An oral health survey for 6984 pupil (15 and 17 age) of 4 senior high school representative 29 districts of Hanoi after reunification the results of the oral health: - The rate of decay primary tooth of pupils is 14,2 percent
15 age is 12,41 percent. - The rate of gingivitis of pupils is 16,04 percent
15 age is 17,44 percent. - DMF is 0,32
The tooth decay is high but the filled tooth rate was low. - The rate of gingivitis in old Ha Tay is higher than old Hanoi.