PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 15005233

Discrimination between composite resin and teeth using fluorescence properties.

Kazutoshi Tani·Fumio Watari·Motohiro Uo·Manabu Morita
View original source ↗Export metadata ↓

Abstract

The differentiation of composite resin from teeth using fluorescence emission was investigated as basic research for the visual detection of resin filled teeth in mass dental health examinations. Fluorescence spectra were taken from extracted human maxillary central incisors and 12 types of light-cured composite resins with a maximum of 15 shades via excitation using light with wavelengths of 400-500 nm. The fluorescence intensity ratio of resin to tooth was lowest around 500 nm for all the resins. The fluorescent images were taken based on spectroscopic results, which confirmed discrimination between the resin part and the tooth in the resin filled tooth.

Explore related subjects

ColorComposite ResinsDental Health SurveysDental Restoration, PermanentFluorescenceHumansLightSpectrometry, FluorescenceToothEvaluation StudyJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Kazutoshi Tani, Fumio Watari, Motohiro Uo, Manabu Morita. 2003. Discrimination between composite resin and teeth using fluorescence properties.. https://doi.org/10.4012/dmj.22.569

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2007

Multicolor single-molecule spectroscopy with alternating laser excitation for the investigation of interactions and dynamics.

We have developed confocal multicolor single-molecule spectroscopy with optimized detection sensitivity on three spectrally distinct channels for the study of biomolecular interactions and FRET between more than two molecules. Using programmable acousto-optical devices as beamsplitter and excitation filter, we overcome some of the limitations of conventional multichroic beamsplitters and implement rapid alternation between three laser lines. This enables to visualize the synthesis of DNA three-way junctions on a single-molecule basis and to resolve seven stoichiometric subpopulations as well as to quantify FRET in the presence of competing energy transfer pathways. Furthermore, the ability to study correlated molecular movements by monitoring several distances within a biomolecular complex simultaneously is demonstrated.

Color↗
PubMed2007

Color naming reflects optimal partitions of color space.

The nature of color categories in the world's languages is contested. One major view holds that color categories are organized around universal focal colors, whereas an opposing view holds instead that categories are defined at their boundaries by linguistic convention. Both of these standardly opposed views are challenged by existing data. Here, we argue for a third view based on a proposal by Jameson and D'Andrade [Jameson KA, D'Andrade RG (1997) in Color Categories in Thought and Language, eds Hardin CL, Maffi L (Cambridge Univ Press, Cambridge, U.K.), pp 295-319]: that color naming across languages reflects optimal or near-optimal divisions of an irregularly shaped perceptual color space. We formalize this idea, test it against color-naming data from a broad range of languages and show that it accounts for universal tendencies in color naming while also accommodating some observed cross-language variation.

Color↗