title: Effect of polishing on the microleakage of three different restorative materials: an in vitro study.
abstract: OBJECTIVE
  The purpose of this in vitro study was to investigate the effect of polishing systems on the microleakage of three different restorative materials (Ketac Molar Easymix, Ketac N100 and Filtek P90).
  
  
  METHODS
  Class V cavities were prepared at the cemento-enamel junction of 60 freshly extracted premolars. The prepared teeth were randomly divided into three groups and restored with the three materials. The restored teeth were stored in distilled water at 37°C for 1 week. The restored teeth were then divided into two subgroups (polished and not polished) of 10. Finishing and polishing of the polished group was done using the Sof-Lex polishing system. Furthermore, all the restorations were subjected to dye penetration testing.
  
  
  RESULTS
  Results showed that maximum microleakage was observed for the not polished group of Filtek P90 and least levels of microleakage were seen for the polished group of Ketac Molar Easymix.
  
  
  CONCLUSIONS
  There was a significant difference seen when Ketac Molar Easymix was compared with Ketac N100 and Filtek P90 in terms of the extent of microleakage exhibited on polishing of the three materials; with the former exhibiting the least microleakage scores.
authors.affiliation: Department of Pedodontics and Preventive Dentistry, IDST Dental College, Kadrabad, Modinagar, Ghaziabad, Uttar Pradesh, India.
authors.forename: Arnab
authors.initials: A
authors.lastname: Sengupta
authors.forename: Anil
authors.initials: A
authors.lastname: Gupta
authors.forename: Renu
authors.initials: R
authors.lastname: Dagur
mesh_terms: D003775:Dental Polishing; D003793:Dental Restoration, Permanent; D006801:Humans; D066298:In Vitro Techniques