JKAOH Journal of Korean Academy of Oral Health

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

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  • Original Article 2022-06-30

    Reduction in malodor, gingival index and plaque index after 4-week use of new concept oral irrigator

    Hee-Ju Kim , Jong-Bin Kim

    Abstract : Objectives: This study aimed to evaluate the changes in clinical indexes related to periodontitis, such as malodor, gingival and plaque indexes, during the adjuvant use of a high pressure oral irrigator (COMORAL®, SMDsolutions, Seoul, Korea) in volunteers.Methods: We recruited 17 volunteers from an advertisement posted on Dankook University’s bulletin board. The oral malodor, gingival index, and plaque index of each volunteer were during the adjuvant use of a high pressure oral irrigator within a 4-week period.Results: Routine tooth brushing was done together with the adjuvant use of a new high pressure oral irrigator in the 4-week period. The oral malodor, gingival index, and plaque index measured after 2 and 4 weeks of use significantly decreased (P

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  • Original Article 2022-06-30

    Socioeconomic factors related to tooth brushing behavior among adults in Korea: analysis with 2019 Community Health Survey data

    Yu-Rim Lee , Nam-Hee Kim

    Abstract : Objectives: This study aimed to identify the socioeconomic factors related to tooth brushing behavior among adults in Korea.Methods: This cross-sectional study used data from the Korea Community Health Survey (KCHS) in 2019. Respondents aged 19 years and older (n=299,099) comprised the study sample. The dependent variable was tooth brushing behavior, whereas the independent variables were demographic and socioeconomic factors. The data were processed using chi-squared test, independent t-test, ANOVA, and adjusted multiple logistic regression analysis were performed. Statistical analysis was performed using the STATA 17.0 program, with significance set at the 5% level.Results: About half (55%) of the respondents brushed their teeth at least twice a day. The findings also revealed significant differences according to socioeconomic status (P

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  • Original Article 2022-06-30

    Effect of the level of digital literacy of dental hygienists on occupational self-efficacy and organizational commitment

    Ji-eun Yang , Jaeman Woo , Sung-Joon Kim

    Abstract : Objectives: This study aims to assess dental hygienists’ level of digital literacy and its effect on occupational self-efficacy and organizational commitment.Methods: The online survey results, obtained from 307 respondents, were statistically analyzed using frequency analysis, t-test, one-way ANOVA, and multiple regression analysis with the IBM SPSS 20.0 software.Results: The factors affecting the technology portion of digital literacy included age (P

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  • Original Article 2022-09-30

    The frequency of tooth extraction before and after coverage of dental implants by National Health Insurance

    Jin-Sun Choi , Deok-Young Park

    Abstract : Objectives: This study aims to determine whether National Health Insurance dental implant coverage increased instances of tooth extraction in older adults.Methods: Three periods were identified to analyze dental implant uptake in older adults-pre-coverage, intermediate-coverage, and post-coverage. Data for analysis were obtained from two sources. Frequency of tooth extraction and dental treatment data were obtained from the Healthcare Bigdata Hub. Data on the dental health status of older adults were obtained from National Health and Nutrition Examination Survey.Results: In 2019, the National Health Insurance supplied 10.2 dental implants per 100 older adults in Korea. The frequency of tooth extractions increased slightly after dental implant coverage for older adults, but statistically, the number of missing teeth was significantly reduced. Dental caries indices in older adults were also exacerbated during this period. The DMF rate and DMFT index for older adults increased significantly. However, the illness rate due to dental caries was also reduced. There was no significant difference in the prevalence of periodontal diseases. Based on the National health data and the frequency of related services, the slight increase in tooth extractions may be due to increased utilization of dental services.Conclusions: The authors could not find clear evidence that dental implant coverage increased the frequency of tooth extraction in older adults.

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  • Original Article 2022-06-30

    A study on trends of dental caries disparities according to household income level of children and adolescents using data from the Korea National Health and Nutrition Examination Survey

    Se-Hwan Jung

    Abstract : Objectives: The purpose of this study is to investigate the trend of dental caries inequalities according to the household income level of children and adolescents, using data from Wave 4 (2007-2009) to Wave 7 (2016-2018) of the Korea National Health and Nutrition Examination Survey (KNHANES).Methods: The raw data were obtained from the website of KNHANES. The data by year within each wave were integrated and used for the analysis. In accordance with the guidebook for data users, the experience rate and prevalence rate of dental caries in primary and permanent teeth were estimated. Additionally, the absolute difference (AD) between the lowest and highest household income levels and the prevalence ratio (PR) by household income level were calculated.Results: The AD in the experience rate of dental caries showed a tendency to marginally decrease in primary teeth and moderately increase in permanent teeth. The PR was not statistically significant (P>0.05) in all waves. The AD in the prevalence rate of dental caries decreased by 5.4% and 8.2% in primary and permanent teeth, respectively. The PR in Wave 7 showed that all statistical significance disappeared (P>0.05).Conclusions: In Korean children and adolescents, dental caries inequalities by household income level showed a tendency to gradually decrease in primary or permanent teeth, and statistical significance was no longer confirmed.

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  • Original Article 2022-06-30

    The analysis of dental treatments among the disabled in a charity dental clinic, Cheongju city

    Jae-In Ryu , Hye-Ri Jeong

    Abstract : Objectives: Disabled people experience difficulties in accessing dental services. Some of them tend to rely on charity dental services due to financial reasons. The purpose of this study is to identify some of the treatment statuses of disabled people to aid in planning oral health policies.Methods: This study analyzed the dental records of 141 patients from 2014 to 2019 in a charity dental clinic in Cheongju City. The demographic characteristics such as gender, age, area, social security, and type of disability of the patients were analyzed. Chi-square test and logistic regression analyses were performed to investigate the sociodemographic factors related to dental treatments.Results: Within the study population, 63.1% were men and 66.0% were older, over 40 years old. The type of disabilities showed significant differences in the possibilities of having periodontal treatments. The older people showed almost four times a higher risk of experiencing dental extractions than those who were younger, even after adjustments with sociodemographic factors.Conclusions: Among disabled people, an older age corresponds to a much higher probability of extraction, making chewing difficult and leading to the deterioration of general health. It is therefore necessary to conduct a detailed and extended national oral health survey on people with disabilities to allow for the provision of systematic support.

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  • Original Article 2022-09-30

    Barriers to the utilization of dental services among international students of Korean universities

    Nzeyimana Clemence , Youn-Hee Choi , Keun-Bae Song

    Abstract : Objectives: International students attending Korean universities are sometimes not able to receive timely dental treatment, despite the need for dental treatment owing to various oral health problems. The purpose of the study was to identify various barriers to the regular use of dental services by international students in a metropolitan area of Korea.Methods: Questionnaires, both online and offline, were sent to 500 foreign university students enrolled in five selected universities located in Daegu city and nearby areas, with a total of 19 valid responses received. The questionnaire consisted of 41 items, including demographic characteristics, oral hygiene-related behavior, barriers to dental services access, and Oral Health Impact Profile (OHIP-14). The internal validity of each factor was 0.8 or higher (Cronbach Alpha α=0.86), confirming the reliability. All data were analyzed using IBM SPSS for Windows ver. 25.0 was used for analysis, and the statistical significance level was set to 0.05%.Results: Among the international student participants, 69.5% did not visit the dentist during their stay in Korea, and those with low prevalence of gum bleeding and plaque were more likely to visit the dentist regularly. Financial problems and lack of knowledge and interest in oral health were significantly associated with the use of dental services. The revised model’s explanatory power was 20.3%.Conclusions: In order to improve the oral and general health of international students residing in Korea, university level oral health education programs, oral health care centers, and governmental support programs should be implemented.

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  • Original Article 2022-12-31

    Antimicrobial activity of candidate probiotic Streptococcus salivarius against Gram-positive bacteria in oral cavity

    Sung-Hoon Lee , Dong-Heon Baek

    Abstract : Objectives: The aim of this study is to investigate antimicrobial activity in isolated Streptococcus salivarius against Gram-positive bacteria related oral diseases.Methods: S. salivarius was used in G2, G7, K12, and ATCC 7073 strains and tryptic soy broth supplemented with glucose was cultivated. Actinomyces israelii, Actinomyces viscosus, and Enterococcus faecalis were cultivated with brain heart infusion broth. Streptococcus mutans and Streptococcus sobrinus were maintained using tryptic soy broth. The antimicrobial activity of S. salivarius was performed by minimum inhibitory concentration using the spent culture medium.Results: All S. salivarius have antimicrobial activity against Gram-positive bacteria in oral cavity. When comparing antimicrobial activity, S. salivarius G2 and G7 as isolated strain showed stronger antimicrobial activity against Gram-positive microbe than type K12 strain.Conclusions: S. salivarius G2 and G7 have strong antimicrobial activity and may be prevent oral disease by Gram-positive bacteria in oral cavity.

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  • Original Article 2022-06-30

    Analysis of inequality trends in dental caries, deep periodontal pockets, and severe tooth loss according to income level of adults using data from the Korea National Health and Nutrition Examination Survey

    Se-Hwan Jung

    Abstract : Objectives: The purpose of this study is to analyze the trend of inequality in dental caries, deep periodontal pockets, and severe tooth loss according to the income level of adults using data from the Korea National Health and Nutrition Examination Survey (KNHANES).Methods: The raw data from the 4th wave (2007-2009) to the 7th wave (2016-2018) were downloaded from the KNHANES website. The analytical subjects were 19 years of age or older who completed oral examinations and were classified differently according to the prevalence characteristics of each clinical indicator. The prevalence of permanent tooth caries (19 years +), deep periodontal pockets (30 years +), total tooth loss (50 years +), and 20 teeth and over (70 years +) were estimated according to the guidebook for data users. The absolute difference (AD) between the lowest and highest income levels and the prevalence ratio (PR) were calculated. All statistical analyses were performed with STATA version 13.Results: The prevalence of permanent tooth caries decreased by 6.7%, but the AD increased by 3.4% and the PR was statistically significant. The prevalence of deep periodontal pockets was 6-10%, but the AD increased by 1.7%, and the PR of 7th wave rapidly increased. The prevalence of total tooth loss decreased by 1.5%, but in the 7th wave, the AD and the PR rapidly increased. The prevalence of 20 teeth and over increased by 10.9%, but the AD increased by ―4.3%, and the PR was statistically significant in the first and second quantiles of all waves.Conclusions: In Korean adults, overall oral health status has improved over the past decade, but oral health inequality according to income level has generally worsened. Therefore, policy development including intervention in social determinants is needed to reduce the oral health inequality identified in this study.

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  • Original Article 2022-09-30

    Analysis of inequality trends in self-rated oral health and oral health-related quality of life of adults according to household income level using data from the Korea National Health and Nutrition Examination Survey

    Se-Hwan Jung

    Abstract : Objectives: The purpose of this study was to analyze the inequality trends in self-rated poor oral health, chewing discomfort, and speaking discomfort of adults according to the household income level using data from the Korea National Health and Nutrition Examination Survey (KNHANES).Methods: Data from 2007-2020 were downloaded from the KNHANES website and were integrated by year within each wave. The participants were 19 years old or over who responded to the oral health items of the questionnaire survey. Prevalence of self-rated poor oral health, chewing discomfort, and speaking discomfort were estimated according to the guidebook for data users. The age standardized rates were computed using the 2005 standard population. Absolute difference (AD) between the lowest and highest household income levels and the prevalence ratio (PR) as relative ratio were calculated.Results: The prevalence of self-rated poor oral health decreased by 14.0%, but the AD increased by 3.0%, and the PR was enlarged in the lower household income level group. The prevalence of chewing discomfort and speaking discomfort decreased by 12.5% and 4.8%, respectively, but the AD of the two indicators persisted, and the PR was enlarged in the lower household income level group.Conclusions: Self-rated oral health and oral health-related quality of life have improved overall over the past decade in Korean adults, but the severity remains, and the problem of equity has persisted or aggravated. Therefore, it is necessary to find an upstream approach to resolve the inequality in oral health in Korea.

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March 2024
Vol.48 No.1

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