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Article
The Effect of Curing Time on Fluoride Release from Composite Resin Material

Authors: Amer A. Taqa --- Manal A. Sultan
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2008 Volume: 8 Issue: 2 Pages: 255-258
Publisher: Mosul University جامعة الموصل

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Abstract

Aim: This study aims to measure the amount of fluoride release in deionized water from two composite resins materials (Kerr and Tetric ceram)over period of one month. By using different curing time forcuring the composite.Materials and Methods : Two types of composite resin materials were used. They are Tetric ceram and Kerr composite resins divided into five groups for each type of materialsused, each group contain ten sample materials and cured with different time of curing which are(20,30,40,50,60) seconds.The samples measured fluoride release after storing in 5ml of deionized waterthen incubated incubator at 37°C for 24 hours.Results: The amount of fluoride release was affected by the period of curing time. The materials which cured at (20,30,40) seconds gave high amount of fluoriderelease while the materials which cured at (50,60)seconds gave low amount of fluoride release. Conclusions: The amount of fluoride release from composite resins materials were affected by curing time. There is an increase in the amount of fluoride release by decreasing the period of curing time and decreasing by increasing the period of curing time.


Article
Fluoride Ions Release Study Of Different GIF Materials .

Author: Dr. Raid Fahim Salman Ph.D., M.Sc., B.D.S د.رائد فاهم
Journal: MUSTANSIRIA DENTAL JOURNAL مجلة المستنصرية لطب الاسنان ISSN: 18138500 Year: 2009 Volume: 6 Issue: 3 Pages: 198-202
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

AbstractThe purpose of this in vitro study was to compare & measure the release of fluoride ions from set tested materials, CGI (Pro-med), MGI (Ketac molar), and LCGI (Vitremer).The tested materials were made as molds with certain dimensions and each mold was placed in vial containing 100 ml. of DDW. Every 24 hrs, 5 ml. of the solution was transferred into smaller tubes to measure the fluoride release using spectrophotometer. This procedure was repeated every 24 hrs. for 14 days.The results revealed that the CGI (conventional glass ionomer) had higher release over other materials, then the MGI (modified glass ionomer) material, and finally the LCGI (light cure glass ionomer) with significant differences between them at P< 0.05.The MGI material had higher fluoride ions release concentrations over the LCGI. However, the CGI had higher fluoride ions release concentrations over other materials.


Article
Fluoride release from different tooth colored restorative materials: An in vitro study

Authors: Manal A AL-TAEE --- Abdul-haq A SULIMAN
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2001 Volume: 1 Issue: 3 Pages: S215-S228
Publisher: Mosul University جامعة الموصل

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Abstract

This in vitro study evaluated the amount of fluoride released from fluoride-containing materials over a period of (30) days. Twenty eight disk samples (2.5 mm depth × 10 mm diameter) were prepared and divided into four groups: GroupI Vitremer glass ionomer, group II resin composite Tetric, group III resin composite Definite, and group IV Compoglass.The samples were stored in an incubator at 37°C for (24) hours. Each disk was suspended in an individual plastic tube containing (3) ml of deionized water. The water was changed every (24) hours, fluoride release was determined at each day for (30) days, after buffering the solution with equal volume of TISAB. The fluoride release was measured with a fluoride-ion selective specific electrode previously calibrated from (0.05) to (100) ppm. Fluoride release was expressed in part per million (ppm).ANOVA test was used to evaluate the data. The results revealed that Vetrimer glass ionomer released significantly more fluoride (4l ppm) for the first day than all the other products. This was followed by Compoglass which exhibits more fluoride release than the other two types (32 ppm), the Tetric composite resin Was the third material in the amount of fluoride released (3.75 ppm), and finally the resin composite Definite released fluoride in about (0.75 ppm). All fluoride release was decreased from day (1) to (30) observation period.


Article
Fluoride release from Iraqi made glass ionomer cement. A comparative study

Authors: Jabbar H KAMEL --- Faraed D SALMAN --- Mohammed S AL-AJELY
Journal: Al-Rafidain Dental Journal مجلة الرافدين لطب الأسنان ISSN: 18121217 Year: 2002 Volume: 2 Issue: 3 Pages: 406-410
Publisher: Mosul University جامعة الموصل

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Abstract

This study was carried out to determine the fluoride release from Iraqi and two imported glass ionomer cements by placing(15) specimens(five for each type of glass ionomer cement) in a polyethylene container filled with deionized water and TISAB. Measurements of fluoride release were taken daily for(8) days following specimen preparation followed by onceweekly for a month Mean daily fluoride release was plotted against time. The results showed that there was a significant difference between Iraqi and Hibond materials within the same period of fluoride release and no significant difference between Iraqi and Degussa cements

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