Effect of polymerisation protocols on water sorption, solubility and hygroscopic expansion of fast-cure bulk-fill composite

IF 4.6 1区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Dental Materials Pub Date : 2024-06-01 DOI:10.1016/j.dental.2024.04.010

Halah Thanoon , Nikolaos Silikas , David C. Watts

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引用次数: 0

Abstract

Objective

This study examines the effect of two light-curing protocols from a LED polywave light curing unit (LCU) on water sorption, solubility, and hygroscopic expansion of fast and conventional bulk-fill resin-based composites (RBCs) aged in distilled water for 120 d.

Methods

Three bulk-fill RBCs materials were studied: Tetric PowerFill® (fast photo-polymerised composite) (TPF), Tetric EvoCeram bulk-fill (EVO), and GrandioSo x-tra bulk-fill (GSO) (conventional photo-polymerised composites). Specimens were prepared within a 3D-printed resin mold (8-mm diameter x 4-mm height) and light-cured from one side only with 2 modes of polywave LCU (Bluephase® PowerCure): 3 s mode and for 20 s in “Standard” mode. Water sorption and solubility were measured at fixed time intervals for 120 d of distilled water storage, then reconditioned to dry to measure desorption for 75 d, all at 37 ± 1 °C. Hygroscopic (volumetric) expansion was recorded at the same time intervals up to 120 d. Data were analysed through SPSS using Two-way ANOVA, One-way ANOVA, independent t-tests, and Tukey’s post-hoc correction tests (p < 0.05).

Results

TPF, when irradiated for 3 s demonstrated minimal water sorption (0.83%), solubility (1.01 μg/mm³), and least volumetric expansion (1.64%) compared to EVO and GSO. While EVO showed the highest water sorption (1.03%) and solubility (1.95 μg/mm³) at 3 s. GSO had the lowest sorption (0.67%) and (0.56%) in 3 s and 20 s protocols, respectively. Nevertheless, all the sorption and solubility data were within the ISO 4049 limits.

Significance

For TPF, fast (3 s) polymerisation did not increase either water sorption or solubility, compared with 20 s irradiation. However, with the two comparative bulk-fill composites, fast cure increased water sorption by 15–25% and more than doubled solubility. These findings were consistent with the lesser volumetric expansions observed for Tetric PowerFill at both the fast and standard protocols, indicating its relative stability across polymerisation protocols.

查看原文本刊更多论文

聚合协议对快速固化散装填充复合材料吸水性、溶解性和吸湿膨胀性的影响。

研究目的本研究探讨了 LED 多波段光固化装置（LCU）的两种光固化方案对在蒸馏水中老化 120 d 的快速和传统散装填充树脂基复合材料（RBC）的吸水性、溶解性和吸湿膨胀性的影响：研究了三种松装树脂基复合材料：方法：研究了三种散装填充 RBC 材料：Tetric PowerFill®（快速光聚合复合材料）（TPF）、Tetric EvoCeram 散装填充材料（EVO）和 GrandioSo x-tra 散装填充材料（GSO）（传统光聚合复合材料）。在 3D 打印树脂模具（直径 8 毫米 x 高度 4 毫米）中制备试样，并使用聚波 LCU（Bluephase® PowerCure）的两种模式仅从一侧进行光固化：3 秒模式和 20 秒 "标准 "模式。在蒸馏水储存 120 天后，以固定的时间间隔测量吸水性和溶解性，然后在 37 ± 1 °C 下干燥 75 天后测量解吸性。数据通过 SPSS 进行分析，采用双向方差分析、单向方差分析、独立 t 检验和 Tukey 事后校正检验（p 结果）：与 EVO 和 GSO 相比，TPF 在辐照 3 秒后的吸水率（0.83%）、溶解度（1.01 μg/mm3）和体积膨胀率（1.64%）均最小。GSO 在 3 秒和 20 秒时的吸水率（0.67%）和溶解度（0.56%）分别最低。尽管如此，所有的吸附和溶解度数据都在 ISO 4049 的限制范围之内：对于 TPF 而言，与 20 秒辐照相比，快速聚合（3 秒）不会增加水的吸附性或溶解性。然而，对于两种比较型散装填充复合材料，快速固化可使吸水性增加 15-25%，溶解度增加一倍以上。这些发现与 Tetric PowerFill 在快速固化和标准固化过程中体积膨胀较小的情况一致，表明其在不同聚合过程中具有相对稳定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Dental Materials 工程技术-材料科学：生物材料

CiteScore

9.80

自引率

10.00%

发文量

290

审稿时长

67 days

期刊介绍： Dental Materials publishes original research, review articles, and short communications. Academy of Dental Materials members click here to register for free access to Dental Materials online. The principal aim of Dental Materials is to promote rapid communication of scientific information between academia, industry, and the dental practitioner. Original Manuscripts on clinical and laboratory research of basic and applied character which focus on the properties or performance of dental materials or the reaction of host tissues to materials are given priority publication. Other acceptable topics include application technology in clinical dentistry and dental laboratory technology. Comprehensive reviews and editorial commentaries on pertinent subjects will be considered.

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