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نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
FLEXURAL STRENGTH OF PREIMPREGNATED FIB ER REINFORCED
FLEXURAL STRENGTH OF PREIMPREGNATED FIB ER REINFORCED
 
لغة الوثيقة : الانجليزية 
المستخلص : The fiber-reinforced composite (FRC) systems produced for constructing fixed restorations which are available in the market are Sculpture Plus / FiberKor (Jeneric / Pentron) and Targis / Vectris (Ivoclar). Objectives: To determine the flexural strength of preimpregnated FRC bars simulating fixed restorations in vitro using different thickness and different span. lengths and examine them under the scanning electron microscope (SEM). Method: In this study rectangular bars with different thickness were constructed from these two systems according to the manufacturer's· instructions. Flexural load of these bars was obtained by subjecting them to 3-point loading. Tests were performed in different experimental designs using special jigs and flexural strength was then calculated. Data was statistically analyzed using one way analysis of variance (ANOY A). Some fractured bars were examined under SEM. Results & Conclusions: It was found that increase the amount of fibers does not increase the flexural strength; however in some cases the flexural strength was reduced. When the bars had the same amount of fibers, increasing the distance between the supports would increase the flexutal strength which the bars can withstand before fracture in most cases. The SEM evaluation of the bars after flexural strength testing, showed that, for the Sculpture plus / Fiberkor specimens there was effective wetting and coupling of the fiber bundles by the resin confirmed by absence of gaps between them. The failure occurred usually away from the fiber-matrix interface. However for Targis / Vectris rods, there were gaps between the fiber bundles and the resin indicating poor wetting. 
ردمد : 0 
اسم الدورية : المجلة المصرية لطب الأسنان 
المجلد : 52 
العدد : 3 
سنة النشر : 2006 هـ
2006 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Monday, December 10, 2007 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
محمد عوضAwad, Mohamed باحث رئيسيدكتوراهmawad@kau.edu.sa
عبد الحميد مغربيMaghrabi, Abdulhameed باحث مشاركدكتوراه 

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