الهدف: قيمت هذه الدراسة قدرة بعض المواد المرممة على تحرير الفلور لفترة 28 يوماً.
المواد و الطرق: تم صنع 10 عينات لكل مادة من المواد الأربعة بحجم (4*2*2) مم3 تبعاً لتعليمات المنتج، و غمرت هذه العينات في 2 مل من الماء المنزوع الشوارد الذي تم استبداله في كل مرحلة و لكل عينة.
النتائج: بينت النتائج أن مواد الإسمنت الزجاجي الشاردي (Fuji IX GP و Vivaglass Cem) تحرر الفلور بشكل أعلى مقارنةً مع الكومبومير و الراتنج المركب، لكنه تناقص بسرعة بعد اليوم الثالث، و استمر هذا التحرر لفترة 28 يوماً. كما أظهرت تحرراً منخفضاً للفلور من الراتنج المركب، و ينعدم كلياً مع مرور الوقت.
الاستنتاجات: أظهر الإسمنت الزجاجي الشاردي تحريراً أعلى خلال اليوم الأول، و تناقص بشكل تدريجي خلال الأسبوع الأول حتى وصل لمستويات منخفضة في اليوم 28، و هذا يدل على ظاهرة (القفزة الأولية). بينما لم يظهر الكومبومير و الراتنج المركب المستخدمان في هذه الدراسة هذه الظاهرة.
Objective:This study evaluated the fluoride release of four dental restorative
materials for a period of 28 days.
Materials And Methods:A total of 10 specimens (4 * 2 * 2)mm3 for each of the four
materials were prepared following manufacturer’s instructions and immersed
independently in 2 ml of distilled water which was changed every period for all the
specimens.
Results:The results demonstrated that the glass ionomer cements (Fuji IX GP and
VivaglassCem) release high fluoride compared with the compomer and composite resin,
but rapidly decreased after the third day and continued this releasing for a period of 28
days , also showed low fluoride release of composite resin and lacking entirely with the
passage of time.
Conclusions:The fluoride released by the glass ionomer cements (GICs) was found
to be highest during the first 24 h and decreased significantly over the 1st week with lower
levels obtained on the 28th day, thus demonstrating the phenomenon of “initial burst”.
The composite resin and compomer used in this study did not show this “initial
burst”.
References used
ATTAR. N; Ö NEN. A. Fluoride release and uptake characteristics of aesthetic restorative materials, J Oral Rehabil 2002, 29:791–8
BORGES. FT; CAMPOS.WR; MUNARI. LS; MOREIRA. AN; PAIVA. SM; MAGALHAES. CS. Cariostaticm effect of fluoride-containing restorative materials associated with fluoride gels on root dentin, J Appl Oral Sci 2010, 18(5):453-60
BUZALAF .MA; PASSAN .JP; HONORIO. HM; TEN CATE. JM. Mechanisms of action of fluoride forcaries control,Monogr Oral Sci 2011, 22:97-114
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