敏感性牙齿是什么？
When you eat or drink hot or cold drinks, and you feel sharp, short, and shooting pain, you are probably having sensitive teeth!
Sensitive teeth is a very common problem. Believe it or not, in every 5 adults, 2 of them have sensitive teeth problem!
敏感性牙齿问题是很常见的牙齿问题之一。你相信吗，每5个人当中就有2个人有敏感性牙齿问题哦！
2. How is Sensitive teeth happened?
敏感性牙齿是如何发生的呢？
我们的牙齿结构有，牙齿珐琅质（ENAMEL） ，牙本质（DENTINE），牙髓（PULP）。牙齿珐琅质是最外层的结构，它非常的硬及有着保护牙齿内部的功能。牙本质是造成牙齿敏感的主要结构。牙本质里含有无数充满牙本质液体的小管子，这些小管子都直接的与我们的牙髓里的牙神经接触，所以是敏感牙齿的导源。牙髓里有牙神经及血管。他扮演者提供牙齿养分及感觉的角色。。When your dentine is exposed, stimulus like cold, hot, touching will be transmitted through the fluids in the dentinal tubules to the Pulp, and you will be pain/ sensitive.
当你牙齿的牙本质被曝露时，刺激物如冷，热，触感将会通过牙本质里的小管传至牙髓里的牙神经，然后就会感到酸痛及刺痛的感觉。这就是敏感性牙齿的产生。
3. Why Dentine become exposed?
我们的牙本质为何会曝露？
Here are few reasons why our dentine become exposed.
The main reason is the protecting layer (ENAMEL) has worn away. Reasons of enamel wear off :我们的牙本质为何会曝露？
Here are few reasons why our dentine become exposed.
我们的牙本质会曝露出来其实有几个原因。
最主要的是因为牙齿的保护层（牙齿珐琅质-ENAMEL）被破坏了。牙齿珐琅质遭到破坏的例子有：
a. Decay,
蛀牙
b. Fracture teeth due to fall/ accident, Crack teeth.
牙齿断裂（牙齿因为跌倒/撞击断裂），牙齿龟裂。
牙齿磨损，牙齿因为咬牙/磨牙习惯，年纪增长被磨损,
d. Abrasion due to hard and wrong brushing habit.
牙齿磨损因为使用硬毛牙刷，太用力刷牙，及错误的刷牙方式造成磨损
- 碎裂（Abfraction=Breakaway）在咬合负荷下，由于牙尖桡曲造成拉应力集中在牙颈部，当牙釉质与牙本质羟基磷灰石结晶联接断裂，进而产生微裂。
牙齿侵蚀，牙齿因为经常饮用酸性饮料及经常呕吐而被酸性侵蚀。
Another common reason is gum recession. Our dentine are not covered by enamel at the neck and root of the teeth, when the gum receding the dentine will be exposed.
另一个普遍的原因是牙龈萎缩。我们的牙本质在牙颈及牙根的部分是没有珐琅质保护的，所以当我们的牙龈萎缩时，就会造成牙本质曝露。
Post dental treatment such as Scaling, Fillings, and Whitening may cause some degree of teeth sensitivity. But this normally disappear after few days. If the problems persist, you may need to see your dentist.
另外，一些牙科疗程比如洗牙，补牙及美白牙齿后，都有可能会造成牙齿敏感。但这些都只是短暂的。如果敏感的问题一直持续不断，那您就需要看牙医咯。
4. How to overcome Sensitive teeth pain?
我有敏感性牙齿，怎么办？
上门看牙医
To treat the sensitive problem, first you need to see your dentist!
要解决敏感性牙齿问题，首先你需要见牙医！
改掉坏习惯
If you have habits of grinding, frequent drink of acidic drink or soda, brushing hard or brush with wrong technique, all these need to be corrected.
如果你有磨牙习惯，常喝酸性的水或汽水及刷牙用力太大或错的方法（横着刷），这些都需要改掉。
补牙
Problems of enamel wear off need to be treated with fillings to cover the expose dentine.
如果你的敏感是因为牙齿珐琅质被磨顺，侵蚀或蛀牙，那你就可能需要牙医补牙以覆盖已曝露的牙本质
牙齿脱敏法
Desensitize therapy is conservative treatment use to reduce sensitive. It can be done in Office (by dentist) or at home. Desensitization aims to close/seal off the dentine tubules, so that the stimulus is blocked from passing through it.
牙齿脱敏疗法是一种保守及不具伤害的减轻敏感牙齿的疗法。这种疗法可以在诊疗所里由牙医治疗，或在家疗法。牙齿脱敏法是要将牙本质小管封闭，不让它直接与刺激物接触，而减少敏感的发作。
For in office treatment, Fluoride varnish is applied on the sensitive tooth in order to remineralize the tooth, and seal off the exposed dentinal tubules.
For at home treatment, you need to apply the desensitizing agent over the sensitive tooth. The sensitive toothpaste selling in the market are one of the desensitizing agent.You may need to try different products to find out the product which works to you. The other type of desensitizing agent is Tooth mousse, however this is not easy to find in the market, you may ask your dentist if they are selling it. Desensitizing may take times to get the result, if this treatment doesn't work, you may need to see your dentist.牙医疗法是在敏感牙齿涂上一层氟化物涂膜 (fluoride varnish), 氟化物能使牙齿在矿化，然后修补曝露的牙本质。居家疗法是你在家里用牙齿脱敏物涂在敏感的牙齿上。市场上所卖的抗敏感性牙膏都有帮助脱敏的功效。但是，你可能需要尝试不同的品牌，才能找到适合你的品牌。另外一种脱敏剂是慕斯牙膏(tooth mousse)。慕斯牙膏不能在市场上找到，如果你想要购买，可以向你的牙医询问。
牙齿脱敏法是一个需要长时间的疗法，效果不能在短时间内看到。但是尝试了一段时间后还是没有任何改善，那你可能需要看看牙医咯。
