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US5232367A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for sterilizing and closing accessory canals of a tooth

Assignee: AMERICAN DENTAL TECHNOLOGIES Inc
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Filing: 1992-02-12
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Granted: 1993-08-03
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Expires: 2012-02-12
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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 incising of the frenum, opurculum, anesthesia of the tooth, etching enamel for restorations or orthodontic appliance fixation, the welding of fixed prosthesis, removal of bacterial flora periodontal pockets, removal and/or vaporization of healthy or necrotic pulp, the vertical and/or horizontal condensation of gutta percha or any other root canal sealant, the cauterization of blood vessels in the oral cavity, vaporizing bone tissue, removing tartar, apical fusion of foramina, enlarging and shaping root canal, removing carbon from surface of teeth, removal of enamel, bleaching teeth, etching dentin, separating orthodontic brackets, merging hydroxyapatite to bone and enamel, amalgam removal and undercutting of carious and/or healthy dentin and/or cementum. 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 one tenth 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 2026-11-10 02:22
CPC Classifications
A; A61; A61C; A61C1/00; A61C1/0046; A61B; A61B18/00; A61B18/18; A61B18/20; A61C19/00; A61C19/06; A61C19/063; A61C19/066; A61B2018/00636; A61B2018/2015; A61B2018/2025

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 135 words
A method for sterilizing or reducing bacteria in accessory canals and closing the same in a tooth in a mouth, comprising the steps of: aiming a pulsed laser so that the output from the laser impinges upon the accessory canals in a tooth so that sterilization or reduction in bacteria takes place, aiming a pulsed laser so that the output from the laser impinges upon the necessary canals thereby closing said canals so that additional bacteria cannot enter or escape, wherein said laser has an energy output per pulse sufficient to cause sterilization or reduce bacteria in said accessory canals and closing the same, wherein said laser has an energy output per pulse sufficient to cause hemostasis, wherein said laser has an energy output of between 0.1 millijoules per pulse and 5 joules per pulse.
Claim 2
Independent Claim 135 words
A method for sterilizing or reducing bacteria in accessory canals and closing the same in a tooth in a mouth, comprising the steps of: aiming a pulsed laser so that the output from the laser impinges upon the accessory canals in a tooth so that sterilization or reduction in bacteria takes place, aiming a pulsed laser so that the output from the laser impinges upon the necessary canals thereby closing said canals so that additional bacteria cannot enter or escape, wherein said laser has an energy output per pulse sufficient to cause sterilization or reduce bacteria in said accessory canals and closing the same, wherein said laser has an energy output per pulse sufficient to cause hemostasis, wherein said laser has an energy output of between 0.1 millijoules per pulse and 5 joules per pulse.
Claim 3
Dependent Claim 21 words
The invention as defined in claim 1 wherein the average power of said laser is between one tenth and fifty watts.
Claim 4
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 5
Dependent Claim 15 words
The invention as defined in claim 1 wherein said pulsed laser is a Nd:YAG laser.
Claim 6
Dependent Claim 15 words
The invention as defined in claim 1 wherein said laser is a Holmium doped laser.
Claim 7
Dependent Claim 15 words
The invention as defined in claim 1 wherein said laser is an Erbium doped laser.

References Cited (Backward Citations)

FR2597745A1 Cited
US4951663A Cited
US5020995A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1996-08-02 1997-02-01 1997-08-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-08-02 2001-02-01 2001-08-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-08-02 2005-02-01 2005-08-03 $7700.00 Window Closed / Lapsed

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