JKAOH Journal of Korean Academy of Oral Health

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

Editorial 30 March 2024

For academic continuity: nurturing younger students and nurturing talent!

Kee-Wan Chang J Korean Acad Oral Health 2024; 48: 1-2

Original Article 30 March 2024

The regional distribution and sociodemographic characteristics of adults with Significant Tooth Loss

Jong-Im Choi, Heung-Soo Lee, Hyun-Jeong Ju et al. J Korean Acad Oral Health 2024; 48: 15-19
Objectives: The purpose of this study was to assess the applicability of the Significant Tooth Loss index as a new statistical indicator and to analyze the socio-economic factors of the participants included in the Significant Tooth Loss. Methods: This study used raw data from the Korea National Health and Nutrition Examination Survey (2016-2018). The survey included 13,199 adults aged ≥19 years. The Significant Tooth Loss was defined as a group with more than a third quartile (top 1/4) of th...
Key Words: Adults, Indices, Significant Tooth Loss index, Tooth loss

Original Article 30 March 2024

Microplastic chip occurrence at toothbrush bristle tips: an optical microscopy investigation

Seung-Hwa Jeong, You-Jin Cho, Eun-Joo Jun J Korean Acad Oral Health 2024; 48: 20-25
Objectives: This study aimed to investigate the presence of microplastic chips at the tips of toothbrush bristles using optical microscopy. Methods: Toothbrushes available in South Korea were tested. We randomly selected 12 toothbrushes, including four domestically produced and eight imported toothbrushes. Toothbrushes with tapered bristle ends were excluded. Toothbrushes with conventional bristle shapes based on visual inspection were included. Three identical toothbrushes were prepared. The ou...
Key Words: Microplastic chip, Optical microscopy, Toothbrush bristle

Original Article 30 March 2024

Comparison of oral health problems and behavior between daytime and shift workers

Min-ji Oh, Heung-Soo Lee J Korean Acad Oral Health 2024; 48: 26-30
Objectives: This study aimed to not only compare the oral health problems and behavior of daytime and shift workers but also investigate the effects of work type on oral health behavior to help improve occupational oral health policies and systems. Methods: Workers from three different workplaces in Jeollabuk-do were selected through convenience sampling. After posting a study recruitment notice, an online self-administered questionnaire (Naver form, Naver corp., Korea) was used to collect data....
Key Words: Health behavior, Occupation, Oral health, Shift work, Workers

Original Article 30 March 2024

Effects of waterline flushing and related factors in dental units on bacterial counts in dental water

Geun-yeong Kim, Eun Young Park, Joon Sakong et al. J Korean Acad Oral Health 2024; 48: 3-8
Objectives: Water discharged from waterlines in dental units can cause cross-infection among dental workers and patients by various mechanisms. Therefore, we analyzed the bacterial counts in the water of dental unit chair waterlines, according to waterline flushing and related factors. Methods: A total of 58 dental hospitals located in a metropolitan city participated in this study between September 2019 and January 2020. Water was collected from a high-speed handpiece and a three-way syringe of...
Key Words: Bacteria, Dental hygienists, Dental unit waterlines, Flushing

Original Article 30 March 2024

Research on financial estimates to ensure dental care for North Korean residents after unification

Dong-Hun Han, Seung-Pyo Lee, Hoon Myoung et al. J Korean Acad Oral Health 2024; 48: 9-14
Objectives: The purpose of this study was to estimate the financial cost required for dental health care coverage by integrating North Korea’s free medical care system and South Korea’s health insurance system, assuming the unification of North and South Korea. Methods: North Korea’s health insurance and medical benefit finances were estimated based on the benefit content, benefit target, benefit level, dental service utilization rate, and dental care cost growth rate. Results:...
Key Words: Dental care guarantee, Financial estimation, Reunification

March 30, 2024Current Issue Vol. 48 No. 1

    March, 2024 | Volume 48, No. 1
  • Editorial 2024-03-30

  • Original Article 2024-03-30

    Effects of waterline flushing and related factors in dental units on bacterial counts in dental water

    Geun-yeong Kim , Eun Young Park , Joon Sakong et al.

    Abstract : Objectives: Water discharged from waterlines in dental units can cause cross-infection among dental workers and patients by various mechanisms. Therefore, we analyzed the bacterial counts in the water of dental unit chair waterlines, according to waterline flushing and related factors. Methods: A total of 58 dental hospitals located in a metropolitan city participated in this study between September 2019 and January 2020. Water was collected from a high-speed handpiece and a three-way syringe of a dental unit chair and transported to the experimental lab within 4 hours; bacterial plating colony counting was performed after culturing for 72 hours. In addition, a survey was conducted with questions on the characteristics of hospitals, waterline flushing, and related factors, such as water purification systems, regular filter replacement, and backflow prevention equipment. Results: The bacterial count in the water of the dental handpiece and three-way syringe in the institutions that performed waterline flushing was lower than that in the institutions that did not (P

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  • Original Article 2024-03-30

    Research on financial estimates to ensure dental care for North Korean residents after unification

    Dong-Hun Han , Seung-Pyo Lee , Hoon Myoung et al.

    Abstract : Objectives: The purpose of this study was to estimate the financial cost required for dental health care coverage by integrating North Korea’s free medical care system and South Korea’s health insurance system, assuming the unification of North and South Korea. Methods: North Korea’s health insurance and medical benefit finances were estimated based on the benefit content, benefit target, benefit level, dental service utilization rate, and dental care cost growth rate. Results: The results of the financial estimate assuming an average annual growth rate of dental medical expenses of 5% were as follows. Assuming that the proportion of health insurance recipients was 0% and the proportion of medical benefit recipients was 100%, health insurance was estimated at 0 won and government spending on medical benefits was estimated at KRW 771.9 billion in 2022. Assuming that the proportion of health insurance beneficiaries was 97% and the proportion of medical benefit recipients was 3%, health insurance was estimated at KRW 8,241.3 billion and government expenditure on medical benefits was estimated at KRW 510.9 billion in 2052. In addition, the financial estimation results assuming an average annual growth rate of dental medical expenses of 10% were as follows. Assuming that the proportion of health insurance recipients was 0% and the proportion of medical benefit recipients was 100%, health insurance was estimated at 0 won and government spending on medical benefits was estimated at KRW 808.7 billion in 2022. Assuming that the rate of health insurance beneficiaries was 97% and the rate of medical benefit recipients was 3%, health insurance was estimated at KRW 34.858 trillion and government spending on medical benefits was estimated at KRW 2.1608 trillion in 2052. Conclusions: If the rate of increase in dental medical expenditure is not controlled, it is possible that very high dental medical expenditure will become a significant social burden for both North and South Korea. A strategy needs to be developed to minimize the financial impact after unification and promote efficient integration of the dental healthcare system.

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  • Original Article 2024-03-30

    The regional distribution and sociodemographic characteristics of adults with Significant Tooth Loss

    Jong-Im Choi , Heung-Soo Lee , Hyun-Jeong Ju et al.

    Abstract : Objectives: The purpose of this study was to assess the applicability of the Significant Tooth Loss index as a new statistical indicator and to analyze the socio-economic factors of the participants included in the Significant Tooth Loss. Methods: This study used raw data from the Korea National Health and Nutrition Examination Survey (2016-2018). The survey included 13,199 adults aged ≥19 years. The Significant Tooth Loss was defined as a group with more than a third quartile (top 1/4) of the total number of tooth loss. The Significant Tooth Loss index was defined as the mean tooth loss in the group. Chi-square test and logistic regression analysis were used to analyze the socio-economic factors of the Significant Tooth Loss, and absolute and relative differences were calculated to confirm oral health inequality. Results: Among overall tooth loss in adults, the proportion of tooth loss in the Significant Tooth Loss was 83.8%. The Significant Tooth Loss index was a useful indicator to determine oral health statistics. Socio-economic factors that were associated with significant tooth loss were age, gender, region, household income, and education. Oral health inequality was observed based on household income and education. Conclusions: The Significant Tooth Loss index should be used to measure the level of oral health. Measures to reduce tooth loss should be investigated.

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  • Original Article 2024-03-30

    Microplastic chip occurrence at toothbrush bristle tips: an optical microscopy investigation

    Seung-Hwa Jeong , You-Jin Cho , Eun-Joo Jun

    Abstract : Objectives: This study aimed to investigate the presence of microplastic chips at the tips of toothbrush bristles using optical microscopy. Methods: Toothbrushes available in South Korea were tested. We randomly selected 12 toothbrushes, including four domestically produced and eight imported toothbrushes. Toothbrushes with tapered bristle ends were excluded. Toothbrushes with conventional bristle shapes based on visual inspection were included. Three identical toothbrushes were prepared. The outer bristles of each toothbrush were sampled using ScotchTM tape and prepared using a scalpel for optical microscopy. The inspector visually assessed both the bristle diameter and the presence of microplastic chips that remained attached to the ends of the toothbrush bristles under light microscopy (40× magnification). Results: All toothbrush bristles met the criteria for soft bristles (diameters ranging from 0.2 to 0.25 mm). The incidence of microplastic chips varied among toothbrush bristles, ranging from a minimum of 3.6% to a maximum of 86.2%. Notably, toothbrushes with smaller diameter bristles exhibited higher levels of microplastic chips. Conclusions: This study confirmed that the trimming conditions of toothbrush bristles and the occurrence of microplastic chips vary among different toothbrushes. Our findings suggest that toothbrush manufacturers need to improve their manufacturing processes to prevent the generation of microplastic chips during bristle trimming.

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  • Original Article 2024-03-30

    Comparison of oral health problems and behavior between daytime and shift workers

    Min-ji Oh , Heung-Soo Lee

    Abstract : Objectives: This study aimed to not only compare the oral health problems and behavior of daytime and shift workers but also investigate the effects of work type on oral health behavior to help improve occupational oral health policies and systems. Methods: Workers from three different workplaces in Jeollabuk-do were selected through convenience sampling. After posting a study recruitment notice, an online self-administered questionnaire (Naver form, Naver corp., Korea) was used to collect data. A total of 314 participants, including 179 daytime workers and 135 shift workers, were included in the final analysis. Results: Shift workers had a higher periodontal disease index and smoking rate compared with daytime workers (P

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