title: Effect of a resin-based desensitizing agent and a self-etching dentin adhesive on marginal leakage of amalgam restorations.
abstract: OBJECTIVE
  The purpose of this study was to compare the marginal leakage of Class II amalgam restorations whose preparations were lined with a resin-based desensitizing agent, a self-etching adhesive system, and copal varnish.
  
  
  METHODS
  Fifty-six freshly extracted human premolar teeth were divided into four groups. A Class II preparation was prepared with only a proximal box on the mesial and distal surfaces of each tooth. The cavities in one group were lined with a desensitizing agent (VivaSens) and a second group with an adhesive (Clearfil S3 Bond). A third group was lined with copal varnish (Copalite) and a fourth group was used as the control without any cavity liner. Spherical high copper amalgam was hand-condensed into each preparation, specimens were thermocycled, stained, and sectioned. Microleakage was graded using a stereomicroscope. Microleakage scores were calculated and analyzed using the Kruskal Wallis and the Mann-Whitney tests (alpha=0.05).
  
  
  RESULTS
  Less microleakage was indicated with the VivaSens liner when compared with the other groups (P<0.05). Clearfil S3 Bond showed less microleakage than the control group (P<0.05), but the leakage with copal varnish and Clearfil S3 Bond was similar (P>0.05).
  
  
  CONCLUSIONS
  VivaSens reduced the microleakage of Class II high copper amalgam restorations significantly more than the Clearfil S3 Bond and copal varnish.
authors.affiliation: Department of Operative Dentistry, Mashhad Dental School and Dental Research Center, Mashhad University of Medical Sciences, Mashhad, Iran. dr_marjaneh@yahoo.com
authors.forename: Marjaneh
authors.initials: M
authors.lastname: Ghavamnasiri
authors.forename: Mohammad
authors.initials: M
authors.lastname: Alavi
authors.forename: Samin
authors.initials: S
authors.lastname: Alavi
mesh_terms: D001641:Bicuspid; D003188:Composite Resins; D003723:Dental Amalgam; D003736:Dental Cavity Lining; D003763:Dental Leakage; D003793:Dental Restoration, Permanent; D003807:Dentin Sensitivity / Q000517:prevention & control; D017220:Dentin-Bonding Agents; D006801:Humans; D019279:Resin Cements; D012116:Resins, Plant; D018709:Statistics, Nonparametric
chemical_list: C505694:Clearfil S3 Bond; D003188:Composite Resins; D017220:Dentin-Bonding Agents; D019279:Resin Cements; D012116:Resins, Plant; C525245:VivaSens Liner; C023806:Copalite; D003723:Dental Amalgam