کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1420485 1508929 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of immersion time of restorative glass ionomer cements and immersion duration in calcium chloride solution on surface hardness
ترجمه فارسی عنوان
اثر زمان غوطه وری از سیمان آینومر شیشه ترمیمی و مدت زمان غوطه وری در محلول کلرید کلسیم بر روی سختی سطح
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد بیومتریال
چکیده انگلیسی

ObjectivesThe objective of this study was to evaluate the effect of immersion time of restorative glass ionomer cements (GICs) and immersion duration in calcium chloride (CaCl2) solution on the surface hardness.MethodsTwo high-viscosity GICs, Fuji IX GP and GlasIonomer FX-II, were selected. Forty-eight specimens were randomly divided into two groups. Sixty minutes after being mixed, half of them were immersed in a 42.7 wt% CaCl2 solution for 10, 30, or 60 min (Group 1); the remaining specimens were immersed after an additional 1-week of storage (Group 2). The surface hardness of the specimens was measured and analyzed with two-way ANOVA and the Tukey HSD test (α = 0.05). The surface compositions were examined using energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy.ResultsThe surface hardness of Group 1 significantly increased as the immersion duration in CaCl2 increased; that of Group 2 significantly increased only after 60-minute CaCl2 immersion. After CaCl2 immersion, the amounts of Ca increased as the immersion duration increased. The surface hardness after CaCl2 immersion significantly correlated with the amount of Ca in Group 1, but not in Group 2. The binding energy of the Ca2p peak was similar to that of calcium polyalkenoate. These findings indicated that the Ca ions from the CaCl2 solution created chemical bonds with the carboxylic acid groups in the cement matrix.SignificanceImmersion of GICs in CaCl2 solution at the early stage of setting was considered to enhance the formation of the polyacid salt matrix; as a result, the surface hardness increased.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dental Materials - Volume 30, Issue 12, December 2014, Pages e377–e383
نویسندگان
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