Background and Objectives:In recent decades, many studies have been carried out on the importance of Kolb experiential learning theory (ELT) in teaching-learning processes and its effect on learning outcomes. However, some experts have criticized the Kolb theory and argue that there are some ambiguities on the validity of the theory as an important predictor of achievement. This study has been carried out on dental students’ educational achievement in relation to their dominant learning styles based on Kolb theory in Mashhad University of Medical Sciences (Iran).Methods:In a cross sectional study, Kolb Learning Style Inventory (LSI Ver. 3.1) as well as a questionnaire containing students’ demographic data, academic achievement marks including grade point average (GPA), theoretical and practical courses marks, and the comprehensive basic sciences exam (CBSE) scores were administered on a purposive sample of 162 dental students who had passed their comprehensive basic sciences exam. Educational achievement data were analyzed in relation to students’ dominant learning styles, using descriptive and analytical statistics including χ2, Kruskal-Wallis and two-way ANOVA tests.Results:The dominant learning styles of students were Assimilating (53.1%), Converging (24.1%), Diverging (14.2%) and Accommodating (8.6%). Although, the students with Assimilating and Converging learning styles had a better performance on their educational achievement, there was no significant relationship between educational achievement and dominant learning style (P≥0.05).Conclusion:Findings support that the dominant learning style is not exclusively an essential factor to predict educational achievement. Rather, it shows learning preferences of students that may be considered in designing learning opportunities by the teachers.

Background: Smoking among adolescents is a universal matter. Several findings suggest that smoking can lead to impaired oral health. Objectives: The current study was undertaken to evaluate the normative and subjective oral health status of 13-year-old smokers and nonsmokers in Qazvin, Iran. Methods: This cross-sectional study was carried out on a multistage cluster sample of 519 adolescents in Qazvin, Iran, in 2015. A self-administered questionnaire comprising three parts pertaining to oral health behavior (frequency of tooth brushing and dental visits, snacking, and the use of fluoride toothpaste) was administered. The socio-demographic and subjective characteristics of the study participants, including self-reported smoking, gum bleeding, and halitosis, were determined. The simplified oral hygiene index (OHI-S) was used to evaluate their clinical condition. Binary logistic regression analysis was performed separately for the smokers and nonsmokers. Correlation, kappa agreement, sensitivity, and specificity between the subjective and normative measurements were calculated. Results: 26% of the male adolescents and 15% of the female adolescents claimed that they smoked cigarettes or used water pipe. Infrequent dental visits (≥ 2 years) [odds ratio (OR) = 3.0, 95% confidence interval (CI): 1.1-7.8, P = 0.030), frequent snacking (≥ 3 times between meals) (OR = 3.5, 95% CI: 1.5 -8.4, P = 0.001), and halitosis were significantly associated with poor self-perceived oral health. Poor oral hygiene index, which represents normative measurement, was similar among smokers and nonsmokers in this age group. Sensitivity and specificity were reported to be 81% and 85% for smokers and 30% and 21% for nonsmokers, respectively. Conclusions: Normative and subjective oral health evaluations were not in the same line among smoking and nonsmoking adolescents. Professional screening is necessary to evaluate oral health in this age group, especially in countries with developing oral health care systems.