Er:YAG激光预备对牙釉质表面性能及树脂粘结强度的影响
发布时间：2018-09-11 12:45
【摘要】：目的:探讨Er:YAG激光预备对牙釉质表面性能及树脂粘结强度的影响。方法:选取50颗无龋坏、无充填物的人离体前磨牙或磨牙,用涡轮手机按近远中方向将离体牙切割成颊/舌两部分,最终选取84个样件,按不同的表面处理方法随机分为7组(A-G组),每组12个样件。每组2个样件扫描电镜观察,其余10个样件分别在处理后的牙釉质表面粘结光固化复合树脂,进行剪切强度测试。结果:A组剪切强度最高(20.51±3.33)MPa。B、C、D组剪切强度次之,与A组比差异无统计学意义。E、F、G组剪切强度较弱,其中E组剪切强度与B、C、D组无显著差异,F、G组与其他组有显著差异。扫描电镜观察:随着激光能量的增加,牙釉质表面粗糙度增加。激光处理后再进行酸蚀处理,牙釉质表面整体结构均匀,釉柱结构清晰可见,无玷污层。结论:Er:YAG激光处理牙釉质表面不能达到类似酸蚀的效果。激光加酸蚀能达到类似酸蚀的效果。牙釉质剪切粘结强度随着激光能量的增加而增加。
[Abstract]:Objective: to investigate the effect of Er:YAG laser preparation on enamel surface properties and resin bonding strength. Methods: 50 undecayed and filling free premolars or molars were selected. The extracted teeth were cut into buccal and tongue parts by turbine cell phone, and 84 samples were selected. According to different surface treatment methods, 7 groups (group A-G) were randomly divided into 7 groups with 12 samples in each group. Two samples of each group were observed by scanning electron microscope, and the other 10 samples were bonded with light-cured composite resin on the surface of enamel after treatment, and the shear strength was tested. Results the shear strength of group A was the highest in group A (20.51 卤3.33). There was no significant difference between group A and group A. the shear strength of group E was weaker than that of group A. there was no significant difference in shear strength between group E and group D. There was a significant difference between group E and other groups. SEM observation: with the increase of laser energy, the surface roughness of enamel increased. After laser treatment, the enamel surface was uniform, the enamel post structure was clearly visible, and there was no smear layer. Conclusion the treatment of enamel surface by W: er: YAG laser can not achieve the similar effect of acid etching. The effect of laser acid-etching is similar to that of acid-etching. The shear bond strength of enamel increases with the increase of laser energy.
【作者单位】： 南京大学医学院附属口腔医院南京市口腔医院;
【基金】：国家自然基金协作项目(编号:2014-27-280)
【分类号】：R783.1
，
本文编号：2236727
[Abstract]:Objective: to investigate the effect of Er:YAG laser preparation on enamel surface properties and resin bonding strength. Methods: 50 undecayed and filling free premolars or molars were selected. The extracted teeth were cut into buccal and tongue parts by turbine cell phone, and 84 samples were selected. According to different surface treatment methods, 7 groups (group A-G) were randomly divided into 7 groups with 12 samples in each group. Two samples of each group were observed by scanning electron microscope, and the other 10 samples were bonded with light-cured composite resin on the surface of enamel after treatment, and the shear strength was tested. Results the shear strength of group A was the highest in group A (20.51 卤3.33). There was no significant difference between group A and group A. the shear strength of group E was weaker than that of group A. there was no significant difference in shear strength between group E and group D. There was a significant difference between group E and other groups. SEM observation: with the increase of laser energy, the surface roughness of enamel increased. After laser treatment, the enamel surface was uniform, the enamel post structure was clearly visible, and there was no smear layer. Conclusion the treatment of enamel surface by W: er: YAG laser can not achieve the similar effect of acid etching. The effect of laser acid-etching is similar to that of acid-etching. The shear bond strength of enamel increases with the increase of laser energy.
【作者单位】： 南京大学医学院附属口腔医院南京市口腔医院;
【基金】：国家自然基金协作项目(编号:2014-27-280)
【分类号】：R783.1
，
本文编号：2236727
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