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Journal of Dental Research, Dental Clinics, Dental prospects، جلد ۱۱، شماره ۱، صفحات ۳۶-۴۲
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عنوان انگلیسی The Effect of Repeated Preheating of Dimethacrylate and Silorane-based Composite Resins on Marginal Gap of Class V Restorations
چکیده انگلیسی مقاله Background. One of the problems with composite resin restorations is gap formation at resin‒tooth interface. The present study evaluated the effect of preheating cycles of silorane- and dimethacrylate-based composite resins on gap formation at the gingival margins of Class V restorations. Methods. In this in vitro study, standard Class V cavities were prepared on the buccal surfaces of 48 bovine incisors. For restorative procedure, the samples were randomly divided into 2 groups based on the type of composite resin (group 1: di-methacrylate composite [Filtek Z250]; group 2: silorane composite [Filtek P90]) and each group was randomly divided into 2 subgroups based on the composite temperature (A: room temperature; B: after 40 preheating cycles up to 55°C). Marginal gaps were measured using a stereomicroscope at ×40 and analyzed with two-way ANOVA. Inter- and intra-group comparisons were analyzed with post-hoc Tukey tests. Significance level was defined at P < 0.05. Results. The maximum and minimum gaps were detected in groups 1-A and 2-B, respectively. The effects of composite resin type, preheating and interactive effect of these variables on gap formation were significant (P< 0.001). Post-hoc Tukey tests showed greater gap in dimethacrylate compared to silorane composite resins (P< 0.001). In each group, gap values were greater in composite resins at room temperature compared to composite resins after 40 preheating cycles (P< 0.001). Conclusion. Gap formation at the gingival margins of Class V cavities decreased due to preheating of both composite resins. Preheating of silorane-based composites can result in the best marginal adaptation.
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نویسندگان مقاله پرنیان علیزاده اسکویی | parnian alizadeh oskoee
professor, dental and periodontal research center, faculty of dentistry, tabriz university of medical sciences

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (Tabriz university of medical sciences)

فاطمه پورنقی آذر | fatemeh pournaghi azar
assistant professor, department of operative dentistry, faculty of dentistry, tabriz university of medical sciences

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (Tabriz university of medical sciences)

المیرا جعفری navimipour | elmira jafari navimipour
associated professor, department of operative dentistry, faculty of dentistry, tabriz university of medical sciences

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (Tabriz university of medical sciences)

محمد اسماعیل ابراهیمی چهارم | mohammad esmaeel ebrahimi chaharom
associated professor, department of operative dentistry, faculty of dentistry, tabriz university of medical sciences

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (Tabriz university of medical sciences)

فرشته ناصر علوی | fereshteh naser alavi
post-graduate student, department of operative dentistry, faculty of dentistry, tabriz university of medical sciences

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (Tabriz university of medical sciences)

اشکان سالاری | ashkan salari
post-graduate student, department of periodontology, faculty of dentistry, tabriz university of medical sciences

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تبریز (Tabriz university of medical sciences)

نشانی اینترنتی http://dentistry.tbzmed.ac.ir/joddd/index.php/joddd/article/view/2836
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Clinical Dentistry
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