JKAOH Journal of Korean Academy of Oral Health

ISSN(Print) 1225-388X ISSN(Online) 2093-7784

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  • Original Article 2019-09-30

    Effects of Diospyros kaki peel, Momordica charantia, and Canavalia gladiata extracts on the cariogenic traits of Streptococcus mutans

    Dong-Woon Kim, Dong-Ik Lee, Sang-Uk Im, Youn-Hee Choi, Keun-Bae Song

    Abstract : Objectives: The purpose of this study is to determine methods of dental caries prevention by investigating the use of compounds of Diospyros kaki (D. kaki) peel, Momordica charantia (M. charantia), and Canavalia gladiata (C. gladiata) extracts to limit the cariogenic traits of Streptococcus mutans (S. mutans), such as their ability to proliferate and adhere to the tooth surface. Methods: Broth microdilution and the agar spreading assay were used to determine the antimicrobial effect and minimum inhibitory concentration (MIC) of S. mutans extracts. In order to identify the adhesive ability of S. mutans at varying concentrations, culture plates were first stained with 1 ml of 0.01% crystal violet for 15 minutes at room temperature, and then eluted with 1 ml of EtOH:Acetone (8:2) solution for 15 minutes in a 37°C incubator. Eluted solutions were then evaluated by use of a spectrophotometer at 575 nm. Results: Experiments were conducted in order to investigate the effectiveness of D. kaki peel, M. charantia, and C. gladiata extracts on limiting the proliferation of S. mutans. The MIC was measured as an indication of whether the antibacterial activity of D. kaki peel, M. charantia, and C. gladiata extracts had a significant bacteriostatic effect on S. mutans. M. charantia extract was effective for growth inhibition on S. mutans at a minimum concentration of 0.25%. From the adhesion ability assay, M. charantia extract had an anti-adhesive effect. Conclusions: These results indicate that M. charantia extract demonstrates antibacterial activity and has an anti-adhesive effect on S. mutans. Due to these properties, M. charantia extract may be used to prevent dental caries.

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  • Original Article 2019-06-30

    Menopause experience and the relationship between metabolic syndrome components and periodontitis

    Ye Hwang Kim, Jung Hwa Lee

    Abstract : Objectives: The purpose of this study was to investigate the correlation of periodontitis with metabolic syndromes and menopause status.Methods: The 2013 Korea National Health and Nutrition Examination Survey data of 645 postmenopausal and 663 premenopausal women were analyzed using the Pearson’s chi-squared test and multiple regression analysis with the Statistical Package for the Social Sciences (PASW statistics) software version 21.0. Metabolic syndromes and community periodontal index (CPI) were analyzed. Results: CPI 3, CPI 4 (P

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  • Original Article 2019-06-30

    Change over a period of 9 years in self-reported oral health of a middle-aged population using 4-6th KNHANES data

    Song-Yi Kim, Nam-Hee Kim

    Abstract : Objectives: To explore changes in self-reported oral health in middle-aged Koreans over a period of 9 years.Methods: This study design was a cross-sectional analysis. This study analyzed the data of 18,845 middle-aged (45-64 years) subjects who participated in 4-6th Korea National Health and Nutrition Examination Surveys (KNHANES). A complex-sample chi-square test was used to analyze self-reported poor oral health according to sex, household income, and education. A complex-sample logistic regression analysis was used to identify the changes in the factors. SPSS 23.0 and the R ver. 3.5.1 statistical package were used for the analyses.Results: Poor oral health have been decreased by 5.3% over the 9-year period. Middle-aged men were more likely to report their oral health as worse than women. The lower income and education groups reported their oral health as poor compared to the higher income and education groups. The factors affecting self-reported poor oral health over the 9-year period were sex, income, and education.Conclusions: More than half of the aged population reported their oral health as poor. Oral health policies should be established for the aged population, including the middle-aged population, for long-term plans.

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  • Original Article 2019-06-30

    A study on the Korean dental education system

    Bo Young Park, Won-il Bhang, Jihyun Lee, Jung Joon Ihm, Ho Beom Kwon

    Abstract : Objectives: This study aimed to propose criteria for evaluating the validity of dental education systems in Korea and suggest future directions for their improvement.Methods: We looked into dental educational institutions and derived criteria for analysis and comparison of dental education systems in Korea. Using analytical methods, we compared the strengths and weaknesses of each education system, and suggested core areas of improvement.Results: Considering the demands placed on the Korean dental education sector, it is desirable to have an integrated education system that includes the preliminary and main courses, comprehensive training linking the basic medicine and clinical practice, and complete career guidance.Conclusions: A good dental education system is one that meets the educational goals set by a dental school. If the goal is to train a student to be a good dental practitioner, a 2+4 or 4+4 system is recommended, while a 3+4 model is more suitable when the objective is to train students to be researchers.

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  • Original Article 2019-12-30

    A survey of the understanding of the scope of work undertaken by dental hygienists and chair-side dental assistants among dental students in Seoul

    Kyung-Jun Kim, Gyorin Lee, Bo-Hyoung Jin

    Abstract : Objectives: This study was conducted to investigate the awareness of the students currently attending dental colleges/schools in Seoul regarding the scope of work done by a dental hygienist (DH) and a chair-side dental assistant (DA). Methods: A direct questionnaire survey was conducted among 950 students who currently attend dental colleges/schools in Seoul. We were able to use a total of 458 samples for final analysis after excluding inappropriate ones. The contents of this structuralized survey included the obligation of proper name badge use for dental health care personnel, the legal work scopes of a DH and a DA in accordance with the revised execution of the ‘Legal Acts on Medical Technicians’, and the inclusion/exclusion of such contents from dental colleges/schools curricula. The results were statistically analyzed via the IBM SPSS Statistics 25.0 software. Results: Many subjects were aware of the difference in scope of work performed by a DH and a DA (P

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  • Original Article 2019-09-30

    Changes in the composition of artificial cariogenic biofilms over time

    Chul Oh, Santosh Pandit, Jae-Gyu Jeon

    Abstract : Objectives: The purpose of this study was to investigate changes in the composition of artificial cariogenic biofilms using a Streptococcus mutans biofilm model over a period of time. Methods: We analyzed the dry weight, colony forming unit (CFU) number, extracellular polysaccharide (EPS) biovolume, and acid production rate of S. mutans biofilms formed on saliva-coated hydroxyapatite discs after 26 h, 50 h, 74 h, 98 h, 171 h, and 195 h. In addition, we performed a laser scanning confocal fluorescence microscopy to determine the bacterial volume, EPS biovolume, and biofilm thickness. We calculated the biofilm density using dry weight and EPS biovolume. Results: Over a period of time, there was no change in the CFU number and acid production rate of S. mutans biofilms, but there was an increase in the dry weight and EPS biovolume of S. mutans biofilms. The bacterial volume, EPS biovolume, and biofilm thickness only increased in the 50-h-old biofilm; however, no change was observed in 50-195-h-old biofilms. In addition, an increase in the biofilm density was observed over time. Conclusions: These results suggest that the acid production ability of cariogenic biofilms does not change, but the biofilm density increases over time. However, due to scientific information, further research needs to be conducted in the field of dentistry to get further insights on the progression of cariogenic biofilms over time.

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  • Original Article 2019-09-30

    Correlation between oral health behaviors and problematic experiences associated with smartphone use in adolescents

    Eun-Jung Namkoong, Deuk-Sang Ma

    Abstract : Objectives: We investigated the correlation between oral health behaviors and problematic experiences associated with smartphone use in adolescents. Methods: Raw data from the 13th National Health and Nutrition Examination Survey (KNHANES) were used. The data were analyzed using a composite sample-planning file. Statistical analysis was performed using PASW Statistics 21.0 (SPSS Inc., Chicago, IL, USA). Statistical significance was set at P

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  • Original Article 2019-12-30

    In vitro fluoride release from five different fluoride varnishes

    Ji-Soo Kim, Min-Ji Byon, Yong-Tae Nam, Jin-Bom Kim, Seung-Hwa Jeong

    Abstract : Objectives: This study aims to compare the fluoride-release between different fluorine varnish under in vitro experimental conditions. Methods: In this study, 5 fluoride varnish products distributed in Korea were selected. V-varnish™ (Vericom, Korea: VV), CavityShield™ (3M ESPE, USA: CS), Clinpro™ White varnish™ (3M ESPE, USA: CP), MI Varnish™ (GC, Japan: MI), and Fluor Protector (Ivoclar Vivadent, Liechtenstein: FP). For the in vitro study, 10 mg of each fluoride varnish was thinly applied to the same area of the specimen. The specimen was then immersed in 3 ml of distilled water at consistent intervals to confirm fluoride release. Nine specimens per group were used. Fluoride ion electrodes were used to measure the fluoride concentration of the solution. The Kruskal-Wallis nonparametric test was performed to compare between each experimental group, and the Wilcoxon signed-rank nonparametric test was performed to compare experimental groups over time. The significance level for a Type I error was set at 0.05. All statistical analyses were performed using SPSS 25.0 (IBM Co., Armonk, NY, USA). Results: In vitro experiments showed that the amount of fluoride released from MI was higher than the other groups during the first 12 hours after application. However, the amount of fluoride released from CP and CS was higher than MI as the immersion time increased over 12 and 20 hours, respectively. The fluoride release from FP was the lowest at all measurement points. Conclusions: The results of this study showed that the remaining fluoride effect from rosin type fluoride varnishes was higher than liquid type fluoride varnishes. There were differences in the residual fluoride concentrations despite each fluoride varnish having the same fluoride content.

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  • Editorial 2020-03-30

  • Original Article 2021-03-30

    A study on the influencing factors of oral health-related behaviors of the elderly in elderly welfare facilities on oral health-related quality of life

    Byung Ik Yang , Ji-A Park , Jae-Young Lee , Bo-Hyoung Jin

    Abstract : Objectives: In order to understand the factors that influence the oral health-related quality of life of older adults, we investigated the quality of life, oral health status, and oral health behavior of older adults in a metropolitan city in Korea. Methods: Data were collected from October 2019 to March 2020, after approval was obtained from the authors’ institutional review board. Oral examinations were administered and a structured questionnaire was distributed to 150 older adults at a public nursing home. Data on sociodemographic factors, oral health behaviors, general health questions, and oral health-related quality of life (assessed with the Oral Health Impact Profile-14 [OHIP-14]) were collected with the questionnaire. To assess the general health condition of the participants, grip strength and upper arm and calf circumference were measured. Multiple logistic regression analysis was used to determine the correlation between oral health-related quality of life and other variables. Results: Whether brushing was performed, the number of remaining teeth, and the presence of periodontal disease were found to correlate with OHIP-14 scores (P<0.05). Oral Health Impact Profile-14 scores and sociodemographic factors in older adults through multiple logistic regression analyses with general health, oral health habits and conditions, and need for assistance with daily oral health care. Correlations between OHIP-14 scores and general health variables, such as thigh circumference and grip strength, revealed a low oral health-related quality of life in participants who needed help during brushing (P<0.05). Conclusions: Results of the study confirmed a relationship between OHIP-14 scores and oral health and habits among older adults in public nursing homes with socioeconomic status, and general health, and oral health, and each variable affects the relationship. Further analysis and additional epidemiological studies are needed to understand the interrelationships.

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March, 2021
Vol.45 No.1

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JKAOH Journal of Korean Academy of Oral Health
ISSN(Print) 1225-388X ISSN(Online) 2093-7784