US4440878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin-forming material, implant material and compositions for restorative material suitable for medical or dental use
Assignee: Kanebo Ltd
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Filing: 1982-01-20
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Granted: 1984-04-03
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Expires: 2002-01-20
Abstract
Abstract Resin-forming material suitable for medical or dental use comprising tetramethylolmethane tri- or tetracrylate or tetramethylolmethane tri- or tetramethacrylate; and implant material suitable for medical or dental use comprising nitride of at least one member of metal selected from the group consisting of Group IVB, Group VB and Group VIB in the periodic table of elements and boron, aluminum and silicon and having Mohs' scale of hardness of at least 7.
Inventors
- 👤 Haruyuki Kawahara
- 👤 Teruo Makita
- 👤 Shozo Kudo
- 👤 Takashi Funakoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/446; A61K; A61K6/00; A61K6/70; A61K6/71; A61K6/76; A61K6/77; A61K6/80; A61K6/831; A61K6/838; A61L24/00; A61L24/0047; A61L24/0073; A61L24/0089; A61L27/14; A61L27/16; A61L2430/00; A61L2430/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
258 words
A dental filling material, consisting essentially of: (A) from about 50 to about 95% by weight of finely divided, inorganic filler material which is safe and effective for use in a dental filling in the human body, wherein at least 50% by weight of said filler material is at least one nitride substance having a Moh's hardness of at least 7 and is selected from the group consisting of vanadium nitride, boron nitride, aluminum nitride, silicon nitride, titanium nitride and zirconium nitride, and the balance of said filler material is one or more inorganic dental filler substances which are different from said nitride substance, having a Moh's hardness of at least 5 and are useful as a filler for dental filling materials, and (B) from about 50 to about 5% by weight of polymerizable monomer component capable of polymerizing to form a binder resin for dental filling materials, said polymerizable monomer component being selected from the group consisting of (1) monomers having the formula ##STR11## wherein R is hydrogen or methyl, X is alkylidene and Y is oxyalkylene having from 2 to 5 carbon atoms, (2) monomers having the formula ##STR12## wherein R 1 is CH 3 , CH 3 CH 2 or CH 3 CH 2 CH 2 , and R 2 is H or CH 3 , (3) monomers having the formula ##STR13## wherein R 1 is hydrogen or methyl, R 2 is alkylene and R 3 is a divalent hydrocarbon group, (4) neopentylglycol dimethacrylate, (5) triethyleneglycol dimethacrylate, (6) bisphenol A diglycidyl methacrylate, and mixtures thereof.
Claim 2
Dependent Claim
258 words
A dental filling material, consisting essentially of: (A) from about 50 to about 95% by weight of finely divided, inorganic filler material which is safe and effective for use in a dental filling in the human body, wherein at least 50% by weight of said filler material is at least one nitride substance having a Moh's hardness of at least 7 and is selected from the group consisting of vanadium nitride, boron nitride, aluminum nitride, silicon nitride, titanium nitride and zirconium nitride, and the balance of said filler material is one or more inorganic dental filler substances which are different from said nitride substance, having a Moh's hardness of at least 5 and are useful as a filler for dental filling materials, and (B) from about 50 to about 5% by weight of polymerizable monomer component capable of polymerizing to form a binder resin for dental filling materials, said polymerizable monomer component being selected from the group consisting of (1) monomers having the formula ##STR11## wherein R is hydrogen or methyl, X is alkylidene and Y is oxyalkylene having from 2 to 5 carbon atoms, (2) monomers having the formula ##STR12## wherein R 1 is CH 3 , CH 3 CH 2 or CH 3 CH 2 CH 2 , and R 2 is H or CH 3 , (3) monomers having the formula ##STR13## wherein R 1 is hydrogen or methyl, R 2 is alkylene and R 3 is a divalent hydrocarbon group, (4) neopentylglycol dimethacrylate, (5) triethyleneglycol dimethacrylate, (6) bisphenol A diglycidyl methacrylate, and mixtures thereof.
Claim 3
Dependent Claim
23 words
A dental filling material according to claim 1, in which said nitride substance is vanadium nitride, boron nitride, aluminum nitride or silicon nitride.
Claim 4
Dependent Claim
25 words
A dental filling material according to claim 1 or claim 2, in which said nitride substance has a particle diameter of 50 microns or less.
Claim 5
Dependent Claim
24 words
A dental filling material according to claim 1 or claim 2, in which said nitride substance has a Moh's hardness of at least 9.
Claim 6
Dependent Claim
23 words
A dental filling material according to claim 1 or claim 2, in which said nitride substance is coated with a silicon-containing keying agent.
Claim 7
Dependent Claim
25 words
A dental filling material according to claim 5, in which said silicon-containing keying agent is a silicon-containing organic compound having at least three alkoxy groups.
Claim 8
Dependent Claim
44 words
A dental filling material according to claim 5, in which said silicon-containing keying agent is a silicon-containing organic compound having three alkoxy groups and one organic group possessing, as a terminal group, a mono-olefinic hydrocarbon radical, a primary amino group or an epoxy group.
Claim 9
Dependent Claim
18 words
A dental filling material according to claim 5, in which said silicon-containing keying agent is α-methacryloxypropyltrimethoxysilane or vinyltriethoxysilane.
Claim 10
Dependent Claim
69 words
A dental filling material according to claim 1, in the form of two pastes, one paste consisting essentially of a mixture of said nitride substance, said polymerizable monomer (B) and an activator for activating polymerization of (B), and the second paste consists essentially of a mixture of said inorganic dental filler substance different from said nitride substance, said polymerizable monomer (B) and a catalyst for catalyzing polymerization of (B).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |