摘要
目的调查分析小学二年级学生第一恒磨牙情况,为龋病防治工作提供参考。方法对广州市番禺区10所小学共1 655名二年级学生第一恒磨牙萌出情况、窝沟情况进行调查研究。结果 1 655名7~8岁小学二年级学生中,第一恒磨牙未萌出或未完全萌出的比例为26%。适合做窝沟封闭的人数占67.4%,其中公办学校占70.1%,民办学校占65.5%,差异有统计学意义（χ2=3.908,P=0.048）。适合做窝沟封闭牙数占总第一恒磨牙数的37.9%,其中上颌适合窝沟封闭的第一恒磨牙比例（46.2%）高于下颌（29.7%）,差异有统计学意义（χ2=189.848,P〈0.001）。结论小学二年级学生未萌出或未完全萌出的第一恒磨牙所占比例高,适合作窝沟封闭的牙数比例低,建议放宽免费窝沟封闭的年龄范围。
Objective To analysis the condition of pit and fissure sealing for the first permanent molar in students of the second grade, and provide references for the caries prevention of the first permanent molar. Methods 1655 students from 10 primary schools, aged 7 to 8 years old in Panyu district of Guangzhou were se]ected. The eruption, pit and fissure status of first permanent molars were examined. Results The unerupted/incomplete eruption rate of first permanent molar reached up to 26% in the second-grade students, aged 7 to 8 years old. 67.4% students were adapt for pit and fissure sealing, with higher rate in public schools （ 70.1% ） than in private school （ 65.5% ） （X2 = 3. 908, P = 0. 048 ） ; only 37.9% teeth were adapt for pit and fissure sealing with higher rate in maxillary teeth （46.2%） than in mandibular teeth （29.7%） （X2 = 189. 848,P 〈 0. 001 ）. Conclusion Due to high unerupted/incomplete eruption rate of the first permanent molar in the second-grade students, the late of teeth adapt for pit and fissure sealing was low, pit and fissure sealing projects in Panyu region were suggested to cover more students.
出处
《广东牙病防治》
2014年第12期638-640,共3页
Journal of Dental Prevention and Treatment
