在某个之间ages 17 and 21，大多数成年人将发展他们的第三组臼齿。这些臼齿更常见于智齿。
牙齿are categorized by their placement and function. The sharper teeth can tear food into smaller pieces and the flatter teeth grind food down. Wisdom teeth are the flatter kind of teeth, called molars. Molars are all the way in the back of your mouth. Adults get three sets of molars on top and bottom, and on both sides of the mouth.
从婴儿期通过早期的青春期，人类开发了他们的第一组牙齿，失去了它们，再次获得全新的套装。有一个简短的暂停，然后再次，成年早期，最后一套牙齿出现。
他们被称为智齿牙齿，因为它们是最突出的牙齿。当这些牙齿进来时，你可能会“更明智”。
All of the teeth a person will ever have are present at birth, higher up in the skull structure. First, a set of 20 baby teeth erupts and falls out. Then 32 permanent teeth grow in. The firstset of molars通常在6岁时可见，第二次设置在12岁左右12岁，并在21岁之前的某个时间（智齿）。
Once essential for an early human diet of roots, leaves, meat, and nuts, wisdom teeth are no longer totally necessary. Today, humans cook food to soften it, and we can cut and crush it with utensils.
人类学家认为人类已经进化到了需要智齿的牙齿，所以有些人可能永远不会得到任何。智齿可能会达到附录的方式，变得完全不必要。一些研究人员如果有一天没有人再有智齿了，那就不再令人惊讶了。
Still, genetics do cause most adults to develop their wisdom teeth.
但是，只要你看不到你的所有智齿并不意味着他们不在那里。有时智齿牙齿永远不会爆发，不会变得可见。X射线可以确认您是否在牙龈下有智齿。
Whether visible or not, wisdom teeth can cause oral health problems. Wisdom teeth that haven’t erupted through the gums are calledimpacted。Sometimes this causes even more problems than visible wisdom teeth.
Humans and our jaws have gotten smaller over time. There are probably a few reasons for this evolutionary progress. Some scientists believe that as the human brain grew bigger over time, the jaw got smaller to accommodate for space.
我们的饮食和牙科需求也发生了巨大的变化。较小的下巴意味着嘴里的房间里没有足够的房间，因为我们应该拥有所有的牙齿。总共有四个智齿，两颗在顶部两个，底部两个。人们可以从没有四个中有任何数量的智齿。
Most jaws are完成生长当一个人18岁的时候，但是当一个人在周围时，大多数智慧都会出现19.5岁。智齿牙齿引起的大多数问题都是由于它们只是不适合的事实。
与智齿相关的问题包括：
- 弯曲的牙齿
- 拥挤的牙齿
- 在侧身生长的智齿牙齿
- increasedtooth decay
- jaw pain
- 牙龈下囊肿和可能肿瘤
The美国牙科协会如果上述任何变化是明显的，则表明将需要清除。
It’s recommended that teenagers be evaluated for智齿去除手术。People who get their wisdom teeth removed at a younger age tend to heal better from surgery, before the roots and bone have fully formed. This can help avoid any potential problems before they start.
There are always risks associated with surgery so be sure to ask a lot of questions when you’re deciding whether or not to have these teeth removed. If you decide not to have your wisdom teeth removed, they need to be monitored closely by your dentist. Wisdom teeth tend to become more problematic over time.
Sometimes dentists will recommend wisdom tooth removal before any orthodontic work, like braces, to ensure that these teeth don’t erupt later and undo all the hard work of shaping your jaw and teeth.
Either a professional dentist or oral and maxillofacial surgeon can remove your wisdom teeth. They’ll give you clear instructions on how to prepare for surgery and what to do during recovery.