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Journal of Dentomaxillofacil Radiology, Pathology and Surgery، جلد ۱۲، شماره ۱، صفحات ۱-۸
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عنوان انگلیسی Research Paper: Effects of three whitening toothpastes on the surface roughness and morphology of a nanohybrid composite resin
چکیده انگلیسی مقاله Abstract Introduction: The present in vitro study compared the effects of three whitening toothpastes on the surface roughness of a nanohybrid composite resin. Materials and Methods: Fifty-five disk-shaped composite resin samples (Opallis) were produced and divided into five groups based on the brushing with toothpastes (n=11): 1. Whitening toothpaste containing blue-covarine (White Now, Signal); 2. Whitening toothpaste containing hydrogen peroxide (Optic White, Colgate); 3. Whitening toothpaste containing abrasive agents (Opalescence, Ultradent); 4. Conventional toothpaste (Max Fresh, Colgate); 5. Control (storage in distilled water). Brushing in all test groups was carried out using a brush testing machine. Changes in surface roughness (Ra) and the surface morphology of composite resin were evaluated using profilometry and electron microscopy, respectively. The data were analyzed with paired-samples t-test, Wilcoxon, Kruskal-Wallis, and Mann-Whitney tests. (α=0.05). Results: Brushing with different kinds of toothpaste increased the Ra of the composite resin compared to the baseline (p< 0.05). There were significant differences in Ra between the groups (P< 0.001). The Optic White toothpaste group exhibited higher surface roughness than the conventional toothpaste group (Max Fresh) (P< 0.001), with no significant differences from the White Now and Opalescence groups (P=0.065 and P=0.523, respectively). Conclusion: Hydrogen peroxide-containing whitening toothpastes caused the greatest changes in surface roughness and morphology of the nanohybrid composite resin compared to the conventional toothpaste.  
کلیدواژه‌های انگلیسی مقاله Composite resins, Tooth whitening agent, toothpastes
نویسندگان مقاله | Fereshteh Naser Alavi
Assistant professor, Dental Sciences Research Center, Department of Operative Dentistry, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.


| Niloofar Moein
Assistant professor, Dental Sciences Research Center, Department of Operative Dentistry, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran.


| Mohammad Ali Yousefi
Dentist, Rasht, Iran.
نشانی اینترنتی http://3dj.gums.ac.ir/browse.php?a_code=A-10-382-63&slc_lang=en&sid=1
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