Objectives: This study conducted a literature review to systematically confirm the quantitative results of individual studies on oral health-related quality of life (OHRQoL) among elderly adults. Methods: Studies on quality of life related to oral health among Korean elderly adults were selected as targets, and literature published in Korean journals until January 10, 2019, was examined. A total of 179 papers were reviewed using RISS, KISS, eArticle, and DBpia, and 17 papers meeting the final conditions were selected for analysis. Factors were categorized with publication year, sample size, gender, and statistical analysis as main variables. Relevant factors and effect sizes were then encoded, and the values of correlation coefficients and correlation effect sizes were coded. Results: After classifying the factors affecting OHRQoL among elderly adults according to common characteristics, four studies related to food and diet, five studies related to xerostomia, and four studies related to dentures and denture satisfaction were found to be related. Conclusions: Overall, various factors affected OHRQoL among elderly adults. Therefore, oral health among elderly adults must be developed and managed considering the various factors related to OHRQoL.

Objectives: We analyzed the correlation between physique and size of the dental arch of college students with normal occlusion. Methods: Ninety-nine college students filled out the prepared questionnaire. The length and width of the dental arch of the students was measured using a plaster model after taking an impression. The data were analyzed using the t-test and correlational analysis. Results: The maxilla arch length was 3.70 mm longer and the inter-molar width of the maxilla was 3.06 mm longer in men (both p<0.01) than in women. Additionally, the mandible was 3.66 mm longer in men as compared to those in the women (p<0.01). As height increased, there was increase in the body weight (α=0.683, p<0.01), maxilla arch length (α=0.373, p<0.01), molar width of the maxilla (α=0.214, p<0.05), and the mandible (α=0.280, p<0.01). The greater the weight increase, the greater the maxillary arch length increase (α=0.392, p<0.01), and the greater the molar width of the maxilla (α=0.336, p<0.01) and mandible (α=0.502, p<0.01) increase. Conclusions: As physical size (both height and weight) increased, the maxillary length and molar width also increased. Based on the results of this study, the cause of malocclusion, form and size of the dental arch, and stable occlusion can be used as basic data.

Objectives: This study aimed to analyze the association between self-assessed periodontal symptoms and glycated hemoglobin levels in patients with type 2 diabetes. Methods: This cross-sectional study involved 156 patients with type 2 diabetes who were aged 50 years or older. Structured questionnaires were used to investigate the self-assessed periodontal symptoms of the patients. The glycated hemoglobin test was performed to evaluate their long-term blood glycemic control. Chi-square test and logistic multiple regression were performed to analyze the factors associated with glycated hemoglobin levels. Results: Compared with patients aged 65 years and above, more patients aged 64 years and below showed poor glycemic control (p=0.020). Further, compared with patients without self-perceived gingival bleeding and halitosis, more patients with these two conditions showed poor glycemic control (p<0.05). Compared with the group of patients without any periodontal symptoms, the group of patients that had at least one periodontal symptom had a higher proportion of patients with poor glycemic control (p<0.001). In the logistic regression model, gingival bleeding and halitosis were the factors most associated with hyperglycemia (p<0.05). Conclusions: The results of our study suggest that gingival bleeding and halitosis can predict hyperglycemia in patients with type 2 diabetes.

Objectives: This study was to examine the association of sugar-containing snacking habits with dental caries and periodontal diseases. Methods: This study was conducted on 2,807 adults who answered both oral examination and food intake frequency survey in the data of 2015 Korea National Health and Nutrition Examination Survey. The intake frequency of sugary snacks was selected from 17 kind of snacks, which had high sugar content and could affect oral disease. We used the complex sample logistic regression using SPSS 23.0 confirmed the correlation of sugary snack intake frequency and oral diseases. Results: 16.9% of all adults had a sugary snack at least three times a day. 20.7% of dental caries patients and 25.8% of people with periodontal diseases consumed sugary snacks more than three times a day. Especially, periodontal diseases were 1.51 times higher(p=0.008) in three or more consuming snacks group than that who ingested sugary snacks less than six times a week, by correcting the general characteristics and oral health behaviors. Conclusions: Oral health in adults affects oral health in old age, so from a public health perspective, integrated intervention is required to manage the self-cultivation health and to create correct eating habits.

Objectives: The purpose of this study was to investigate the effects of oral health behaviors of patients with hypertension and diabetic patients on the number of remaining teeth in Korean adults over 45 years of age, furthermore, we also aimed to develop oral health care programs and health promotion for patients with hypertension and diabetes. Methods: Altogether, 1,526 subjects with hypertension and diabetes from the 6th Korean National Health and Nutrition Survey (2013-2015) were analyzed. Results: A multiple logistic regression analysis was performed to determine the effects of oral health behavior and periodontal disease on residual teeth in patients with hypertension and diabetes after adjusting for age. We found 1.53 times the risk of having less than 20 remaining teeth in the group of brushing more than 3 times a day (95% CI: 1.00,2.35, p<0.001), 2.27 times (95% CI: 1.23-4.17, p<0.05) in the group not using the dental floss group 0.05), compared to the group undergoing regular dental check-up (95% CI: 0.93-1.85, p>0.05), compared to the non-smoking group 0.77 times (95% CI: 0.51-1.14, p>0.05), 1.33 times (95% CI: 0.98-1.80, p>0.05) in the drinking group compared to the non-drinking group, in the periodontal disease group, the risk of having less than 20 remaining teeth was 2.19 times higher (95% CI: 1.48-3.24, p>0.001) than in the normal group. Conclusions: As a super-aging society, develops in Korea, the prevalence of hypertension and diabetes will increase gradually. Therefore, an oral health policy should be implemented at the national level for the prevention and treatment of periodontal disease as well as the management of oral health the elderly.

Objectives: The purpose of the study was to analyze the association between dyslipidemia and periodontitis in Korean adults aged 30 and older. Methods: We examined 3,992 subjects participating in the 2015 Korean National Health and Nutrition Examination Survey. Periodontal status was evaluated using the community periodontal index (CPI). People with 3 or 4 CPI codes were classified as the periodontitis group. For statistical analyses, chi-square test and logistic multiple regression were used. Results: The prevalence of periodontitis was higher in men, people aged 70 and over, people whose income status was among the lower 25%, and people whose educational level was high school or lower (p<0.001). The prevalence of periodontitis was higher in people who brushed their teeth twice or less, those who did not use interdental cleaning devices, those who did not have a dental checkup in the last 12 months, and those who had not drunk or smoked (p<0.05). The prevalence of periodontitis was increased with individuals whose BMI was ≥25 kg/㎡, those whose glycated hemoglobin was ≥6.5%, and whose lipid levels were higher or lower than the normal range. In the logistic regression model, an increase in triglyceride was found to increase the prevalence of periodontitis (p<0.05). Conclusions: The study suggests that dyslipidemia, especially hypertriglyceridemia, is a predictor of periodontitis.

Objectives: This study provides basic data for developing practical teaching methods enabling efficient execution of the dental hygiene care process. Methods: A total of 197 dental hygiene students experienced in dental hygiene care process in Gwangju and Jeonnam were surveyed from June 1 to August 30, 2019 to study their class flow, professors-student relationships, and class satisfaction level. Post survey, statistical analysis was performed using frequency analysis, independent t-test, Pearson's correlation analysis, and multiple regression analysis. Results: 1. Class fl ow was high in three lecturers (3.56), four hours per week (3.39), and four hours per week (3.94). Class satisfaction was high in three lecturers (3.99) and four hours per week (3.90) (p<0.05). 2. There was a positive correlation between class flow and professor-student relationship (r=0.519), class fl ow and class satisfaction (r=0.566), and professor-student relationship and class satisfaction (r=0.838) (p<0.01). 3. The factors influencing class fl ow were the number of lecturers (β=0.442), class hours per week (β=-0.397), and class satisfaction (β=0.385). Conclusions: Apart from finding ways to improve class satisfaction for class flow in the dental hygiene care process, efforts are required to increase the number of lecturers and class hours per week for efficient class management. Further research is needed to develop practical teaching methods.

Objectives: This study aimed to measure the knowledge of dental hygienists regarding dental waste, and identify the relationship between general characteristics and infection control characteristics. Methods: This study was conducted using a self-reported questionnaire in 250 dental hygienists. The questionnaire consisted of 21 items: storage container (5 items), storage locations (5 items), storage period (9 items), and storage method (3 items). The collected data were analyzed using the t-test and analysis of variance. Results: The education experience of infection management within the last year was reviewed for significant differences among dental hygienists regarding storage container and storage periods (p<0.05). Statistically significant differences were observed regarding the knowledge of storage container, storage locations, storage period, and storage method among the enrolled dental hygienists (p<0.05). Conclusions: This study examined the necessity of developing conservative education and job education programs to improve the knowledge level of dental hygienists regarding dental waste management.

Objectives: The purpose of this study is to improve awareness of male dental hygiene by investigating the dentists' perception of male dental hygienists' image and work performance in clinical practice. Methods: The participants were 102 dentists who agreed to participate in this study. They completed- a self-administered questionnaire survey available on a website. The questionnaire comprised 26 questions, with each item scored on a 5-point Likert scale. Results: The male dentists perceived that with an increase in the experience of male dental hygienists would be willing to pay more than for female dental hygienists. In the case of male dentists, male dental hygienists perceived that they would feel stressed in a women-centered work environment. Additionally, it was found that dentists who had experience working with Male dental hygienists responded more positively to work performance awareness than had no experience (p<0.05). Conclusions: Active employment of male dental hygienists in clinical practice, could positively change dentists' perception of male dental hygienists.

Objectives: This study was conducted to investigate the effects of dental hygienists' job satisfaction on turnover intention and intention to stay. Methods: A survey was conducted targeting 273 dental hygienists in dental clinics. The study data were u analyzed using PASW Statistics 20.0 Results: The level of job satisfaction of dental hygienists was 3.30±0.50, and the highest ranked item in the survey was 'I am satisfied with my relationships with patients' 3.72±0.73. Job satisfaction according to general characteristics showed significant differences in age, marriage, education, career, current work experience, position, and schedule for future turnover. The turnover intention according to general characteristics showed significant difference in age and schedule for future turnover. The intention to stay according to general characteristics showed significant differences in age, marriage, education, career, current work experience, number of dentists, number of dental hygienists, and schedule for future turnover. The factors affecting turnover intention were schedule for future turnover, income, co-worker relation and professional time, while those affecting intention to stay were overall professional satisfaction, co-worker relation, schedule for future turnover, professional time, income, number of dental hygienists, patient relations and current work experience. Conclusions: Job satisfaction factors that had a common effect on turnover intention and intention to stay were schedule for future turnover, income, co-worker relation and professional time. To reduce turnover and encourage longevity, adequate pay and positive interpersonal relationships are necessary.

Objectives: This study applied the co-orientation model to investigate the degree to which dental hygienists and dentists recognize the efficiency of dental hygienists' non-surgical periodontal therapy work; the basic data can be provided as a systematic arrangement that can be applied and extended to dental clinics to raise mutual understanding. Methods: Independent sample t-tests, one-way ANOVA, and paired t-tests were conducted with a total of 888 subjects (530 dental hygienists and 358 dentists) using SPSS Statistics 22.0. Results: The analysis showed that, dental hygienists had higher recognition of the efficiency of their work (p<0.001) than dentists, with respect to all items(p>0.05). With respect to subjective agreement, dental hygienists estimated lower recognition among dentists than other dental hygienists and dentists estimated higher recognition among dentists than dental hygienists. With respect to accuracy, dentists' estimation was lower than the actual recognition among dental hygienists and dental hygienists' estimation was higher than the actual recognition among dentists in all cases except the efficiency of dental hygienists' patient education work and constant learning. Conclusions: There was wide gap between dental hygienists and dentists in recognition of the efficiency of dental hygienists' non-surgical periodontal therapy work. Actions must be taken to raise mutual understanding between dental hygienists and dentists regarding dental hygienists' non-surgical periodontal therapy work, to spread this recognition throughout the dental industry, and to implement systematic support at dental clinics.