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Journal of Craniomaxillofacial Research، جلد ۱۲، شماره ۲، صفحات ۷۹-۸۵
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عنوان انگلیسی Effects of At-Home Bleaching Gel and Two Beverages on the Microhardness of an Aesthetic Composite Resin
چکیده انگلیسی مقاله Introduction: The purpose of this study was to investigate the effects of 15% carbamide peroxide, orange juice, and Cola on the microhardness of composite resin restoration material.  Materials and Methods: In this in vitro study, forty disk-shaped composite samples were prepared and randomly classified into four groups (n=10); the artificial saliva (control), bleaching agent (15% carbamide peroxide), orange juice, and Cola. Vickers microhardness was measured on the surface of the samples before and after immersion for 6 and 48 hours.  Results: The microhardness values of the 15 % carbamide peroxide, Orange juice and Cola groups were significantly lower after 48 hours compared to the artificial saliva group (P=0.003, P=0.002, P=0.001, respectively). However, these differences were not statistically significant after 6 hours of immersion (P=0.068). When comparing the microhardness values of these groups over time, as expected, these measures significantly decreased, except for the 15 % carbamide peroxide group in which the mean microhardness value did not significantly decrease from baseline after 6 hours immersion (P=0.106). However, there was a significant difference after 48 hours compared to baseline and 6 hours immersion (P=0.001, P=0.004).  Conclusion: This suggests that 15 % carbamide peroxide gel can be employed as a bleaching agent in cases with composite restorations for a limited amount of time without significant deterioration of the microhardness. Keywords: Hardness; Carbamide Peroxide; Orange juice; Cola.
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نویسندگان مقاله | Somayeh Hosseini Tabatabaei
Oral and Dental Disease Research Center, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran; Department of Restorative Dentistry, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran.


| Atie Ghorbani
Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran.


| Amir Hossein Khazaei
Oral and Dental Disease Research Center, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran.
نشانی اینترنتی https://jcr.tums.ac.ir/index.php/jcr/article/view/546
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