If baby teeth are lost prematurely, the permanent teeth may erupt malpositioned and require orthodontics later on.

如果婴儿过早的失去牙齿，恒牙可能会爆发式的错位长出而需要正畸。

youdao

Baby teeth won't fall out until your child's permanent teeth are ready to come in, beginning around age 6.

大概到6岁左右，宝宝的恒牙开始长出来，这时乳牙才会脱落。

youdao

That said, there's no evidence that pacifiers cause any permanent damage to baby teeth – they usually return to normal after a few pacifier-free months.

但是，并没有证据显示奶嘴会对宝宝牙齿造成永久性的伤害，一般情况下，在戒掉奶嘴几个月后宝宝牙齿就会恢复正常。

youdao

It could interfere with the correct development of permanent teeth.

VOA: special.2009.03.11

With the comfort of permanent agricultural settlements came uncomfortable new scourges such as intestinal parasites, bad teeth and the fouling of the water supply.

ECONOMIST: Food in history