Journal of Conservative Dentistry
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ARTICLE
Year : 2006  |  Volume : 9  |  Issue : 3  |  Page : 113-116

A dynamic methodology for measuring fluoride release from restorative materials


Department of Conservative Dentistry and Endodontics, Meenakshi Ammal Dental College, Chennai - 95, India

Correspondence Address:
Hemamalathi
Department of Conservative Dentistry and Endodontics, Meenakshi Ammal Dental College, Chennai - 95
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-0707.42356

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Objective: The conventional methodology employed for measuring fluoride release from restorative materials is done by suspending a sample in a static media and measuring the fluoride release at designated time intervals. The main drawback of this methodology is that it does not make allowance for the dynamic system that exists in the oral cavity. Therefore a newer methodology which mimics the oral cavity by employing a continuous flow system to measure fluoride release was compared with that of the existing methodology. Methods: Twenty disc specimens were prepared using conventional glass ionomer cement (Fuji Il, GC Co., Tokyo. Japan) and divided into two groups of ten each. In the first group fluoride release was measured using standard methodology and in the second group fluoride release was measured using a continuous flow system. In the continuous flow system. deionised water is allowed to flow through an intravenous infusion apparatus at a constant rate of 30ml/ hr stimulating the salivary flow rate. A constant volume of medium (2ml) is maintained in the drip chamber where specimen is suspended for fluoride release representing maximum volume of' saliva before swallowing. Statistical analysis : Fluoride ion concentration from the standard and new methodology was compared using student's independent t-test. Results: Significantly low amounts of fluoride was released from the specimens measured using the new methodology at all time intervals.


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