Granted Patent B2

US 8,187,002 · App. 12/825,885 · Granted May 29, 2012

Abstract

Claims (22)

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

a. positioning within said oral cavity a device suitable for detecting and removing plaque from a surface of at least one tooth of said oral cavity, said device comprising a source for emitting light,

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 at least one tooth, with said light of a wavelength effective to provide a fluorescent emission when contacted with said fluorescent agent on said at least one tooth,

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

d. determining an average plaque value (APV) based on said fluorescent emission collected over said predetermined first time period,

e. comparing said APV to a predetermined plaque value (PPV),

f. continuing to substantially simultaneously clean and irradiate said at least one tooth for a predetermined second time period,

wherein reflected light resulting from contact of said light with said surface is collected essentially simultaneously with said fluorescent emission and said average plague value is a compensated average plague value.

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

3. The method of claim 2 wherein said incident radiation has a peak wavelength of from about 450 to about 500 nanometers.

4. The method of claim 3 wherein said portion of said fluorescent emission has a peak wavelength of from about 520 to about 530 nanometers.

5. The method of claim 4 wherein said portion of said reflected light is simultaneously conveyed with said portion of said fluorescent emission through an optical filter prior to conversion of said optical signal of said fluorescent emission to said electrical signal of said fluorescent emission, said filter removing light having a wavelength of above about 515 nanometers.

6. The method of claim 1 wherein said predetermined first time period is from about 0.25 to about 10 seconds.

7. The method of claim 1 wherein said predetermined second time period is from about 0.5 to about 45 seconds.

8. The method of claim 1 wherein said compensated average plaque value is determined as a function of the distance between the point of collection of said fluorescent emission and said surface of said oral cavity.

9. The method of claim 1 further comprising determining a distance range of said light source from said surface over said predetermined second time period and comparing said distance range to a predetermined distance threshold.

10. The method of claim 1 further comprising continuing to simultaneously clean and irradiate said surface of said oral cavity until all of a plurality of sections of said oral cavity have been cleaned, or for a predetermined maximum time period, whichever occurs first.

11. The method of claim 10 wherein said predetermined maximum time period is from about 60 to about 180 seconds.

12. The method of claim 10 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 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.

Assignments (8)