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Toothache牙痛

Toothache is pain in the area of the jaw and face.牙痛是痛苦在该地区的下巴和脸部。 It is usually caused by a problem with a tooth.这是通常所造成的问题与牙齿。 However, other problems in the mouth can also cause similar symptoms.不过，其他的问题，在口，也可以造成类似的症状。

In the middle of every tooth, there is space containing dental pulp.在中东的每一个齿，有空间载有牙髓。 Dental pulp is a soft, spongy tissue containing lots of sensitive nerves and blood vessels.牙髓是一种软，海绵组织含有大量的敏感的神经和血管。 The pulp cavity is surrounded with layers of hard tissue to protect it.牙髓腔所包围，与层的硬组织，以保护它。 The outermost layer is called enamel, and is harder than bone.最外层层是所谓的牙釉质，并努力比骨。

Toothache happens when the pulp inside the tooth gets inflamed (pulpitis).牙痛时发生的纸浆内的牙齿得到发炎（牙髓炎） 。 This can be caused by a number of things, but the most common is dental decay (carries).这可引起了一些东西，但最常见的是牙科衰变（进行） 。 Dental decay is when bacteria in the mouth break down the enamel of a tooth.牙科衰变是，当细菌在口腔打破珐琅一个齿。 Holes (cavities) in the tooth develop and expose the nerves underneath.孔（腔）在牙齿发展和暴露的神经底下。 You may have toothache when you eat or drink something very hot or cold, because it touches the nerves in the pulp.你可能有牙痛，当你吃或喝的东西非常热或冷，因为它触及神经的纸浆。