title: The effect of polishing systems on microleakage of tooth coloured restoratives: Part 1. Conventional and resin-modified glass-ionomer cements.
abstract: The purpose of this in vitro study was to investigate the effect of polishing systems on the microleakage of conventional and resin-modified glass-ionomer cements. Class V cavities were prepared at the cemento-enamel junction of 80 freshly extracted posterior teeth. The prepared teeth were randomly divided into two groups and restored with conventional or resin-modified glass-ionomer cements. The restored teeth were stored in distilled water at 37 degrees C for 1 week after removal of excess restorative with diamond finishing burs. The restored teeth were then divided into four groups of 10 and finished and polished using the following systems: Two Striper MFS; Sof-Lex XT; Enhance Composite Finishing and Polishing System; Shofu Composite Finishing Kit. The finished restorations were subjected to dye penetration testing. Results showed that the microleakage at dentin margins of conventional glass-ionomer cements and enamel margins of resin-modified glass-ionomer cements are significantly affected by the different polishing systems.
authors.affiliation: Faculty of Dentistry, National University of Singapore, Singapore. rsdyapuj@nus.edu.sg
authors.forename: A U
authors.initials: AU
authors.lastname: Yap
authors.forename: S
authors.initials: S
authors.lastname: Tan
authors.forename: T Y
authors.initials: TY
authors.lastname: Teh
mesh_terms: D000704:Analysis of Variance; D003116:Color; D004396:Coloring Agents; D001840:Dental Bonding; D003737:Dental Cavity Preparation / Q000145:classification; D003743:Dental Enamel / Q000648:ultrastructure; D003763:Dental Leakage / Q000145:classification* / Q000473:pathology; D003775:Dental Polishing / Q000295:instrumentation / Q000379:methods*; D003793:Dental Restoration, Permanent / Q000009:adverse effects*; D003804:Dentin / Q000648:ultrastructure; D018130:Diamond; D004955:Esthetics, Dental; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D019279:Resin Cements / Q000737:chemistry*; D012117:Resins, Synthetic / Q000737:chemistry; D013499:Surface Properties; D019237:Tooth Cervix / Q000648:ultrastructure
chemical_list: D004396:Coloring Agents; C079765:Fuji II LC cement; D005899:Glass Ionomer Cements; D019279:Resin Cements; D012117:Resins, Synthetic; C084541:Fuji glass-ionomer lining cement; D018130:Diamond