Method for cleaning the oral cavity

• US 8,186,997 B2
• Filed: 06/29/2010
• Issued: 05/29/2012
• Est. Priority Date: 06/29/2010
• Status: Active Grant

• Current Assignee: Johnson & Johnson Consumer Inc. (Johnson & Johnson)
• Original Assignee: McNeil-PPC Incorporated (Johnson & Johnson)
• Inventors: Binner, Curt, Reddy, Megha
• Primary Examiner(s): Farah, Ahmed
• Application Number:
  US12/825,920
• Publication Number:
  US 20110318713A1
• Time in Patent Office: 700 Days
• Field of Search: 607 88- 93, 128/898, 433/25, 433/27, 433/29, 433/80, 433/119, 433/125, 433/142, 433/144, 433/116, 433/216
• US Class Current: 433/29
• CPC Class Codes: A61B 5/0071 by measuring fluorescence emission
• CPC Class Codes: A61B 5/0088 for oral or dental tissue
• CPC Class Codes: A61C 17/221 Control arrangements therefor
• CPC Class Codes: A61C 17/225 Handles or details thereof

Abstract

A method of cleaning an oral cavity, the method including positioning a device suitable for detecting and removing plaque from a surface of the oral cavity within the oral cavity, cleaning and irradiating the surface of a tooth in the oral cavity, the tooth having applied thereto a fluorescent agent, with incident radiation of a wavelength effective to provide a fluorescent emission when contacted with the fluorescent agent on the tooth, collecting at least a portion of the fluorescent emission over a first time period, determining a first average fluorescent emission value (APV1), collecting at least a portion of the fluorescent emission over a second time period, determining a second average plaque value (APV2); and comparing the APV1 to the APV2.

Claims

1. A method for cleaning an oral cavity, said method comprising:

a. positioning within a section of said oral cavity a device suitable for detecting and removing plaque from a surface of at least one tooth in said oral cavity,

b. substantially simultaneously cleaning and irradiating said surface of at least one tooth in said oral cavity, said at least one tooth having applied thereto a fluorescent agent capable of binding to plaque on said surface of said at least one tooth, with incident radiation of a wavelength effective to provide a fluorescent emission when contacted with said fluorescent agent on said surface of said at least one tooth,

c. collecting at least a portion of said fluorescent emission over a first time period,

d. determining a first average plaque value (APV1) based on said fluorescent emission collected over said first time period,

e. collecting at least a portion of said fluorescent emission over a second time period,

f. determining a second average plaque value (APV2) based on said fluorescent emission collected over said second time period; and

g. comparing said APV1 to said APV2,

wherein reflected light resulting from contact of said incident radiation with said surface is collected essentially simultaneously with said fluorescent emission and said APV1 and APV2 to determine average compensated plague value (ACPV) for said APV1 and APV2.

2. The method of claim 1 wherein, if said APV2 is less than said APV1, said device is positioned within another section of said oral cavity.

3. The method of claim 1 wherein, if said APV1 is greater than or equal to said APV2, said surface in said section is continuously substantially simultaneously cleaned and irradiated for a predetermined maximum time period.

4. The method of claim 3 wherein said predetermined maximum time period is from about 0.5 to about 15 seconds.

5. The method of claim 1 wherein said fluorescent agent comprises fluorescein or a salt thereof.

6. The method of claim 5 wherein said incident radiation has a peak wavelength of from about 450 to about 500 nanometers.

7. The method of claim 5 wherein said portion of said fluorescent emission has a peak wavelength of from about 520 to about 530 nanometers.

8. The method of claim 1 wherein said first time period is from about 0.01 to about 10 seconds.

9. The method of claim 1 wherein said second time period is from about 0.001 to about 15 seconds.

10. The method of claim 1 wherein said reflected light is simultaneously conveyed with said fluorescent emission through an optical filter prior to conversion of an optical signal of said fluorescent emission to an electrical signal of said fluorescent emission, said filter removing light having a wavelength of above about 515 nanometers.

11. The method of claim 1 wherein said compensated APV1 and APV2 are determined as a function of the distance between the point of collection of said fluorescent emission and said surface of said oral cavity.

12. The method of claim 11 wherein said cleaning is effected by sonification, pressurized water and brushing.

13. The method of claim 12 wherein said brushing is effected by a power toothbrush or a manual toothbrush.

14. The method of claim 1 wherein said cleaning is effected by sonification, pressurized water and brushing.

15. The method of claim 14 wherein said brushing is effected by a power toothbrush or a manual toothbrush.