Method and device for producing the whitening of live teeth with pathological and normal colorations

• US 4,983,381 A
• Filed: 04/16/1987
• Issued: 01/08/1991
• Est. Priority Date: 12/30/1985
• Status: Expired due to Fees

• Current Assignee: Futura Biomedical, LLC (Tornier Incorporated)
• Original Assignee: Futura Biomedical, LLC (Tornier Incorporated)
• Inventors: Torres Zaragoza, Vicente M.
• Primary Examiner(s): GRIFFIN, RONALD
• Application Number:
  US07/039,628
• Time in Patent Office: 1,363 Days
• Field of Search: 433/216, 433/217.1, 433/229, 433/39, 433/215, 433/203.1, 424/49, 424/53
• US Class Current: 424/53
• CPC Class Codes: A61C 1/0046 Dental lasers surgical lasers A61B18/20; working by laser beam in general B23K26/00; lasers per se H01S3/00
• CPC Class Codes: A61C 19/066 Bleaching devices; Whitening agent applicators for teeth, e.g. trays or strips
• CPC Class Codes: A61K 6/20 Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
• CPC Class Codes: A61K 6/40 Primers for dental adhesives A61K6/30
• CPC Class Codes: A61K 6/887 Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Abstract

A method and a device are described for producing the whitening of live teeth with pathological and normal colorations, destined to whitening any tooth with normal color and furthermore eliminating the pathological coloration produced by aetiologies of different origin. The whitening of the teeth (6) is effected applying different chemical products to the dental enamel, covering the teeth to be treated with a metallic plate containing an absorbent material with a chemical whitening product which acts in the presence of heat and provokes the reaction of said product which will act on all sides of the dental drown, producing whitening of the teeth. The device is constituted, in essence, by a whitening device, comprised by a thermic heating unit, whether or not controlled by microprocessor, heating elements, temperature, time and alarm sensors and controls.

Claims

1. A method for whitening a live tooth or for simultaneously whitening a plurality of live teeth, said tooth or teeth containing colorants which impart to the tooth or teeth a color or colors, said tooth or teeth having enamel and enamel tubules, said tubules containing water or water vapor, said method comprising acid engraving the enamel to open the enamel tubules and extracting the water or water vapor from the tubules, covering the tooth or teeth with a metallic plate having an absorbent material containing a chemical whitening agent so that the tooth or teeth is covered by the plate with the absorbent material in contact with the tooth or teeth, said whitening agent being effective to react with and destroy the colorants when activated, heating the plate to cause the whitening agent to be heated to a temperature sufficient to activate it, and causing said absorbent material to be pressed against the tooth or teeth so as to cause the activated whitening agent to be released into the tubules and to diffuse through the tubules to the enamel-dentine junction of the tooth or teeth whereby to react with and destroy the colorants and thereby to whiten the tooth or teeth.

2. A method as claimed in claim 1 further comprising applying a cleanser or cleansers to the teeth prior to the acid engraving to clean or degrease the enamel or both.

3. A method as claimed in claim 2 wherein the whitening agent comprises H₂ O₂ and is present in an amount of from about 30-70%.

4. A method as claimed in claim 3 wherein the whitening agent further comprises a reagent, which catalyzes the reaction between the whitening agent and the colorants, and a substance or substances which help to diffuse the whitening agent through the tooth or teeth.

5. A method as claimed in claim 3 further comprising protecting the gums of a patient to be treated with the method by covering at least part of the gums with a chemical compound which is resistant to the whitening agent or separating the gums from the whitening agent with a metallic barrier or both.

6. A method as claimed in claim 5 wherein the gums are protected with a chemical compound which comprises a cyanoacrylate.

7. A method as claimed in claim 6 wherein the absorbent material has been saturated with an initial amount of the whitening agent prior to covering the tooth or teeth with the plate and wherein the method further comprises applying an additional amount of the whitening agent to the absorbent material after the initial amount of whitening agent has been released into the tubules and then causing said additional amount to be released into the tubules.

8. A method as claimed in claim 7 further comprising sealing the enamel after the whitening agent has been released into the tubules in a desired amount.

9. A method as claimed in claim 1 further comprising regulating the heating of the plate by means of a thermostat to keep the temperature of the plate constant at a temperature of between about 40°

-55°

C.

10. A method as claimed in claim 8 wherein the whitening agent is caused to be released into the tubules for a desired period of time, the method further comprising monitoring the time and the temperature of the plate by means of a visual or digital indicator.

11. A method as claimed in claim 1 further comprising subjecting the whitening agent to laser rays to catalyze the reaction between the whitening agent and the colorants.

12. An article for use in whitening teeth comprising first means for covering substantially the entire crown of each of a plurality of teeth, said first means comprising second means for containing a chemical agent for whitening the teeth and for releasing the chemical agent when the second means is pressed against the teeth, said first means being adapted for covering the teeth with the second means pressed against the teeth, said article further comprising third means for heating the first and second means whereby to heat the chemical agent to a desired temperature.

13. An article as claimed in claim 12 wherein said second means comprises a material suitable for absorbing the whitening agent and for releasing said agent when the material is pressed against the teeth.

14. An article as claimed in claim 13 wherein the first means comprises a thermocube or thermo-containing plate made at least in part of a rust-free metal.

15. An article as claimed in claim 14 wherein the third means comprises a heating unit which includes a low-frequency power transistor which acts as a thermo-electrical sensor to produce and measure the heat which is applied to the thermocube or thermo-containing plate.

16. An article as claimed in claim 15 wherein the heating unit is included in the third means.

17. An article as claimed in claim 16 wherein the third means further comprises means to monitor the use of the article to treat a patient.

18. An article as claimed in claim 17 wherein the means to monitor includes a microprocessor with a program and memory coupled to means for measuring tooth vitality and tooth color.

19. An article as claimed in claim 18 wherein the article further comprises an ultraviolet ray emitter, an ultrasound emitter and a laser ray emitter coupled to said third means.

20. An article as claimed in claim 14 wherein the first means comprises metallic sheet means positioned to block the chemical agent from contacting the gums of a patient to be treated when the first means is covering the teeth.

21. An article as claimed in claim 12 wherein the first means is adapted for covering a plurality of teeth in one or both maxillae of a person to be treated.