US4874315A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for bonding of restorative materials to a tooth
Assignee: University of Rochester
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Filing: 1987-02-19
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Granted: 1989-10-17
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Expires: 2007-02-19
Abstract
Abstract A method for bonding of restorative materials, such as composite resins, to the surface of a tooth wherein the surface of the tooth is pretreated with a carbon dioxide laser of low energy density without damaging surrounding tissues or the underlying pulp of the tooth.
Inventors
- 👤 John D. B. Featherstone
- 👤 Lyndon F. Cooper
- 👤 Michael L. Myers
- 👤 Dennis G. A. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:18
CPC Classifications
A; A61; A61C; A61C5/00; A61N; A61N5/00; A61N5/06; A61N5/067; A61B; A61B17/00; A61B2017/00017; A61B2017/00137; A61B2017/00154
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
78 words
A method for treating a tooth with a restorative material comprising the steps of pretreating at least a portion of the surface area of the dentin or cementum of said tooth with light from a laser, which is of a wave length between 9.0 and 11.0 micrometers for a duration sufficient to apply about 5 J of laser energy to said dentin or cementum, and then applying a restoring material to the pretreated surface area of said tooth.
Claim 2
Independent Claim
78 words
A method for treating a tooth with a restorative material comprising the steps of pretreating at least a portion of the surface area of the dentin or cementum of said tooth with light from a laser, which is of a wave length between 9.0 and 11.0 micrometers for a duration sufficient to apply about 5 J of laser energy to said dentin or cementum, and then applying a restoring material to the pretreated surface area of said tooth.
Claim 3
Dependent Claim
14 words
The method as set forth in claim 1 wherein the surface area is dentin.
Claim 4
Dependent Claim
13 words
The method as set forth in claim 1 wherein the surface is cementum.
Claim 5
Dependent Claim
39 words
The method as set forth in claim 1 wherein said laser is pulsed to produce pulses of light of sufficiently short duration and for a sufficiently long period of time to provide said laser energy of about 5 J.
Claim 6
Dependent Claim
18 words
The method as set forth in claim 4 wherein the duration of each pulse is between 100-200 ns.
Claim 7
Dependent Claim
40 words
The method as set forth in claim 1 wherein said laser energy is applied in pulses of light, the peak energy density of which is sufficiently low to avoid irreversible damage to the tooth's surrounding oral tissue or to pulp.
Claim 8
Dependent Claim
17 words
The method as set forth in claim 1 wherein the wavelength is between 9.32 and 10.59 μm.
Claim 9
Dependent Claim
20 words
The method as set forth in claim 4 wherein the pulse energy-density is between 10-50 J per cm 2 .
Claim 10
Dependent Claim
31 words
The method according to claim 1 wherein said step of applying a restorative material comprises applying a plurality of layers of said material to said surface sufficient to form a bond.
Claim 11
Dependent Claim
26 words
The method according to claim 9 wherein said restorative material (comprises) is selected from the group consisting of polymers, ionomer cements, alloys, ceramics and composite resins.
Claim 12
Dependent Claim
15 words
The method according to claim 9 wherein said composite resin is a microfill Bis-GMA resin.
Claim 13
Independent Claim
82 words
A method for treating a tooth with a restorative material comprising the steps of pretreating dentin or cementum with a level of laser energy which is sufficiently low so that fusion, melting and recrystalization of the dentin or cementum is confined to a thin, approximately 5 micrometer thick region extending into the dentin or cementum below the surface thereof said laser energy having a wavelength between 9.0 and 11.0 micrometers, and then applying a restorative material to the pretreated dentin or cementum.
Claim 14
Independent Claim
82 words
A method for treating a tooth with a restorative material comprising the steps of pretreating dentin or cementum with a level of laser energy which is sufficiently low so that fusion, melting and recrystalization of the dentin or cementum is confined to a thin, approximately 5 micrometer thick region extending into the dentin or cementum below the surface thereof said laser energy having a wavelength between 9.0 and 11.0 micrometers, and then applying a restorative material to the pretreated dentin or cementum.
Claim 15
Dependent Claim
14 words
The method according to claim 1 wherein said laser is a carbon dioxide laser.
Claim 16
Dependent Claim
14 words
The method according to claim 12 wherein said laser is a carbon dioxide laser.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |