DENTAL CURABLE COMPOSITION AND DENTAL FLOWABLE COMPOSITE RESIN

摘要

The present invention provides a dental curable composition suitable as a flowable composite resin. The dental curable composition, when in the form of a cured product, has excellent mechanical strength, polishability, and gloss retention, and, when in the form of a paste, has consistency appropriate for discharge through a needle attached to the tip of a syringe and exhibits good formability and handling properties after discharge through the needle. The present invention is a dental curable composition including: a polymerizable monomer (A); irregularly-shaped inorganic particles (B) having an average particle diameter of 0.1 to 0.3 μm and surface-treated with a silane coupling agent having a particular structure; and inorganic ultrafine particles (C) having an average particle diameter of 5 to 50 nm and surface-treated with a silane coupling agent having a particular structure, the dental curable composition containing 92.5 to 98 weight % of the irregularly-shaped inorganic particles (B) and 2 to 7.5 weight % of the inorganic ultrafine particles (C) relative to the amount of total inorganic particles and having a consistency of 25 to 55.

主权项

1. A dental curable composition comprising:
a polymerizable monomer (A); irregularly-shaped inorganic particles (B) having an average particle diameter of 0.1 to 0.3 μm and surface-treated with a silane coupling agent (a) represented by the following formula (1):
CH2═C(R1)—COO—(CH2)q—SiR2pR3(3-p)  (1)where R1 represents a hydrogen atom or a methyl group, R2 represents a hydrolyzable group, R3 represents a hydrocarbon group having 1 to 6 carbon atoms, p is an integer of 2 or 3, and q is an integer of 8 to 13; and
inorganic ultrafine particles (C) having an average particle diameter of 5 to 50 nm and surface-treated with a silane coupling agent (b) represented by a formula that is the same as the formula (1) representing the silane coupling agent (a) except that q is an integer of 1 to 6, the dental curable composition containing 92.5 to 98 weight % of the irregularly-shaped inorganic particles (B) and 2 to 7.5 weight % of the inorganic ultrafine particles (C) relative to the amount of total inorganic particles, the dental curable composition having a consistency of 25 to 55.