title: "Effect of nano-filled surface coating agent on fluoride release from conventional glass ionomer cement: an in vitro trial".
abstract: BACKGROUND
  To overcome the drawbacks of glass ionomer cement of sensitivity to initial desiccation and moisture contamination the use of surface coating agent is recommended. The search in this area led to invent of use of nanofillers in surface coating agent, but its effect on fluoride release is not clear.
  
  
  OBJECTIVE
  The aim of this study is to evaluate and compare the fluoride release from conventional glass ionomer cement with and without surface coating agent.
  
  
  METHODS
  This in vitro study comprised of total 80 samples (40 samples of each with and without surface coating).
  
  
  METHODS
  Specimens were prepared, G coat plus was applied and light cured. Fluoride release of the sample was measured every 24 h for 7 days and weekly from 7th to 21 st day using Sension4 pH/ISE/MV Meter.
  
  
  METHODS
  Descriptive Statistics, Repeated Measure ANOVA, Paired Sample t-test, Independent Sample t-test, Scheffe post hoc test.
  
  
  RESULTS
  Mean values clearly reveal a significant decrease in the fluoride release from day 1 to day 21 for both groups. Non-coated group released significantly more fluoride than surface coated group (P<0.001).
  
  
  CONCLUSIONS
  It can be concluded that nanofilled surface coating agent will reduce the amount of fluoride released into oral environment as compared to non-coated group and at the same time releasing fluoride into surrounding cavity walls to create zones of inhibition into the cavity floor to help internal remineralization.
authors.affiliation: Department of Paediatric and Preventive Dentistry, Peoples College of Dental Sciences, Bhopal, Madya Pradesh, India.
authors.forename: S
authors.initials: S
authors.lastname: Tiwari
authors.forename: B
authors.initials: B
authors.lastname: Nandlal
mesh_terms: D002327:Cariostatic Agents / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D004058:Diffusion; D005459:Fluorides / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D017736:Ion-Selective Electrodes; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D002327:Cariostatic Agents; D020099:Coated Materials, Biocompatible; D005899:Glass Ionomer Cements; D014867:Water; D005459:Fluorides