ABRASIVE VERSUS NONABRASIVE WHITENING TOOTH PASTES EFFICIENCY AND ENAMEL SURFACE ROUGHNESS (IN-VITRO STUDY)

Esraa Abosree, Y. Gomaa, R. Gamal
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Abstract

Aim: This in vitro study was carried out to evaluate the efficiency of abrasive versus nonabrasive optical based whitening tooth pastes. Methods: A total of 30 sound extracted bovine teeth were sectioned, mounted in acrylic block and randomly divided into 3 groups I-III (water (control), abrasive optical whitening tooth paste (Closeup Diamond Attraction), nonabrasive optical whitening tooth paste (Closeup White Now)) respectively. The buccal surface of each sample was flattened and stained by immersion into a concentrated tea solution. Then samples were subjected to 5500 double strokes of brushing with 200g force using a brushing simulator. Tooth color and surface roughness were measured before and after the brushing procedure using reflecting spectrophotometer regarding (CIE) and a contact profilometer surface roughness tester. Results: For color, both whitening tooth pastes showed a statically significant means of ΔE1 and ΔE2 compared to the control group indicating a higher efficiency. Furthermore, all groups showed a statistically significant increase in roughness after brushing. On the other hand, they showed a non-statistically significant means compared to each other. Conclusions: Both types of pastes were effective in teeth whitening without creating potential harmful to surface of enamel for a time equivalent to one year usage in oral cavity.
磨料与非磨料美白牙膏的效率和牙釉质表面粗糙度(体外研究)
目的:在体外研究磨料与非磨料光学美白牙膏的效果。方法:将30颗声音提取的牛牙切片,安装在丙烯酸块上,随机分为3组(I-III),分别为水(对照)、磨料光学美白牙膏(Closeup Diamond Attraction)、非磨料光学美白牙膏(Closeup White Now)。每个样品的口腔表面被压平,并通过浸泡在浓缩茶溶液中染色。然后,使用刷牙模拟器以200g的力对样品进行5500次两次刷牙。使用反射分光光度计(CIE)和接触式轮廓仪表面粗糙度测试仪测量刷牙前后的牙齿颜色和表面粗糙度。结果:对于颜色,两种美白牙膏与对照组相比,在ΔE1和ΔE2上有统计学意义,表明效率更高。此外,所有组在刷牙后的粗糙度都有统计学上的显著增加。另一方面,它们相互比较显示出非统计上显著的均值。结论:两种牙膏均能有效美白牙齿,且对牙釉质表面无潜在危害,使用时间相当于口腔1年。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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