A survey on the prevalence of impromptu crimes among 1,238 36-year-old children in Tianqiao District, Jinan City
Keywords:
Children aged 3 to 6 years; disease status; Jinan City; reflexes; overpass; feeding methods; correction of bad habits; orthodontics; disease investigation; malformed childrenAbstract
In the spring of 1993, we investigated the prevalence of cross-bite deformity in 1,238 children aged 3 to 6 years old in 6 kindergartens in Tianqiao District, Jinan City. The report is as follows. 1 Objects and Methods The deciduous teeth (occlusion) of 3 to 6 years old were selected as the objects of investigation. Natural light and conventional inspection instruments were used during the investigation. According to the diagnostic standards of "Orthodontics" edited by Huang Huangfang, and according to Mao Xie's malocclusion (occlusion) classification method Make a diagnosis and fill in the questionnaire (53 copies were sent and 48 were received). 2. Results and analysis 2.1 1238 people (702 men and 536 women) were surveyed, and 53 people (27 men) suffered from crossbite. , 26 women). The prevalence rate is 4.3%, and the prevalence rates for men and women are 3.8% and 4.9% respectively, x~2=0.76, P>0.05,
