Er:YAG激光处理对牙本质与树脂粘结强度的影响

发布时间：2018-01-29 17:20

本文关键词： Er YAG 激光酸蚀牙本质剪切粘结强度　出处：《口腔医学研究》2017年06期 　论文类型：期刊论文

【摘要】：目的:探讨Er:YAG激光处理对牙本质表面性能及树脂粘结强度的影响。方法:选取30颗无龋坏、无修复体的人离体磨牙,用高速涡轮手机在流水冲洗下磨除釉质层。每个牙冠以髓腔为中心沿近远中向切开成颊/舌两部分,最终选取50个样件,按不同的表面处理方法随机分为5组(A~E组),每组10个样件。每组2个样件扫描电镜观察,其余8个样件分别在处理后的牙本质表面粘结光固化复合树脂,进行剪切强度测试。结果:C组最高,为(7.11±1.73)MPa,E组次之,E组与A、C、D组无统计学差异,B组较低,其中B组与C、D、E组均有统计学差异。扫描电镜观察:酸蚀组可见部分牙本质小管口开放,管径未增大;管周牙本质与管间牙本质界限不明显。激光+酸蚀组可见牙本质表面清沽,牙本质小管开放,周围白晕环绕。激光组可见牙本质表面清洁、粗糙,无玷污层,呈片状、蜂窝状外观,管周牙本质与管间牙本质界限清晰。结论:Er:YAG激光处理能增加牙本质与树脂的剪切粘结强度,但是合适的能量参数有待进一步研究。
[Abstract]:Objective: to investigate the effect of Er:YAG laser treatment on the surface properties of dentin and the adhesive strength of resin. Methods: 30 human molars without dental caries and prostheses were selected. The enamel layer was flushed by income with a high speed turbine cell phone. Each crown was cut into cheek / tongue at the center of the pulp cavity, and 50 samples were selected. According to different surface treatment methods, we were randomly divided into 5 groups, 10 samples in each group, and 2 samples in each group were observed by scanning electron microscope. The other 8 samples were treated with light-cured composite resin on the dentin surface respectively, and the shear strength was measured. Results the highest in group C was 7.11 卤1.73 MPA / E, the second was in group E. There was no significant difference between group E and group A (P < 0.05), but there was no significant difference between group B and group C. scanning electron microscope (SEM) showed that the orifice of dentine tubules was open in acid etching group, and the diameter of tubules did not increase. The boundary between the periodontal dentin and the intertube dentin was not obvious. In the laser etching group, the dentin surface was sold, the dentine tubules were open, and the white halos were surrounded. In the laser group, the dentin surface was clean, rough, and there was no smear layer. The boundary between the periodontal dentin and the intertube dentin is clear. Conclusion the shear bond strength between the dentine and resin can be increased by the treatment of er: YAG laser. However, the appropriate energy parameters need to be further studied.
【作者单位】：南京大学医学院附属口腔医院南京市口腔医院修复科;盐城市口腔医院;
【基金】：南京航空航天大学国家自然基金协作费(编号:2014-27-280)
【分类号】：R783.1
【正文快照】： 牙釉质的平均厚度为2 mm,临床上接触到的牙齿常常会有龋坏、牙体缺损等,釉质破坏比较多,暴露牙本质面,修复处理时常需进行牙本质粘接。1955年Buonocore[1]首次将酸蚀技术应用于牙体粘结,自此粘结修复技术和材料迅速发展。牙本质粘结技术近些年也取得了飞速发展,使得牙本质粘

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