کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1420865 986384 2014 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Vertical and horizontal polymerization shrinkage in composite restorations
ترجمه فارسی عنوان
انقباض پلیمریزاسیون عمودی و افقی در ترمیم کامپوزیت
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
چکیده انگلیسی

ObjectivePolymerization shrinkage developed in vertical and horizontal directions after light activation of light-curing composite restorative materials. The purpose of this study was to examine the effects of vertical and horizontal polymerization shrinkage on: (a) dimensional changes of resin composites in tooth cavities; (b) shear bond strengths to enamel and dentin; and (c) marginal gap width in a non-reacting Teflon mold.MethodsVertical and horizontal polymerization shrinkage in tooth cavities were measured immediately (3 min) after light activation. With the same time lapse, shear bond strengths to enamel and dentin and marginal gap widths in Teflon mold were also measured.ResultsThere was a significant correlation between vertical and horizontal polymerization shrinkage (r = 0.647, p = 0.043) in the tooth cavity. Composite materials which produced small vertical shrinkage also produced smaller horizontal shrinkage. Composite materials which produced small vertical shrinkage in the tooth cavity exhibited greater shear bond strengths to both enamel (r = −0.697, p = 0.025) and dentin (r = −0.752, p = 0.012). Composite materials which produced smaller horizontal shrinkage produced smaller marginal gap widths in the Teflon mold (r = 0.829, p = 0.003). No relationships were observed between horizontal shrinkage in the tooth cavity and shear bond strengths to both enamel and dentin (p > 0.05).SignificanceDuring the early stage of setting (<3 min) in tooth cavities, the vertical shrinkage of light-activated composite restorative materials was correlated with horizontal shrinkage.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dental Materials - Volume 30, Issue 7, July 2014, Pages e189–e198
نویسندگان
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