Polymerizable monomer, polymerizable composition, and dental material

Abstract

The present invention provides a polymerizable composition that exhibits excellent adhesive properties to a tooth structure (particularly dentin) when applied as a dental material, and a polymerizable monomer that is used as a component of the polymerizable composition. The present invention is a polymerizable monomer (A) that is a compound having at least two polymerizable groups. The polymerizable monomer (A) has a retention time of 7 minutes to 30 minutes in a high-performance liquid chromatography (HPLC) measurement conducted under a condition in which a column with an inner diameter of 3.9 mm and a length of 300 mm, packed with a C18 packing material having been crushed to have an average particle size of 10 μm and a pore size of 125 angstroms, is used, an eluent is a mixed solvent of methanol and water contained at a ratio of 3:7, a flow rate is 1.0 mL / minute, a measurement temperature is 50° C., a sample injection volume is 10 μL, and a dead volume from a sample inlet to a detection point excluding the column is 87 μL. The present invention also is a composition containing the polymerizable monomer (A).

Description

TECHNICAL FIELD[0001]The present invention relates to a hydrophilic polymerizable monomer that is used mainly for dental materials and that has a plurality of polymerizable groups. The present invention also relates to a polymerizable composition containing the polymerizable monomer. The present invention also relates to dental materials using the composition, such as dental primers, bonding materials, cements, and composite resins.BACKGROUND ART[0002]When a lost part of a tooth is filled or covered with a restorative material, generally a dental adhesive is used. A known dental adhesive is one containing a polymerizable monomer having a polymerizable group and a hydroxyl group.[0003]For example, WO 2004 / 047773 describes a dental adhesive composition characterized by containing a polyfunctional polymerizable monomer that is an ester compound of polyhydric alcohol having 3 to 6 carbon atoms and a plurality of (meth)acrylic acids and that has one to two hydroxyl groups, a monofunction...

AI Technical Summary

Benefits of technology

[0006]The present invention is intended to provide a polymerizable composition that exhibits excellent adhesive properties to a tooth structure (particularly dentin) when it is applied as a dental material, and a polymerizable monomer that is used as a component of the polymerizable composition. The present invention also is intended to provide a dental material that is excellent in adhesive properties to a tooth structure (particularly dentin).

[0018]The polymerizable monomer (A) of the present invention is a hydrophilic compound having a plurality of polymerizable groups. Thus, the polymerizable monomer (A) of the present invention is useful for applications that require the polymerizable monomer (A) to be curable and applications that require a polymer of the polymerizable monomer (A) to be hydrophilic. The composition containing the polymerizable monomer (A) of the present invention is useful for various applications including dental applications. Especially, the dental materials, such as a dental primer, bonding material, cement, and composite resin, using the composition have excellent adhesive properties to a tooth structure (particularly dentin).

Problems solved by technology

This composition is, however, not necessarily excellent in penetrability into a collagen layer of dentin and may cause a reduction in bond strength, and therefore improvement in this respect has been desired.

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