EP0160481A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Orthodontic bracket consisting of monocrystalline alpha-alumina
Assignee: Johnson and Johnson Dental Products Co
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Filing: 1985-04-22
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Granted: —
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Expires: 2005-04-22
Abstract
Abstract The adhesion of crystalline alumina to adhesives is enhanced by coating the surface of the alumina that is to be in contact with the adhesive, with a very thin coating of a silicone material such as sputter coated silica.
Inventors
- 👤 Robert David De Luca
- 👤 Robin Mackay Forbes Jones
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 20:04
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/45; C04B41/50; C04B41/5025; A; A61; A61C; A61C7/00; A61C7/12; A61C7/14; C04B41/80; C04B41/81; C04B41/85; C04B41/87
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
42 words
A composite comprising a crystalline alumina article adhesively bonded to a substrate, wherein at least a portion of the surface of said article that is adhesively bonded to said substrate comprises crystalline alumina having a thin adherent coating of a siliceous material.
Claim 2
Dependent Claim
42 words
A composite comprising a crystalline alumina article adhesively bonded to a substrate, wherein at least a portion of the surface of said article that is adhesively bonded to said substrate comprises crystalline alumina having a thin adherent coating of a siliceous material.
Claim 3
Dependent Claim
32 words
The composite of claim 1 wherein the adhesive bond between said coating of a siliceous material and the adhesive bonding said article to said substrate is enhanced by a silane coupling agent.
Claim 4
Dependent Claim
21 words
The composite of claim 2 wherein the adhesive is an acrylic material and wherein the silane coupling agent contains ethylenic unsaturation.
Claim 5
Dependent Claim
21 words
The composite of claim 2 wherein the adhesive is an epoxy resin and the silane coupling agent contains an amino group.
Claim 6
Dependent Claim
17 words
The composite of any one of claims 1 to 4 wherein said crystalline alumina is crystalline alpha-alumina.
Claim 7
Dependent Claim
16 words
The composite of any one of claims 1 to 5 wherein said siliceous material is silica.
Claim 8
Dependent Claim
17 words
The composite of any one of claims 1 to 6 wherein said article comprises an orthodontic bracket.
Claim 9
Independent Claim
65 words
A method of producing a composite which comprises the steps of coating at least a portion of the surface of a crystalline alumina article with a thin adherent coating of a siliceous material, and then bonding said article to a substrate by adhesively bonding said surface having the siliceous coating to the substrate using an adhesive that has an adhesive affinity for said siliceous coating.
Claim 10
Independent Claim
65 words
A method of producing a composite which comprises the steps of coating at least a portion of the surface of a crystalline alumina article with a thin adherent coating of a siliceous material, and then bonding said article to a substrate by adhesively bonding said surface having the siliceous coating to the substrate using an adhesive that has an adhesive affinity for said siliceous coating.
Claim 11
Dependent Claim
26 words
The method of claim 8 wherein the adhesive bond between said adhesive and said siliceous coating is enhanced by the use of a silane coupling agent.
Claim 12
Dependent Claim
20 words
The method of claim 9 wherein the adhesive is an acrylic material and the silane coupling agent contains ethylenic unsaturation.
Claim 13
Dependent Claim
21 words
The method of claim 9, wherein the adhesive is an epoxy resin and the silane coupling agent contains an amino group.
Claim 14
Independent Claim
16 words
The method of any one of claims 8 to 11 wherein said siliceous material is silica.
Claim 15
Independent Claim
17 words
The method of any one of claims 8 to 12 wherein the crystalline alumina is crystalline alpha-alumina.
Claim 16
Independent Claim
17 words
The method of any one of claims 8 to 13 wherein the article comprises an orthodontic bracket.
Claim 17
Dependent Claim
13 words
The composite of claim 7 for application to the teeth of a patient.
References Cited (Backward Citations)
No citation records indexed.
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