Polymerization shrinkage stress, internal adaptation, and dentin bond strength of bulk-fill restorative materials,International Journal of Adhesion and Adhesives

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Polymerization shrinkage stress, internal adaptation, and dentin bond strength of bulk-fill restorative materials
International Journal of Adhesion and Adhesives ( IF 3.2 ) Pub Date : 2021-08-04 , DOI: 10.1016/j.ijadhadh.2021.102964
Beatriz Curvello de Mendonça ₁ , Beatriz de Cássia Romano ₁ , Maicon Sebold ₂ , Bruna Marin Fronza ₃ , Roberto Ruggiero Braga ₄ , Gabriel Nima ₅ , Richard Bengt Price ₆ , Marcelo Giannini ₁

Affiliation

Purpose

To evaluate polymerization shrinkage stress (PSS), internal gap formation (IGF), and dentin bond strength (DBS) of one conventional resin composite and five bulk-fill restorative materials.

Materials and methods

One conventional resin composite (Filtek Supreme Ultra/SU) and five bulk-fill restorative materials: two regular paste-consistency composites (Tetric EvoCeram Bulk Fill/TE and Opus Bulk Fill/OP), one low-viscosity dual-cure composite (Fill-Up!/FI), one bioactive material (Activa BioActive Restorative/AC), and one high-viscosity glass ionomer (Equia Forte Fil/EQ) were tested. PSS was determined with a tensiometer attached to a universal testing machine (n = 5). For IGF, Class I cavities prepared in the occlusal surface of extracted third molars (n = 5) were filled up, cross-sectioned, and analyzed in scanning electron microscopy. The DBS was evaluated with microtensile bond strength test measured after 24 h or one-year storage. Data were statistically analyzed by one and two-way ANOVA and Tukey post-hoc test (α = 0.05).

Results

FI, SU, and OP presented higher PPS values and EQ showed the lowest ones. IGF was lower for OP and AC. SU showed the greatest DBS values and OP and FI the lowest after one-year storage.

Conclusions

No correlation between PSS and IGF was found. Little difference in DBS among the restorative materials was detected, and its stability was material dependent.

中文翻译：

填充修复材料的聚合收缩应力、内部适应和牙本质结合强度

目的

评估一种传统树脂复合材料和五种填充修复材料的聚合收缩应力 (PSS)、内部间隙形成 (IGF) 和牙本质粘合强度 (DBS)。

材料和方法

一种传统树脂复合材料 (Filtek Supreme Ultra/SU) 和五种散装填充修复材料：两种常规糊状稠度复合材料（Tetric EvoCeram Bulk Fill/TE 和 Opus Bulk Fill/OP），一种低粘度双固化复合材料（Fill -Up!/FI)、一种生物活性材料 (Activa BioActive Restorative/AC) 和一种高粘度玻璃离聚物 (Equia Forte Fil/EQ) 进行了测试。PSS 是用连接到万能试验机 (n = 5) 的张力计测定的。对于 IGF，在拔出的第三磨牙 (n = 5) 的咬合面上制备的 I 类腔被填充、横截面并在扫描电子显微镜下进行分析。DBS 是通过微拉伸粘合强度测试在 24 小时或一年储存后测量的。通过单因素和双因素方差分析和 Tukey 事后检验 (α = 0.05) 对数据进行统计分析。