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San Francisco Dentist | San Francisco dental care | CA | DIAGNOdent Laser Cavity Detection

Lily H. Siu, D.M.D., Professional Corporation

Specialist in Prosthodontics

 telephone: (415) 566-3833     fax: (415) 566-2909

DIAGNOdent Laser Cavity Detection


Benefits to patients


  • For the first time, allows the quantification of caries activity over time with a precise and reliable measurement.


  • Is conservative by avoiding "exploratory" excavation of suspect teeth.


  • Extremely accurate diagnostic aid. Proven to be over 90% accurate.


  • Early detection of pathological changes that are undiagnosed by conventional examination methods (e.g. initial lesions, demineralization and changes in the enamel, fissure caries).


  • No scratching probe: simple, fast and painless examination.


  • No x-ray exposure. Practice building, revenue enhancing.


  • High level of patient acceptance and satisfaction.

What is DIAGNOdent and how does it work?

  • DIAGNOdent uses laser technology to detect and quantify hidden or sub-surface caries by measuring laser fluorescence within the tooth structure.


  • The device operates at a wavelength of 655 nm. At this specific wavelength, clean healthy tooth structure exhibits little or no fluorescence, resulting in very low scale readings on the display.
  • Altered tooth substances and bacteria, including caries, will fluoresce.


  • The DIAGNOdent will react with elevated scale readings on the display.


  • An audio tone allows the operator to hear changes in the scale values. This enables the user to focus on the patient — not solely on the device.


  • The DIAGNOdent is an extremely accurate, reliable and non-invasive method to aid in caries detection. The device has been successfully used by more than 20,000 dental professionals in the United States and is integrated into the curriculum by a growing number of dental schools.