目的:通过微拉伸粘结强度检测法,比较3种不同的牙本质粘结剂Single Bond 2、SE Bond和Easy One的粘结强度,为临床应用提供参考。方法:选用30个新鲜拔除的人磨牙,磨除牙合面釉质暴露牙本质,随机分为3组,每组10个牙,分别使用Single Bond 2...目的:通过微拉伸粘结强度检测法,比较3种不同的牙本质粘结剂Single Bond 2、SE Bond和Easy One的粘结强度,为临床应用提供参考。方法:选用30个新鲜拔除的人磨牙,磨除牙合面釉质暴露牙本质,随机分为3组,每组10个牙,分别使用Single Bond 2、SE Bond、Easy One粘结剂,再用蓝色复合树脂充填5 mm高度。在流水下,用慢速锯垂直于粘结面制备成1.0 mm×1.0 mm横截面积的柱状试件,用微拉伸测试仪测试其微拉伸强度,用体视显微镜观察样本断裂类型,对微拉伸强度测试值和断裂类型进行统计学分析。结果:Single Bond 2组的微拉伸强度为(23.40±6.20)MPa,Easy One组为(16.25±4.42)MPa,SE Bond组(16.17±4.78)MPa。经方差分析,Single Bond 2组与另两组粘结剂微拉伸强度均有显著性差异(P<0.05),而SE Bond组和Easy One组无显著性差异(P>0.05)。结论:Single Bond 2粘结强度优于Easy One、SE Bond,3种粘结剂的粘结强度均可满足临床应用要求。展开更多
A novel capacitive pressure sensor is presented, whose sensing structure is a solid-state capacitor consisting of three square membranes with Al/SiO2/n-type silicon. It was fabricated using pn junction self-stop etchi...A novel capacitive pressure sensor is presented, whose sensing structure is a solid-state capacitor consisting of three square membranes with Al/SiO2/n-type silicon. It was fabricated using pn junction self-stop etching combined with adhesive bonding,and only three masks were used during the process. Sensors with side lengths of 1000,1200,and 1400μm were fabricated,showing sensitivity of 1.8,2.3, and 3.6fF/hPa over the range of 410～ 1010hPa, respectively. The sensi- tivity of the sensor with a side length of 1500μm is 4. 6fF/hPa,the nonlinearity is 6. 4% ,and the max hysteresis is 3.6%. The results show that permittivity change plays an important part in the capacitance change.展开更多
文摘目的:通过微拉伸粘结强度检测法,比较3种不同的牙本质粘结剂Single Bond 2、SE Bond和Easy One的粘结强度,为临床应用提供参考。方法:选用30个新鲜拔除的人磨牙,磨除牙合面釉质暴露牙本质,随机分为3组,每组10个牙,分别使用Single Bond 2、SE Bond、Easy One粘结剂,再用蓝色复合树脂充填5 mm高度。在流水下,用慢速锯垂直于粘结面制备成1.0 mm×1.0 mm横截面积的柱状试件,用微拉伸测试仪测试其微拉伸强度,用体视显微镜观察样本断裂类型,对微拉伸强度测试值和断裂类型进行统计学分析。结果:Single Bond 2组的微拉伸强度为(23.40±6.20)MPa,Easy One组为(16.25±4.42)MPa,SE Bond组(16.17±4.78)MPa。经方差分析,Single Bond 2组与另两组粘结剂微拉伸强度均有显著性差异(P<0.05),而SE Bond组和Easy One组无显著性差异(P>0.05)。结论:Single Bond 2粘结强度优于Easy One、SE Bond,3种粘结剂的粘结强度均可满足临床应用要求。
文摘A novel capacitive pressure sensor is presented, whose sensing structure is a solid-state capacitor consisting of three square membranes with Al/SiO2/n-type silicon. It was fabricated using pn junction self-stop etching combined with adhesive bonding,and only three masks were used during the process. Sensors with side lengths of 1000,1200,and 1400μm were fabricated,showing sensitivity of 1.8,2.3, and 3.6fF/hPa over the range of 410～ 1010hPa, respectively. The sensi- tivity of the sensor with a side length of 1500μm is 4. 6fF/hPa,the nonlinearity is 6. 4% ,and the max hysteresis is 3.6%. The results show that permittivity change plays an important part in the capacitance change.
