Patent US4645456A successfully refreshed from Google Patents.
US4645456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive compositions for tooth enamel
Assignee: Lee Pharmaceuticals Inc
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Filing: 1985-08-26
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Granted: 1987-02-24
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Expires: 2005-08-26
Abstract
Abstract The novel system for the bonding of dental filling composites and orthodontic adhesives to tooth enamel wherein the enamel is treated with a 2.5%-15% aqueous solution of a strong mineral acid or organic acid. The enamel is rinsed with water and thoroughly dried. A curable hydrophilic monomer primer is placed upon the enamel, said enamel primer being selected from the group consisting of esters having the generic formula: ##STR1## wherein R is H or CH 3 and n is 1-8; esters of the general formula: ##STR2## wherein R=H or CH 3 and n is 2-8; the mono and dimethacrylates or acrylates of glycerol; and acrylic or methacrylic acid. A methacrylate or acrylate based orthodontic adhesive or dental composite is cured on the surface of the primed enamel to give a material strongly bonded to the enamel surface.
Inventors
- 👤 Jack L. James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:42
CPC Classifications
A; A61; A61K; A61K6/00; A61K6/40; A61K6/70; A61K6/71; A61K6/76
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A method of bonding methacrylate and acrylate based dental adhesives and restoratives to tooth enamel which comprises first cleansing the enamel with an about 2-15% by weight aqueous solution of a strong inorganic or organic acid; followed by rinsing, drying, and application to the tooth enamel of a curable hydrophilic monomer primer consisting essentially of a member selected from the group consisting of: ##STR7## where R=H or CH 3 n=1-8; monomers of the formula: ##STR8## where R=H or CH 3 n=2-8; the mono and di methacrylates or acrylates of glycerol; and acrylic or methacrylic acid.
Claim 2
Independent Claim
95 words
A method of bonding methacrylate and acrylate based dental adhesives and restoratives to tooth enamel which comprises first cleansing the enamel with an about 2-15% by weight aqueous solution of a strong inorganic or organic acid; followed by rinsing, drying, and application to the tooth enamel of a curable hydrophilic monomer primer consisting essentially of a member selected from the group consisting of: ##STR7## where R=H or CH 3 n=1-8; monomers of the formula: ##STR8## where R=H or CH 3 n=2-8; the mono and di methacrylates or acrylates of glycerol; and acrylic or methacrylic acid.
Claim 3
Dependent Claim
31 words
The method of claim 1 wherein the strong inorganic or organic acid has a pKa of less than 3 and it is applied for a period of 10 to 30 seconds.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein a polymerizable methacrylate or acrylate based dental adhesive or composite is subsequently cured in place on the primed enamel to give a highly bonded material.
Claim 5
Dependent Claim
12 words
The method of claim 1 whereby the acid used is orthophosphoric acid.
Claim 6
Dependent Claim
16 words
The method of claim 1 whereby the acidic solution is 5% by weight aqueous orthophosphoric acid.
Claim 7
Dependent Claim
17 words
The method of claim 1 whereby the monomer enamel primer applied to the tooth enamel is 2-hydroxyethylmethacrylate.
Claim 8
Dependent Claim
17 words
The method of claim 1 whereby the monomer enamel primer applied to the tooth enamel is 3-hydroxypropylmethacrylate.
Claim 9
Dependent Claim
25 words
The method of claim 1 whereby the monomer enamel primer applied to the tooth enamel is 2-hydroxy ethylmethacrylate or 3-hydroxypropyl methacrylate containing a tertiary amine.
Claim 10
Dependent Claim
29 words
The method of claim 1 whereby the monomer enamel primer applied to the tooth enamel is 2-hydroxy ethylmethacrylate or 3-hydroxypropyl methacrylate containing a peroxide useful as a polymerization initiator.
Claim 11
Dependent Claim
43 words
The method of claim 1 whereby the monomer enamel primer is 2-hydroxy ethyl methacrylate or 3-hydroxy propyl methacrylate containing a tertiary amine which is mixed with the same monomer containing a peroxide and brushed onto the acid treated tooth enamel prior to polymerization.
Claim 12
Dependent Claim
19 words
The method of claim 1 wherein the monomer enamel primer is a mono or dimethacrylate or acrylate of glycerol.
Claim 13
Dependent Claim
15 words
The method of claim 1 wherein the monomer enamel primer is acrylic or methacrylic acid.
References Cited (Backward Citations)
US4380432A
Cited
US4525493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |