Provided is a biostable radiopaque substance that is absorbed within living tissue or inflammatory lesion in living tissue and uses thereof. The radiopaque substance does not cause an inflammatory reaction in surrounding tissue and is rapidly absorbed before healing occurs, thereby not interfering with healing and regeneration of damaged tissue. Therefore, the radiopaque substance of the present disclosure can be included in a biotransplantation material, for example, a root canal filling material for endodontic treatment, and be effectively used.

The present invention provides a dental ceramic coloring solution with which shades with the desired yellow tint can be imparted to a dental ceramic without causing fading, even when the dental ceramic colored with the coloring solution is baked after building up porcelain. The present invention relates to a coloring solution for coloring a dental ceramic, comprising a coloring component and a solvent, wherein the coloring component comprises a V component.

The present invention provides a dental ceramic coloring solution with which shades with the desired yellow tint can be imparted to a dental ceramic without causing fading, even when the dental ceramic colored with the coloring solution is baked after building up porcelain. The present invention relates to a coloring solution for coloring a dental ceramic, comprising a coloring component and a solvent, wherein the coloring component comprises a V component.

The invention relates to a set of porous zirconia dental mill blanks comprising at least two differently colored porous zirconia dental mill blanks, the porous zirconia dental mill blanks comprising zirconia, yttria, coloring ions, and optionally alumina, comprising multiple layers with different yttria content, having a bottom layer and a top layer, the content of yttria and coloring ions in mol % changing in opposite direction to each other from the bottom layer to the top layer, and the content of yttria and coloring ions in mol % being adjusted to provide an essentially constant ratio of the sum of yttria and coloring ions in mol % between the top layer and the bottom layer for the at least two differently colored zirconia dental mill blanks. The invention also relates to a process of producing such a set.

[Problem] To provide a photocurable composition having a high curing depth. [Solution] To provide a photocurable composition of the present disclosure comprises (A) polymerizable monomer, (B) photosensitizer, (C) photoacid generator, and (D) photopolymerization accelerator, wherein, the photocurable composition comprises (D-1) amine compound represented by formula (1) as the (D) photopolymerization accelerator. ##STR00001##
(In the formula (1), R.sub.1 is a substituent represented by formula (2), and R.sub.2 and R.sub.3 are substituents represented by formula (2) or substituents selected from —OH group, —O— group, —S— group, —NH—C(O)—NH— group, —C(O)—O— group, —OC(O)— group, —OC(O)—NH— group, —NH—C(O)—O— group, halogen, an organic group which may have an alkoxysilyl group, an aromatic ring which may have a substituent and an alicyclic heterocycle which may have a substituent. Further, R.sub.2 and R.sub.3 may be H when at least one or more R.sub.4s of the formula (2) are an aromatic ring, and R.sub.3 may be H when R.sub.2 is a substituent represented by the formula (2)).

[Problem] To provide a photocurable composition having a high curing depth. [Solution] To provide a photocurable composition of the present disclosure comprises (A) polymerizable monomer, (B) photosensitizer, (C) photoacid generator, and (D) photopolymerization accelerator, wherein, the photocurable composition comprises (D-1) amine compound represented by formula (1) as the (D) photopolymerization accelerator. ##STR00001##
(In the formula (1), R.sub.1 is a substituent represented by formula (2), and R.sub.2 and R.sub.3 are substituents represented by formula (2) or substituents selected from —OH group, —O— group, —S— group, —NH—C(O)—NH— group, —C(O)—O— group, —OC(O)— group, —OC(O)—NH— group, —NH—C(O)—O— group, halogen, an organic group which may have an alkoxysilyl group, an aromatic ring which may have a substituent and an alicyclic heterocycle which may have a substituent. Further, R.sub.2 and R.sub.3 may be H when at least one or more R.sub.4s of the formula (2) are an aromatic ring, and R.sub.3 may be H when R.sub.2 is a substituent represented by the formula (2)).

The present invention provides a dental ceramic coloring solution with which the desired shade can be imparted to a dental ceramic while improving the strength of the dental ceramic. The present invention relates to a coloring solution for coloring a dental ceramic, comprising a coloring component, a solvent, and a Zr component.

The present invention provides a dental ceramic coloring solution with which the desired shade can be imparted to a dental ceramic while improving the strength of the dental ceramic. The present invention relates to a coloring solution for coloring a dental ceramic, comprising a coloring component, a solvent, and a Zr component.

The present invention provides a dental curable composition that enables a highly aesthetic restoration that blends in so well with the surroundings that it is almost indistinguishable from natural teeth, and that, despite being a single dental curable composition, shows good color compatibility with natural teeth over a wide range of shades, particularly in cases involving cavity floors in different classes of cavities, such as Class I, Class II, and Class V The present invention relates to a dental curable composition comprising a polymerizable monomer (A), a filler (B), a polymerization initiator (C), and a colorant (D), wherein the ratios R.sub.650/600, R.sub.700/600, and R.sub.750/600 of spectral reflectances at 650 nm, 700 nm, and 750 nm wavelengths to a spectral reflectance at 600 nm wavelength all fall within a range of 97% to 103% when measured for a 1.0 mm-thick cured product of the dental curable composition against a white background with a spectral colorimeter.

The present invention provides a dental curable composition that enables a highly aesthetic restoration that blends in so well with the surroundings that it is almost indistinguishable from natural teeth, and that, despite being a single dental curable composition, shows good color compatibility with natural teeth over a wide range of shades, particularly in cases involving cavity floors in different classes of cavities, such as Class I, Class II, and Class V The present invention relates to a dental curable composition comprising a polymerizable monomer (A), a filler (B), a polymerization initiator (C), and a colorant (D), wherein the ratios R.sub.650/600, R.sub.700/600, and R.sub.750/600 of spectral reflectances at 650 nm, 700 nm, and 750 nm wavelengths to a spectral reflectance at 600 nm wavelength all fall within a range of 97% to 103% when measured for a 1.0 mm-thick cured product of the dental curable composition against a white background with a spectral colorimeter.