کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1423015 986473 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of short-term water storage on the elastic properties of some dental restorative materials—A resonant ultrasound spectroscopy study
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
پیش نمایش صفحه اول مقاله
Effect of short-term water storage on the elastic properties of some dental restorative materials—A resonant ultrasound spectroscopy study
چکیده انگلیسی

ObjectivesThis study was aimed to determine if short-term water storage would change elastic properties of dental composite materials.MethodsParticulate filler composite resin and continuous unidirectional E-glass FRC materials were photopolymerized and additionally post-polymerized by heat for testing elastic properties with the Resonance Ultrasound Spectroscopy method as a function of time in water storage. The test specimens were stored in 37 °C water for up to 30 days.ResultsAbout 1% weight increase due to water sorption was observed in both materials with both polymerization methods. Water sorption did not change the resonance frequencies towards lower values, indicating no significant decrease in elastic properties in these materials. Because of high damping of the polymer composite materials leading to wide resonance peaks and low number of the recorded peaks, accurate determination of the elastic properties was not possible.SignificanceResults suggest that the most likely explanation for the previously observed decrease in bending stiffness of FRC materials is the decreased yield limit of the hydrated polymer matrix. It is important to recognize that water sorption has the effect on mechanical properties of dental composite materials by changing the yield limit of the matrix rather than by changing the elastic properties of the material.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dental Materials - Volume 23, Issue 7, July 2007, Pages 878–884
نویسندگان
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