Carbide bar for dental rotary instrument
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United States of America Patent
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Issued Date -
Sep 30, 2010
app pub date -
Dec 24, 2009
filing date -
Dec 27, 2008
priority date (Note) -
Abandoned
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Abstract
This invention discloses a carbide bar for a dental rotary instrument which eliminates defects of the prior art. In the prior art, blades of the carbide bar are twisting on to rightward from a bottom to a top portion and this twisting offers some inconvenience such as detaching connection between hand piece and the bar during rotation work and stacking of cutting dusts for ill efficiency. This invention has now developed a new method for the blades, which should be twisted leftward from the bottom to the top to clear the submitted inconvenience.
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