3种浓度过氧化脲漂白剂对牙科陶瓷表面粗糙度的影响  

Effects of three different concentrations of bleaching gels on the surface roughness of dental porcelain

作　　者：刘金萍 谢瑜侠 

机构地区：[1]许昌市第二人民医院口腔中心,河南许昌461000 [2]许昌市第二人民医院急诊科

出　　处：《广东牙病防治》2012年第11期576-578,共3页Journal of Dental Prevention and Treatment

摘　　要：目的评估3种浓度过氧化脲漂白剂对牙科陶瓷表面粗糙度的影响。方法 80个瓷块按随机数字表法分成4组。A、B、C组所有瓷块进行为期3周,每天8 h的漂白,A组漂白剂为质量分数10%的过氧化脲,B组为质量分数15%的过氧化脲,C组为质量分数20%的过氧化脲;D组为空白对照组,浸泡于人工唾液里。表面粗糙度仪测量所有样本初始时和漂白1 d、2 d、3 d、1周、2周、3周后的瓷块表面粗糙度,并进行统计学分析。结果 A、B、C、D 4组瓷块的初始表面粗糙度分别为(0.073±0.003)μm、(0.073±0.002)μm、(0.072±0.003)μm、(0.074±0.003)μm,3周后的粗糙度分别为(0.073±0.004)μm、(0.073±0.005)μm、(0.074±0.006)μm、(0.074±0.005)μm。7个时间点,4组组间和组内表面粗糙度差异均无统计学意义(P>0.05)。结论 3种浓度过氧化脲漂白剂对牙科陶瓷表面无明显不良影响。Objective To assess effects of three different concentrations of carbamide peroxide on the surface roughness of dental porcelain.Methods Surface roughness of 80 ceramic blocks were measured by a surface roughness tester,and then were randomly divided into four groups： group A were bleached with 10% carbamide peroxide eight hours per day;group B were bleached with 15% carbamide peroxide eight hours per day;group C were bleached with 20% carbamide peroxide eight hours per day;group D were soaked in artificial saliva as a blank control group.The first three groups were bleached for 3 weeks.Ceramic blocks surface roughness were measured at time points of 1 d,2 d,3 d,1 w,2 w,3 w.Results There were no significant difference（P0.05） of ceramic blocks surface roughness among the four groups.Conclusion Bleaching with 10%,15% or 20% carbamide peroxide for three weeks have no obvious adverse effects on dental porcelain surface.

关 键 词：牙齿美白 过氧化脲 牙科陶瓷 表面粗糙度 

分 类 号：R78[医药卫生—口腔医学]