ياسمن محمدي

Enamel erosion is a growing problem in dentistry. Because enamel does not have living cells, it cannot regenerate itself, so artificial methods are used to create enamel tissue. Bioactive glasses form the enamel tissue when placed in the oral environment. The goal is to form fluoropatite instead of hydroxyapatite, and the leading challenge is the source of fluoride used. The aim of this study was to investigate the formation of fluoroapatite phase due to immersion of fluorinated bioactive glass with NaF fluorine source in artificial saliva and also the effect of adding bioactive glass on the rheological behavior of toothpaste. Thus, bioacGve glasses with a base composiGon of 45% SiO2, 24.5% CaO, 24.5% Na2O and 6% P2O5 (% mol) and different percentages of 2.5, 5 and 7.5 (% mol) fluoride added to the composiGon, for The amount of bioactivity and their ability to repair tooth enamel have been synthesized by solgel method. These synthesized bioactive glasses were immersed in artificial saliva for 1, 4, 7, 14 and 21 days. To eva‎luate the performance of bioacGve glass, XRD analysis was used to determine the phases formed and FTIR analysis was used to determine the existing bonds. Also, a rheometric viscosity meter has been used to investigate the viscoelastic behavior of toothpaste due to the addition of bioactive glass powder. The results of XRD and FTIR tests showed that adding bioactive glass powder to toothpaste aJer 21 days of immersion in artificial saliva causes the formation of flora apatite crystals. Also, the presence of fluoride in the composition of bioactive glass increases its bioactivity. The results of rheometry test showed that adding bioactive glass powder to toothpaste at low strain rate causes an initial increase in toothpaste viscosity.

بايواكتيو ، فلورآپاتيت ، هيدروكسي آپاتيت

bioactive glass , toothpaste , bioactive

Yasaman Mohammadi

Dr. Eftekhari