Comparison of Polishing Systems on the Surface Roughness of Resin Based Composites Containing Different Monomers

Changes in the organic matrix of composite resins have been proposed to improve their surface properties. However, polishing systems may perform differently in different materials. This study compared the effect of polishing systems on the surface roughness of four composite resins containing differ...

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Bibliographic Details
Published in:Journal of composites science 2022-05, Vol.6 (5), p.146
Main Authors: Augusto, Marina Gullo, de Andrade, Guilherme Schmitt, Mathias-Santamaria, Ingrid Fernandes, Dal Piva, Amanda Maria de Oliveira, Tribst, João Paulo Mendes
Format: Article
Language:English
Subjects:
adhesive dentistry
Bisphenol A glycidyl methacrylate
Composite materials
composite resins
dental polishing
Diamonds
Hypotheses
Monomers
operative dentistry
Polishing
Polymerization
Profilometers
Resins
Scanning electron microscopy
Smoothness
Software
Subgroups
Surface properties
Surface roughness
Variance analysis
Viscosity
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Summary:Changes in the organic matrix of composite resins have been proposed to improve their surface properties. However, polishing systems may perform differently in different materials. This study compared the effect of polishing systems on the surface roughness of four composite resins containing different resin monomers: Admira Fusion (nanohybrid containing pure ormocer), Aura Bulkfill (nanohybrid containing Bis-GMA, UDMA), Charisma Diamond (nanohybrid containing TCD-DI-HEA) and Vittra APS (nanofilled containing UDMA). Cylinders (N = 120, n = 10) were prepared from each material and the top surface of each specimen was grounded using a diamond finishing bur. Baseline measurements of surface roughness (Ra) were recorded using a contact profilometer and the specimens of each composite were divided into three subgroups according to the polishing system: one-step, two-step, three-step. Ra measurements were recorded also after polishing. Data were analyzed using three-way ANOVA and Tukey’s test (p < 0.05). The baseline roughness of all composites was significantly reduced after polishing (p < 0.001). The two-step polishing system provided the smoothest surface for Admira Fusion (0.0770 ± 0.0171) and Charisma (0.1091 ± 0.0090), whereas for Aura and Vittra no significantly differences were found for the three polishing systems tested. The surface smoothness seems to be more material dependent than step dependent, but all tested systems provided clinically acceptable results.
ISSN:2504-477X
2504-477X
DOI:10.3390/jcs6050146