中国实用口腔科杂志

中国实用口腔科杂志

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不同时间酸蚀后年轻恒牙釉质表面形态扫描电镜观察研究

冶录平， 罗颂椒   

  1. 大连市口腔医院 大连大学附属口腔医院正畸科
  • 收稿日期:2008-06-04 修回日期:2008-07-30 出版日期:2008-08-15 发布日期:2008-08-15

  • Received:2008-06-04 Revised:2008-07-30 Online:2008-08-15 Published:2008-08-15

摘要：

目的 探讨正畸临床牙釉质的最佳酸处理时间。方法 从2005年大连市口腔医院外科门诊200颗正畸减数拔除的双尖牙中挑选出13颗作为样本，随机抽取其中3颗作为对照，未作酸处理。10颗进行酸处理的实验牙用约1 mm宽的蜡条沿牙冠颊轴嵴作分界线，蜡条覆盖部分作为对照区。扫描电镜下观察未酸蚀的对照牙、实验牙对照区和经过15 s和60 s酸蚀处理后的实验牙釉质表面形态。结果 镜下观察结果显示：酸蚀前釉质表面多较为光滑，似云片、积雪状外观;酸蚀后在小部分样本釉质表面中看到典型的蜂窝样和鹅卵石样形态。构成比显示60 s酸蚀组较15 s酸蚀组釉质丢失量多。结论 60 s酸蚀组较15 s酸蚀组釉质丢失更严重，为了尽可能地减少酸蚀粘接对牙釉质的损害，正畸临床可将酸蚀时间适当减少。

关键词: 牙釉质, 酸蚀, 扫描电镜, 正畸

Abstract:

The effects of different enemel etching time on young permanent teeth enamel surface： a scanning electron microscope study. YE Lu-ping*，LUO Song-jiao. *Department of Orthodontics， Stomatology Hospital of Dalian University， Dalian 116021， China.Abstract： Objective To investigate best etching time in orthodontic clinical treatment . Methods Select 13 healthy young premolors ，taking normal，15s and 60s etching enamel surface photomicrographs by SEM，then comparing their difference. Results The SEM photographs showed most of enamel surface was smooth， like a piece of cloud or snow before etching . After etching we found four different basic etch pattern，and only in few subjects there was the typical “honeycomb”or “cobblestone”appearance ，which might be related to the subject selection;the statistics showed 60s etching time caused more enamel loss than the 15s etching. Conclusion 60s etching has more enamel loss than 15s etching. We should properly reduce etching time in orthodontic clinic to decrease the enamel damage as much as possible

Key words: enamel surface, etching time, SEM, orthodontic