Abstract
Introduction: Esthetic is one of the outcome that is expected from orthodontic treatment. In orthodontic practice, lip protrusion has been observed with proclined upper and lower incisors in bimaxillary protrusion. Such lip protrusion has been shown to be reduced with backward movement of the anterior teeth, which often accompanies premolar extraction. Hence the aim of our study is to find out prevalence of lip competency among Nepalese Adolescents with different ethnic group 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. An evaluation 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.
 Result: Out of 935 screened students, 89.6% had competent lips and 10.4% had Incompetent lips. Female showed 91.9% of competent lips and 8.1% of incompetent lips. Male showed 87.8% of competent lips and 12.2% of incompetent lips. Among different ethnic group for lip competency, Advasi/Tharu showed 0.2%, Brahmin/chettri showed 61.6%, Dalit showed 0.6, janajati- Hi showed 35.8%, Madhesi showed 0.7%,Muslim showed 0.6% and others showed 0.3%. Among Brahmin/chettri 56.4% showed competent lips, 5.22% showed incompetent lips. However among Janajati-Hi 30.7% showed competent lips, 5.12% showed incompetent lips.
 Conclusion: The Prevalence of competent lips was 89.6% and incompetent lips was 10.4%. Among Genders both female and male showed higher percent of competent lips than incompetent lips. However competent lips were more associated with females. Among ethnic groups , Brahmin/chhetri have 61.6% of lip competency whereas Janajati-Hi have 35.8%. Rest of the ethnic group have less than 1% of lip competency. Among Brahmin/chettri 56.4% have competent lips, 5.22% have incompetent lips where as Janajati-Hi 30.7% have competent lips, 5.12% have incompetent lips.
Highlights
Esthetic is one of the outcome that is expected from orthodontic treatment
Competent lips were more associated with females
Rest of the ethnic group have less than 1% of lip competency
Summary
Lip protrusion has been observed with proclined upper and lower incisors in bimaxillary protrusion Such lip protrusion has been shown to be reduced with backward movement of the anterior teeth, which often accompanies premolar extraction. Lip protrusion has been observed with proclined upper and lower incisors in bimaxillary protrusion.[1] Such lip protrusion has been shown to be reduced with backward movement of the anterior teeth,[2,3,4] which often accompanies premolar extraction.[5] The evaluation of lip protrusion is important for making an orthodontic diagnosis, including determining the need for tooth extraction. A subject is classified as having competent lips when his lips are in light contact at clinical rest.[16,17,18,19,20] Lip competence implies a tonus in the lip muscles to provide passive lip Orthodontic Journal of Nepal, Vol 9 No 1, January-June 2019 45
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
