A COMPARATIVE EVALUATION OF FLUORIDE RELEASE, RECHARGE AND RE-RELEASING ABILITIES OF THREE DIFFERENT RESTORATIVE MATERIALS - AN INVITRO STUDY

C. Sunil Kumar; M. Obula Reddy; S.Datta Prasad; N. Vamsee Krishna; S. Sunil Kumar; K. S. Chandra Babu

Volume : IX, Issue : III, March - 2020

A COMPARATIVE EVALUATION OF FLUORIDE RELEASE, RECHARGE AND RE-RELEASING ABILITIES OF THREE DIFFERENT RESTORATIVE MATERIALS - AN INVITRO STUDY

C. Sunil Kumar, M. Obula Reddy, S. Datta Prasad, N. Vamsee Krishna, S. Sunil Kumar, K. S. Chandra Babu

Abstract :

INTRODUCTION: The most important property of Fluoride is anti-cariogenic property which aids in remineralization of incipient carious lesions in enamel thereby inhibiting enamel demineralization i.e. it helps in arresting or reversal of incipient enamel lesions. A prolonged exposure of incipient carious lesions to fluoride in the aqueous phase achieves the cariostatic effect. OBJECTIVES: The aim of the present study is to evaluate the amount of fluoride released by three different Restorative Materialsi.e. Glass Ionomer Cement, Resin Modified Glass Ionomer Cement, Cention on 1st,7th and 15th day followed by Recharge and Re-release after recharging with various Flouride applications. MATERIALS AND METHODOLOGY: Fifteen Disk-shaped specimens for each group (8.5 mm diameter; 3 mm thickness) were prepared from three different restorative materials using cylindrical Teflon molds according to manufacturer�s instructions. The specimens in each individual group were incubated in a 95% relative humid environment at 37�C for 24 hours. Specimens of each group were immersed in 20 ml deionized water in plastic bottles and stored in the incubator at 37�C, Fluoride concentration was measured using a UV Spectrophotometer after 1st ,7th & 15 days. The samples from each group were now divided into: 3 Sub Groups of five each. Sub Group A - Control group – No topical fluoride application. Sub Group B - The samples were recharged with 2% Neutral Sodium Fluoride solution for 4 minutes and washed with copious deionized water for 10 sec and dried on absorbent paper. Sub Group C - The samples were recharged by hand ushing with a Fluoridated ushing Dentifrice for four minutes and then wiped clean with a tissue and rinsed for 10 sec using copious deionized water and dried. Measurement of fluoride Re-release is done by UV Spectrophotometer after 1st ,7th and 15thday after recharge.The results were statistically analysed using analysis of variance (one-way ANOVA) and Tukey Kramer multiple comparison tests (p≤0.05). RESULTS: Independent of the observation time period of thestudy the Conventional GIC released the highest amount of fluoride followed by RMGIC & CENTION. The initial burst effect was seen with GIC�S but not with RMGIC, CENTION. After topical fluoride application fluoride re-release was highest in Sub Group B and GIC had a greater recharging ability followed by RMGIC & CENTION. The fluoride re-release was greatest on 1st day followed by rapid return tonear exposure levels. CONCLUSION: From the study it was concluded that, the initialFluoride release was highest from Conventional GIC followedby Resin Modified GIC, CENTION. The Fluoride release was high when recharging with professional regime (2%NaF) as compared to home regime (Toothpaste).