Dr Françoise Barbira Freedman has spent thirty years visiting and living with the Keshwa Lamas in Peru.
During one visit she was given a leaf of the Acmella Oleracea to chew to ease the pain of her wisdom teeth. The remedy was so effective she took a sample back to the UK for testing.
The plant has been turned into a gel for medical use which has the potential to replace anaesthetic injections in the dentist's chair.
The treatment has passed the first two clinical tests. If it is successful in stage three it could be used by UK dentists as early as 2014.