Fluoride in the water resources in the Tam Diep, Vinh Quynh, Dinh Cong and Van Phuc, Thanh Tri Hanoi

Some indicators of the water from rain, well, river, pond, lake drilling well, especially fluoride in the contaminated water resources in Vinh Quynh and Tam Diep communes and Van Phuc, Dinh Cong communes (control), Thanh Tri district, Hanoi were analysed. The concentration of fluoride, PH, and water’s hardness- and the rate of the enamel disorder in children with ages of 6-12 in Tam Diep and Van Phuc commune were determined. The results have shown that the concentration of fluoride in all water resources was low and threr is a significant difference from the contaminated areas and control.

Some opinions of the microbial flora in the gingival fluid and caries

A study aimed at the determination of the microbial flora in the gingival fluid and carries and paradontal bursal fluid. 30 persons in Dinh Dong commune, Thanh Tri district Hanoi classified as age, gender participated the study. The results have shown that there was a balance of the microbial flora in the mouth and gingival fluid and carries and paradontal bursal fluid. The imbalance occurred when gingivitis or periodontitis appeared. The highest increased microbials were anaerobic microbial and spirillum.