Although irrigants of group 3 could remove smear layer effectively, it resulted in moderate erosion of dentinal tubules.
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。
The results showed that aqueous extract from Chinese nutgall can remove the smear layer without enlarged orifices.
结果表明五倍子有去除玷污层的作用，且不会过度侵蚀牙本质小管；
Studies have shown that tannic acid can remove the smear layer, but it has not yet been used in clinical root canal treatment.
有研究发现：鞣酸有去除玷污层的作用，但在根管治疗中的应用尚无进一步研究。
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