Screen time and Sleep Quality among College and University Students of Karachi / Tempo de tela e qualidade do sono entre estudantes universitários de Karachi

Objectives: To assess the relationship between screen times and sleep quality of the age group 17-24. Methodology: This is a cross-sectional study. The study was conducted on students of Colleges and universities in Gulshan-e-Iqbal Town Karachi. A total of 600 undergraduate students were approached in colleges and universities of Gulshan Town, Karachi. The sampling technique was Multi Staged sampling. The research instrument comprised of 3 parts i) Demographic profile, ii) Sleep quality measures and iii) Screen time usage measures. Results: The mean total hour of sleep was 6.7 ± 1.5. The Mean Cumulative score of the components of the questionnaire was 7.47 ± 3.56, while 174 (29%) have Normal Sleep quality and 426 (71%) have poor sleep according to the questionnaire. The odds ratio suggests there were 4.23 times higher chances of poor sleep quality in students whose screen time was more than 2 hours on weekdays as compared to other students. (OR: 4.23, 95% CI: 2.66-6.72). The odds ratio suggests there were 24.15 times higher chances of poor sleep quality in students whose screen time was more than 2 hours on weekends as compared to other students (OR: 24.15, 95% CI: 11.192-52.11). Conclusion: As, negative impacts were determined within sleep quality, and increased screen watching of multiple versions of the devices (screen time), influencing the commended level of screen watching among university and college students (age 17-24) is an affair of public health.

Objetivos: Avaliar a relação entre o tempo de tela e a qualidade do sono de estudantes universitarios na faixa etária de 17 a 24 anos. Metodologia: Este é um estudo transversal. O estudo foi realizado em estudantes de faculdades e universidades em Gulshan-e-Iqbal Town Karachi. Um total de 600 alunos de graduação foram abordados nessas instituicoes. A técnica de amostragem foi a amostragem Multi Staged. O instrumento de pesquisa compreendeu 3 partes i) Perfil demográfico, ii) Medidas de qualidade do sono e iii) Medidas de uso do tempo de tela. Resultados: A média de horas totais de sono foi de 6,7 ± 1,5. A pontuação média cumulativa dos componentes do questionário foi de 7,47 ± 3,56, sendo 174 (29%) com qualidade de sono normal e 426 (71%) com sono ruim, de acordo com o questionário. O odds ratio sugere que houve 4,23 vezes mais chances de má qualidade do sono em alunos cujo tempo de tela era superior a 2 horas durante a semana, em comparação com outros alunos (OR: 4,23, IC 95%: 2,66-6,72). O odds ratio sugere que houve 24,15 vezes mais chances de má qualidade do sono em alunos cujo tempo de tela era superior a 2 horas nos finais de semana em comparação com outros alunos (OR: 24,15, IC 95%: 11,192-52,11). Conclusão: Como os impactos negativos foram determinados na qualidade do sono e aumento da visualização da tela de várias versões dos dispositivos (tempo de tela), influenciar o nível recomendado de visualização da tela entre universitários e estudantes universitários (idade 17-24) é uma questão de saúde pública.

Sealing ability of two commonly used root canal sealers with and without smear layer

AIM: The aim of current research was to find out the sealing ability of two commonly used sealers in the presence and absence of smear layer at different time interval. MATERIAL AND METHODS: Total of 180 single rooted vital teeth were used. Transversal section was made with the help of digital slow speed cutting saw to divide the root and crown part. After removal of crown roots part was instrumented and prepared. The 180 teeth were randomly divided into two equal groups (n=90) 1 and 2. In group 1 the smear layer was kept intact but it was removed from group 2 with EDTA (17%). Group 1 was then divided into two sub-groups, A1, A2. Group 2 was again separated into two sub-groups, B1 and B2. Each sub-group contained of 45 samples. In sub-groups A1 and B1, AH Plus sealer, in sub-groups A2 and B2, Ketac-endo sealer and cold lateral condensation technique was used for obturation with gutta percha. All samples were kept in an incubator at 37°C for 24 hours, with help of nail polish/varnish all samples root surfaces was painted only excluding apical area after words each sub group were further divided in to three groups of 15 to represent immersion periods of 7,15 and 30 days. All samples were then kept in 5 % methylene blue dye solution at 37o c for their respective time periods. After specific time period, the roots of every group were cut longitudinally and evaluate under a stereomicroscopes to evaluate apical micro leakage in millimeter. Data was subjected to Repeated measure ANOVA with post-hoc analysis using Tukey and bonferroni tests. RESULTS: Overall analysis indicated significant reduction in sealing ability canals in with and without smear layer over different time periods (p <0.0001). CONCLUSION: Current study has concluded that AH plus sealer provides significantly better seal in the absence of smear layer than in the presence of smear layer in addition it gave better seal than Ketac-Endo sealer in the absence and presence of smear layer.

Effect of two different commonly available energy drinks on surface micro hardness of tooth color restorative materials

AIM: The objective of present study was to assess the effect of commonly used energy drinks on surface micro hardness of tooth color restorative materials. MATERIAL AND METHODS: Sixty discs of all material were prepared in polytetrafluoroethylene mold which was 10 mm in diameter and 2 mm in thickness. Two groups were made for each material containing 10 discs; G1/G2 (vitofil), G3/G4 (vitremere), G5/G6 (Filtek Z350). After 24 hours, the discs were polished. Group 1, group 3 and group 5 were immersed in red bull for 2 minutes during whole expereiment. Group 2, group 4 and group 6 were immersed in jolt cola for 2 minutes during whole expereiment. Microhardness test were performed in digital micro hardness tester before and after immersion at different time interval. The results were statistically analyzed with the help of two-way ANOVA with repeated measurement and Tukey's test. RESULTS: According to time interval for vitofil and vitremere there is insignificant difference between baseline and day 1 surface micro hardness values (p>0.001). Significant difference is seen between baseline micro hardness and day 7 day 14,day 30 (p<0.001). Inverse is true for Filtek Z350 there is significant difference between base line and day 1 micro hardness values(p<0.001). The difference between base line, day 7, day 14 and day 30 is insignificant (p>0.001). According to immersion media there is insignificant difference between both of them (p>0.001). CONCLUSION: The effect of energy drinks on the surface micro hardness of a restorative material depends on the duration of contact time and the material composition not on the type of drink.