An in vitro study of fluoride release rate of F-containing thermoplastic resina
- VernacularTitle:单氟磷酸钠加入可摘局部义齿热凝基托树脂后氟离子的体外释放实验
- Author:
Jing GUO
;
Hongshui ZHU
- Publication Type:Journal Article
- Keywords:
F-containing composite resin;
Slow-releasing fluoride;
Release rate;
Caries
- From:
Journal of Practical Stomatology
2000;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To observe the fluoride release rate of F-containing thermoplastic resina,trying to find a suitable concentration of fluoride in thermoplastic resina to prevent caries in base teeth of partial denture restorations.Methods:Na2(PO3)F-containing thermoplastic resina,respectively 0,10%,15%,20% and 25%(w/w)in concentration were cut into three 1 g blocks and immersed in 100,200 and 500 ml deionized water.These composite resins in 100 ml and 200 ml solutions were replaced every 1,2,3,6,9,16 days(every 7 days after that)until two months later,500 ml solution was reserved after 3,6,9 days every 7 days later until two months,2 ml of which were reserved every time.The fluoride release rates of these thermoplastic resina were tested by potentiometry.Results:All thermoplastic resina containing different concentrations of fluoride could release F-during the period of 65 days.Conclusion:When Na2(PO3)F is mixed in thermoplastic resina,it releases fluoride slowly.Thermoplastic resina containing 15% F-has higher release rates of fluoride.
