US4386912A
Expired / Lapsed
US
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Method for filling tooth cavities employing a polymerizable urethane cement composition
Assignee: Kuraray Co Ltd
•
Filing: 1982-04-26
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Granted: 1983-06-07
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Expires: 2002-04-26
Abstract
Abstract A cement composition which comprises a filler, a binder to be used in admixture with the filler, and a curing agent for polymerizing the binder, which is characterized by that the binder comprises, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formula: <IMAGE> wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free-radical polymerizable monomer which is copolymerizable with the above monomer (A) is disclosed. By using the above binder, the filler is firmly bonded with each other and gives a cured product having high compressive strength and abrasion resistance. The cement composition is especially useful as dental restorative materials.
Inventors
- 👤 Yoshinori Nagase
- 👤 Kyoichiro Shibatani
- 👤 Junichi Yamauchi
- 👤 Ikuo Omura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:05
CPC Classifications
C; C04; C04B; C04B26/00; C04B26/02; C04B26/04; A; A61; A61K; A61K6/00; A61K6/30; A61K6/80; A61K6/884; A61K6/887; A61K6/891; A61K6/893; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; Y; Y10; Y10S; Y10S522/00; Y10S522/908
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
109 words
A method for restoring tooth cavities which comprises filling a tooth cavity with a dental filling material which comprises (a) a filler, (b) a binder to be used in admixture with the filler, and (c) a curing agent for polymerizing the binder, said binder comprising, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formura: ##STR16## wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free-radical polymerizable monomer which is copolymerizable with the above monomer (A).
Claim 2
Independent Claim
109 words
A method for restoring tooth cavities which comprises filling a tooth cavity with a dental filling material which comprises (a) a filler, (b) a binder to be used in admixture with the filler, and (c) a curing agent for polymerizing the binder, said binder comprising, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formura: ##STR16## wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free-radical polymerizable monomer which is copolymerizable with the above monomer (A).
Claim 3
Dependent Claim
30 words
The method for restoring tooth cavities according to claim 1 in which X is an aliphatic, aromatic or alicyclic hydrocarbon residue the backbone of which may be interrupted by oxygen.
Claim 4
Dependent Claim
21 words
The method for restoring tooth cavities according to claim 2 in which X is an alkylene group having 6-20 carbon atoms.
Claim 5
Dependent Claim
15 words
The method for restoring tooth cavities according to claim 3 in which X is ##STR17##
Claim 6
Dependent Claim
19 words
The method for restoring tooth cavities according to claim 3 in which X is --(CH 2 ) 6 --.
Claim 7
Dependent Claim
39 words
The method for restoring tooth cavities according to claim 1 in which the monomer (B) is a monomer of the formula: ##STR18## wherein Y is an organic residue having 1-50 carbon atoms, and m is 1, 2 or 3.
Claim 8
Dependent Claim
26 words
The method for restoring tooth cavities according to claim 6 in which m is 1, and Y is an aliphatic hydrocarbon residue having 1-4 carbon atoms.
Claim 9
Dependent Claim
18 words
The method for restoring tooth cavities according to claim 7 in which the monomer (B) is methyl methacrylate.
Claim 10
Dependent Claim
25 words
The method for restoring tooth cavities according to claim 6 in which m is 2, and Y is an alkylene group having 2-8 carbon atoms.
Claim 11
Dependent Claim
19 words
The method for restoring tooth cavities according to claim 9 in which the monomer (B) is neopentyl glycol dimethacrylate.
Claim 12
Dependent Claim
35 words
The method for restoring tooth cavities according to claim 6 in which m is 2, and Y is CH 2 CH 2 (OCH 2 CH 2 ) n wherein n is an integer of 0-13.
Claim 13
Dependent Claim
19 words
The method for restoring tooth cavities according to claim 11 in which the monomer (B) is triethylene glycol dimethacrylate.
Claim 14
Dependent Claim
29 words
The method for restoring tooth cavities according to claim 6 in which m is 2, and Y is a residue of a bisphenol A derivative having 15-25 carbon atoms.
Claim 15
Dependent Claim
17 words
The method for restoring tooth cavities according to claim 13 in which the monomer (B) is 2,2'-bis[p-(γ-methacryloxy-β-hydroxypropoxy)phenyl]propane.
Claim 16
Dependent Claim
25 words
The method for restoring tooth cavities according to claim 6 in which m is 2, and Y is ##STR19## wherein p is 1 or 2.
Claim 17
Dependent Claim
17 words
The method for restoring tooth cavities according to claim 15 in which the monomer (B) is 1,2-bis[3-(meth)acryloxy-2-hydroxypropoxy]ethane.
Claim 18
Dependent Claim
30 words
The method for restoring tooth cavities according to claim 1 in which the binder comprises 20-95% by weight of the monomer (A) and 80-5% by weight of the monomer (B).
Claim 19
Dependent Claim
39 words
The method for restoring tooth cavities according to claim 1 wherein said filler is a mixture of a filler having an average particle size of 0.2-20μ and a microfine particle filler having an average particle size of 10-50 mμ.
References Cited (Backward Citations)
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US4243578A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |