Comparative Evaluation of Fluoride Release and Recharge of Pre-Reacted Glass Ionomer Composite and Nano-ionomeric Glass Ionomer with daily Fluoride exposure: An In Vitro study

John, Philip (2013) Comparative Evaluation of Fluoride Release and Recharge of Pre-Reacted Glass Ionomer Composite and Nano-ionomeric Glass Ionomer with daily Fluoride exposure: An In Vitro study. Masters thesis, Ragas Dental College & Hospital, Chennai.

[img]
Preview
Text
240802313johnphilip.pdf

Download (3MB) | Preview

Abstract

BACKGROUND AND OBJECTIVE: Today there are several fluoride containing dental restorative materials available in the market including glass ionomer cements, resin modified glass ionomer cements, polyacid modified resins (compomers), pre-reacted glass ionomer composite (giomer), and composites which may act as fluoride reservoir, to increase fluoride levels in saliva, plaque and dental hard tissues, or may help to prevent or reduce secondary caries. Fluoride containing dental materials show clear differences in the fluoride release and uptake characteristics which may be influenced by several environmental factors. The present in-vitro study was conducted to compare and evaluate the fluoride release and recharge of pre-reacted glass ionomer composite and nano-ionomeric glass ionomer with daily fluoride exposure. METHODOLOGY: Thirty-six specimens each of pre-reacted glass ionomer composite and nano-ionomeric glass ionomer were divided into three treatment groups, namely control group (n=12), fluoridated dentrifice (1000 ppm) once daily group (n=12) and fluoridated dentrifice (1000 ppm) once daily + fluoridated mouthrinse (225 ppm) group (n=12). Each specimen was suspended in a pH cycling system consisting of a demineralizing solution (pH 4.4) for 6 hours and remineralizing solution (pH 7) for 18 hours. Fluoride release was measured every day for 21 days in both the immersion media using a fluoride ion specific electrode. RESULTS AND CONCLUSION: The fluoride release of both the restorative materials was found to be higher in the demineralizing solution than in the remineralization solution. Amongst both the materials, the nano-ionomeric glass ionomer had a higher fluoride release than the pre-reacted glass ionomer composite. Also the highest fluoride release was observed from samples which were exposed to both the fluoridated dentrifice and the fluoridated mouthrinse. Both the restorative materials showed no sustained pattern of fluoride recharge. The amount of fluoride released from both the materials decreased over a period of time. However, the nano-ionomeric glass ionomer showed better fluoride rechargability than the pre-reacted glass ionomeric composite.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Pre-reacted glass ionomeric composite ; nano-ionomeric glass ionomer ; daily fluoride exposure ; fluoride release and fluoride recharge.
Subjects: DENTAL > Paedodontics and Preventive Dentistry
Depositing User: Subramani R
Date Deposited: 12 Nov 2017 07:41
Last Modified: 12 Nov 2017 07:41
URI: http://repository-tnmgrmu.ac.in/id/eprint/3900

Actions (login required)

View Item View Item