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如何挑选牙膏

抗敏感、美白、防蛀、除口臭,坊间牙膏种类多元,每个产品标榜的效果不尽相同,不知道该选哪一种?
最好选择含氟牙膏!每天用含氟牙膏刷牙两次,患龋齿的危险性降低40%。但对于牙齿健康的人来说,也不是必然的选择,青少年和老年人可以多用。但学龄前儿童要慎用,以免不小心吞咽牙膏,可能引起氟摄取过量。
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智齿一定得拔吗?

要谈智齿该不该拔的问题前,先来瞭解一下究竟智齿究竟是什么。从医学上来看,智齿又叫「第三大臼齿」,就是从上下腭牙齿的中心点,也就是正中门牙牙缝间隙开始算起的第8颗牙, 智齿是人类32颗恒牙当中最后长出的恒牙,位于上下左右牙弓的最后方,是口腔中最靠近喉咙的牙齿。因为在智齿长出的时间大多会在16到24岁左右,是人类心智渐趋成熟,也较有智慧的时候,所以又有「智慧之齿」之称。

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