Anorexia, bulimia, and other eating disorders can also cause serious nutritional shortfalls that can affect the health of your teeth.

厌食症、暴食症和其他进食紊乱症都可导致严重的营养不足从而影响你的牙齿健康。

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The exact cause of teeth grinding is not known, but the most likely culprits are things like stress, sleep disorders, crooked or missing teeth and having an abnormal bite, where the upper and lower teeth do not come together normally (known as malocclusion).

CNN: What can I do about teeth grinding?