Method and apparatus for detecting the presence of caries in teeth using visible light
US4479499A · kind A · utility
271Cited by
1References
2Claims
0Family size
Inventor
Key dates
| Filing date | Jan 29, 1982 |
| Grant date | Oct 30, 1984 |
| Priority date | — |
| Expiry date | Jan 29, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/6484
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for detecting the presence of caries in human teeth using visible light. The tooth is exposed to light of relatively narrow bandwidths. The light from the tooth is preferably examined by two photomultipliers or visually each examining a different wavelength. Caries are detected when the difference in the intensity of the light from the tooth at those two wavelengths changes in a predetermined manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.