PDF(Pubmed)
Abstract：
BACKGROUND: In recent years, tooth whitening has become one of the most popular ways of achieving the original tooth color. The effect of whitening gel can be improved through heat, light or laser. The bond strength between the enamel and the composite can be reduced through bleaching and laser radiation. The purpose of this study is to assess the shear bond strength of resin composite to enamel after a bleaching process using hydrogen peroxide, with and without a laser (970 nm and 445 nm lasers).
METHODS: This study used 51 extracted anterior teeth without caries that were divided into three groups. A 40% hydrogen peroxide gel was used on the enamel of all teeth. The control group received bleaching without a laser. Both the second and third treatment groups received bleaching with a laser, one with 970 nm and the other with 445 nm. After the bleaching process, all groups had etching, bonding and curing of the composite performed. Lastly, the shear bond strength between the enamel and the composite was measured and the failure modes were recorded. The data were compared using a one-way ANOVA test.
RESULTS: The mean shear bond strength between the enamel and the composite in the 445 nm group three (445 nanometer) was significantly lower than the other groups (p < 0.05). There was no significant difference between the control and the 970 nm groups (p = 0.2).
CONCLUSIONS: According to the laser wavelengths and parameters that were used in this study and the results of this study, office bleaching with a 445 nm laser weakened the shear bond strength between the enamel and the composite.
METHODS: This study used 51 extracted anterior teeth without caries that were divided into three groups. A 40% hydrogen peroxide gel was used on the enamel of all teeth. The control group received bleaching without a laser. Both the second and third treatment groups received bleaching with a laser, one with 970 nm and the other with 445 nm. After the bleaching process, all groups had etching, bonding and curing of the composite performed. Lastly, the shear bond strength between the enamel and the composite was measured and the failure modes were recorded. The data were compared using a one-way ANOVA test.
RESULTS: The mean shear bond strength between the enamel and the composite in the 445 nm group three (445 nanometer) was significantly lower than the other groups (p < 0.05). There was no significant difference between the control and the 970 nm groups (p = 0.2).
CONCLUSIONS: According to the laser wavelengths and parameters that were used in this study and the results of this study, office bleaching with a 445 nm laser weakened the shear bond strength between the enamel and the composite.
摘要：
背景：近年来，牙齿美白已成为实现原始牙齿颜色的最受欢迎的方法之一。美白凝胶的效果可以通过加热来提高，光或激光。釉质和复合材料之间的结合强度可通过漂白和激光辐射降低。这项研究的目的是评估使用过氧化氢漂白过程后树脂复合材料与牙釉质的剪切粘合强度，有和没有激光（970nm和445nm激光）。
方法：本研究使用51颗无龋齿的前牙，分为三组。在所有牙齿的釉质上使用40%过氧化氢凝胶。对照组接受无激光漂白。第二和第三治疗组均接受激光漂白，一个与970nm和其他与445nm。在漂白过程之后,所有组都进行了蚀刻，进行复合材料的粘合和固化。最后,测量搪瓷和复合材料之间的剪切粘结强度，并记录破坏模式。使用单向ANOVA检验比较数据。
结果：445nm组3（445纳米）的釉质与复合材料之间的平均剪切粘结强度显着低于其他组（p<0.05）。对照组和970nm组之间没有显著差异(p=0.2)。
结论：根据本研究中使用的激光波长和参数以及本研究的结果，用445nm激光进行的办公室漂白削弱了搪瓷和复合材料之间的剪切粘结强度。
方法：本研究使用51颗无龋齿的前牙，分为三组。在所有牙齿的釉质上使用40%过氧化氢凝胶。对照组接受无激光漂白。第二和第三治疗组均接受激光漂白，一个与970nm和其他与445nm。在漂白过程之后,所有组都进行了蚀刻，进行复合材料的粘合和固化。最后,测量搪瓷和复合材料之间的剪切粘结强度，并记录破坏模式。使用单向ANOVA检验比较数据。
结果：445nm组3（445纳米）的釉质与复合材料之间的平均剪切粘结强度显着低于其他组（p<0.05）。对照组和970nm组之间没有显著差异(p=0.2)。
结论：根据本研究中使用的激光波长和参数以及本研究的结果，用445nm激光进行的办公室漂白削弱了搪瓷和复合材料之间的剪切粘结强度。
