Effect of Modeling Resins on Microhardness of Resin Composites

Ezgi T Bayraktar, Pinar Y Atali, Bora Korkut, Ezgi G Kesimli, Bilge Tarcin, Cafer Turkmen, Ezgi T Bayraktar, Pinar Y Atali, Bora Korkut, Ezgi G Kesimli, Bilge Tarcin, Cafer Turkmen

Abstract

Objectives: This study was aimed to determine the effects of modeling resins on the surface microhardness of composites.

Materials and methods: Six resin-based composites (Charisma Smart, Estellite Asteria, CeramX-One SphereTEC, Admira Fusion, Filtek Ultimate, and Clearfil Majesty Es-2) and three wetting agents (Modeling Liquid, Composite Primer, and Modeling Resin) were investigated. In all, 240 specimens were prepared, and wetting agents were applied prior to light curing in the experimental groups. After 24 hours, specimens were polished and Vickers microhardness (VHN) values were measured.

Statistical analysis: Shapiro-Wilk and two-way analysis of variance (ANOVA) were used for analyses (p < 0.05).

Results: Both modeling resin and composites were determined to be effective factors (p < 0.001). The control group showed the highest VHN (70.37 ± 7.94), followed by Modeling Liquid (64.68 ± 12.07), Composite Primer (59.84 ± 6.33), and Modeling Resin (58 ± 3.52b; p < 0.001). Filtek Ultimate showed the highest VHN (76.62 ± 9.78c), whereas Charisma Smart (58.87 ± 7.95), and Clearfil Majesty (67.27 ± 2.58) showed the lowest (p < 0.001). Clearfil Majesty-Modeling Liquid (46.62 ± 5.33) and Charisma Smart-Composite Primer (50.81 ± 0.39) combinations showed the lowest VHN, whereas Filtek Ultimate-control (87.15 ± 2.12) and Filtek Ultimate-Modeling Liquid (84.24 ± 3.11) showed the highest (p < 0.001).

Conclusion: All tested modeling resins decreased VHN value, and the amount of reduction varied among composites and wetting agents. It might be safer not to use wetting agents unless they are necessary.

Conflict of interest statement

None declared.

European Journal of Dentistry. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

Figures

Fig. 1
Fig. 1
Mean and standard deviation of VHN values, regarding modelling resins and composites. VHN, Vickers microhardness.

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