Keratinization of the gingivae.
D005881:Gingiva / Q000166:cytology*; D005882:Gingival Diseases / Q000473:pathology*; D006651:Histocytochemistry; D006801:Humans; D007633:Keratins / Q000032:analysis / Q000378:metabolism*; D009506:Nevus / Q000473:pathology*
D007633:Keratins