Patent US4940411A successfully refreshed from Google Patents.
US4940411A
Expired / Lapsed
US
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Dental laser method
Assignee: AMERICAN DENTAL TECHNOLOGIES Inc
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Filing: 1989-04-24
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Granted: 1990-07-10
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Expires: 2009-04-24
Abstract
Abstract A dental laser assembly is disclosed for use in eradicating carious lesions in teeth, the treatment of sensitive teeth, as well as the removal of soft tissue. The laser assembly includes a housing having a cavity in which a pulsed laser is contained. The laser is excited so that the laser emits a laser beam along a predetermined axis that is in line with a fiber optic delivery system and at a pulse rate of one to 10,000 pulses per second and an average power variable from zero to 50 watts. A handpiece is dimensioned to be inserted into a human mouth while an optical fiber optically connects the laser output to the handpiece. The laser assembly also includes a continuous output aiming laser which, upon activation, provides a continuous laser aiming beam coaxial to the treatment beam. Both beams are then introduced into a fiber optic delivery system.
Inventors
- 👤 Arthur Vassiliadis
- 👤 Joseph W. Shaffer
- 👤 David J. Fullmer
- 👤 Michael H. Brewer
- 👤 David R. Hennings
- 👤 Terry D. Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:54
CPC Classifications
A; A61; A61C; A61C5/00; A61C1/00; A61C1/0046; A61B; A61B17/00; A61B17/24; A61B18/00; A61B18/18; A61B18/20; A61N; A61N5/00; A61N5/06; A61N5/0601; A61N5/0603; A61B2018/00636; A61B2018/2015; A61B2018/2025; A61N2005/0606
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A method for performing a root canal procedure on a tooth, said tooth having a pulp chamber, comprising the steps of: opening a hole in said tooth to said pulp chamber, aiming a pulsed laser so that the output from the laser impinges upon pulp contained within the pulp chamber, repeatedly activating the laser until the pulp in the pulp chamber is eradicated, wherein said laser has an energy output per pulse sufficient to both eradicate pulp contained in the pulp chamber and to sterilize the pulp chamber.
Claim 2
Independent Claim
88 words
A method for performing a root canal procedure on a tooth, said tooth having a pulp chamber, comprising the steps of: opening a hole in said tooth to said pulp chamber, aiming a pulsed laser so that the output from the laser impinges upon pulp contained within the pulp chamber, repeatedly activating the laser until the pulp in the pulp chamber is eradicated, wherein said laser has an energy output per pulse sufficient to both eradicate pulp contained in the pulp chamber and to sterilize the pulp chamber.
Claim 3
Dependent Claim
25 words
The invention as defined in claim 1 wherein said laser has an energy output of between 0.1 millijoules per pulse and 5 joules per pulse.
Claim 4
Dependent Claim
20 words
The invention as defined in claim 1 wherein the average power of said laser is between one and fifty watts.
Claim 5
Dependent Claim
23 words
The invention as defined in claim 1 wherein the laser has a pulse repetition rate of between one and 10,000 pulses per second.
Claim 6
Independent Claim
96 words
A method for performing an apicoectomy procedure on a tooth, said tooth having a pulp chamber, comprising the steps of: opening a hole in said tooth to said pulp chamber, aiming a pulsed laser so that the output from the laser passes through an apic contained at a bottom of the pulp chamber, repeatedly activating the laser until the apic is eradicated, wherein said laser has an energy output per pulse sufficient to both eradicate diseased tissue beneath the apic at the base of the pulp chamber and to sterilize the area surrounding the diseased tissue.
Claim 7
Independent Claim
96 words
A method for performing an apicoectomy procedure on a tooth, said tooth having a pulp chamber, comprising the steps of: opening a hole in said tooth to said pulp chamber, aiming a pulsed laser so that the output from the laser passes through an apic contained at a bottom of the pulp chamber, repeatedly activating the laser until the apic is eradicated, wherein said laser has an energy output per pulse sufficient to both eradicate diseased tissue beneath the apic at the base of the pulp chamber and to sterilize the area surrounding the diseased tissue.
Claim 8
Dependent Claim
25 words
The invention as defined in claim 5 wherein said laser has an energy output of between 0.1 millijoules per pulse and 5 joules per pulse.
Claim 9
Dependent Claim
20 words
The invention as defined in claim 5 wherein the average power of said laser is between one and fifty watts.
Claim 10
Dependent Claim
23 words
The invention as defined in claim 5 wherein the laser has a pulse repetition rate of between one and 10,000 pulses per second.
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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) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |