Patches take sting out of canker sores

By Nathan Seppa, 15:56 PM April 15, 2008

Canker sores, painful ulcers that form inside the mouth, can be slow to heal. In the absence of a cure, people often resort to numbing agents and wait out the lesions.

A patch that dispenses licorice extract directly onto the sores lessens their duration and dramatically eases pain, a preliminary test shows. Inventor Jeffrey T. Haley, a biochemist at Orahealth Corp. in Bellevue, Wash., presented the findings at a meeting of the International Association for Dental Research (IADR) in New Orlea...

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