author(s)
Waikhom Ranjana Devi, Thangjam Sophiya Devi, Rukshar Naushad Ansari, Rumanas Aktar, Rosie Thamba, Tarali Das and Ummey Sulaima

abstract
Dental Problems are the major problem in many Countries, especially in developing Countries. The Philippines have the worst Decayed, missing and filled teeth. About 90%of their citizens are suffering from tooth decay. India and Australia ranked second and third in the list. Caries is the most prevalent and chronic oral disease specially seen in childhood age. The main objectives of the study is to assess the effectiveness of video assisted teaching on Dental Hygiene Among Primary school children in selected Primary schools, Guwahati. Quantitative research approach was used for this study. The research design was pre-experimental research design. The sample comprised of 50 primary school children. The school children were selected by purposive sampling technique. The study was carried out in Betkuchi High School in Guwahati, Assam. The data collection was done between 12-10-2023 to 10-11- 2023. Formal written permission was obtained from the authorities to conduct the study. Data was collected by administering a self-administered knowledge questionnaire. The data was analyzed by using inferential statistics. Karl Pearson correlation co-efficient test was used to find the association between the pre-test level of knowledge with selected socio-demographic variables. The results of the study shown that pre-test level of knowledge were 47(94%) primary school children had inadequate knowledge, followed by 03 (6%) had moderately adequate knowledge and after intervention results of the study shown that post-test level of knowledge 40 (89%) primary school children had adequate knowledge, followed by 10(20%) had moderately adequate knowledge. The overall mean knowledge score of pre-test was 11.32 and post-test was 22.50 and mean difference was 11.180. The obtained ‘t’ value 33.1076 is greater than the table value at 0.05 level of significance. It shows that there was significant difference between pre-test and post-test knowledge scores of school children regarding dental hygiene. Thus the research hypothes is is accepted. The significant association between the pre-test level of knowledge with selected socio-demographic variables like age(ꭓ²=1.754), gender (ꭓ²=0.086), religion (ꭓ²=0.187), educational qualification (constant), type of family (ꭓ²=0.285), place of residence (ꭓ²=0.891), number of brushing in a day (^ꭓ2=0.114), duration of brushing (ꭓ²=0.190),source of information (ꭓ²=1.943), vany dental caries(ꭓ²=1.579) were not significant at 0.05 level. Thus it can be interpreted that there is no significant association between the pre-test level of knowledge with the selected socio- demographic variables. Thus, the research hypothesis is rejected. The findings of this study support the need for conducting an awareness on dental hygiene among primary school children. The study proved that majority of the students had imparted adequate knowledge on dental hygiene.