Dental demineralization detection, methods and systems
US9901256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2013 |
| Grant date | Feb 27, 2018 |
| Priority date | — |
| Expiry date | Nov 17, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/6493
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems for detecting early stage dental caries and decays are provided. In particular, in an embodiment, laser-induced autofluorescence (AF) from multiple excitation wavelengths is obtained and analyzed. Endogenous fluorophores residing in the enamel naturally fluoresce when illuminated by wavelengths ranging from ultraviolet into the visible spectrum. The relative intensities of the AF emission changes between different excitation wavelengths when the enamel changes from healthy to demineralized. By taking a ratio of AF emission spectra integrals between different excitation wavelengths, a standard is created wherein changes in AF ratios within a tooth are quantified and serve as indicators of early stage enamel demineralization. The techniques described herein may be used in conjunction with a scanning fiber endoscope (SFE) to provide a reliable, safe and low-cost means for identifying dental caries or decays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.