儿童第一恒磨牙不同部位早期脱矿定量分析

Quantitative Assay of Initial Demineralization at Different Sites on the First Permanent Molars of Children in China

目的 :探讨年轻恒磨牙的龋病敏感点位。方法 :采用激光荧光测定仪对 88名 6～ 7岁龋活跃儿童 (dmft≥ 5 )口腔中的第一恒磨牙不同点位进行脱矿程度的定量测定。每位受检者分 8个点位测试 ,即双下颌第一恒磨牙中央窝、颊沟 ,双上颌第一恒磨牙中央窝、舌沟。将所得数据由计算机STATA 5 0软件进行统计分析。结果 :所有被测点位均处于牙釉质龋的初期病损阶段 ;不同性别间相同点位脱矿程度无显著性差异 (P >0 0 5 ) ;左右侧第一恒磨牙相同点位脱矿情况无显著性差异 (P >0 0 5 )。在所测点位中 ,以双下颌第一恒磨牙中央窝脱矿程度最为严重 ,与其它所有点位均有显著性差异 (P <0 0 1)。结论 :龋活跃儿童应作为年轻恒牙龋预防的重点人群 ,下颌第一恒磨牙的中央窝应作为年轻恒牙防龋的重点部位。激光荧光测定仪可用于早期龋的诊断和监控。

Objective:The purpose of this study was to quantitatively evaluate the demineralization of the caries_vulnerable sites of first permanent molars, and identify the most caries_susceptible site in caries_active children.Methods: 88 caries_active children (dmft≥5) were selected in this study, in which 42 children are girls and 46 children are boys. Demineralization of central fossa, lingual groove of the bilateral maxillary first permanent molars, and the central fossa and buccal groove of the bilateral mandibular first permanent molars were evaluated using laser fluorescence system KaVo DIAGNOdent (Germany). Data were processed using software STATA 5 0.Results: All the tested sites were at the initial stage of enamel caries. There was no significant difference of demineralization between the same sites bilaterally (P>0 05), or between different genders (P>0 05). The central fossa of mandibular first permanent molar demonstrated significantly higher demineralization than other sites of first permanent molars (P<0 01). The demineralization of the maxillary central fossa was more severe than that of lingual grooves (P<0 05).Conclusion: The central fossa of first mandibular molar is the most important site for caries prevention in children. KaVo DIAGNOdent can be used for early incipient groove and fissure caries detection and monitoring in children.\;