title: Quantitative assessment of fluoride release and recharge ability of different restorative materials in different media: an in vitro study.
abstract: OBJECTIVE
  To measure fluoride release and recharge ability of restorative materials in deionised water, artificial saliva and lactic acid.
  
  
  METHODS
  Pellets were prepared from GC2, Ketac N100 and Beautifil II. Each pellets were individually immersed in 10 ml deionised water, artificial saliva or lactic acid as per respective subgroup for 24 h and then elutes were collected. Specimens were reimmersed in respective container. Fluoride released was analysed after 24 h, 7(th) and 15(th) day. On 15(th) day all specimens were exposed to 1.23% APF gel and fluoride release in respective solution was measured on 16(th), 22(nd), 30(th) day.
  
  
  RESULTS
  Fluoride release was more after 24 h for all materials in all media then decrease gradually. GC2 shows more fluoride release than Ketac N100 at 24 hours and on 7(th) day but onwards Ketac N100 released significantly more fluoride. Beautifil II showed least fluoride release at all measured intervals in all media. Order of fluoride release in media was lactic acid > deionised water > artificial saliva for all materials.
  
  
  CONCLUSIONS
  GICs are smart material which release more fluoride when environment become more acidic and also show tendency to recharge which helps clinically in caries risk children.
authors: Post Graduate Student, Department of Pedodontics & Preventive Dentistry, Government Dental College & Hospital , Patiala, Punjab, India .
authors: Mahesh M
authors: MM
authors: Jingarwar
authors: Professor and Head, Dpartment of Pedodontics and Preventive Dentistry, Government Dental College & Hospital , Patiala, Punjab, India .
authors: Anuradha
authors: A
authors: Pathak
authors: Medical Officer (Dentistry), Punjab Civil Medical Services , Punjab, India .
authors: Navroop Kaur
authors: NK
authors: Bajwa
authors: Demonstrator, Department of Pedodontics and Preventive, Dentistry, Government Dental College and Hospital Patiala , Punjab, India .
authors: Haridarshan Singh
authors: HS
authors: Sidhu
keywords: Artificial saliva; Fluoride release; Lactic acid; Recharge
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