Dental porcelain paste

WO2026141507A1PCT designated stage Publication Date: 2026-07-02KURARAY NORITAKE DENTAL
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
KURARAY NORITAKE DENTAL
Filing Date
2025-12-24
Publication Date
2026-07-02

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Abstract

The present invention relates to: a dental porcelain paste containing a glass powder (A), a resin (B), a solvent (C) that dissolves the resin (B), and a solvent (D) that does not dissolve the resin (B); and a method for producing a dental prosthesis, the method comprising a step for applying the dental porcelain paste to a base material of a dental prosthesis having a ceramic surface, and a step for newly building up the dental porcelain paste without firing the base material to which the dental porcelain paste was applied, and then firing the dental porcelain paste.
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Claims

1. A dental porcelain paste comprising glass powder (A), resin (B), a solvent (C) that dissolves the resin (B), and a solvent (D) that does not dissolve the resin (B).

2. The dental porcelain paste according to claim 1, wherein the relative evaporation rate of the solvent (D), as measured in accordance with ASTM-D3539, is greater than 1.

0.

3. The dental porcelain paste according to claim 1 or 2, wherein the boiling point of the solvent (C) is 140°C or lower.

4. The dental porcelain paste according to claim 1 or 2, wherein the boiling point of the solvent (D) is 140°C or lower.

5. The dental porcelain paste according to claim 1 or 2, wherein the content of solvent (C) is 5 to 75% by mass of the total content of solvent (C) and solvent (D) in 100% by mass.

6. The dental porcelain paste according to claim 1 or 2, wherein the content of the resin (B) is 2 to 30% by mass of the total content of the glass powder (A) and the resin (B) in 100% by mass.

7. The dental porcelain paste according to claim 1 or 2, wherein the total content of the glass powder (A) and the resin (B) is 40 to 80% by mass of the total amount of the dental porcelain paste.

8. The dental porcelain paste according to claim 1 or 2, wherein the total content of solvent (C) and solvent (D) is 20 to 60% by mass of the total amount of the dental porcelain paste.

9. The dental porcelain paste according to claim 1 or 2, wherein the resin (B) is a poly(meth)acrylic compound.

10. A method for manufacturing a dental prosthesis, comprising the steps of: applying a dental porcelain paste according to claim 1 or 2 to a substrate of a dental prosthesis having a ceramic surface; and firing the substrate to which the dental porcelain paste has been applied, after building up a new layer of the dental porcelain paste.