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首页> 外文期刊>Photodiagnosis and Photodynamic Therapy >Effect of Er,Cr:YSGG on bond strength and microleakage of dentin bonded to resin composite with different distance and irradiation time
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Effect of Er,Cr:YSGG on bond strength and microleakage of dentin bonded to resin composite with different distance and irradiation time

机译：Er，Cr：YSGG对不同距离和照射时间的牙本质与树脂复合材料粘接强度和牙本质微渗漏的影响

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Background: To explore the surface modification of dentin using Er,Cr:YSGG phototherapy and bonding system on the shear bond strength and microleakage scores at two different distances and times of laser irradiation.Materials and Methods: Ninety disease-free third molars were collected for the experiment. The four laser groups were divided on the basis of non-contact mode distance and time of irradiation: Group-I: Distance of 1 mm with duration of 60 s; Group-II: Distance of 1 mm with duration of 120 s; Group-III: Distance of 2 mm with duration of 60 s and; Group-IV: Distance of 2 mm with duration of 120 s. The surface for control group (Group-EB: Etch & bond group) was treated with etch and rinse bonding regime. Specimens from all the groups were assessed for shear bond strength and microleakage scores. Samples from all groups were immersed in 2% methylene blue for 24 h and assessed under a digital microscope for microleakage.Results: The lowest bond strength and microleakage was observed in the control group EB. The maximum bond strength score was observed in Group-IV with mean scores 23.41 +/- 1.83, while the maximum microleakage scores were observed in Group-II and Group-IV with mean scores 1.0 +/- 0.36 and 1.0 +/- 0.11, respectively. The lowest bond strength and microleakage among laser groups was observed in Group-II and Group-Ill, respectively. However, specimens in laser groups showed comparable bond strength and microleakge scores (p 0.05). For bond strength and microleakage values, analysis of variance showed significant difference among the study groups (p 0.001). Using Tukey post hoc test, bond strength and microleakage of laser groups showed statistically significant values than EB group.Conclusion: Use of phototherapy using Er,Cr:YSGG for dentin surface treatment has the potential for clinical application in comparison to conventional conditioning technique. Increasing the distance of laser application and time of irradiation has significant effect on the shear bond strength and microleakage scores of dentin bonded to resin composite. However, further in-vitro analysis should be undertaken in order to prove such findings.
机译：背景：为探讨Er，Cr：YSGG光疗和粘接系统对牙本质的表面改性作用，在两个不同的照射距离和时间下，其剪切粘接强度和微渗漏分数。材料与方法：收集90颗无病的第三磨牙用于本实验。根据非接触模式的距离和照射时间将激光分为四个组：I组：距离为1 mm，持续时间为60 s； I组：持续时间为60 s。第二类：距离为1毫米，持续时间为120 s；第三组：距离为2 mm，持续时间为60 s；第四组：距离为2 mm，持续时间为120 s。对照组（Group-EB：蚀刻和粘接组）的表面经过蚀刻和冲洗粘接处理。评估所有组的样品的剪切粘结强度和微渗漏评分。将所有组的样品浸入2％亚甲蓝中24 h，并在数字显微镜下评估微渗漏。结果：对照组EB的结合强度和微渗漏最低。在IV组中观察到最大粘结强度评分，平均评分为23.41 +/- 1.83，而II组和IV组中观察到最大微渗漏评分，平均评分为1.0 +/- 0.36和1.0 +/- 0.11，分别。在第二组和第三组中分别观察到最低的激光强度粘结强度和微渗漏。但是，激光组的标本显示出相当的粘结强度和微渗漏得分（p> 0.05）。对于粘结强度和微渗漏值，方差分析显示研究组之间存在显着差异（p <0.001）。通过Tukey事后检验，激光组的粘合强度和微渗漏量均比EB组具有统计学意义。结论：与传统的调理技术相比，使用Er，Cr：YSGG进行光疗进行牙本质表面治疗具有临床应用潜力。增加激光照射距离和照射时间对粘结到树脂复合材料上的牙本质的剪切粘结强度和微渗漏分数有重要影响。但是，应进行进一步的体外分析以证明这些发现。

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