US4952143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental bleaching instrument
Assignee: KNETIC INSTRUMENTS Inc
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Filing: 1988-05-17
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Granted: 1990-08-28
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Expires: 2008-05-17
Abstract
Abstract A dental bleaching instrument with a source for generating heat. A temperature sensor can be distanced from the heat generator for determining the heat proximal to the teeth. That more accurately reflects the temperature of the heat actually reaching the tooth surface. The light used for bleaching the teeth provides, originally, IR, optically visible light and UV wavelengths. All UV and optically visible light is filtered except for a narrow band of optically visible light to facilitate aiming. Also, the heat source of the device is physically separable from the power and control mechanism yet electrically connected thereto, to facilitate alignment and location of the light with respect to the patient.
Inventors
- 👤 William J. Becker
- 👤 Kenneth S. Magid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:13
CPC Classifications
A; A61; A61C; A61C19/00; A61C19/06; A61C19/063; A61C19/066
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
A dental bleaching instrument comprising (a) a heat generating means capable of directing heat onto at least one tooth surface for activating bleaching means thereto; (b) electrical power means for controlling the temperature of said heat generating means; and (c) temperature sensing means electrically connected to said electrical power means; said temperature sensing means including means for positioning proximal to the tooth to be bleached and yet distanced from said heat generating means for sensing the temperature of the heat generated by said heat generating means substantially close to the tooth surface after said heat has passed from said heat generating means to said tooth surface and for providing a signal means responsive to said sensed temperature.
Claim 2
Dependent Claim
117 words
A dental bleaching instrument comprising (a) a heat generating means capable of directing heat onto at least one tooth surface for activating bleaching means thereto; (b) electrical power means for controlling the temperature of said heat generating means; and (c) temperature sensing means electrically connected to said electrical power means; said temperature sensing means including means for positioning proximal to the tooth to be bleached and yet distanced from said heat generating means for sensing the temperature of the heat generated by said heat generating means substantially close to the tooth surface after said heat has passed from said heat generating means to said tooth surface and for providing a signal means responsive to said sensed temperature.
Claim 3
Dependent Claim
34 words
A dental bleaching instrument as claimed in claim 1 wherein said signal means further comprises a temperature display means for indicating said sensed actual temperature of the heat generated by said heat generating means.
Claim 4
Dependent Claim
53 words
A dental bleaching instrument as claimed in claim 1 comprising an electrical feedback circuit means connected to said temperature sensing means and said electrical power means for adjusting said electrical power means so that the sensed temperature of the heat generated by said heat generating means is about equal to a preselected temperature.
Claim 5
Dependent Claim
35 words
A dental bleaching instrument as claimed in claim 1 wherein said temperature sensing means comprises a thermocouple embedded in a material mass of about the same or mathematically analogous thermal properties as ordinary tooth structure.
Claim 6
Dependent Claim
78 words
A dental bleaching instrument comprising (a) a wavelength generating means capable of generating a complete spectrum of wavelengths including IR UV and optically visible wavelengths, onto at least one tooth surface, (b) electrical power means for controlling the temperature of heat of said IR portion of said wavelength generating means; and (c) filtering means for substantially filtering the UV and all but a narrow range of optically visible wavelengths from reaching the environment immediately surrounding said tooth surface.
Claim 7
Dependent Claim
78 words
A dental bleaching instrument comprising (a) a wavelength generating means capable of generating a complete spectrum of wavelengths including IR UV and optically visible wavelengths, onto at least one tooth surface, (b) electrical power means for controlling the temperature of heat of said IR portion of said wavelength generating means; and (c) filtering means for substantially filtering the UV and all but a narrow range of optically visible wavelengths from reaching the environment immediately surrounding said tooth surface.
Claim 8
Dependent Claim
32 words
A dental bleaching instrument as claimed in claim 5, wherein the wavelength of the IR portion of said spectrum allowed to pass by said filtering means is greater than about 7500 A.
Claim 9
Dependent Claim
30 words
A dental bleaching instrument as claimed in claim 5, wherein said narrow range of optically visible light is in the range of about 6500 A-7500 A and 4500 A-5000 A.
Claim 10
Dependent Claim
116 words
A dental bleaching instrument comprising: (a) a heat generating means comprising a unit housing a heat source for providing and directing heat onto at least one tooth surface; and (b) an electrical power and controlling means for supplying power to and controlling the temperature of said heat provided by said heat generating means, said unit housing of said heat generating means being selectively physically disconnectable and removable from said electrical power and controlling means yet electrically connected thereto, said unit housing including means for selectively attaching and securing said unit housing, and to an accessory holding device and for adjustable location of said heat generating means proximal to the tooth of the patient to be treated.
Claim 11
Dependent Claim
116 words
A dental bleaching instrument comprising: (a) a heat generating means comprising a unit housing a heat source for providing and directing heat onto at least one tooth surface; and (b) an electrical power and controlling means for supplying power to and controlling the temperature of said heat provided by said heat generating means, said unit housing of said heat generating means being selectively physically disconnectable and removable from said electrical power and controlling means yet electrically connected thereto, said unit housing including means for selectively attaching and securing said unit housing, and to an accessory holding device and for adjustable location of said heat generating means proximal to the tooth of the patient to be treated.
Claim 12
Dependent Claim
31 words
A dental bleaching instrument as claimed in claim 8, wherein said heat generating means comprises a clamping means for securing the same to the overhead operatory light in a dental office.
References Cited (Backward Citations)
US4597712A
Cited
US4661070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |