کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3145979 1197131 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Edge-strength of flowable resin-composites
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی دندانپزشکی، جراحی دهان و پزشکی
پیش نمایش صفحه اول مقاله
Edge-strength of flowable resin-composites
چکیده انگلیسی

ObjectivesTo evaluate in vitro the failure-forces of flowable composites at different distances from an interface edge of a bulk material.MethodsSeven materials were investigated. An edge-strength testing instrument (CK10) was used in this study. Fourteen disc specimens were prepared (12 mm × 2.5 mm) for each material using Teflon moulds, with a layering technique and light curing at 500 mW/cm2. Measurements were made (n = 5 per distance) at 0.4 mm until 1.0 mm distance from the edge with 0.1 mm interval. All specimens prepared were stored in distilled water at 37 °C for 1 week. The failure-force was recorded for each test and the failure mode was examined under the integral microscope of the CK10. One-way ANOVA followed by Tukey post-hoc test at the significance level of 0.05 was used for statistical analysis.ResultsThe highest failure-force at 0.5 mm (edge-strength) was found with Grandio flow (130.2 N) while the lowest was with Filtek flow (103.6 N). Significant correlation was found between the failure-forces and the increasing distance from the edge in all flowable composites giving coefficients ranging from r2 = 0.98 to 0.95. However, no correlation was found between the failure-forces and the percent filler (wt.%) of flowable composites at all distances. Two modes of failure were observed cracking and chipping.ConclusionsEdge-strength of flowable composites could be used to differentiate between materials and predict their clinical margin performance. Edge-fracture resistance of flowable composites is lower towards the margins than towards the centre of restoration.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dentistry - Volume 36, Issue 1, January 2008, Pages 63–68
نویسندگان
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