ARTIFICIAL ACCELERATED AGING EFFECTS ON THE COLOR AND GLOSS STABILITY OF MODERN UNIVERSAL RESIN COMPOSITES: AN IN-VITRO STUDY

Document Type : Original Article

Authors

1 Lecturer in Operative and Conservative Dentistry Department, Faculty of Dentistry, Nahda University, Beni-Suef, Egypt

2 Lecturer in Restorative Dentistry Department, Faculty of Dentistry, Modern University for Technology and Information, Cairo, Egypt

Abstract

ABSTRACT:
Background: Progression in filler technology has given rise to the introduction of modern universal resin composites, which simplify shade selection; however, their performances after artificial accelerated aging are yet to be examined and verified.
Objectives: To evaluate and compare the color and gloss stability of different modern universal composites submitted to different periods of artificial accelerated aging.
Materials and Methods: Forty disc-shaped composite specimens were fabricated, cured and polished then divided into four groups (n=10): (G1; Omnichroma, G2; Filtek Universal Restorative, G3; TPH Spectra ST, G4; Filtek Z350 XT). Color and gloss were measured before and after exposing to weathering device for (100, 200, 300 hours). The color change (ΔE*) was assessed with a spectrophotometer. The surface gloss was calculated using a glossmeter. Results were statistically analyzed using repeated measures ANOVA test followed by Bonferroni’s post-hoc test (P ≤ 0.05).
Results: ΔE* was observed to be a positive linear function of log time. ΔE* was maximal in the sequence; Filtek Z350 XT = TPH Spectra ST > Omnichroma > Filtek Universal Restorative. ΔE* remained < 3.3 for Filtek Universal Restorative and Omnichroma. Gloss was observed to be a negative linear function of log time. Gloss was maximal in the sequence; Omnichroma > Filtek Universal Restorative > Filtek Z350 XT > TPH Spectra ST.
Conclusions: Omnichroma and Filtek Universal Restorative demonstrated superior performance in color and gloss stability compared to TPH Spectra ST and Filtek Z350 XT.

Keywords

Main Subjects

Egyptian Dental Journal
Volume 68, Issue 3 - Serial Number 5
July (Conservative Dentistry and Endodontics)
July 2022
Pages 2875-2886

Files

Share

How to cite

Statistics