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目的分析中国7~9岁儿童第一恒磨牙萌出及患龋情况,探讨儿童实施窝沟封闭的适宜年龄。方法对2014—2015年进行口腔检查的560 121名儿童检查结果进行分析。结果 7、8、9岁儿童第一恒磨牙完全萌出率分别为79.53%、89.84%和93.81%,第一恒磨牙患龋率分别为12.18%、16.83%和19.61%,萌出率和患龋率均随年龄上升逐步升高;女性第一恒磨牙完全萌出率和患龋率均高于男性;第一恒磨牙龋齿好发牙面依次为:下侧牙与上侧牙的颌面、下牙的颊面,上牙的舌面。结论 7~9岁儿童第一恒磨牙完全萌出率高,患龋情况严重,应考虑提前窝沟封闭的实施年龄。
Objective To analyze the eruption and caries status of the first permanent molars in children aged 7-9 years in China and to explore the appropriate age of children for implementing pit and fissure occlusion. Methods The results of 560 121 children who underwent oral exams during 2014-2015 were analyzed. Results The complete eruption rate of the first permanent molars in children aged 7, 8 and 9 years were 79.53%, 89.84% and 93.81% respectively. The prevalence of dental caries in the first permanent molars was 12.18%, 16.83% and 19.61% respectively. The eruption rate and caries prevalence With the increase of age gradually increased; women’s first permanent molar full rate of eruption and caries prevalence were higher than men; first permanent molars tooth decayed tooth surface were: lower teeth and upper teeth of the maxillofacial and lower teeth The buccal surface, upper teeth tongue surface. Conclusions The first permanent molars in children aged 7 ~ 9 years have a high rate of complete eruption and severe caries. The implementation age of premature pit and fissure sealant should be considered.