Prevalence of malocclusion and occlusal traits in the early mixed dentition in Shanghai, China

PeerJ

article

Xin Yu¹  Hao Zhang²  Liangyan Sun²  Jie Pan²  Yuehua Liu²  Li Chen² 

[1] Department of Pediatric Dentistry, Shanghai Stomatological Hospital, Fudan University;Oral Biomedical Engineering Laboratory, Shanghai Stomatological Hospital, Fudan University;Department of Preventive Dentistry, Shanghai Stomatological Hospital, Fudan University;Department of Orthodontics, Shanghai Stomatological Hospital, Fudan University;Minhang Preventive Dental Clinic

关键词: Malocclusion;    Early mixed dentition;    Prevalence;    Angle classification;    Overjet;    Open bite;    Crossbite;    Crowding;    Spacing;   

DOI  :  10.7717/peerj.6630

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

BackgroundEpidemiological data on malocclusion among Chinese children are scant. The aim of this study was to provide detailed information on the prevalence of malocclusion in early mixed dentition children in Shanghai, China.MethodsA cross-sectional survey was conducted from September 2016 to April 2017, and 2,810 children aged 7- to 9- years were selected from 10 primary schools by cluster random sampling. Several occlusal parameters, including Angle molar relationship, overjet, overbite, open bite, anterior and posterior crossbite, midline displacement, scissors bite, and teeth crowding and spacing, were clinically registered by five calibrated orthodontic dentists.Results4 mm) affecting 9.5%. Girls showed a higher prevalence of anterior crowding and a lower frequency of teeth spacing than boys.ConclusionsOur study demonstrated that malocclusion is prevalent among children in the early mixed dentition, and more health resources should be warranted to meet the challenge of prevention or early intervention of malocclusion.

【 授权许可】

CC BY