title: Retention of oral microorganisms on conventional and resin-modified glass-ionomer cements.
abstract: Secondary caries are a worldwide public and socioeconomic problem. The placement of restorations can lead to the development of environmental conditions favorable to microbial colonization, especially on the tooth/restoration interface, which is a predisposing factor for secondary caries. The aim of this study was to evaluate microbial retention on conventional (Chelon-Fil and Vidrion R) and resin-modified (Vitremer and Fuji II LC) glass-ionomer cements, in situ, using a hybrid composite resin (Z100) as a control. Twelve volunteers wore Hawley appliances with specimens made of all tested filling materials for 7 days. The specimens were then removed from the appliances and transferred to tubes containing 2.0 ml of Ringer-PRAS. Microorganisms from the samples were inoculated onto blood agar and Mitis Salivarius Bacitracin agar and incubated under anaerobiosis (90% N2, 10% CO2), at 37 degrees C, for 10 and 2 days, respectively. The resin-modified glass-ionomer cements and the composite resin retained the same levels of microorganisms on their surfaces. The resin-modified glass-ionomers retained less mutans streptococci than the composite resin and conventional glass-ionomer cements. The conventional glass-ionomer cements retained less mutans streptococci than the composite resin, but that difference was not statistically significant.
authors.affiliation: School of Dentistry of Araçatuba-UNESP.
authors.forename: D
authors.initials: D
authors.lastname: Pedrini
authors.forename: E
authors.initials: E
authors.lastname: Gaetti-Jardim Júnior
authors.forename: A C
authors.initials: AC
authors.lastname: de Vasconcelos
mesh_terms: D000328:Adult; D001422:Bacterial Adhesion; D005899:Glass Ionomer Cements; D006801:Humans; D009055:Mouth / Q000382:microbiology; D019279:Resin Cements; D013295:Streptococcus mutans / Q000502:physiology*
chemical_list: D005899:Glass Ionomer Cements; D019279:Resin Cements