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    Effect of Different Adhesive Strategies on the Microshear Bond Strength of Calcium-Silicate-Based Materials
    (Sage Publications India Pvt Ltd, 2022) Gurcan, Aliye Tugce; Sismanoglu, Soner; Sengez, Gorkem
    Aim: To evaluate the microshear bond strength (mu SBS) of mineral trioxide aggregate and Biodentine to various resin-based materials using different adhesive strategies. Materials and Methods: Three resin-based materials-a self-adhering resin composite with or without acid etching (Vertise flow; Kerr, Orange, CA, USA), a conventional flowable composite with a total-etch adhesive (Filtek Ultimate Flowable; 3M ESPE, St. Paul, MN, USA), and a flowable resin-modified glass ionomer cement (RMGIC) without any surface modification (lonoseal; VOCO GmbH, Cuxhaven, Germany)-and two calcium-silicate-based materials-Biodentine and BIOfactor mineral trioxide aggregate (MTA)-were tested. A total of 100 cylindrical acrylic molds were prepared. Biodentine and BlOfactor MTA were prepared and placed into the central holes on the molds. Specimens were divided into two main groups according to materials and into five subgroups (n = 10). mu SBS were evaluated using a mu SBS testing device. The failure modes were examined under a stereomicroscope with magnification. They were categorized as adhesive, cohesive, or mixed. Data were analyzed using two-way analysis of variance (ANOVA) and Tukey test. The significance level was taken as alpha = 0.05. Results: It was observed that both calcium-silicate-based material type and resin-based material type influenced the mu SBS significantly according to two-way ANOVA. Biodentine exhibited higher bond strength values than MTA. However, no statistically significant interaction was demonstrated between these factors (P = .396). The mu SBS values of intermediate materials to Biodentine and MTA were listed from the lowest to the highest as follows: RMGIC < Acid Etch + RMGIC < SARC (self-adhering resin composite) < FC (flowable composite) < Acid Etch + SARC. Conclusion: Self-adhering composites can be used on calcium-silicate-based materials in vital pulp treatments because of their mechanical properties. Acid-etching ensures high mu SBS values. Although the mu SBS of Biodentine were higher than MTA according to this study's results, there was no statistically significant difference in mu SBS of FC and acid-etched SARC to MTA.
  • [ X ]
    Öğe
    Effects of different irrigation protocols on push-out bond strength of pre-mixed calcium silicate-based cements
    (Springer, 2023) İlisulu, Sabiha Ceren; Gürcan, Aliye Tugce; Sismanoglu, Soner
    The aim of this study was to evaluate the push-out bond strength and microhardness of three different calcium silicate-based cements for root canal dentin after exposure to different irrigation protocols. Three standardized canal-like holes with an 0.8-mm diameter were created on each root dentin slice with a thickness of 1 ± 0.1 mm and filled with either Biodentine, NeoPUTTY, or Well-Root PT. One hundred samples were randomly divided into five subgroups (n = 20) according to the different irrigation protocols: distilled water, saline, NaOCI, NaOCI/EDTA, and NaOCI/EDTA/CHX. All samples were subjected to a push-out bond strength (PBS) test. Ten specimens of each perforation material were prepared and randomly divided into five subgroups and exposed to the same irrigation protocols. Vickers microhardness (HV) was evaluated. Data were analyzed using a two-way analysis of variance and Tukey HSD test. The level of significance was 5%. The mean PBS values in the Biodentine after control (5.93 ± 1.98), saline (6.21 ± 1.95), and NaOCI/EDTA (5.63 ± 1.56) irrigations were significantly greater than those of NeoPUTTY and Well-Root PT after the same irrigations (p < 0.05). The Biodentine had a significantly higher HV than the NeoPUTTY and Well-Root PT in all irrigation protocols except NaOCI irrigation (p < 0.05). The irrigation protocols did not influence the PBS of the cements. The saline (70.2 ± 8.6) and NaOCI/EDTA (73.7 ± 8.1) resulted in higher surface microhardness values in Biodentine compared to other irrigation protocols. The NeoPUTTY and Well-Root PT can be considered as a potentially useful perforation repair material in all irrigation protocol.