乳牙菌斑固相钙、磷、氟质量分数与患龋状况及摄糖频率的关系

Relationship between Ca,P and F concentration of plaque residues in the primary teeth and caries status,sugar exposure frequency

目的分析乳牙菌斑固相成分中钙、磷、氟质量分数与患龋状况及摄糖频率之间的关系。方法将93名北京城区3～5岁儿童根据患龋情况分为重症婴幼儿龋(S-ECC)组47人;无龋(CF)组46人。分别收集集合菌斑,应用原子吸收光谱、分光光度计和氟离子选择性电极法测定受试者乳牙菌斑固相成分中钙、磷、氟质量分数,并进行组间比较;对两组受试者每日摄糖频率进行调查,分析菌斑固相成分中钙、磷、氟质量分数与摄糖频率的关系,并在S-ECC组分析菌斑固相中钙、磷、氟质量分数与dmft、dmfs的关系。结果S-ECC组菌斑固相成分中钙、磷、氟质量分数均值低于CF组,但是差别没有统计学意义;S-ECC组患儿每日摄糖频率高于CF组;乳牙菌斑固相成分中钙、磷、氟质量分数与摄糖频率及dmft、dmfs值之间没有相关关系。结论CF组儿童与S-ECC组患儿相比,并没有显示出其菌斑固相成分中拥有更大的钙、磷、氟储库。

Objective To analyze the relationship between inorganic ingredients（Ca,P and F） concentration of plaque residues in the primary teeth and caries status,sugar exposure frequency.Methods Subjects were 93 of 3-5 years old children living in Beijing area.According to their caries status,they were classified into two groups： Severe early childhood caries（S-ECC） group and caries free（CF） group.Plaque samples were collected from subjects respectively.Ca,P and F concentration of plaque residues was measured by atomic absorption spectroscopy,spectrophotometer and fluoride electrode respectively.The information of daily sugar exposure frequency of children was obtained from a standardized questionnaire filled by their parents.The relationship between inorganic ingredients（Ca,P and F） concentration of plaque residues and daily sugar exposure frequency was analyzed and the relationship between inorganic ingredients（Ca,P and F） concentration of plaque residues and caries status in the S-ECC group was also analyzed.Results The mean values for Ca,P and F concentration of plaque residues were lower in the S-ECC group,but the difference was not statistically significant（P〉0.05）.The daily sugar exposure frequency in the S-ECC group was higher than that in the CF group.There were no relationships between Ca,P and F concentration of plaque residues and caries status（dmft,dmfs）,sugar exposure frequency in the primary dentition. Conclusion Plaque residues from CF subjects did not contain a greater pool of calcium,inorganic phosphorus,and fluoride ions than that from S-ECC subjects.