The effect of the sclerotic dentin repaired with composite resin can be affected by the quality and quantity of hybrid layers and resin tags, and different etching systems and acid etching time.
混合层和树脂突的质和量以及不同的酸蚀系统和酸蚀时间都会影响硬化牙本质的复合树脂黏结修复效果。
Objective:To investigate the appearance of enamel on the cross section of tooth after etched with 37% phosphoric acid for different etching time .
目的：观察用37%磷酸凝胶以不同酸蚀时间处理后的牙釉质在牙齿横断面上的形态改变。
The effects of potassium dichromate concentration, sulfuric acid concentration, etching temperature and etching time on the bulk etching rate of PP nuclear track membrane were discussed.
建立了基体蚀刻速率与重铬酸钾浓度、硫酸浓度、蚀刻温度的数学关联式；
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