Document Details Document Type : Article In Journal  Document Title : FLEXURAL STRENGTH OF PREIMPREGNATED FIB ER REINFORCED FLEXURAL STRENGTH OF PREIMPREGNATED FIB ER REINFORCED   Document Language : English  Abstract : 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.  ISSN : 0  Journal Name : Egyptian Dental Journal  Volume : 52  Issue Number : 3  Publishing Year : 2006 AH 2006 AD  Article Type : Article  Added Date : Monday, December 10, 2007  Researchers Researcher Name (Arabic) Researcher Name (English) Researcher Type Dr Grade Email محمد عوض Awad, Mohamed Investigator Doctorate mawad@kau.edu.sa عبد الحميد مغربي Maghrabi, Abdulhameed Researcher Doctorate   Files File Name Type Description  FLEXURAL STRENGTH OF PREIMPREGNATED FIBER REINFORCED COMPOSITE BARS SIMULATING FIXED PARITAL DENTURES.pdf pdf   Back To Researches Page