浙江省温州市鹿城区6～11岁儿童磨牙-切牙釉质矿化不全调查

Investigation of molar-incisor hypomineralization among children from 6 to 11 years in Lucheng District, Wenzhou City

目的：了解浙江省温州市鹿城区6~11岁儿童磨牙-切牙釉质矿化不全（molar-incisor hypomineralization,MIH）的患病情况。方法：选取4个第一恒磨牙都已完全萌出的6~11岁儿童988名,按年龄分为6组,依据欧洲儿童牙科协会制定的标准对其进行诊断,详细记录MIH患牙的牙位及严重程度。采用SPSS13.0软件包对数据进行统计学分析,各年龄组间MIH严重程度比较及上、下颌第一恒磨牙及恒切牙MIH患病率的比较均采用Kruskal-Wallis检验,MIH严重程度与年龄的相关关系采用Spearman相关分析。结果：MIH患病率为25.5%,轻症MIH为最主要病损。各年龄组间MIH严重程度有显著差异（P〈0.05）,MIH严重程度与年龄之间呈正相关关系,相关关系密切（rp=0.534）。各MIH患牙在上、下颌的分布无显著差异（P〉0.05）。结论：浙江省温州市鹿城区6~11岁儿童具有较高的MIH患病率,但以轻症病损为主。MIH的严重程度有随着年龄增加而加重的趋势。

PURPOSE： To investigate and analyze the prevalence and severity of molar-incisor hypomineralization（MIH） among children from 6 to 11 years old in Lucheng district of Wenzhou city.METHODS： Children aged 6 to 11 years（n= 988） with all four-first permanent molars erupted were evaluated according to the European Academy of Paediatric Dentistry（EAPD） criteria.Examiners recorded the severity and position of each tooth diagnosed with MIH.SPSS 13.0 software package was used for analyze.Kruskal-Wallis test was used to determine the differences in the defect severity among different ages and the difference in the prevalence of MIH between the upper and lower molars or between the upper and lower incisors.Spearman test was used to test the association of the MIH-defect severity with the age of children.RESULTS： Molar-incisor hypomineralization was present in 25.5% of the 988 children,and the majority of the defects presented were mild.There were significant differences among the six age groups with the severity of MIH（P 0.05）,but no significant difference was found in the distribution of the MIH defect between the maxilla and the mandible（P0.05）.The severity of MIH increased along with the aging of children（r p =0.534）.CONCLUSIONS： Despite the high prevalence of MIH,the severity of the defects was mild.The results indicate a positive association between the severity of MIH and the age of children.