<unk>  is a condition characterized by chronic irritation or injury to the buccal mucosa (the lining of the inside of the cheek within the mouth), caused by repetitive chewing, biting or nibbling.
Morsicatio buccarum
Visceroptosis
Oral galvanism
Cimex hemipterus
Trichostasis spinulosa
Dens evaginatus
Crepitus
Status marmoratus