Document Details
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Document Type |
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Article In Journal |
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Document Title |
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FLEXURAL STRENGTH OF PREIMPREGNATED FIB ER REINFORCED FLEXURAL STRENGTH OF PREIMPREGNATED FIB ER REINFORCED |
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Document Language |
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English |
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Abstract |
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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. |
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ISSN |
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0 |
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Journal Name |
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Egyptian Dental Journal |
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Volume |
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52 |
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Issue Number |
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3 |
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Publishing Year |
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2006 AH
2006 AD |
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Article Type |
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Article |
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Added Date |
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Monday, December 10, 2007 |
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Researchers
| محمد عوض | Awad, Mohamed | Investigator | Doctorate | mawad@kau.edu.sa |
| عبد الحميد مغربي | Maghrabi, Abdulhameed | Researcher | Doctorate | |
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