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...increasing use as a catalyst in the making of chlorine and caustic soda for the expanding chemical, paper and plastics industries. A corrosive poison in some forms (mercury bichloride), a therapeutic salve in others (mercury ammonium chloride), fickle mercury also goes in hefty quantities into such disparate products as dental fillings and dry-cell batteries, antibarnacle paint and electrical control apparatus. Hatmakers, however, have ceased using the stuff to soften felt. Reason: poisoned by mercury vapor, almost one U.S. hatter in ten developed shakes and mental disturbances. The resulting cliche, mad as a hatter, survives...

Author: /time Magazine | Title: Commodities: Quotations in Quicksilver | 1/27/1967 | See Source »

School of Dental Medicine...

Author: NO WRITER ATTRIBUTED | Title: University's Capital Needs: A Neat Bundle of Fund Campaigns Totalling $160 Million | 1/27/1967 | See Source »

...called wisdom teeth, or third molars, which generally erupt around the end of adolescence. And the catalogue of troubles that have been traced to impacted wisdom teeth is virtually endless. At one time or another, New York University's Dr. Irving Salman told the Greater New York Dental Meeting last week, they have been accused of causing everything from facial deformity to infections, from cysts to neuralgia, nervous disorders, muscular twitching, melancholia, arthritis, impairment of vision-and even schizophrenia...

Author: /time Magazine | Title: Dentistry: Wisdom of the Third Molar | 12/16/1966 | See Source »

...case, said Oral-Surgeon Salman, third molars are so often troublesome* that some dental authorities believe they should be removed routinely as a preventive measure. One school even proposes extraction before the teeth are fully formed, on the ground that a growing third molar may press against a second molar's roots hard enough to cause damage. Dr. Salman prefers to leave wisdom teeth in place until the facial bones are fully grown, usually between the ages of 16 and 18. Lower third molars, he said, even though they seem to be pushing through at an angle, have...

Author: /time Magazine | Title: Dentistry: Wisdom of the Third Molar | 12/16/1966 | See Source »

After the wisdoms, the teeth most likely to become impacted are the canines, which may be trapped between the incisors and the bicuspids (the double-pointed teeth immediately behind them). The canines are so important to both the shape and function of the jaws that the dental surgeon should do his utmost to help them achieve their normal position. Only if that is impossible should canines be extracted. Even when an impacted tooth is clearly infected, there is still disagreement as to when it ought to come out. Should the dentist wait for the infection to be healed by antibiotics...

Author: /time Magazine | Title: Dentistry: Wisdom of the Third Molar | 12/16/1966 | See Source »

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