Patent US4936775A successfully refreshed from Google Patents.
US4936775A
Expired / Lapsed
US
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Dental adhesive system
Assignee: Dentsply Research and Development Corp
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Filing: 1988-10-27
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Granted: 1990-06-26
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Expires: 2008-10-27
Abstract
Abstract Dental cements and abrasives are provided which are polymerizable with visible light. Such adhesives may be applied in thinner films than heretofore possible and demonstrate superior physical properties. Processes employing such materials are disclosed wherein the polymerization of the adhesive is accomplished by transmitting visible light through tooth or other structures to effect the adhesion.
Inventors
- 👤 Richard J. Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:36
CPC Classifications
C; C09; C09J; C09J4/00; A; A61; A61K; A61K6/00; A61K6/70; A61K6/71; A61K6/76; A61K6/77
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
65 words
A method of bonding an article to a tooth with a visible light-activated adhesive said adhesive comprising binder resin, diluent monomer, initiator for initiating polymerization of said adhesive by exposure to visible light and at least one filler material, said method comprising curing said adhesive by irradiation with visible light, such visible light being applied through at least one of said article and said tooth.
Claim 2
Independent Claim
65 words
A method of bonding an article to a tooth with a visible light-activated adhesive said adhesive comprising binder resin, diluent monomer, initiator for initiating polymerization of said adhesive by exposure to visible light and at least one filler material, said method comprising curing said adhesive by irradiation with visible light, such visible light being applied through at least one of said article and said tooth.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said article is an artificial tooth.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said article is selected from the group consisting of crowns, veneers, caps, bridges, endodontic articles, and dental prostheses.
Claim 5
Dependent Claim
19 words
The method of claim 1 wherein at least a portion of said visible light is transmitted through said tooth.
Claim 6
Dependent Claim
10 words
The method of claim 1 wherein said article comprises porcelain.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein said article is polymeric material capable of transmitting visible light.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein said visible light comprises electromagnetic radiation with wavelengths of from about 400 nm. to 500 nm.
Claim 9
Dependent Claim
31 words
The method of claim 1 wherein the adhesive composition comprises by weight at least about 20% of an inorganic filler and said initiator comprises an alpha-diketone and an amine reducing agent.
Claim 10
Dependent Claim
57 words
The method of claim 8 wherein said binder resin comprises bis GMA reacted with aliphatic diisocyanate, said alpha-diketone is selected from the group consisting of camphoroquinone, benzil, biacetyl, 9,10-phenanthrene-quinone, and naphthoquinone, said amine is selected from the group consisting of N-alkyldialkanolamine and trialkanolamine, and said filler is selected from the group consisting of inorganic glasses and silica.
Claim 11
Dependent Claim
20 words
The method of claim 8 wherein the adhesive composition comprises from about 40% to about 70% of said inorganic filler.
Claim 12
Dependent Claim
37 words
The method of claim 1 wherein said adhesive is present in a thickness of less than about 25 microns and the average tensile strength of the cured adhesive bond is greater than about 20 Mn/m 2 .
References Cited (Backward Citations)
US4491453A
Cited
US4490115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-25 | 1993-12-25 | 1994-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-25 | 1997-12-25 | 1998-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-25 | 2001-12-25 | 2002-06-26 | $7700.00 | Window Closed / Lapsed |