Effect of thickness on the degree of conversion, monomer elution, depth of cure and cytotoxicity of bulk-fill composites.

IF 1.9 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE Journal of oral science Pub Date : 2023-01-01 DOI:10.2334/josnusd.22-0374

Zehra Süsgün Yıldırım, Ersan Eyiler, Zeliha G Bek Kürklü

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Abstract

Purpose: Today, bulk-fill composites are used as a single layer with a thickness of up to 4-5 mm. However, is proper polymerization achieved with this increased thickness?

Methods: This study was designed to investigate the effect of thickness on the degree of conversion (DC) (n = 6), the elution of monomers (n = 6), depth of cure (DoC) (n = 10) and cytotoxicity (n = 6) of the bulk-fill composites SDR Flow Plus (SDR), SonicFill2 SingleFill (SF) and ACTIVA Bioactive Restorative (ACT) in comparison to the conventional G-aenial Posterior (GC). Two-way analysis of variance (ANOVA) was used to assess the interaction between materials and surfaces, and one-way ANOVA and Tukey tests were used to compare the degree of conversion, monomer elution and cytotoxicity values (P < 0.05).

Results: The highest DC was found at the top surface of SDR, while the lowest DC was found at SF. The V2 mm/V0 mm DoC ratios of the composites except ACTs were appropriate according to the threshold. None of the composites were cytotoxic on day 1.

Conclusion: In bulk-fill composites, DC decreased and monomer elution increased with increasing depth. The V4 mm/V0 mm ratios of all bulk-fill groups were not appropriate. Additionally, only ACTs had a cell viability of <70% on day 7.

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厚度对大块填充复合材料转化程度、单体洗脱、固化深度和细胞毒性的影响。

用途:今天，大块填充复合材料被用作单层，厚度可达4-5毫米。然而，随着厚度的增加，是否实现了适当的聚合?方法:本研究旨在研究厚度对体积填充复合材料SDR Flow Plus (SDR)、SonicFill2 SingleFill (SF)和ACTIVA Bioactive Restorative (ACT)的转化率(DC) (n = 6)、单体洗脱(n = 6)、固化深度(DoC) (n = 10)和细胞毒性(n = 6)的影响，并与常规g - enial Posterior (GC)进行比较。采用双向方差分析(ANOVA)评价材料与表面的相互作用，采用单因素方差分析和Tukey检验比较转化程度、单体洗脱和细胞毒性值(P < 0.05)。结果:SDR上表面DC最高，SF最低。除ACTs外，复合材料的V2 mm/V0 mm DoC比均符合阈值要求。在第1天，所有复合物都没有细胞毒性。结论:随着深度的增加，体积填充复合材料的DC降低，单体洗脱量增加。各填充组的V4 mm/V0 mm比例均不合适。此外，只有ACTs的细胞存活率为

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