J Dent Rehabil Appl Sci.  2023 Dec;39(4):195-203. 10.14368/jdras.2023.39.4.195.

Effect of surface sealant on surface roughness of dental composite with different surface roughness

• Shin DA
• Jin SJ
• Bae KB
• Hwang IN

• KMID: 2550428
• DOI: http://doi.org/10.14368/jdras.2023.39.4.195

Abstract

Purpose
This study aimed to evaluate the influence of surface sealants on the surface roughness of composite resins.
Materials and Methods
The study used microfilled composite resin (Metafil CX, Sun Medical Co.) and hybrid composite resin (Aelite™ LS posterior, Bisco). Sixty specimens (8 mm in diameter and 4 mm in height) of each composite resin type were prepared and divided into 3 groups. Each specimen was ground with 600, 1000, and 2000-grit sandpaper. The Surface roughness (Ra) values were measured using a surface roughness tester (SJ-301, Mytutoyo) before and after surface sealant application. Surface sealants, BisCover™ LV (Bisco), Optiguard® (Kerr), and Seal-n-Shine™ (Pulpdent), were applied to the specimens, as instructed and observed by scanning electron microscope (JSM-7500, JEOL) and atomic force microscope (MultiMode IV, Veeco Instruments).
Results
Specimens ground with 600-grit sandpaper coated with surface sealants exhibited significantly lower Ra values than the untreated group (P < 0.05). Specimens ground with 1000 and 2000-grit sandpaper showed statistically no difference. There was no significant difference in surface roughness among BisCover™ LV, Optiguard®, and Seal-n-Shine™. SEM and AFM revealed remarkably decreased microdefects on the surfaces of composite resins after surface sealant application.
Conclusion
Surface sealants can influence surface roughness when applied on the rough surface of composite resins but not on highly polished composite resins.

Keyword

dental composite; surface roughness; surface sealant

Figure

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  Fig. 1 Surface roughness (Ra, μm) of Aelite™ LS Posterior composite resins. * Statistically significant (P < 0.05).

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  Fig. 2 Surface roughness (Ra, μm) of Metafil CX composite resins. * Statistically significant (P < 0.05).

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  Fig. 3 nning electron micrographs of Aelite™ LS Posterior resins that were polished with 600 grit sand paper and treated with Surface sealants (× 2500). (A) Untreated, (B) BisCover LV, (C) Optiguard, (D) Seal-n-Shine.

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  Fig. 4 Scanning electron micrographs of Aelite™ LS Posterior resins that were polished with 1000 grit sand paper and treated with Surface sealants (× 2500). (A) Untreated, (B) BisCover LV, (C) Optiguard, (D) Seal-n-Shine.

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  Fig. 5 Scanning electron micrographs of Aelite™ LS Posterior resins that were polished with 2000 grit sand paper and treated with Surface sealants (× 2500). (A) Untreated, (B) BisCover LV, (C) Optiguard, (D) Seal-n-Shine.

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  Fig. 6 Scanning electron micrographs of Metafil CX resins that were polished with 600 grit sand paper and treated with Surface sealants (× 2500). (A) Untreated, (B) BisCover LV, (C) Optiguard, (D) Seal-n-Shine.

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  Fig. 7 Scanning electron micrographs of Metafil CX resins that were polished with 1000 grit sand paper and treated with Surface sealants (× 2500). (A) Untreated, (B) BisCover LV, (C) Optiguard, (D) Seal-n-Shine.

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  Fig. 8 Scanning electron micrographs of Metafil CX resins that were polished with 2000 grit sand paper and treated with Surface sealants (× 2500). (A) Untreated, (B) BisCover LV, (C) Optiguard, (D) Seal-n-Shine.

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  Fig. 9 Atomic force microscopy images of Aelite™ LS Posterior resins that were polished with 2000 grit sand paper and treated with Surface sealants. (A) Untreated, (B) BisCover LV, (C) Optiguard, (D) Seal-n-Shine.

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  Fig. 10 Atomic force microscopy images of Metafil CX resins that were polished with 2000 grit sand paper and treated with Surface sealants. (A) Untreated, (B) BisCover LV, (C) Optiguard, (D) Seal-n-Shine.

Reference

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