Introduction: Status of oral health depends on diet that we consume on daily basis. Diet does not predispose tissues of oral cavity at risk but it’s the change in pH that leads to acidic oral environment causing dry mouth, tooth decay, erosion and bad breath. Potential role of various foods in enamel demineralization has been evaluated. The decreased pH for longer durations ultimately leads to enamel dissolution and lesion formation. the current study is aimed to evaluate the change in pH in oral cavity after consumption of Milk, Milk with added sugar, carbonated drink and fresh lemon juice. Methodology: It was a cross sectional study conducted at tertiary care hospital of Karachi from November 2020 to January 2021. An elementary school was contacted for permission access to recruit the teen ager students (13-16year) of either gender. The total calculated sample size at 50% proportion of school strength was 140 students that were further divided into 4 groups i.e., 35 students / group. Recruited participants were educated regarding the study protocols and aims moreover they were divided into groups (Group A, B, C and D) randomly and milk, milk with added sugar, carbonated drink and fresh lemon juice was given to participants to drink in respective order of grouping. After consumption of specific drink pH readings were recorded after 15 minutes, 30 minutes, 1 hour and 2 hours. Saliva was obtained in sterile container for 5 times from one participant. The salivary pH was directly estimated using the digital pH meter (SIGMA pH meter: model number 131) calibrated with buffers of pH 4 and 7. Results: The mean age of participants was 13.9 ± 2.3 years. There were 89 (63.5%) females and 51 (36.4%) males. Most of the participants were from 8th and 9th class. The decrease in pH of saliva after consumption of either drink was observed in all groups when compared to controls. The paired t test analysis revealed a significant (p-value=0.002) decrease in pH after 15 minutes and that acidic level of pH was maintained for 30 minutes (p-value=0.037). ANOVA analysis showed insignificant relation among all groups after having beverages. As after two hours salivary pH returned to normal range when compared to control. Conclusion: There was no any difference in salivary pH after consuming milk, milk with added sugar, carbonated drink and fresh lemon juice after 15 minutes. After 2 hours pH of saliva reverts to its normal value.
Aim: To determine the knowledge and attitude of medical undergraduates towards COVID-19. Study Design: Cross-sectional. Place and Duration of Study: Study was conducted at Quaid-e Azam medical college from June 2020 to August 2020. Methodology: The undergraduate students enrolled in 1st year to final year of MBBS were included in the study. A proforma was prepared by using the Google Docs and validated before starting the study. The reliability of the questionnaire was 0.78. Data was analyzed by using Statistical Package for the Social Sciences (SPSS) version-20. All the qualitative variables were presented as frequency and percentages while quantitative as mean and standard deviation. Knowledge score was compared with demographic variables by using independent t-test and one-way ANOVA test, as appropriate. p-value less than 0.05 was considered as significant. Results: About 56% of the participants were female while remaining 44% were male, majority of them i.e. 51.6% were mediocre. Majority were from 3rd year and final year i.e. 25.2% and 24.4% respectively. Looking over the mean knowledge score the final year students having more knowledge about COVID-19 then the other students from different years, among them the female participants were having more knowledge score then their male counterparts with significant highly p-value. Comparing knowledge score with socioeconomic status reported that upper class was having higher score. Over-all 74% of final year students answered correctly to all of the questions regarding knowledge towards COVID-19. Considering specifically the attitude of medical students towards COVID-19, majority of the students including all years of MBBS, like to get more information about COVID-19. Conclusion: It can be concluded that Pakistani undergraduate students of MBBS are having good knowledge about COVID-19. They are also well-aware of the protective measures which should be taken. In comparison, final year students having the higher level of knowledge then the students of other years of MBBS. All the students having positive attitude for stopping COVID-19.
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