title: An evaluation of a glass ionomer luting agent: bacterial leakage.
abstract: This study quantitatively evaluates the bacterial leakage beneath crowns cemented with a glass ionomer cement compared with those cemented with a polycarboxylate cement or a varnish plus zinc phosphate cement. Bacterial samples were taken from beneath full crowns cemented with the test luting agents 3, 10, and 56 days after cementation. Two-way analysis of variance of the resultant data showed a significant increase in bacterial counts for zinc phosphate, a significant decrease for polycarboxylate, and no change for glass ionomer. These findings suggest that bacterial leakage may not be the reason for the reported poor clinical response associated with glass ionomer luting agents.
mesh_terms: D001419:Bacteria / Q000302:isolation & purification; D003442:Crowns; D003736:Dental Cavity Lining; D003738:Dental Cements; D003763:Dental Leakage / Q000382:microbiology* / Q000517:prevention & control; D005899:Glass Ionomer Cements; D006801:Humans; D011076:Polycarboxylate Cement; D015036:Zinc Phosphate Cement
chemical_list: D003738:Dental Cements; D005899:Glass Ionomer Cements; D011076:Polycarboxylate Cement; D015036:Zinc Phosphate Cement