Frictional keratosis is a white, keratotic lesion due to chronic mechanical irritation caused by sharp edges of teeth or restorations, dental prosthesis, abrasive foods, vigorous tooth brushing, and playing wind instruments. Alveolar ridge keratosis is a frictional keratosis located on the edentulous alveolar ridge and/or retromolar pad. Morsicatio mucosae oris is a form of chronic oral frictional keratosis of the nonkeratinized oral mucosa, usually located on the buccal mucosa or lips.
Frictional keratosis presents as diffuse, white plaques, pale-translucent to dense, white, and irregular.
Frictional keratosis is a common oral lesion due to trauma.
No age predilection.
No sex predilection.
Frictional keratosis occurs in areas that are commonly traumatized, such as the buccal mucosa (along the occlusal line), lips, lateral margins of the tongue, and edentulous alveolar ridges.