Prevalence of Class II Division I Subdivision Malocclusion Amongst School Childern in The Chennai City

M CSainath, Sindhuja Krishnan


This study is to assess the prevalence of class II div 1 subdivision amongst school children of Tamil origin in Chennai city.
The aim of this study is to determine the prevalence and frequency of class II Division 1 Subdivision malocclusions amongst school children in the age group of 13 – 15 years of Tamil origin. The subjects were screened and selected from three zones of Chennai corporation schools i.e, North, Central and South. Intra oral and extra oral examinations were conducted and diagnosis were made by Principal investigators in the Department of Orthodontics and Dentofacial Orthopaedics TNGDC&H, Chennai.

A total of 1585 patients were screened. All subjects had full complement of permanent teeth. Patients with the history of previous orthodontic treatment, presence of carious teeth and extraction of permanent teeth, congenital malformation and systemic diseases were excluded from the study.
Along with the clinical examination of subject dentition in centric occlusion, intra oral and extra oral photographs and lateral cephalometrics, orthopantomography radiographs were taken and study models were prepared to determine the distribution of type 1 type 2 class II div 1 subdivision among the school children with regard to the gender and involvement of the left and right side of the dental arches. 


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