中国美容医学2024，Vol.33Issue(10)：22-25,4.
杭州市2～6岁儿童乳牙龋病的流行病学调查分析和乳牙预成冠的力学实验研究
Epidemiological Investigation and Mechanical Experiment of Deciduous Tooth Precrown in 2-6 Year Old Children in Hangzhou City
摘要
Abstract
Objective To investigate the regularities of caries distribution in the primary dentition of children in Hangzhou,China.To measure the compressive failure resistance of primary mandibular second molar crowns from three different manufacturers-resin preformed crown,zirconia preformed crown and glass preformed crown.Methods A total of 1 000 children aged 2-6 years were selected from the children's Stomatology department in the west of Hangzhou Stomatology Hospital.Resin,zirconia and glass-ceramic deciduous teeth were preformed on the resin model of mandibular second deciduous molar with resin adhesive respectively.The compressive strength test was carried out on the universal material test machine,and the compressive destructive force value of the specimen was recorded.SPSS 24.0 statistical analysis software was used for statistical analysis of the data.Results Right mandibular second primary molars are at highest risk of caries,followed by left.Primary molars suffer from higher caries than primary anterior teeth.The distribution of caries concentrated on the occlusal surface,followed by the mesial and distal proximal caries,and lingue caries have the lowest rate.3 group of compressive failure resistance respectively:resin group(694.85±292.20)N,zirconia group(537.31±152.03)N,glass group(613.73±303.92)N.The comparison between any two of them has no statistical significance(P＞0.05).Conclusion The primary tooth caries distribution has specificity in tooth surface.Primary molars have a high rate of caries,and there are many caries surfaces.The forces required to fracture the resin crowns were greater than the glass porcelain and zirconia crowns.关键词
龋病/乳牙/发病率/瓷预成冠/抗压缩破坏力Key words
caries/primary teeth/prevalence/porcelain preformed crown/compression failure resistance分类
医药卫生引用本文复制引用
孙晓美,刘天爽,方力,刘小雅..杭州市2～6岁儿童乳牙龋病的流行病学调查分析和乳牙预成冠的力学实验研究[J].中国美容医学,2024,33(10):22-25,4.基金项目
杭州市医药卫生科技项目(编号:B20200632) （编号:B20200632）
