Premium
Iron staining of the acquired enamel pellicle after exposure to tannic acid or chlorhexidine: preliminary report
Author(s) -
NORDBÖ HAKON,
ERIKSEN HARALD M.,
RÖLLA GUNNAR,
ATTRAMADAL AUDUN,
SOLHEIM HALVOR
Publication year - 1982
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1982.tb01533.x
Subject(s) - tannic acid , enamel paint , chlorhexidine , chemistry , tannin , tooth discoloration , dentistry , staining , stain , pigment , food science , nuclear chemistry , organic chemistry , medicine , pathology
– Extrinsic discoloration of teeth following a large consumption of tannin‐containing beverages or a prolonged use of chlorhexidine mouthrinses is a well known observation. Tannins as well as chlorhexidine are denaturing agents. Based on preliminary studies revealing the presence of iron in chlorhexidine discolored pellicle material, the ability of iron to stain the integument after pretreatmentwith the two denaturants was studied in a human model. The denaturing effect of an acidic environment was also included. Enamel slabs fixedto acrylie appliances were carried in the oral cavity and alternately exposed to the test solutions in different sequences in vitro. Pretreatment with chlorhexidine or tannic acid led to marked discolorations upon iron application during 5‐d tests, whereas the compounds individually had no such effect. A large content of the metal was found in the stained material. Stannous fluoride appeared to reduce the formation of the pigments, and strong oxidation completely bleached the established color. Possible mechanisms underlying the phenomena observed are discussed.