RESUMO
OBJECTIVES: Many countries have enforced lockdowns on their populations due to the coronavirus disease 2019 (COVID-19) pandemic. This study aimed to assess the effects of the lockdown on dental students. METHODS: A longitudinal, repeated cross-sectional study was conducted to evaluate psychological problems experienced by dental students during the COVID-19 lockdown in Saudi Arabia. The dental students were selected from different universities using 2-stage cluster sampling. The validated Arabic version of the 21-item depression, anxiety, and stress scale questionnaire was distributed at the beginning and end of the lockdown. Mann-Whitney U and Kruskal-Wallis tests were used as appropriate. Chi-square test was used to compare the proportions between the sociodemographic data, and logistic regression analysis was used to identify variables associated with the students' responses. RESULTS: A total of 1287 respondents participated in this study (695 first-survey respondents, 592 second-survey respondents). There were longitudinally significant differences in the students' mental health outcomes based on gender, university, class year, and survey time during the COVID-19 lockdown. The lockdown increased the likelihood of female, single, and junior students experiencing stress. The students who lived alone recorded a high chance of elevated levels of depression, anxiety, and stress, which showed a significant longitudinal reduction during the lockdown. Moreover, the lockdown increased the likelihood of mental health problems among the students staying in households of two persons or two-five persons. CONCLUSIONS: This study indicates the importance of considering the detrimental mental health consequences on dental students in the event of future pandemics.
RESUMO
Dentinal hypersensitivity (DH) is a condition that causes patient discomfort. To evaluate the clinical efficacy of Gluma, fluoride varnish and Tetric N-Bond self-etch system in relieving DH immediately and over 30 days following a single topical application. The present randomized clinical trial was conducted on 55 patients with an age range 20-49 years. 70 teeth in total were incorporated and randomly assigned to the three groups. Parameters examined were: Tactile, air blast, and cold stimuli. VAS was used to assess tactile stimulus whereas the Schiff Cold Scale for air blast and cold stimuli. DH was evaluated immediately, at two weeks and 1 month follow up. Gluma showed a statistically significant reduction in DH scores over other materials. It was concluded that Gluma have statistically significant results over other materials in relieving DH immediately and over 30 days following a single topical application.Trial Registration: Clinical Trials.gov Identifier: NCT04351412, King Abdulaziz University Protocol Record 129-09-19. Registered 17 April 2020 - Retrospectively registered. http://ClinicalTrials.gov/NCT04351412 .
