Jbara, L., Ghoneim, M., Ragab, H. (2019). Influence of the thickness of enamel layer on overall color of composite restoration using different polychromatic composite resins. test, 65(Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)), 3769-3775. doi: 10.21608/edj.2019.76023
Layal Jbara; Mona Ghoneim; Hala Ragab. "Influence of the thickness of enamel layer on overall color of composite restoration using different polychromatic composite resins". test, 65, Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), 2019, 3769-3775. doi: 10.21608/edj.2019.76023
Jbara, L., Ghoneim, M., Ragab, H. (2019). 'Influence of the thickness of enamel layer on overall color of composite restoration using different polychromatic composite resins', test, 65(Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)), pp. 3769-3775. doi: 10.21608/edj.2019.76023
Jbara, L., Ghoneim, M., Ragab, H. Influence of the thickness of enamel layer on overall color of composite restoration using different polychromatic composite resins. test, 2019; 65(Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics)): 3769-3775. doi: 10.21608/edj.2019.76023

Influence of the thickness of enamel layer on overall color of composite restoration using different polychromatic composite resins

Egyptian Dental Journal
Article 23, Volume 65, Issue 4 - October (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), October 2019, Pages 3769-3775    PDF (535.22 K)
Document Type: Original Article
DOI: 10.21608/edj.2019.76023
Authors
Layal Jbara1; Mona Ghoneim2; Hala Ragab3
1MSc student, Operative and Esthetic dentistry, Faculty of Dentistry, Beirut Arab University, Lebanon
2Associate Professor of restorative dentistry, faculty of dentistry, Alexandria university, Egypt
3Professor of Operative and Esthetic dentistry, Division Director, Department of Restorative Sciences, Faculty of Dentistry, Beirut Arab University, Lebanon
Abstract
The purpose of this study was to calculate and study the color components (Chroma and Value) and translucency of resin composites at different thicknesses.
Method: resin composites shade A1 were used in this study; Filtek Z350 XT 3M (FT), Harmonize Kerr (HK), and Empress Direct Ivoclar Vivadent (ED). All samples were fabricated with same dentin thickness of 2mm, while the enamel samples were prepared in two thickness; 0.5mm and 1mm. Transparency parameter evaluation was done by measuring the CIELAB parameters of each sample once against white background and once against black. ∆E was used to evaluate the change in color of composite resin at different thicknesses. One-way ANOVA and Tukey HSD test were used to analyze the descriptive statistics. Pearson correlation coefficient was used to conclude a relation between thickness and chroma; and thickness and value.
Results: There was a significant difference in translucency in all composite groups at enamel thickness 0.5 and 1mm. ∆E showed significant difference when comparing group FT with ED and HK, but no significant difference when comparing groups ED and HK. As for chroma, groups ED and FT showed a decrease in chroma as thickness increased and the results were significant at (p<0.05), while groups HK showed increase in chroma but the results were insignificant.
Conclusion: As thickness increases the translucency and chroma of the composite resin decreases.
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