华西口腔医学杂志2025，Vol.43Issue(4)：518-524,7.DOI:10.7518/hxkq.2025.2025161
儿童时期恒牙釉质显微硬度及微观结构研究
Research on the microhardness and microstructure of permanent tooth enamel in childhood
顾起弘 1姜文敬 2刘一静 1刘玲 1高黎1
作者信息
- 1. 郑州大学第一附属医院儿童口腔科,郑州 450052||郑州大学口腔医学院,郑州 450000
- 2. 郑州市人民医院口腔科,郑州 450000
- 折叠
摘要
Abstract
Objective Through the investigation of the microhardness and microstructure of permanent tooth enamel at various eruption stages during childhood,this research offers references for the early prevention of childhood dental caries.Methods Forty-five premolars extracted due to orthodontic reasons were collected and screened.These premo-lars were divided into three experimental groups according to the time since eruption:Group A(erupted for 0-1 year),Group B(erupted for 1-3 years),and Group C(erupted for 3-5 years).Additionally,the third molars that were extracted due to impaction and had not erupted were selected as the control group,with 15 teeth in each group.Samples were pre-pared,and the surface microhardness,microstructure,and elemental composition of the enamel were measured using Vickers microhardness tester,scanning electron microscope,and electron probe,respectively.Results Compared with that in the control group,the microhardness of enamel in groups A,B,and C increased with prolonged eruption time,the surface porosity structure decreased considerably,the contents of Na and Mg on the surface decreased,and that of F in-creased(P＜0.05).Conclusion The microhardness and microstructure of enamel in permanent teeth at different stages vary.Permanent teeth are at a substantially higher risk of caries within one year after eruption,and early prevention should be emphasized.关键词
儿童/年轻恒牙/釉质/萌出后成熟/微观结构Key words
children/immature permanent teeth/enamel/post-eruptive maturation/microstructure分类
医药卫生引用本文复制引用
顾起弘,姜文敬,刘一静,刘玲,高黎..儿童时期恒牙釉质显微硬度及微观结构研究[J].华西口腔医学杂志,2025,43(4):518-524,7.
