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Journal of Dentomaxillofacil Radiology, Pathology and Surgery، جلد ۲، شماره ۴، صفحات ۷-۱۴
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عنوان انگلیسی Color Stability of a Microhybrid Resin Composite Polymerized with LED and QTH Light Curing Units
چکیده انگلیسی مقاله Introduction: Discoloration of resin composites is a common reason for replacement of these restorations. The aim of this study was to eva-luate the influence of different light curing de-vices on color stability of a microhybrid resin composite. Materials and Methods: 80 disc-shaped speci-mens (8 mm in diameter, 2-mm height) were fabricated from filtek Z250 resin composite. Specimens were divided into 4 groups (n=20) and cured with LED (Bluephase C5, Valo) or QTH (Astralis7 with two different light intensity) light curing devices. Baseline color of each specimen was measured with a spectrophotometer according to the CIE (L*a*b*) color scale. ( CIE L*a*b* is a color measurement system with dimension L for lightness and a and b for the color-opponent dimensions). Each subgroup (n=10) were immersed in tea or artificial saliva for 72h at 37°C. The color values of specimens were re-measured and the color change values (ΔE*ab) were calculated using One-Way ANOVA and Tukey test. A P value of < 0.05 was considered significant. Results: In groups immersed in tea, specimens cured with high power mode of Astralis7 (750mW/cm2), showed the statistically signifi-cant lowest color change. There was no statisti-cally significant difference between two types of Light Emitting Diode units. Conclusion: Conventional halogen light (QTH) with high power mode showed the maximum color stability in tea.
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نویسندگان مقاله شقایق رضوی | shaghayegh razavi
dental materials research cen ter, department of operative dentistry, faculty of dentistry, babol university of medical sciences, babol-iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (Babol university of medical sciences)

بهناز اسماعیلی | behnaz esmaeili
dental materials research cen ter, department of operative dentistry, faculty of dentistry, babol university of medical sciences, babol-iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (Babol university of medical sciences)

هدی امیری | hoda amiri


مهدیه پاکدامن | mahdiye pakdaman


علی بیژنی | ali bijani
social determinants of health research center, babol university of medical sciences, babol-iran.

سازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (Babol university of medical sciences)

نشانی اینترنتی http://3dj.gums.ac.ir/browse.php?a_code=A-10-1-36&slc_lang=en&sid=en
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زبان مقاله منتشر شده en
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