Chronic biting or chewing of tissue of the oral cavity can result in lesions termed morsicatio (from the Latin morsus = "to bite". It is classified as a chronic oral frictional keratosis.
Features:
(1) history of chronic biting of the target tissue
(2) white lesion of target tissue
(3) chronic irritation with epithelial hyperplasia and parakeratosis
(4) exclusion of other causes of hyperkeratosis and of infection (fungal, viral, bacterial)
Term
Target
morsicatiobuccarum
buccal mucosa
morsicatiolabiorum
lip
morsicatiolinguarum
tongue
morsicatio mucosae oris
oral mucosa
Risk factors:
(1) stress
(2) psychological disorder
(3) oral neuropathy
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