ETHNICITY WISE PREVALENCE OF OVERJET AMONG NEPALESE ADOLESCENTS OF KATHMANDU VALLEY

Abstract

Introduction: Overjet is an extensive horizontal overlap of the incisal ridge of the upper teeth over the lower teeth and of the buccal cusp ridges of the posterior teeth with respect to their lower counterparts. Such a change is usually associated with facial muscle imbalance problems, resulting in an anteroposterior dentoskeletal relationship.

Aims and objective: To find out ethnicity wise prevalence of Overjet among Nepalese Adolescents of Kathmandu Valley

Materials& method: lt is a cross-sectional descriptive study.  The study population included 14-18 year-old adolescents studying in high school of all three districts of Kathmandu Valley. Anevaluation form was developed categorizing different levels of deep bite following WHO guidelines 1985 and accordingly data were recorded on it.

Statistical Analysis:Data were analyzed with descriptive statistics using the Statistical Package for the Social Sciences (SPSS for Windows, Version 23) in which p-values were calculated by Pearson Chi-Square Tests

Results: Out of 938 selected students 92.1% had Normal overjet, 5.8% had increased overjet, 1.8% severely increased overjet and 0.3% had most severely increased overjet. Female showed higher percentage of normal overjet. Ethenic group showed mixed findings.

Conclusion: Prevalence of Normal overjet was 92.1%, increased overjet was 5.8%, severely increased overjet was 1.8% and most severely increased overjet was 0.3%.

female showed higher percentage of  normal overjet and most severely increased overjet  than male whereas male  showed higher percentage of increased overjet and severely increased overjet than female. As per total count of participants among each ethnic group Advasi-Tar, Dalit, Madhesi and others showed 100% of normal overjet followed by janajati-Hi (94%) , Brahmin/chettri (90.8%) and Muslim (83.3%). Muslim (16.7%) showed higher percentage of increased overjet followed by Brahmin/chettri (6.6%) and Janajati-Hi (4.5)%. Brahmin/chettri showed higher percentage (2.2%) of severely increased overjet than Janajati-Hi (1.2%), where as both group showed same percentage of most severely increased overjet

Key words:  Overjet, ethnicity, High school students, Prevalence