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  • 12/22/2008

New Tooth Cavity Protection


Clarkson University Center for Advanced Materials Processing Professor Igor Sokolov and graduate student Ravi M. Gaikwad has discovered a new method of protecting teeth from cavities by ultrafine polishing with silica nanoparticles.

The researchers adopted polishing technology used in the semiconductor industry (chemical mechanical planarization) to polish the surface of human teeth down to nanoscale roughness.

Roughness left on the tooth after the polishing is just a few nanometers, which is one-billionth of a meter or about 100,000 times smaller than a grain of sand, Science Daily said.

Sokolov and Gaikwad showed that teeth polished in this way become too ’slippery’ for the ’bad’ bacteria that is responsible for the destruction of dental enamel. As a result the bacteria can be removed fairly easily before they cause damage to the enamel. Although silica particles have been used before for tooth polishing, polishing with nanosized particles has not been reported.

The researchers hypothesized that such polishing may protect tooth surfaces against the damage caused by cariogenic bacteria, because the bacteria can be removed easily from such polished surfaces.

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