NDLI: Varying the Polishing Protocol Influences the Color Stability and Surface Roughness of Bulk-Fill Resin-Based Composites

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Varying the Polishing Protocol Influences the Color Stability and Surface Roughness of Bulk-Fill Resin-Based Composites

Content Provider	MDPI
Author	Lu, ís Proença Freitas, Filipa Melo, Teresa Pinheiro De Delgado, António Monteiro, Paulo Rua, João Caldeira, Jorge Azul, Ana Mano Mendes, José
Copyright Year	2020
Description	Surface properties of composites such as roughness and color impact periodontal health and aesthetic outcomes. Novel bulk-fill composites with improved functionality are being introduced and, in light of the existing variety of finishing/polishing procedures, research of their surface properties is warranted. Sixty discs were prepared from bulk-fill composites (Filtek™ Bulk Fill Posterior Restorative and Fill-Up™) and incremental-fill Filtek™ Z250. They were further divided according to different polishing procedures (n = 5): three multi-step polishing procedures or finishing with a bur (control). Surface roughness (Ra) was measured using an atomic force microscope (The AFM Workshop TT-AFM). A spectrophotometer (Spectroshade Micro Optic) was used to determine color stability, after exposure to a coffee solution. Data were analyzed using two-way MANOVA (significance level of 5%). Resin composite type, polishing procedure, and their interaction had a statistically significant effect on surface roughness (p < 0.001) and color change (p < 0.001). Fill-Up™ exhibited the highest surface roughness and greatest color change. Differences in color change were statistically significant (p < 0.001). Filtek™ Bulk Fill registered the lowest surface roughness and color change, after the three-step polishing procedure. Both parameters were significantly correlated (ρ = 0.754, p < 0.001) and found to be material dependent and polishing-procedure dependent. Higher surface roughness relates to greater color changes.
Starting Page	1
e-ISSN	20794983
DOI	10.3390/jfb12010001
Journal	Journal of Functional Biomaterials
Issue Number	1
Volume Number	12
Language	English
Publisher	MDPI
Publisher Date	2020-12-22
Access Restriction	Open
Subject Keyword	Journal of Functional Biomaterials Dentistry and Oral Surgery Color Stability Dental Composites Methacrylate-based Resin Surface Roughness
Content Type	Text
Resource Type	Article

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