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KMID : 1004520230390040195
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Journal of Dental Rehabilitation and Applied Science
2023 Volume.39 No. 4 p.195 ~ p.203
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Effect of surface sealant on surface roughness of dental composite with different surface roughness
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Shin Dong-Ah
Jin Seon-Ju
Bae Kkot-Byeol
Hwang In-Nam
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Abstract
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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 micro-defects 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.
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KEYWORD
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dental composite, surface roughness, surface sealant
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