Jorjani Biomedicine Journal
فصلنامه علمی پژوهشی زیست پزشکی جرجانی
Jorjani Biomed J
Medical Sciences
http://goums.ac.ir/jorjanijournal
1
admin
2645-3509
10.52547/jorjanibiomedj
en
jalali
1400
2
1
gregorian
2021
5
1
9
2
online
1
fulltext
en
Evaluation of Bleaching with Carbamide Peroxide on Microhardness, Mineral Content, and Color Change of White Spot Lesions
پزشکی عمومى
General medicine
تحقیقی
Original article
<div style="text-align: justify;"><strong><em>Background and Objective</em></strong><strong>:</strong> Tooth bleaching changes the microhardness and mineral content and color of the tooth. The present study aimed to evaluate the effect of carbamide peroxide on microhardness, mineral content and color change in white spot lesions.<br>
<strong><em>Material and Methods:</em></strong> Thirty-two samples were selected without caries, cracks and stains, and immersed in 0.5% chloramine-T for one week. Then the tooth crowns were separated. The teeth were artificially decayed by pH cycling. For bleaching on the enamel, a coating of 10% carbamide peroxide gel with a thickness of 1 mm was used for 8 hours. Samples were stored in artificial saliva for 16 hours. Bleaching process lasted for 14 days. Microhardness, color changes, calcium and phosphorus levels were measured before and after bleaching. Paired t-test and one-sample test were used to analyze the data.<br>
<strong><em>Results:</em></strong> The microhardness test results were 338.02± 90.15 and 320.94±87.41 before and after bleaching, respectively. microhardness of the samples significantly decreased after bleaching compared to before bleaching (P<0.001). Calcium and phosphorus content in samples after bleaching was not significantly different from before bleaching (P>0.05). The mean color change coefficient (∆E) after bleaching was 6.82±3.96. ∆E in the studied samples was significantly higher than the standard (∆E =3.3).<br>
<strong><em>Conclusion:</em></strong> Bleaching with 10% carbamide peroxide significantly reduced microhardness. There was no change in the mineral content of the enamel and color change was proper. It can be concluded from this study that bleaching with carbamide peroxide can be successful.</div>
Tooth bleaching,Carbamide Peroxide,Hardness Tests,
68
78
http://goums.ac.ir/jorjanijournal/browse.php?a_code=A-10-824-1&slc_lang=en&sid=1
abdolrahim
davari
rdavari2000@yahoo.com
10031947532846007067
10031947532846007067
No
Professor of Operative and Aesthetic Dentistry, Member of Social Determinant of Oral Health Research Center, ShahidSadoughi University of Medical Sciences, Yazd, Iran.
Alireza
Daneshkazemi
alirezadaneshkazemi@yahoo.com
10031947532846007068
10031947532846007068
No
Professor of Operative and Aesthetic Dentistry, Member of Social Determinant of Oral Health Research Center, ShahidSadoughi University of Medical Sciences, Yazd, Iran.
Farnaz
Farahat
10031947532846007069
10031947532846007069
No
Department of Operative and aesthetic dentistry, School of Dentistry, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
Elham
motallebi
elhammotallebi70@stu.ssu.ac.ir
10031947532846007070
10031947532846007070
Yes
Assistant professor of Operative and Aesthetic Dentistry Kashan University of Medical Sciences, Kashan, Iran.
sepideh
abbasi
sepideabbasidnt@gmail.com
10031947532846007071
10031947532846007071
No
Post Graduate Student of Operative and Aesthetic Dentistry, ShahidSadoughi University of Medical Sciences, Yazd, Iran.