Luminescence of selected dental composites in vitro

Mazur-Koczorowska, Anna; Sikorska, Ewa; Krawczyk, Alina; Khmelinskii, Igor; Sikorski, Marek; Koczorowski, Ryszard; Stopa, Janina

doi:10.1016/j.dental.2008.02.014

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Volume 24, Issue 10 , Pages 1329-1335, October 2008

Luminescence of selected dental composites in vitro

Anna Mazur-Koczorowska
- Medical Faculty II, Poznań University of Medical Sciences, Bukowska 70, 60-812 Poznań, Poland
Ewa Sikorska
- Faculty of Commodity Science, The Poznań University of Economics, al. Niepodległości 10, 60-967 Poznań Poland
Alina Krawczyk
- Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland
Igor Khmelinskii
- Universidade do Algarve, FCT, DQBF, Campus de Gambelas, 8005-139 Faro, Portugal
Marek Sikorski
- Faculty of Chemistry, A. Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland
- Corresponding author at: Applied Photochemistry Lab., Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznań, Poland. Tel.: +48 61 8291309; fax: +48 61 829 1505.
Ryszard Koczorowski
- Medical Faculty II, Poznań University of Medical Sciences, Bukowska 70, 60-812 Poznań, Poland
Janina Stopa
- Medical Faculty II, Poznań University of Medical Sciences, Bukowska 70, 60-812 Poznań, Poland

Received 23 August 2007; received in revised form 19 February 2008; accepted 19 February 2008.

Abstract

Objectives

The work was motivated by the necessity to evaluate the emission changes of dental composites, as the emission under UV light is one of the important optical parameters of the hard tooth tissue.

Methods

Fulfill extra, Artemis and Durafill VS materials in A3.5 shade were tested. Coffee, tea, red wine and distilled water (blank) were used as staining drinks. The samples were soaked for 7 days. Total luminescence matrices were collected with an interval of 1nm in emission and 10nm in excitation, in the front-face geometry.

Results

The exposure of dental composites to staining drinks caused a reduction in luminescence intensity by up to 40%, the magnitude of the reduction depending on the drink and on the composite material. In the special case of the intrinsically weak fluorescent Durafill VS, the exposure to coffee apparently caused an increase in luminescence intensity due to coffee components adsorbed on the sample surface.

Significance

It is important to improve the emission stability of dental composites. The presently proposed methods are effective in evaluating the emission of dental composites. Emission needs to be tested in addition to color, as the two parameters are uncorrelated.

Keywords: Total luminescence matrices, Color parameters, Dental composites, Color difference values, Reflectance spectra