کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1423401 | 986522 | 2007 | 8 صفحه PDF | دانلود رایگان |
ObjectiveThe purpose of the study was to measure the fatigue properties of four dental resin composites using a dynamic mechanical analysis and to relate the results with viscoelastic properties.MethodsDynamic torsional loading was conducted at resonance at 30–50 Hz. Specimens were thoroughly cured and tested dry at 21 °C.ResultsAll of the specimens showed a loss of strength following repeated stress, due to material fatigue. The material with the highest shear modulus had the lowest damping and the highest fatigue strength.SignificanceDental composites exhibit a modest loss of strength due to fatigue. Since mastication involves many cycles of stress during the life of a restoration, fatigue properties should be taken into account in restoration design.
Journal: Dental Materials - Volume 23, Issue 2, February 2007, Pages 235–242