JKAOH Journal of Korean Academy of Oral Health

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

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  • Original Article 2020-12-30

    The effect of dentifrice including dental type silica, tocopherol acetate, sodium fluoride and sodium pyrophosphate on mineral density in enamel

    Ho-Ki Jung , Sun-Young Chung , Yong-Su Ahn , Kyong-Hoon Shin , Ja-Won Cho

    Abstract : Objectives: In this study, we aimed to investigate the preventive and protective effects of new dentifrice containing dental type silica, tocopheryl acetate, fluorides, and sodium pyrophosphate on the mineral density of teeth and demineralization of tooth surfaces.Methods: A total of 119 bovine teeth pre-treated with the new dentifrice at three different concentrations for the experiment were randomly allocated into two control (DW and PW) and one experimental (EC) groups. The enamel surface of all bovine teeth were demineralized using an artificial demineralization solution. The dentifrice was diluted with distilled water (DW) at 1:1, 1:2, and 1:3 ratios. The samples were treated with the demineralization solution for 4 h after treatment with the supernatants of each diluted dentifrice for 30 min, and this procedure was repeated 3 times over a period of 24 h. The samples were examined using micro-CT to determine the amount of reduced bone mineral density (BMD) comparing the control and experimental dentifrices. The surface changes of the samples were also examined using the scanning electron microscope (SEM).Results: The average BMD of the bovine enamel surface between the treated and non-treated area with the dimineralization solution was significantly different in the control, DW, PW 1:1, PW 1:2, and PW 1:3 groups. However, there was no significant difference observed in the experimental groups, including EC 1:1, EC 1:2, and EC 1:3. The average BMD of the dimineralized surfaces based on the results of the 7 groups was significantly higher in every EC group when compared to the DW and three PW groups.Conclusions: The new dentifrice containing dental type silica, tocopheryl acetate, fluorides, and sodium pyrophosphate is effective in inhibiting the decrease in BMD and demineralization of enamel surface, which was observed when the new dentifrice and demineralization solution was repeatedly applied to the samples for 24 h.

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  • Original Article 2021-03-30

    An exploratory study of the patients for the consultation and use of preventive dental service

    Hyunju Park , Jaein Ryu , Hyangah Park

    Abstract : Objectives: This study aims to identify the factors related to the consultation and use of preventive dental services among patients visiting dental clinics. Methods: The self-reporting questionnaire survey was conducted among patients in Busan, South Korea, and overall, 319 patients participated in this study, with a response rate of 83.9%. Results: Among the study participants, 74.6% stated that preventive service was necessary and 193 patients (60.5%) agreed to undergo consultation for preventive dental service. Consequently, 66.3% of patients who underwent consultation agreed to participate in preventive dental service. The most popular reason provided to receive this service was “to maintain teeth longer” (72.9%), whereas the common factor for declining was “lack of time” (49.3%). Most people who did not attend the consultation of preventive dental service mentioned that the dental staff “did not recommend the consultation” (43.9%). Logistic regression analysis for the consultation and service use for preventive dental service showed that dental clinics, age, and satisfaction were the most influential factors. Conclusions: Both the characteristics of patients and dental clinics were important factors for people to agree to the consultation and use of preventive dental services. If dental staff launch efforts to improve the quality of service for the satisfaction of patients, it will increase participation in preventive dental services, which could help promote oral health and patients’ quality of life.

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  • Original Article 2020-12-30

    Studies on inhibition of gingival fibroblast proliferation by nicotine concentration

    Kang-Uk Han , Cheon-Hee Lee , Joon-Haeng Lee , Yeol-Mae Jeon , Hyun-Jun Yoo

    Abstract : Objectives: To investigate the effect of nicotine on the healing of an oral cavity wound, high and low concentrations of nicotine were administered on human gingival fibroblasts.Methods: Nicotine at concentrations of 0.1, 1, 5, and 10 mM were administered to gingival fibroblasts to evaluate the survival capability of the cells. Nicotine at 0.1 mM, a nonapoptotic concentration, was administered to evaluate apoptosis using Annexin V-FITC/Propidium Iodide cell staining. Nicotine at 1, 10, and 100 µM were administered to measure the expression of inflammatory cytokines, which was measured by RT-PCR and ELISA. FGF was treated with an additional 1, 10, or 100 µM of nicotine to evaluate cell proliferation and wound healing.Results: As the concentration of nicotine increased (0.1, 1, 5, and 10 mM), the survival capability of the cells reduced. When cells were exposed to low nicotine concentration (0.1 mM) for 24 h, apoptosis occurred. Moreover, if the cell was exposed for 48 h, cell apoptosis occurred with necrosis. As the concentration of nicotine increased (1, 10, and 100 µM), more inflammatory cytokines were expressed. When EC LPS and TF LPS were combined with a low concentration of nicotine (1 and 10 mM), the expression of inflammatory cytokines was suppressed. The FGF level decreased as the nicotine concentration increased (1, 10, and 100 µM).Conclusions: Nicotine interferes with the wound healing process of gingival fibroblasts. To maintain the wound healing process after a surgery or dental procedure, cessation of smoking is recommended.

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  • Original Article 2020-12-30

    The effect of socio-psychological trait on the oral health related quality of life among college students

    Byung-Su Kim , Jae-Gyu Jeon , Hyo-Won Oh

    Abstract : Objectives: The purpose of this study was to examine the association between oral health-related quality of life and adult attachment type among college students.Methods: A total of 557 self-administered questionnaires were collected from undergraduates in Jeonbuk. Data were analyzed using SPSS 22.0. The results were analyzed using t-tests, analyses of variance, Duncan’s multiple range tests, correlation analyses, and multiple regression analyses.Results: The results of this study showed that sex and age were significant factors according to the analysis of the oral health-related quality of life in terms of general characteristics. The variable that had the greatest effect on the oral health-related quality of life was attachment anxiety, followed by age, sex, and attachment avoidance.Conclusions: Education and counseling to promote safety of adult attachment will improve the oral health-related quality of life for college students.

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  • Original Article 2020-12-30

    The prevalence of taurodontism in primary molar and correlation with permanent first molar

    Seunghee Woo , Jongsoo Kim , Joonhaeng Lee , Jongbin Kim

    Abstract : Objectives: The purpose of this study was to investigate the prevalence of permanent first molar taurodontism and identify the correlation between primary molars and permanent first molar taurodontism.Methods: Among the 10,113 children who underwent panoramic radiography at a dental hospital from January 2010 to December 2019, 685 children (404 boys, 281 girls) were included in this study.Results: Six children (0.8%) and 98 children (14.1%) showed taurodontism of the primary molars and permanent first molar, respectively. All of the children with taurodontism in the primary molars had at least one taurodontism in the permanent first molars.Conclusions: Early diagnosis of taurodontism in primary molars might allow dentists to make treatment plans in accordance with tooth development.

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  • Original Article 2021-03-30

    Association obesity and periodontal disease - Using the Korean National Health and Nutrition Examination Survey (KNHANES) 2016-2018

    Young-Seok Kim , Eun-Kyong Kim

    Abstract : Objectives: This study aimed to confirm the correlation between BMI and the prevalence of periodontal disease in adults, using data from the National Health and Nutrition Survey. Methods: The data included general characteristics and oral examination results of individuals surveyed in the 7th National Health and Nutrition Survey (2016-2018). Among the variables examined, age, gender, education, income, obesity, hypertension, diabetes, high cholesterol, smoking/drinking, oral examination, and brushing habits were considered as the general characteristics of the study participants. Individuals with more than 4 mm depth of the periodontal pocket were defined as having periodontal disease. BMI was classified into underweight (BMI<18.5 kg/m2) and normal (18.5 kg/m2<BMI). Of the 16,119 persons who completed the health survey, 11,269 were analyzed, excluding those aged below 19 and individuals with missing values. Results: The prevalence of periodontal disease was higher among men, those who were older, came from a lower socioeconomic background, were obese, and had hypertension, diabetes, and hypercholesterolemia (P<0.0001). The prevalence of periodontal disease was 1.26 times (95% CI: 1.12-1.40) higher among the obese compared to individuals with a normal BMI, with the incidence being 1.28 times (95% CI: 1.03-1.43) and 1.21 times (95% CI: 1.10-1.49) higher in women and men, respectively. Additionally, the prevalence of periodontal disease was 1.35 times (95% CI: 1.14-1.59) higher among those who were obese than those with normal BMI in individuals above 60 years. Conclusions: Even among the obese, the incidence of periodontal disease differs according to gender and age. Therefore, it is imperative to implement an appropriate oral care program taking the aforementioned characteristics into account.

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  • Editorial 2021-06-30

  • Original Article 2021-03-30

    Genotype distribution of Porphyromonas gingivalis among smokers

    Jin-Kyoung Kim , Ji-Hye Kim , Keun-Bae Song , Youn-Hee Choi

    Abstract : Objectives: The purpose of this study was to determine the difference in the genotype distribution of Porphyromonas gingivalis (P. gingivalis), the main cause of periodontal disease, according to smoking status. Methods: Two hundred thirty adults with periodontal disease were selected as subjects and were classified into either a smoking or non-smoking group. Smoking behavior was assessed with a self-administered questionnaire, and subgingival plaque was collected and analyzed using polymerase chain reaction to confirm the P. gingivalis genotype. For statistical analysis, SPSS Ver 25.0 was used. Results: P. gingivalis was expressed in 224 subjects (97.4%), and there was no difference in its expression rate according to smoking. However, there was a significant difference in smoking in type III genotype and smoking period in type II genotype with P. gingivalis (P =0.003). Conclusions: Although smoking was not related to the overall distribution of P. gingivalis, increased volume and duration may inhibit the expression of type II and type III genotypes.

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  • Editorial 2021-12-30

  • Original Article 2021-06-30

    Association between masticatory function and cognitive impairment in the elderly

    Taejun Park , Hyojin Heo , Min-Jeong Cho , Hyeon Chang Kim , Yoosik Youm , Keun-Bae Song , Youn-Hee Choi

    Abstract : Objectives: With the surge in the elderly population, a growing interest in the prevention and treatment of geriatric diseases has been observed, along with awareness of the severity of problems associated with dementia, a cognitive impairment. The purpose of this study was to investigate the correlation between chewing ability and cognitive function among elderly people residing in a rural area. Methods: A total of 162 elderly individuals, aged between 65 and 97 years, were surveyed. Trained examiners conducted interviews and assessments of chewing ability, on the basis of the number of remaining teeth, denture status, masticatory performance evaluating gum, ShadeEye-NCC measuring overall change in color of the gum (ΔE), and T-Scan®III analyzing distribution of occlusion patterns. Cognitive function was assessed using the Korean version of the Mini-Mental State Examination-Dementia Screening (MMSE-DS) tool. Results: Participants with a low score in the MMSE-DS were found to have distinguishably lower denture need, smaller number of remaining teeth, and lesser color change in the masticatory performance evaluating gum. In the cognitive impairment group, a tendency of having unilateral and anterior occlusion led to occlusal discomfort and chewing difficulties. Conclusions: The study highlights important associations between chewing ability and cognitive function. The finding corroborates that tooth loss may be a predictive risk factor for cognitive impairment.

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June, 2022
Vol.46 No.2

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