Evaluation of physical properties of fiber-reinforced composite resin.,Dental Materials

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Evaluation of physical properties of fiber-reinforced composite resin.
Dental Materials ( IF 4.6 ) Pub Date : 2020-06-13 , DOI: 10.1016/j.dental.2020.04.012
Naoko Suzaki ₁ , Satoshi Yamaguchi ₂ , Nanako Hirose ₁ , Ryousuke Tanaka ₁ , Yusuke Takahashi ₁ , Satoshi Imazato ₂ , Mikako Hayashi ₁

Affiliation

Objectives

This study aimed to investigate physical properties of a fiber-reinforced CAD/CAM resin disc, which included woven layers of multi-directional glass fibers.

Methods

Fiber orientations of CAD/CAM specimens (TRINIA, SHOFU) were specified as longitudinal (L), longitudinal-rotated (LR), and anti-longitudinal (AL). A fiber-reinforced composite (everX posterior, GC (E)) and a conventional composite (Beauti core flow paste, SHOFU (B)) were also tested.

A three-point bending test and a tensile test with notchless prism-shaped specimens were conducted using a universal testing machine (AUTOGRAPH AG-IS, Shimadzu). A water absorption test was also carried out after the specimens were stored in water for 24 h or 1 week. Flexural strength and fracture toughness were obtained by conducting a three-point bending test.

Results

TRINIA L and LR groups showed significantly high flexural strength (254.2 ± 22.3 and 248.8 ± 16.7 MPa, respectively). Those were approximately 2.5 times higher than those in AL, E, and B groups (96.8–98.0 MPa) (p < 0.05, ANOVA and Tukey HSD test). No significant difference was shown in flexural modulus among the experimental groups. The fracture toughness in L group (9.1 ± 0.4 MPa/m^1/2) was found to be significantly higher than those in other groups (1.9–3.0 MPa/m^1/2; p < 0.05). TRINIA group demonstrated significantly lower water absorption (4.7 ± 1.9 μg/mm³) than did E (16.1 ± 3.1 μg/mm³) and B (17.3 ± 3.7 μg/mm³) groups (p < 0.05).

Significance

TRINIA demonstrated distinct anisotropy. TRINIA can be used as a superior restorative material when specifying directions of its fiber mesh layers.

中文翻译：

纤维增强复合树脂的物理性能评估。

目标

这项研究旨在研究纤维增强的CAD / CAM树脂圆盘的物理性能，其中包括多方向玻璃纤维的编织层。

方法

CAD / CAM标本（TRINIA，SHOFU）的纤维取向指定为纵向（L），纵向旋转（LR）和反纵向（AL）。还测试了纤维增强复合材料（everX后壁，GC（E））和常规复合材料（Beauti芯流浆，SHOFU（B））。

使用万能试验机（株式会社岛津制作所，AUTOGRAPH AG-IS）进行了无缺口棱柱状试样的三点弯曲试验和拉伸试验。将样本在水中存放24小时或1周后，还进行了吸水测试。通过进行三点弯曲试验获得弯曲强度和断裂韧性。

结果

TRINIA L和LR组显示出明显高的抗弯强度（分别为254.2±22.3和248.8±16.7 MPa）。这些比AL，E和B组（96.8–98.0 MPa）高约2.5倍（p <0.05，ANOVA和Tukey HSD测试）。实验组之间的弯曲模量没有显着差异。L组的断裂韧性（9.1±0.4 MPa / m ^1/2）明显高于其他组（1.9-3.0 MPa / m ^1/2；p <0.05）。TRINIA组的吸水率（4.7±1.9μg/ mm ³）明显低于E组（16.1± 3.1μg / mm ³）和B组（17.3±3.7μg/ mm ³）（p <0.05）。