US4504231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for filling teeth
Assignee: Dentsply Research and Development Corp
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Filing: 1983-04-11
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Granted: 1985-03-12
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Expires: 2003-04-11
Abstract
Abstract Process for filling dental cavities with radiation curable silaneous adhesives comprising a polymerizable resin comprising at least 20% by weight of a polymerizable silane and optionally up to about 80% by weight of a polymerizable, ethylenically unsaturated material. According to a preferred embodiment, the polymerizable silane is either an acrylosilane or a vinyl silane.
Inventors
- 👤 Francis F. Koblitz
- 👤 Jane L. Reichart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:54
CPC Classifications
C; C09; C09J; C09J4/00; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; Y; Y10; Y10S; Y10S522/00; Y10S522/908
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
170 words
A process for filling teeth comprising applying to a prepared tooth cavity a light polymerizable adhesive comprising a polymerizable resin composition comprising (a) more than about 50% by weight of at least one silane having the formula ##STR6## where R 1 -R 4 are the same or different and are H, alkyl, alkenyl, aryl, aralkyl, alkaryl, alkoxy, vinyl, aryloxy, or acyloxy having from 1 to about 30 carbon atoms and where at least one of R 1 -R 4 is alkyl, aryl, aralkyl or alkaryl having from 1 to about 30 carbon atoms and is substituted with at least one group having the formula ##STR7## where R 5 is H, alkyl or alkenyl having from 1 to about 6 carbon atoms, and (b) up to about 50% of a polymerizable ethylenically unsaturated material, and an amount of a photosensitizing system effective to cause polymerization of said adhesive when said adhesive is exposed to actinic light, and exposing said adhesive to actinic light for a time sufficient to harden said adhesive.
Claim 2
Dependent Claim
170 words
A process for filling teeth comprising applying to a prepared tooth cavity a light polymerizable adhesive comprising a polymerizable resin composition comprising (a) more than about 50% by weight of at least one silane having the formula ##STR6## where R 1 -R 4 are the same or different and are H, alkyl, alkenyl, aryl, aralkyl, alkaryl, alkoxy, vinyl, aryloxy, or acyloxy having from 1 to about 30 carbon atoms and where at least one of R 1 -R 4 is alkyl, aryl, aralkyl or alkaryl having from 1 to about 30 carbon atoms and is substituted with at least one group having the formula ##STR7## where R 5 is H, alkyl or alkenyl having from 1 to about 6 carbon atoms, and (b) up to about 50% of a polymerizable ethylenically unsaturated material, and an amount of a photosensitizing system effective to cause polymerization of said adhesive when said adhesive is exposed to actinic light, and exposing said adhesive to actinic light for a time sufficient to harden said adhesive.
Claim 3
Dependent Claim
60 words
The process of claim 1 wherein said polymerization resin composition further comprises from about 0.5% to about 10% by weight of the resin of a material having the formula ##STR8## where R 6 is alkyl, aryl, alkaryl or aralkyl having from 1 to about 30 carbon atoms and R 1 -R 3 have the same meaning defined in claim 1.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein R 1 -R 3 were alkoxy(alkoxy) groups.
Claim 5
Dependent Claim
19 words
The process of claim 1 further comprising an amount of particulate, inorganic filler sufficient to render said adhesive thixotropic.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein said photosensitizing system comprises at least on alpha diketone and an amine.
Claim 7
Dependent Claim
37 words
The process of claim 1 wherein said photosensitizing system comprises either a benzoin compound or a compound having the formula ##STR9## where R 7 and R 8 are the same or different and are alkyl or aryl.
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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |