title: The ultrastructure of the gingival epithelium in smokers' melanosis.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005881:Gingiva / Q000166:cytology / Q000648:ultrastructure*; D006801:Humans; D007633:Keratins; D008297:Male; D008544:Melanocytes / Q000648:ultrastructure; D008548:Melanosis / Q000473:pathology*; D008854:Microscopy, Electron; D008875:Middle Aged; D009059:Mouth Diseases / Q000473:pathology*; D012907:Smoking
chemical_list: D007633:Keratins