Dental composition
AssigneeKuraray Noritake Dental Inc.
InventorRyo MATSUURA
Life of this patent
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Abstract
An object of the present invention is to provide a dental composition that exhibits small polymerization shrinkage stress, and provides excellent mechanical strength. The present invention relates to a dental composition comprising a compound (A) having a weight-average molecular weight of 2,000 or more, a monomer (B), and a polymerization initiator (C), wherein the compound (A) having a weight-average molecular weight of 2,000 or more has a glass transition region including a temperature range of 20 to 40° C., and the monomer (B) excludes the compound (A) having a weight-average molecular weight of 2,000 or more. The compound (A) having a weight-average molecular weight of 2,000 or more has a weight-average molecular weight of preferably less than 50,000.
Claims14
1:
- A dental composition comprising a compound (A) having a weight-average molecular weight of 2,000 or more, a monomer (B), and a polymerization initiator (C), wherein the compound (A) having a weight-average molecular weight of 2,000 or more has a glass transition region including a temperature range of 20 to 40° C., and the monomer (B) excludes the compound (A) having a weight-average molecular weight of 2,000 or more.
2:
- The dental composition according to claim 1, wherein the compound (A) having a weight-average molecular weight of 2,000 or more has a weight-average molecular weight of less than 50,000.
3:
- The dental composition according to claim 1, wherein the compound (A) having a weight-average molecular weight of 2,000 or more has a urethane bond.
4:
- The dental composition according to claim 3, wherein the compound (A) having a weight-average molecular weight of 2,000 or more is a urethanized (meth)acrylic compound (A-1).
5:
- The dental composition according to claim 1, wherein the compound (A) having a weight-average molecular weight of 2,000 or more has a glass transition temperature at 20° C. or less.
6:
- The dental composition according to claim 1, wherein the compound (A) having a weight-average molecular weight of 2,000 or more is 0.1 to 50 parts by mass in total 100 parts by mass of the compound (A) having a weight-average molecular weight of 2,000 or more, and the monomer (B).
7:
- The dental composition according to claim 1, wherein the compound (A) having a weight-average molecular weight of 2,000 or more has two or more glass transition temperatures.
8:
- The dental composition according to claim 7, wherein the compound (A) having a weight-average molecular weight of 2,000 or more has one or more glass transition temperatures in a temperature region of −100° C. or more and 20° C. or less, and one or more glass transition temperatures in a temperature region of 20° C. or more and less than 80° C.
9:
- The dental composition according to claim 1, wherein the monomer (B) comprises a monomer (B-1) having an acidic group.
10:
- The dental composition according to claim 1, which further comprises a filler (D).
11:
- The dental composition according to claim 1, wherein the compound (A) having a weight-average molecular weight of 2,000 or more has a polymerizable group, and has a weight-average molecular weight of 1,250 or more and less than 20,000 per its polymerizable group.
12:
- A dental composite resin comprising a dental composition of claim 1.
13:
- A self-adhesive dental composite resin comprising a dental composition of claim 1.
14:
- A dental cement comprising a dental composition of claim 1.