How is frictional keratosis differentiated from hairy leukoplakia?

Updated: Aug 05, 2019
  • Author: James E Cade, DDS; Chief Editor: Jeff Burgess, DDS, MSD  more...
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Frictional keratosis typically occurs on the lateral borders of the tongue as a consequence of tongue biting by the molar teeth or some other abrasive irritant (eg, from rubbing upon poorly fitting dental work), as shown in the image below. This lesion should quickly resolve after removal of the provoking stimulus.

Morsicatio linguarum, or tongue biting. Morsicatio linguarum, or tongue biting.

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