Dentin-composite bond strength measurement using the Brazilian disk test
Dentin-composite bond strength measurement using the Brazilian disk test
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DOI：
10.1016/j.jdent.2016.07.002
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发表时间：
2016-09-01
影响因子：
4.4
通讯作者：
Fok, Alex
中科院分区：
文献类型：
--
作者：
Carrera, Carola A.;Chen, Yung-Chung;Fok, Alex
目的：本研究提出了一种用于评估复合树脂与牙本质之间粘结强度的巴西圆盘试验（BDT）的变体。方法：牙本质复合材料盘（φ 5 mm × 2 mm）的粘合剂，使用Z100或Z250（3 M ESPE）与三种粘合剂之一，Adper Easy Bond（EB）、Adper Scotchbond Multi-Purpose（MP）和Adper Single Bond（SB），并在径向压缩下进行测试。声发射（AE）和数字图像相关（DIC）被用来监测复合材料从牙本质环脱粘。建立有限元（FE）模型，使用失效载荷计算粘结强度。通过扫描电子显微镜（SEM）检查断裂模式。结果：绝大多数标本均沿着牙本质-树脂复合材料界面断裂。DIC和AE证实了牙本质环断裂前的界面脱粘。结果显示，EB的平均粘结强度（14.9 +/- 1.9 MPa）明显高于MP（13.2 +/- 2.4 MPa）或SB（12.9 +/- 3.0 MPa）（p < 0.05）; MP和SB之间无显著差异（p > 0.05）。Z100（14.5 +/- 2.3 MPa）的粘结强度高于Z250（12.7 +/- 2.5 MPa）（p < 0.05）。大多数样本（91.3%）显示出粘合失效模式。EB主要在牙本质-粘接剂界面处失败，而MP在复合材料-粘接剂界面处失败; SB样本在复合材料-粘接剂界面处失败，并在粘接剂中内聚。BDT变体被证明是测量牙本质和复合材料之间粘结强度的合适替代方案，具有零过早失效，降低了测量的可变性，临床意义：新的测试可以帮助预测粘接系统的临床性能更有效地和一致的降低变异系数的测量粘结强度。(C)2016爱思唯尔有限公司版权所有。
Objectives: This study presents a variant of the Brazilian disk test (BDT) for assessing the bond strength between composite resins and dentin.Methods: Dentin-composite disks (phi 5 mm x 2 mm) were prepared using either Z100 or Z250 (3M ESPE) in combination with one of three adhesives, Adper Easy Bond (EB), Adper Scotchbond Multi-Purpose (MP) and Adper Single Bond (SB), and tested under diametral compression. Acoustic emission (AE) and digital image correlation (DIC) were used to monitor debonding of the composite from the dentin ring. A finite element (FE) model was created to calculate the bond strengths using the failure loads. Fracture modes were examined by scanning electron microscopy (SEM). Results: Most specimens fractured along the dentin-resin composite interface. DIC and AE confirmed interfacial debonding immediately before fracture of the dentin ring.Results showed that the mean bond strength with EB (14.9 +/- 1.9 MPa) was significantly higher than with MP (13.2 +/- 2.4 MPa) or SB (12.9 +/- 3.0 MPa) (p < 0.05); no significant difference was found between MP and SB (p > 0.05). Z100 (14.5 +/- 2.3 MPa) showed higher bond strength than Z250 (12.7 +/- 2.5 MPa) (p < 0.05). Majority of specimens (91.3%) showed an adhesive failure mode. EB failed mostly at the dentin-adhesive interface, whereas MP at the composite-adhesive interface; specimens with SB failed at the composite-adhesive interface and cohesively in the adhesive.Conclusions: The BDT variant showed to be a suitable alternative for measuring the bond strength between dentin and composite, with zero premature failure, reduced variability in the measurements, and consistent failure at the dentin-composite interface.Clinical significance: The new test could help to predict the clinical performance of adhesive systems more effectively and consistently by reducing the coefficient of variation in the measured bond strength. (C) 2016 Elsevier Ltd. All rights reserved.