"One of the ways you can tell that is how your upper teeth fit to the lower teeth, " Papay said.

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Sinusitis is inflammation of the nasal cavity and the sinuses, which are air-filled spaces located primarily in the jaw above the upper teeth and in the forehead around the eyes.

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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).

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The son was taken to a hospital with head injuries, a split upper lip and several teeth knocked out of place, the Orange County Sheriff's Office said in a report.

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Mr. OWEN: The teeth, the lips, the soft palette, the upper palette, your gums, the structure of your jaw, all these things predicate how you're going to speak.

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Not good on sunburns, and the same goes for the Thai Massage: When the therapist complimented my flexibility while digging her knees into my upper musculature, my "thank you" came through tears and gritted teeth.

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But he cut his political teeth in the PRI, which he left reluctantly in 1988 when free-market technocrats gained the upper hand in the party which ruled Mexico for seven decades until Vicente Fox's election victory of 2000.

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