January 25, 2007

TOOTH ODOMETER (May, 1959)

Filed under: Medical — @ 11:59 am
Source: Popular Science ( More articles from this issue )
Issue: May, 1959
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TOOTH ODOMETER. The distance a tooth will move in your head is measured by this instrument. It was designed by researchers for health studies. It spots movement of one 200-millionth of an inch.

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