不同漂白方法对2种去龋离体牙充填体微渗漏的影响

Effect of Different Caries Removal and Bleaching Methods on the Microleakage of Filling Material and Teeth in Vitro

目的通过比较充填体与离体牙间微渗漏的深度,评价不同去龋方式和美白方法对离体牙充填体微渗漏的影响。方法选取因正畸需要拔除的健康牙60颗,人工造龋后将其随机分为传统去龋组和伢典去龋组,每组30颗;分别使用传统去龋方法和伢典化学-机械去龋法对各组30颗离体牙进行去龋操作并用玻璃离子材料进行充填;然后再将各组30颗牙分为2个亚组(临床装亚组,家庭装亚组),分别使用超越冷光美白剂临床装和家庭装对离体牙进行漂白。用染料渗入法对漂白后的离体牙充填体的微渗漏情况进行检测,测量其染料渗透深度,并进行统计分析。结果伢典去龋组充填体的染料渗透深度均小于传统去龋组,差异有统计学意义(P<0.05);传统去龋组与伢典去龋组中家庭装亚组充填体的染料渗透深度均小于临床装亚组,差异有统计学意义(P<0.05)。结论伢典去龋充填体的稳定性优于传统去龋;冷光美白剂家庭装漂白牙齿对充填体微渗漏的影响小于临床装。

Objective To evaluate the effect of different caries removal and bleaching methods on the mieroleak- age of filling material and teeth in vitro by comparing the depth of the microleakage. Methods A total of 60 healthy teeth removed for orthodontic reasons were included. After artificial caries production, these teeth were randomly divided into traditional caries removal group （n = 30） and Carisolv chemo-mechnical caries re- moval group （n = 30）. After caries removal and filling with glass ionomer cements, the 30 teeth in each group were divided into two subgroups, i.e. cold light whitening clinic pack subgroup and family pack subgroup. Af- ter bleaching, the dye penetration method was used for the detection of microleakage. The depth of dye pene- tration was measured and compared between these groups. Results The depth of dye penetration in the Cari- solv caries removal group was significantly smaller than that in the traditional caries removal group （P〈0.05）. In both caries removal groups, the depth of dye penetration in the family pack subgroup was significantly smaller than that in the clinic pack subgroup （P〈0.05）. Conclusion The method of Carisolv caries removal has better stability compared with the traditional method, and the cold light whitening family pack has a smal- ler effect on the microleakage of filling material than the clinic pack.