The purpose of this study was to evaluate the mitigating effect of the use of interdental brushes on periodontal health inequality. This study was based on the data acquired in the Sixth Korea National Health and Nutrition Examination Survey (KNHANES VI; 2013–2015). A total of 17,583 participants (7,633 males and 9,950 females)) aged 19 years or older completed the KNHANES VI between 2013 and 2015. Multivariable logistic regression analysis was performed using socioeconomic characteristics (sex, age, level of education, individual income), personal health practice (smoking, toothbrushing, dental flossing, interdental brushing, dental clinic visiting), systematic medical factors (diabetes mellitus, hypercholesterolemia, hypertension, obesity) and the community periodontal index. We confirmed differences in the prevalence of periodontal disease with the use of an interdental brushes stratified according to individual income. Three logistic regression models adjusted for covariates hierarchically. In all models, individuals who used an interdental brush were not significantly different from individuals who did not use an interdental brush. The adjusted odds ratio (OR) for interdental brushing was 0.918 with a 95% confidence intervals (CIs) of 0.797–1.057. When periodontal disease was the outcome of the model, the lowest income group had 1.266 (95% CIs 1.066 to 1.502) times the odds of having periodontal disease than the highest income group. In interdental brush nonusers, the lowest income group had 1.276 (95% CI 1.061–1.533) times the odds of having periodontal diseases than the highest income group. However, in the interdental brush users, there were no significant differences in periodontal disease prevalence among income groups. The results suggest that the use of interdental brushes could alleviate periodontal health inequality.

This study developed a problem-based learning (PBL) module to improve integrated thinking and problem-solving ability in students of dental hygiene. After applying PBL, the study tested the improvement in the problem-solving ability and self-efficacy of students. The subjects were 31 fourth-year students of the Department of Dental Hygiene at G University. The PBL process was applied to three topics for 15 weeks, and the tools for evaluating problem-solving ability and self-efficacy were reconstructed and used before and after the application to examine the effects of the module. The result indicates that the mean of problem-solving ability (32 detailed items) increased from 3.37 to 3.65 (an increase of 0.28) after classes (p < 0.001). Alternatively, the average for self-efficacy (22 detailed questions) increased from 0.21 to 2.89 (p < 0.05; an increase of 2.67). The study also confirmed the correlation between problem-solving ability and the total posttest score for self-efficacy (p < 0.001). Thus, the problem-solving ability and self-efficacy of learners were improved in the class to which PBL was applied. These improvements exerted a significant effect on the improvement of problem-solving ability. This finding confirmed the effect of the PBL method on dental hygiene education.

This study assessed the effect of triweekly interdental brushing for a period of 6 months using the bleeding on full-mouth interdental brushing (BOFIB) index. All participants answered questionnaires and were instructed to clean all interdental areas using an interdental brush at least every second day. A dentist assessed the BOFIB index of 28 participants at baseline and at 3- and 6-month follow-up visits. We stratified the participants into three groups: IB-NN, those who used the interdental brush less than three times per week both before and after this program; IB-NY, those who used the interdental brush less than three times per week before the program but at least three times per week after the program; and IB-YY, those who used it at least three times per week both before and after the program. Owing to the weekly number of interdental brushings, the IB-YY and the other two groups showed a significant difference at baseline. At the 6-month follow-up, the weekly number of interdental brushings led to a significant difference between the IB-NN and the other two groups. The BOFIB index was lower among the compliant participants than among the noncompliant participants after 3 and 6 months of triweekly interdental brushing.

We conducted a multilevel analysis to identify the individual- and school-level factors that affect Korean high school students’ tooth brushing, soda intake, smoking, and high-intensity physical activity. We sampled 27,919 high school students from the 15th Korea Youth Risk Behavior Web-Based Survey. The individual-level variables included demographic, socioeconomic, and health-related factors. The school-level variables included school system and school type. Regarding the individual-level factors, economic level and academic performance had a significant effect on health behavior when the demographic variables were adjusted. In the final model, the school-level factors had a significant effect on health behavior. The odds ratio (OR) of brushing less than twice a day in vocational schools compared to general schools was 1.63 (p < 0.001), and the OR of soda intake more than three times a week in vocational schools was 1.33 (p < 0.001). In addition, the OR of smoking in vocational schools was 2.89 (p < 0.001), and the OR of high-intensity physical activity in vocational schools was 0.80 (p < 0.001). Therefore, both individual- and school-level factors affect Korean students’ health behaviors. A school-based comprehensive health promotion strategy should be developed that considers schools’ characteristics to equip all students with health awareness, regardless of socioeconomic status.

Soo-Myoung Bae, Hye-Rim Jeon, Gyoung-Nam Kim, Seon-Hui Kwak, and Hyo-Jin Lee. J Dent Hyg Sci 2024;24:62-70. https://doi.org/10.17135/jdhs.2024.24.1.62

Lee HJ, et al. J Periodontal Implant Sci. 2019 Aug;49(4):206-214. https://doi.org/10.5051/jpis.2019.49.4.206