A Cross sectional study was done among the girl students of primary
school in Buraydah City in the age group of 7-9 yrs with sample size of 401 and found that among the 401 study
subjects, dental caries are prevalent upto 80.80% in primary teeth and 29% in permanent teeth.
Usually, the stratospheric ozone show its significance in the variability of mesospheric tides in normal days over the low-latitude region. But during sudden stratosphere warmings, the water vapor and ozone over the polar region change and shows some different effects on mesosphere tides. In the present study, G. Venkata et al have provided the unusual changes in both water vapor and ozone over Antarctica and their role in altering the mesospheric tides. Read More
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