Objective： This study explored the effects of different light curing modes and ethanol-wet bonding on dentin bonding strength and durability. Methods： A total of 54 molars were randomly divided into three groups： S...Objective： This study explored the effects of different light curing modes and ethanol-wet bonding on dentin bonding strength and durability. Methods： A total of 54 molars were randomly divided into three groups： Single Bond 2, Gluma Comfort Bond, and N-Bond. Based on the three light-curing modes and presence or absence of eth- anol pretreatment, the samples were assigned to six subgroups： high-light mode, ethanol pretreatment＋high-light mode, soft-start mode, ethanol pretreatment＋soft-start mode, standard mode, and ethanol pretreatment＋standard mode. All samples were bonded with resin based on the experimental groups. After 24 h and 6 months of water storage, a universal testing machine was used to measure microtensile bond strength. Scanning electron microscopy （SEM） was applied to observe mixed layer morphology. Results： The 24-h and 6-month microtensile bond strengths of the ethanol pretreatment groups were significantly higher than those of the non-ethanol pretreatment groups at the same light modes （P〈0.05）. With or without ethanol pretreatment, the microtensile bond strengths of the high-light modes were significantly lower than those of the soft-start modes and standard modes （P〈0.05）. The microtensile bond strengths of samples from the 6-month water storage group significantly decreased compared with those of samples from the 24-h water storage group （P〈0.05）. The soft-start groups and standard groups formed better mixed layers than the high-light mode groups, whereas the ethanol pretreatment groups formed more uniform mixed layers than those without ethanol pretreatment. Conclusions： Ethanol-wet bonding technique, soft-start, and standard modes could improve dentin bonding properties.展开更多
以乙醇为溶剂,乙酸锌为前驱物,聚乙烯吡咯烷酮为表面修饰剂,采用溶液化学法,制备了氧化锌纳米粒子。考察反应时间、聚乙烯吡咯烷酮加入量及含水量的影响。通过UV-Vis、FL和TEM等对ZnO纳米粒子进行表征。结果表明,在PVP-乙醇反应体系中加...以乙醇为溶剂,乙酸锌为前驱物,聚乙烯吡咯烷酮为表面修饰剂,采用溶液化学法,制备了氧化锌纳米粒子。考察反应时间、聚乙烯吡咯烷酮加入量及含水量的影响。通过UV-Vis、FL和TEM等对ZnO纳米粒子进行表征。结果表明,在PVP-乙醇反应体系中加入3 m L浓度33.4 mmol/L乙酸锌水溶液,3 m L水,0.5 g PVP,在80℃反应120 min时,制得氧化锌纳米粒子的效果较好,氧化锌纳米粒子呈规则的球形,具有较好的分散性,粒径约为200 nm,且具有较窄的尺寸分布,证明PVP对ZnO纳米粒子表面具有较好的修饰效果。展开更多
目的:评价水湿粘结和乙醇湿粘结操作技术对即刻粘结强度和粘结耐久性的影响。方法:利用乙醇湿粘结、水湿粘结技术和全酸蚀粘结系统Single Bond 2(SB)以及Prime Bond NT(PB)制备牙本质片粘结试件。微拉伸实验检测即刻粘结强度;并测试老...目的:评价水湿粘结和乙醇湿粘结操作技术对即刻粘结强度和粘结耐久性的影响。方法:利用乙醇湿粘结、水湿粘结技术和全酸蚀粘结系统Single Bond 2(SB)以及Prime Bond NT(PB)制备牙本质片粘结试件。微拉伸实验检测即刻粘结强度;并测试老化处理(100 g/L次氯酸钠液浸泡2 h)后的粘结强度,扫描电镜观察各组杂化层的微观形貌。每项实验用5个粘结试件。结果:与水湿粘结技术相比,乙醇湿粘结技术可获得与PB组相似(P>0.05)或者比SB组更高(P<0.05)的即刻粘结强度;老化处理后的粘结强度显著高于相应的水湿粘结组(SB组和PB组)(P<0.05);乙醇湿粘结试件的杂化层清晰完整、质地均一。结论:乙醇湿粘结技术可提高全酸蚀粘结剂的牙本质粘结强度和粘结耐久性,获得界限明确、质地均一的杂化层。展开更多
基金Project supported by the Science and Technology Research Project of the Education Department of Jilin Province of China(No.(2015)527)
文摘Objective： This study explored the effects of different light curing modes and ethanol-wet bonding on dentin bonding strength and durability. Methods： A total of 54 molars were randomly divided into three groups： Single Bond 2, Gluma Comfort Bond, and N-Bond. Based on the three light-curing modes and presence or absence of eth- anol pretreatment, the samples were assigned to six subgroups： high-light mode, ethanol pretreatment＋high-light mode, soft-start mode, ethanol pretreatment＋soft-start mode, standard mode, and ethanol pretreatment＋standard mode. All samples were bonded with resin based on the experimental groups. After 24 h and 6 months of water storage, a universal testing machine was used to measure microtensile bond strength. Scanning electron microscopy （SEM） was applied to observe mixed layer morphology. Results： The 24-h and 6-month microtensile bond strengths of the ethanol pretreatment groups were significantly higher than those of the non-ethanol pretreatment groups at the same light modes （P〈0.05）. With or without ethanol pretreatment, the microtensile bond strengths of the high-light modes were significantly lower than those of the soft-start modes and standard modes （P〈0.05）. The microtensile bond strengths of samples from the 6-month water storage group significantly decreased compared with those of samples from the 24-h water storage group （P〈0.05）. The soft-start groups and standard groups formed better mixed layers than the high-light mode groups, whereas the ethanol pretreatment groups formed more uniform mixed layers than those without ethanol pretreatment. Conclusions： Ethanol-wet bonding technique, soft-start, and standard modes could improve dentin bonding properties.
文摘以乙醇为溶剂,乙酸锌为前驱物,聚乙烯吡咯烷酮为表面修饰剂,采用溶液化学法,制备了氧化锌纳米粒子。考察反应时间、聚乙烯吡咯烷酮加入量及含水量的影响。通过UV-Vis、FL和TEM等对ZnO纳米粒子进行表征。结果表明,在PVP-乙醇反应体系中加入3 m L浓度33.4 mmol/L乙酸锌水溶液,3 m L水,0.5 g PVP,在80℃反应120 min时,制得氧化锌纳米粒子的效果较好,氧化锌纳米粒子呈规则的球形,具有较好的分散性,粒径约为200 nm,且具有较窄的尺寸分布,证明PVP对ZnO纳米粒子表面具有较好的修饰效果。
文摘目的:评价水湿粘结和乙醇湿粘结操作技术对即刻粘结强度和粘结耐久性的影响。方法:利用乙醇湿粘结、水湿粘结技术和全酸蚀粘结系统Single Bond 2(SB)以及Prime Bond NT(PB)制备牙本质片粘结试件。微拉伸实验检测即刻粘结强度;并测试老化处理(100 g/L次氯酸钠液浸泡2 h)后的粘结强度,扫描电镜观察各组杂化层的微观形貌。每项实验用5个粘结试件。结果:与水湿粘结技术相比,乙醇湿粘结技术可获得与PB组相似(P>0.05)或者比SB组更高(P<0.05)的即刻粘结强度;老化处理后的粘结强度显著高于相应的水湿粘结组(SB组和PB组)(P<0.05);乙醇湿粘结试件的杂化层清晰完整、质地均一。结论:乙醇湿粘结技术可提高全酸蚀粘结剂的牙本质粘结强度和粘结耐久性,获得界限明确、质地均一的杂化层。
