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

Hanan A N Soliman; Naglaa Rizk Elkholany; Hamdi H Hamama; Fatma M El-Sharkawy; Salah H Mahmoud; John C Comisi

doi:10.1055/s-0040-1718477

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

Eur J Dent. 2021 May;15(2):259-265. doi: 10.1055/s-0040-1718477. Epub 2020 Oct 27.

Authors

Hanan A N Soliman¹, Naglaa Rizk Elkholany², Hamdi H Hamama², Fatma M El-Sharkawy³, Salah H Mahmoud², John C Comisi⁴

Affiliations

¹ Department of Operative Dentistry, Faculty of Dentistry, Kafrelsheikh University, Kafrelsheikh, Egypt.
² Department of Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
³ Department of Photometry, National Institute of Standards, Giza, Egypt.
⁴ Department of Oral Rehabilitation, Restorative Dentistry, Medical University of South Carolina, Charleston, South Carolina, United States.

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.

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