One doctor claims that sleep bruxism results in 250 lbs. of pressure on the tooth [source: NY Times].

一个医生声称睡觉时磨牙能施加250磅的压力到牙齿上。

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Do your want to have your tooth extracted, tooth filled, dressing changed, blood pressure checked?

你要拔牙（补牙，换药，量血压）吗？

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ScienceDaily (Sep. 6, 2009) - it's been a mystery: how can our teeth withstand such an enormous amount of pressure, over many years, when tooth enamel is only about as strong as glass?

科学日报(2009年9月6日)——当牙齿上的牙釉质大约只有玻璃般强硬时，我们的牙齿这么多年来是怎样经受住一个如此巨大的压力的？

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Symptoms of acute sinusitis include nasal congestion and obstruction, nasal discharge, tooth discomfort and facial pain or pressure that is worse when bending forward.

CNN: What can I do for my chronic sinusitis?