Painless Plasma Jets Could Replace Dental Drills

This could mean an end to fear and loathing at the dentist’s office. A new (allegedly) painless blowtorch-like device is being developed that uses a thin beam of plasma could kill oral bacteria in cavities. A plasma is an ionized gas—one in which some of the electrons are stripped away from their atoms.

The plasma kept the dentin, the fibrous bonelike material that makes up most of a tooth under the outer enamel layer, intact, while reducing bacteria 10,000-fold. This means that plasma jets could be used to wipe out the tooth-decaying bacteria in cavities–a procedure that normally requires the use of a painful dental drill to grind away the infected portion of tooth.

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