, (BC) polymerization initiator, (D) polymerization accelerator and (E) filler, wherein, the (BC) polymerization initiator comprises (B) photopolymerization initiator and/or (C) chemical polymerization initiator, the (B) photopolymerization initiator comprises (B1) photosensitizer and (B2) photoacid generator, the (C) chemical polymerization initiator comprises (C1) organic peroxide, the (E) filler comprises (E1) surface-treated basic filler, and the (E1) surface-treated basic filler is treated with (F1) surface treatment agent represented by the formula (1) and/or condensate thereof.

[Formula (1)]

MX.sub.n  [Chemical formula 1]

(In the formula, M is a metal atom selected from Si, Ti, Zr, and Al, X is H, OH or a hydrolyzable group, and may be the same or different from each other. In the case that M is Si, Ti or Zr, n is 4. In the case that M is Al, n is 3.)

Disclosed are a dental material with transmittance and color gradients and a method of preparing the dental material. The method includes (1) preparing at least three types of composite resin material precursor powders; (2) sequentially adding the precursor powders into a mold and performing dry pressing to obtain a preform body; alternatively, (2′) dry pressing the first type of precursor powder into a first green body, wrapping the first green body with the second type of precursor powder and then performing dry pressing to obtain a second green body, and repeating the wrapping and dry pressing operations until all types of precursor powder are dry pressed to obtain a preform body; and (3) performing hot-pressing consolidation on the preform body to obtain the desired dental material.

Disclosed are a dental material with transmittance and color gradients and a method of preparing the dental material. The method includes (1) preparing at least three types of composite resin material precursor powders; (2) sequentially adding the precursor powders into a mold and performing dry pressing to obtain a preform body; alternatively, (2′) dry pressing the first type of precursor powder into a first green body, wrapping the first green body with the second type of precursor powder and then performing dry pressing to obtain a second green body, and repeating the wrapping and dry pressing operations until all types of precursor powder are dry pressed to obtain a preform body; and (3) performing hot-pressing consolidation on the preform body to obtain the desired dental material.

A dental glass ionomer cement composition that exhibits high mechanical properties. In particular, the dental glass ionomer cement composition of the present disclosure comprising (a) non-crosslinked polyalkenoic acid, (b) water, (c) crosslinked polyalkenoic acid: 0.01 to 10 wt. %, and (d) acid-reactive glass powder, exhibits extremely high compressive strength by including the crosslinked polyalkenoic acid in the specified content range.

A dental glass ionomer cement composition that exhibits high mechanical properties. In particular, the dental glass ionomer cement composition of the present disclosure comprising (a) non-crosslinked polyalkenoic acid, (b) water, (c) crosslinked polyalkenoic acid: 0.01 to 10 wt. %, and (d) acid-reactive glass powder, exhibits extremely high compressive strength by including the crosslinked polyalkenoic acid in the specified content range.

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.

One aspect of the present invention is: a dental glass ionomer cement including a first agent containing an ionomer glass powder; and a second agent containing a polycarboxylic acid polymer and water, wherein the first agent further contains a water-soluble compound represented by general formula (1):

##STR00001##

where R.sup.1 is a hydrogen atom or a methyl group, X.sup.1 is —O— or —NH—, and L.sup.1 is an alkylene group, and a water-soluble compound represented by general formula (2):

##STR00002##

where R.sup.2 is a hydrogen atom or a methyl group, X.sup.2 is —O— or —NH—, L.sup.2 is an alkyleneoxy group, R.sup.3 is an n-valent organic group, m is an integer of 1 or more and 42 or less, and n is an integer of 2 or more and 6 or less.