MTT colorimetric assay revealed experimental groups elevated OD value compared with control groups(P< 0.05).

药物组OD值明显高于对照组（P<0.05），而且有一定的血清浓度依赖性。

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Results The four toothpastes reduced the QH, SBI and AID(P<0.05), but there was no significant difference between in AL, PD and OD(P>0.05)among the groups.

结果四种牙膏均可使QH菌斑指数、出血指数和阿米巴感染度下降（P<0.05），而探诊深度、附着水平和牙松动度无统计学差异（P>0.05）。

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Results The four toothpastes reduced the QH, SBI and AID(P<0.05), but there was no significant difference between in AL, PD and OD(P>0.05)among the groups.

结果四种牙膏均可使QH菌斑指数、出血指数和阿米巴感染度下降（P<0.05），而探诊深度、附着水平和牙松动度无统计学差异（P>0.05）。

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