Fluoride Release Process of Fluoride-containing Kaolinite-acrylamide Composite Resins as Pit and Fissure Sealants
Date Issued
2011
Date
2011
Author(s)
Kuo, Wen-Ling
Abstract
Objectives
The newly-developed pit and fissure sealant, fluoride-containing kaolinite-acrylamide composite resin, has the better fracture toughness, hardness and the less viscosity when compared with ClinproTM. It is also proved that the new material has no biological toxicity. The purpose of the study is to further understand the processes of fluoride release and recharge of the new material and other two pit and fissure sealants (ClinproTM and ClinproTM XT), and make the advanced comparison.
Materials and methods
Three materials were used in the study— fluoride-containing Kaolinite-acrylamide composite resin, ClinproTM and ClinproTM XT. The last two materials were the control groups. Fluoride was released from the materials into the deionized water, and fluoride in the water was analyzed by the ion chromatography for different purposes. The present study included three parts. Part I was “56 days fluoride elution experiment” and to figure out the equations which were the most representative for the plots of the fluoride cumulative release of the three materials. Part II was ”maturation experiment”. Part III was “different time points for NaF recharge”
Results
At the Part I, the most representative equation for the plot of the fluoride cumulative release of ClinproTM was [F]c = a*t/(b+t)+c*t/(d+t)+e*t；the equation for K-acrylamide CR was [F]c=([F]I*t/(t1/2+t)) + ([F]I’*t/(t1/2’+t)) + Ns*t; the equation for ClinproTM XT was [F]c=([F]I*t/(t1/2+t)) + ([F]I’*t/(t1/2’+t)). At the Part II, the different maturation time had more effect on the fluoride release amount of ClinproTM XT than on ClinproTM and K-acrylamdie CR. At the Part III, the three materials all had the ability of fluoride recharge and re-release. No matter what time point of the fluoride recharge was, there was no significant change in the fluoride re-release amount of the three materials. The ability of fluoride recharge: ClinproTM XT>K-acrylamide CR>ClinproTM。
Conclusion
Fluoride-containing kaolinite-acrylamide composite resin as a pit and fissure sealant has better results of fluoride release and recharge than ClinproTM though worse results than ClinproTM XT. However, the new material, resin-based, was more resistant to wear and chemical irritants than ClinproTM XT. When applying to pits and fissures, it was also more convenient to use the new material because of the less viscosity. According to the equations acquired, we could get the advanced information of fluoride release process.
Subjects
pit and fissure sealant
fluoride release and recharge
Kaolinite-acrylamide composite resin
polymer-kaolinite composite
Type
thesis
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