玷污层是在切削牙体组织时所产生的热使有机质变性，变性的有机质和切削下来的牙质粉末与牙本质小管溢出液，唾液和细菌等掺和，在钻磨压力作用下使之贴附于洞壁形成的。牙本质的有机质的含量较釉质高，故切削牙本质形成的玷污层较釉质厚。玷污层可进入牙本质小管形成管塞。用一般的冲洗方法不能除去。玷污层的存在会妨碍修复体与洞壁的密合性。同时，由于玷污层的表面自由能低，是亲水的，不利于粘接剂在牙面的润湿和渗入，从而影响粘接。
玷污层
双语例句原声例句
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玷污层是牙体切割过程中的必然产物。
The smear layer is produced simultaneously when the tooth hard tissue is cut mechanically.
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第3组虽然能有效去除玷污层，但会引起牙本质小管中度腐蚀。
Although irrigants of group 3 could remove smear layer effectively, it resulted in moderate erosion of dentinal tubules.
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传统车针组的牙本质表面有不规则的颗粒和碎片，有玷污层形成。
Result: The cavity surface of the drilling group appeared rougher with irregular particles scattered throughout the surface area.
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These are spelled out in Leviticus 18 and Leviticus 20, those two chapters. Besides defiling the sinner, moral impurity symbolically defiles various sancta, especially the sanctuary, but also God's name and also the Holy Land itself.
这些都在《利未记》十八章和二十章里讲清楚了，除了玷污人使人变得有罪，道德上的不洁从象征意义上玷污了各层圣所，尤其是最外面那层圣所，同时也玷污了上帝的名字,和“圣地“这个名字。
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