Therefore pit and fissure sealing on second molar can be used on the prevention of permanent dental caries.

因此，实现龋病预防三早，重视第二恒磨牙开展窝沟封闭具有实际意义。

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Therefore pit and fissure sealing on second molar can be used on the prevention of permanent dental caries.

因此，实现龋病预防三早，重视第二恒磨牙开展窝沟封闭具有实际意义。

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