Navigation Links
Characterization of tooth decay


Introduction
Quick and quantitative analytical evaluation of tooth decay is required in any study of the environmental factors promoting such decay. This information is essential to any study of which dental products are most effective in slowing or arresting the decay.

Teeth are naturally fluorescent solids, and are highly-scattering samples that can introduce interference that would mask fluorescence indicators. Thus, a SPEX FLUOROLOG spectrofluorometer was selected, taking advantage of double monochromators for ultra-pure spectra. Use of a FLUOROLOG allowed picosecond time-discrimination via the FLUOROLOG-Tau lifetime accessory for even more information about the samples.


Results
Fig. 1 shows a contour plot of the excitation-emission matrix of the sample. The plot results from scanning the fluorescence at various excitation wavelengths. The clean enamel surface exhibited two large fluorescence bands at 430 and 470 nm.


Fig. 2 shows a surface heavily damaged by decay. Though the 430- and 470-nm peaks were still present, their relative intensities were reversed. In addition, a new peak surfaced at 650 nm. Lifetime data from the FLUOROLOG-Tau confirmed that there was indeed a third component present at 650 nm, with a long lifetime of about 600 ns.


Conclusion
The FLUOROLOG system provides a quantitative assessment of tooth decay, via the FLUOROLOGs exclusive strong stray-light rejection, and ability to detect IR fluorescence.

The FLUOROLOG-Tau accessory provides an additional dimension of discrimination. With these data, new dental treatments and products may be assessed. Further work may lead to a quick, convenient meth od of tracing decay.


back to top
'"/>

Source:


Page: All 1 2

Related biology technology :

1. Characterization of Protein Oligosaccharides Using MSn
2. Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing
3. Isolation and Characterization of Anti-Viral Nucleoside Compounds from the Chinese Herb Taraxacum Mongolicum
4. A Robust LC/MS/MS Method for the Quantitation of Very Long Chain Fatty Acids for Research into the Characterization of Peroxisomal Disorders
5. Sciclone ALH 3000 Liquid Handler: Functional Characterization of the High Volume Head - Part 1: Plate-to-Plate Precision Testing
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:2/23/2017)... ... February 23, 2017 , ... ... a published evaluation of multiple immunoassay-based threat detection technologies by researchers from ... PathSensors’ CANARY® biosensor threat detection technology was found to have the best ...
(Date:2/23/2017)... , ... February 23, 2017 , ... The Greater ... a new partnership with Compass Research . GGI's mission is to advance global ... to a child in need in honor of each clinical trial volunteer. The vision ...
(Date:2/23/2017)... DIEGO and SAN FRANCISCO ... a privately-held regenerative medicine company, and Beyond Type 1, ... with type 1 diabetes, today announced a grant from ... a functional cure for type 1 and other insulin-requiring ... ViaCyte has been developing innovative stem cell-derived cell replacement ...
(Date:2/22/2017)... ... February 22, 2017 , ... Kernel , ... Research Systems, LLC (KRS) clinical development program. KRS is a neurotechnology spin-out ... research and clinical applications. The terms of the transaction were not disclosed. ...
Breaking Biology Technology:
(Date:2/10/2017)... 2017 Research and Markets has ... Medicine - Scientific and Commercial Aspects" to their offering. ... ... integrated with therapy for selection of treatment as well for ... prevention of disease in modern medicine. Biochip/microarray technologies and next ...
(Date:2/8/2017)... , Feb. 7, 2017 Report Highlights ... The global synthetic-biology ... $11.4 billion by 2021, growing at a compound annual growth ... An overview of the global markets for synthetic biology. - ... for 2016, and projections of compound annual growth rates (CAGRs) ...
(Date:2/7/2017)... 2017 Zimmer Biomet Holdings, Inc. (NYSE and ... present at the LEERINK Partners 6th Annual Global Healthcare ... Wednesday, February 15, 2017 at 10 a.m. Eastern Time. ... can be accessed at http://wsw.com/webcast/leerink28/zbh .  The webcast ... Zimmer Biomet,s Investor Relations website at http://investor.zimmerbiomet.com . ...
Breaking Biology News(10 mins):