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The smear layer is produced simultaneously when the tooth hard tissue is cut mechanically.
玷污层是牙体切割过程中的必然产物。
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；
The smear layer on enamel and dentin could be removed after conditioned by both phosphoric acid and pulse Nd:YAG laser.
电镜显示，磷酸酸蚀和激光照射，均可去除牙釉质和牙本质表面的玷污层。
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