The Effect of Light-Curing Duration and Different Composite Shades on Color Stability of Composite Resins

DOI

10.2991/idsm-17.2018.22How to use a DOI?

Keywords

composite resin, color stability, light curing duration, composite shades, light-emitting diodes

Abstract

Aims of this study is to evaluate the effect of light-curing duration using light-emitting diodes (LED) curing units and different composite shades on the color stability of the composite resins. Specimens in four shades of two types of com-posite resin were prepared and polymerized with the LED curing unit. The initial color parameters (L*,a*,b*,E*) were done using a spectropho-tometer before sub-jected to a thermocycling regimen comprising of 500 cycles in water of 55˚C and 5˚C. The final color readout was then performed to determine the color changes using ANOVA and Tukey-Kramer post-hoc test. After thermocycling regimen, the mean delta E* of specimens were in the range of 1.67 to 4.78. The mean delta a* of specimens were mostly positive, while the mean delta L* and delta b* were mostly negative. There was perceptible color change in most of the specimens as they were mostly darker value (negative delta L*), shifted towards reddish discol-oration (positive delta a*) and blueish discoloration (negative delta b*). The color change experienced by the specimens could not be anticipated in relation to cur-ing duration and types of composite shades as the effect was more likely depend-ent on individual material composition rather than actual shade classification. Neither light-cure duration nor difference in shades had significant effect on the amount of color change in composite resins.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Nurhanani Mohd Sadek
AU  - Nur Syuhadah Jamal
AU  - Victor Goh
AU  - Goo Chui Ling
PY  - 2018/05
DA  - 2018/05
TI  - The Effect of Light-Curing Duration and Different Composite Shades on Color Stability of Composite Resins
BT  - Proceedings of the 11th International Dentistry Scientific Meeting (IDSM 2017)
PB  - Atlantis Press
SP  - 172
EP  - 177
SN  - 2468-5739
UR  - https://doi.org/10.2991/idsm-17.2018.22
DO  - 10.2991/idsm-17.2018.22
ID  - MohdSadek2018/05
ER  -