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CC BY-NC-ND 4.0 · Eur J Dent 2021; 15(02): 259-265
DOI: 10.1055/s-0040-1718477
Original Article

Effect of Different Polishing Systems on the Surface Roughness and Gloss of Novel Nanohybrid Resin Composites

Hanan A. N. Soliman
1   Department of Operative Dentistry, Faculty of Dentistry, Kafrelsheikh University, Kafrelsheikh, Egypt
,
Naglaa Rizk Elkholany
2   Department of Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
,
Hamdi H. Hamama 
2   Department of Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
,
Fatma M. EL-Sharkawy
3   Department of Photometry, National Institute of Standards, Giza, Egypt
,
Salah H. Mahmoud
2   Department of Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
,
John C. Comisi 
4   Department of Oral Rehabilitation, Restorative Dentistry, Medical University of South Carolina, Charleston, South Carolina, United States
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Abstract

Objectives To evaluate the surface roughness and gloss of three nanohybrid resin composites after polishing with three different polishing systems.

Materials and Methods A total number of 112 disc specimens (10 × 3 mm) were prepared from nanohybrid—Empress Direct (ID), Grandio (GR), Filtek Z350 (Z350) and a microhybrid resin composite restorative materials—Filtek Z250 (Z250). Following 24-hour storage in 37°C distilled water, each composite group (n = 28) was assigned into four groups (n = 7) according to finishing/polishing (F/P) system: Mylar strip, Optrapol, Politip, and Sof-Lex (SL). The surface roughness (Ra, mm) was measured by a novel three-dimensional method using an image analysis software attached to an environmental scanning electron microscope. A glossometer was used to measure the surface gloss.

Results Statistical analysis used was ANOVA test. Two-way Anova test revealed that the “type of composite” and “F/P techniques” had a significant effect on both surface roughness and gloss of the tested resin composite materials (p < 0.05). Tukey’s post hoc test showed that ID, GR, and Z350 revealed lower surface roughness and higher surface gloss than Z250 within the same polishing system (p < 0.05). Sof-Lex polishing discs produced the lowest surface roughness and highest surface gloss values compared with Optrapol and Politip (p < 0.05).

Conclusion The tested F/P systems provided comparable surface roughness and gloss for nanohybrid composites. The Sof-Lex system provided the best surface roughness and gloss for nanohybrid composites.

Keywords

microhybrid - nanohybrid - roughness - gloss - polish - resin composite restorative material


Publication History

Article published online:
27 October 2020

© 2020. European Journal of Dentistry. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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