Aim: The aim of this study is to determine the factors affecting mouth breathing syndrome in children and to evaluate the relationship between these factors. Materials and Methods: In this study, 120 healthy children aged 6-14 years who applied to Istanbul University Faculty of Dentistry, Department of Pedodontics between October 2019 and April 2020, with 60 mouth breathing and 60 nasal breathing. Individuals who agreed to participate in the study were provided with a complete answer to the questionnaire which consist of 20 questions, divided into 4 factors, and their dmf and DMF values were recorded by performing an intraoral examination. Student's t test, Mann Whitney U test and Shapiro Wilks test were used for analyzes Results: The dmf values of children with mouth breathing were significantly higher than those with nasal breathing (p

Due to the transmission of coronavirus by particle or droplet, diagnosis and treatment of dental problems during the pandemic period in dental settings has been seen as a direct infection risk. This study aimed to compare parents' approach to dental treatment with their educational background during the coronavirus disease-2019 (COVID-19) outbreak in İstanbul. Material and Methods: The parents were invited to answer the questionnaire via electronic form. The questionnaire form consists of 3 parts: (i) the sociodemographic characteristics of the parents (age, gender, educational level and number of children) (ii) parents' behaviors, risk perceptions and knowledge levels during the COVID-19 pandemic (iii) parents' approaches to dental treatment during the pandemic period (risk perceptions, behaviors and attitudes). The data was evaluated through the SPSS 25.0 statistical package program. Chi-square, Fisher's exact, Bonferroni correction and student t-tests were used to evaluate the difference for categorical variables (p<0.05). Results: Response rate was 73.2% (366 parents). The average age of parents is 28.76. Parents with university or higher education level preferred not to go out as a precaution in the pandemic compared to parents with high school or less education level (p=0.044). When their children had toothache complaints during the pandemic period, the situation of taking them to the dentist was statistically significant and higher in parents with a university or higher education level (p=0.003). Conclusion: All these evaluations show that people with a high level of education have behaved more sensitive in terms of both virus protection and dental treatment behaviors during the pandemic period.