Studying the demand in treatments of dental caries and periodontitis in twelve and fifteen year old students at Khanh Hoa province provides the data as the proof to the management bureaucrats; so that it helps them to propose the strategy for dental hygiene and oral health care for Khanh Hoa residents. A group of 1.096 students aged twelve and fifteen participated in the study using stratified random sampling method. The data was then analyzed with SPSS 16.0 software. The demand in treatments of periodontitis in twelve and fifteen year old In the group of twelve year' old students: 37.85 percent of the students were taught with proper oral hygiene; 52.64 percent of the students were treated with scaling procedure, which removed all traces of plaque. In the group of fifteen year old students: the percentages were 76.89 percent and 72.91 percent, respectively. It is concerned that the sextant means of tooth calculus deposit in twelve year old is 1.53 and that of gum bleeding is 1.96. In the group of fifteen year old, the means are 2.43 and 2.95 respectively.
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