West China Journal of Stomatology ›› 2019, Vol. 37 ›› Issue (5): 541-546.doi: 10.7518/hxkq.2019.05.017

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Prevalence of malocclusion among 5 387 12- to 14-year-old adolescents in Jiangxi province, China: an epidemiological study

Xu Titi1,2,Zeng Liwei2,3,Wen Jianqiong1,2,Wan Li1,2,Ou Xiaoyan1,2()   

  1. 1.Dept. of Preventive Dentistry, The Affiliated Stomatological Hospital of Nanchang University, Nanchang 330006, China
    2.The Key Laboratory of Oral Biome-dicine, Jiangxi Province, Nanchang 330006, China;
    3.Dept. of Prosthodontics, The Affiliated Stomatological Hospital of Nanchang University, Nanchang 330006, China
  • Received:2019-04-15 Revised:2019-07-02 Online:2019-10-01 Published:2019-10-15
  • Contact: Xiaoyan Ou E-mail:xiaoyanou@hotmail.com
  • Supported by:
    The Development and Major Project of Jiangxi Provincial Department of Science and Technology(20152ACG70023)

Abstract:

Objective We provided baseline data for oral public health through epidemiological surveys to investigate the prevalence of malocclusion and orthodontic treatment proportion in 12- to 14-year-old adolescents in Jiangxi province, China. Methods Multi-stage random cluster sampling was used. A total of 5 387 12- to 14-year-old adolescents were exa-mined by three professional dentists according to Angle’s classification of malocclusion. The subjects were recruited from 30 secondary schools in five counties in Jiangxi Province. Results were statistically analyzed by SPSS19.0. Results The prevalence of malocclusion was 79.67% among adolescents aged 12-14 years in Jiangxi province. The composition ratios of ClassⅠ, Class Ⅱ Division 1, Class Ⅱ Division 2, and Class Ⅲ malocclusion were 30.96%, 16.36%, 12.78%, and 19.13% respectively. ClassⅠmalocclusion had the highest composition ratio, and the most common clinical manifestation of malocclu-sion was dentition crowding with a prevalence of 91.30%. The prevalence rate of malocclusion was higher in boys than in girls at 81.16% and 78.21%, respectively (P<0.05). This condition had different prevalence rates in Nanchang, Yi-chun, Jiujiang, Shangrao, and Ganzhou (P<0.05) with the highest in Nanchang and lowest in Ganzhou. Malocclusion was related to caries, and its prevalence rate was higher in patients with caries than in those without caries (P<0.05). The ortho-dontic rate of malocclusion was 2.63%, and the value was higher for girls than that for boys (P<0.05). The rate of orthodontic in urban areas was higher than that in rural areas (P<0.05). Conclusion Compared with local and international findings on malocclusion of adolescents, high prevalence and low orthodontic rate were found in Jiangxi province. Strengthening the combination of prevention and treatment is important for the physical and mental health of adolescents. We should actively conduct oral health education, popularize the knowledge of malocclusion, and actively treat caries.

Key words: malocclusion, adolescents, prevalence, caries, orthodontic treatment

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