不同预备程序对基牙表面粗糙度的影响。
Effects of different preparation procedures on abutment surface roughness.
在实验室中扫描电镜下观察离体牙表面在药物的作用下的变化情况。
The histological changes on the surface of extracted teeth induced by the medical effects were observed under SEM.
电动及声波牙刷在清除牙菌斑和牙表面污渍方面，可能优于传统牙刷。
Both electric and sonic toothbrushes may be superior to traditional toothbrushes in removing plaque and surface stains on teeth.
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