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. 2023 Jan-Feb;26(1):36-41.
doi: 10.4103/jcd.jcd_395_22. Epub 2022 Dec 8.

Effect of different polishing systems and speeds on the surface roughness of resin composites

Hatice Tepe  1 , Ayse Dina Erdılek  2 , Merve Sahın  2 , Begüm Güray Efes  2 , Batu Can Yaman  1
Affiliations

Effect of different polishing systems and speeds on the surface roughness of resin composites

Hatice Tepe et al. J Conserv Dent. 2023 Jan-Feb.

Abstract

Aims and objectives: The objective of this study was to compare surface roughness of a nano-spherical resin composite using four different multi-step polishing disc systems at five different speeds.

Materials and methods: In total, 154 discs samples were prepared using a supra-nano spherical resin composite. The samples were divided into negative and positive control groups and the following four finishing and polishing disc systems: Sof-Lex, Bisco Finishing Discs, OptiDisc, and Super-Snap. Each polishing disc system was applied at five different speeds (2000, 5000, 10,000, 15,000, and 20,000 revolutions per minute [RPM]) (n = 7). The surface roughness of samples was measured using a profilometer. One sample from each group was evaluated by scanning electron microscopy and atomic force microscopy. Two-way analysis of variance was used to evaluate the average roughness (Ra) data from the profilometric experiments using statistical software (GraphPad Prism4-GraphPad Software; La Jolla, CA, USA). The mean values were compared using the Bonferroni test (P = 0.05).

Results: The mean roughness ranged from 0.07 μm to 0.41 μm. The smoothest surfaces were obtained with OptiDisc at 20,000 RPM and Super-Snap at 20,000 RPM. The Bisco Finishing Discs group at 2,000 RPM showed the highest surface roughness values. For all polishing systems, the roughness at 20,000 RPM was lower than that at other speeds.

Conclusion: Within the limitations of the present in vitro study, it can be concluded that the polishing performance was in the following order: Super-Snap > OptiDisc > Sof-Lex > Bisco Finishing Discs. In addition, the surface roughness decreased as the polishing speed increased.

Keywords: Multi-step polishing; profilometer; resin composite; speed; surface roughness.

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Conflict of interest statement

There are no conflicts of interest.

Figures

Figure 1
Figure 1
Comparison of average roughness (Ra) among polishing disc systems with different speeds
Figure 2
Figure 2
SEM (left) and AFM (right) images of the resin composite after polishing with, (A) Sof-Lex; (B) Bisco Finishing Discs; (C) OptiDisc; (D) Super-Snap the surface has few pitting or scratches, and it is almost smooth; (E) Mylar; (F) 600 Grit SiC paper (×500), SEM: Scanning electron microscopy, AFM: Atomic force microscopy
See this image and copyright information in PMC

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