Incidence of stained tooth surfaces in students using chlorhexidine-containing dentifrices.
D001645:Biguanides / Q000009:adverse effects*; D003069:Coffee; D003802:Dentifrices / Q000009:adverse effects*; D006801:Humans; D007180:Incisor / Q000032:analysis; D008334:Mandible; D010919:Placebos; D012907:Smoking; D013662:Tea; D013997:Time Factors; D014075:Tooth Discoloration / Q000139:chemically induced*
D001645:Biguanides; D003069:Coffee; D003802:Dentifrices; D010919:Placebos; D013662:Tea