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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Abstract : Objectives: The water fluoridation program in Hapcheon township area has been implemented since 2000. This study aimed to evaluate the caries-preventive effect of water fluoridation on permanent teeth after implementation of an 18-year community water fluoridation program in a suburban area.Methods: A survey was conducted in 2018 with 359 subjects, aged 8, 10, and 12 years, residing in the Hapcheon township area. In this prospective cohort study, the data on caries prevalence obtained from 671 subjects, aged 8, 10, and 12 years, in 2000, when the community water fluoridation program was initiated in the township, were used as a cohort to evaluate the caries-preventive effect after 18 years. The caries-preventive effect of community water fluoridation on permanent teeth was estimated by comparison of the adjusted DMFT scores between the program and the control group, and between the pre- and post-program data after 18 years. The confounding factor, mean number of fissure-sealed teeth, was adjusted to estimate the caries-preventive effect of fluoridation on permanent teeth.Results: Based on the results of the surveys conducted in Hapcheon-eup in 2000 and 2018, the mean number of fissure-sealed permanent teeth was 2.24 in 2000 and 1.38 in 2018. The mean DMFT scores of subjects aged 8, 10, and 12 years in 2018, adjusted for fissure-sealed permanent teeth in the fluoridated area, were significantly lower than those reported by the 2018 Korea National Children’s Oral Health Survey. In addition, the mean values of the adjusted DMFT scores of subjects aged 8, 10, and 12 years in 2018, after the 18-year fluoridation program, were significantly lower than those reported in 2000, the year the fluoridation program was initiated.Conclusions: Community water fluoridation has a high caries-reducing effect; thus, the reintroduction of water fluoridation program is desirable to prevent dental caries.
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Abstract : Objectives: In this study, I aimed to evaluate the inhibitory effect of bile acids on the inflammatory response and osteoclastogenesis in RAW 264.7 cells activated through lipopolysaccharide (LPS) and receptor activator of nuclear factor-κB ligand (RANKL) of the periodontal pathogen Porphyromonas gingivalis.Methods: Myelomonocytic RAW 264.7 cells were activated through P. gingivalis LPS to induce inflammatory response, and were treated with three bile acids, including taurodeoxycholate, taurocholate, and glycocholate at different concentrations. The cytotoxicity of bile acids was assessed through the MTT assay. To evaluate the inhibitory effect of bile acids on inflammatory response, the induction levels of the pro-inflammatory cytokines, such as interleukin (IL)-6 and tumor necrosis factor (TNF)-α were measured using ELISA 12 h after the treatment. Additionally, after activating the cells with RANKL to promote osteoclastogenesis, we examined whether bile acids suppressed osteoclast differentiation using the tartrate-resistant acid phosphatase staining.Results: In the cell viability test, taurodeoxycholate and taurocholate did not exhibit any cytotoxic effect on RAW 264.7 cells at concentrations equal to or less than 200 µM, and glycocholate was non-cytotoxic until the maximal concentration (4,000 µM). All the three bile acids exhibited an inhibitory effect on inflammatory response, as the production levels of pro-inflammatory cytokines, including IL-6 and TNF-α, decreased with an increase in the concentration of the three bile acids in a dose-dependent manner. The expression of IL-6 reduced remarkably upon treatment with taurodeoxycholate and glycocholate (P<0.001), while the expression of TNF-α decreased slightly upon treatment with glycocholate (P<0.05). Moreover, only glycocholate at a concentration of 1,000 µM suppressed osteoclast differentiation of RAW 264.7 cells (P<0.001), while taurodeoxycholate and taurocholate did not exhibit an inhibitory effect on osteoclastogenesis.Conclusions: Here, I showed that all the three bile acids (taurodeoxycholate, taurocholate, and glycocholate) inhibited P. gingivalis LPS-induced inflammatory response, and glycocholate partially suppressed RANKL-mediated osteoclastogenesis in RAW 264.7 cells.
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Abstract : Objectives: Previous studies have suggested that the lactic acid bacterium, Weissella cibaria CMU has beneficial effects on halitosis, but its precise effects have not been evaluated in human subjects. We evaluated the efficacy and safety of W. cibaria CMU for reducing halitosis in adults (20-70 years old) whose exhibited volatile sulfur compound (VSC) concentrations exceeded 0.015 ng/mL and who scored ≥2 points in a halitosis sensory evaluation test.Methods: A total of 60 participants were assigned to an experimental group (treated with W. cibaria CMU) and a control group (placebo). In total, 58 out of 60 participants (experimental group, 29; control group, 29) were ultimately included in gas chromatography (OralChroma) analyses of VSC concentrations and halitosis sensory evaluation tests.Results: We found that the VSC concentration decreased by 0.030±0.062 ng/ml in the experimental group after 8 weeks (P=0.0138) and increased by 0.005±0.124 ng/ml in the control group (P=0.8198). However, the difference between groups was not statistically significant (P>0.05). In a sensory evaluation test, a significantly lower score was obtained for the experimental group than for the control group.Conclusions: Overall, VSC concentrations and sensory evaluation scores were lower in the experimental group than in the control group, but only the latter was statistically significant. Thus, we conclude that W. cibaria CMU is involved in the reduction of halitosis.
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Abstract : Objectives: Studies on oral health care in North Korea are being pursued in South Korea. However, the covertness of North Korea offers substantial resistance to the access of information from the country, including in the field of oral health care. In this study, we explored North Korea’s oral health care policy and its status in the Kim Jong-Un Era. Methods: We used existing information from Internet searches and also interviewed three health care professionals who had recently contact with North Korea. Results: At present, there are four development policies of oral health care in North Korea: expansion of dental institutions and resource support, strengthening the prevention and treatment of dental diseases, improvement of dental prosthetics, and increasing the responsibility and role of the dental workforce. In addition, there has been an increasing interest in children’s oral health with the development of a few programs. Conclusions: In order to improve overall oral health care, cooperation is required from North Korea in accessing relevant information in the field of children’s oral health, dental prosthetics, and dental materials. For this to occur, there should be a preliminary trust building process between North Korea and South Korea as well as access to information from reliable sources.
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Abstract : Objectives: This study aimed to estimate the financial budget of fluoride application in the National Health Insurance. Methods: The amount of fluoride application was calculated by using the sealant rate (utilization rate 1), dental examination rate (utilization rate 2), and the average rate of these two (utilization rate 3) in children and adolescents. For the next five years, 100% of the existing fees were applied to estimate the financial budget. Results: The total budget for children and adolescents was estimated to be 22.0 billion won minimum and 83.5 billion won maximum in the first year, and 104.8 billion won minimum and 398.5 billion won maximum up to the next five years. Moreover, in high risk groups, the total budget was estimated to be 4.2 billion won minimum and 16.1 billion won maximum in the first year, and 18.6 billion won minimum and 70.8 billion won maximum up to the next five years. Conclusions: The financial budget of fluoride application coverage for children and adolescents was similar or lower than that of the current dental sealants. It needs to implement promptly with the reason of financial saving over the long-term point of view. Based on this evidence, it is affordable and necessary to begin to promote oral health for children and adolescents.
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Abstract : Objectives: In this study, we aimed to investigate the cardiopulmonary resuscitation (CPR)-related knowledge, attitude, and performance among dental hygienists working in the hospitals. We believe that it is important to develop CPR education programs that would enable dental hygienists to offer accurate and timely aid in emergency situations.Methods: From June 20 to August 20, 2019, 220 dental hygienists at seven selected dental hospitals located in Gwangju Metropolitan City and Jeollanam-do, South Korea were requested to fill a questionnaire as part of a survey.The data regarding the general characteristics, CPR-related characteristics, and CPR-related knowledge, approach, and performance were collected, and analyzed using independent t-tests, one-way analysis of variance (ANOVA), Pearson’s correlation coefficient, and simple regression analysis using the SPSS Windows ver. 25.0.Results: Correlation analysis revealed that high CPR-related knowledge and a more positive approach towards CPR are both associated with high confidence in performing CPR (r=0.37, r=0.415, r=0.605). Furthermore, factors, such as high CPR-related knowledge, positive attitude towards CPR, knowledge regarding the location of automated external defibrillators (AEDs) in the hospital, and AED training experience significantly affects the CPR-related performance.Conclusions: Therefore, it is important to develop systematic and beneficial educational programs and provide and update educational material regularly in dental hospitals with an aim to improve CPR-related knowledge and attitude among the dental hygienists.
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Abstract : Objectives: The aim of this study was to examine the antibacterial effect of mastic oil on a representative caries-inducing bacterium, Streptococcus mutans.Methods: S. mutans UA159 was maintained in a BHI medium containing 0.1% sugar at 37℃ and 10% CO2. Strains were treated with six different concentrations of mastic oil (0, 0.1, 0.2, 0.3, 0.4, 0.5%). After incubation for 16 h, the antibacterial effect was evaluated by measuring the optical density (OD) and observing the colony-forming unit. A microtiter plate assay was performed to analyze the anti-adhesion ability of mastic oil on S. mutans.Results: More than 0.1% of mastic oil inhibited the growth of S. mutans. In addition, 0.4% mastic oil exterminated S. mutans. Mastic oil induced an anti-adhesive ability in S. mutans.Conclusions: These results suggest that mastic oil may be used as a preventive measure against dental caries.
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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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J Korean Acad Oral Health 2020; 44(3): 158-165
J Korean Acad Oral Health 2020; 44(4): 187-193
J Korean Acad Oral Health 2020; 44(3): 151-157
Min-Jeong Cho, Eun-Kyung Jung, Sang-Sook Lee, Youn-Hee Choi, Keun-Bae Song
Journal of Korean Academy of Oral Health 2015; 39(3): 214-219
Man-Kyong Kim, Ji-In Jung, Min-Ji Kim, Eun-Joo Jun, Han-Na Kim, Se-Yeon Kim, Dong-Hun Han, Seung-Hwa Jeong, Jin-Bom Kim
Journal of Korean Academy of Oral Health 2014; 38(2): 118-128
Hyo-Jin Lee, Kwang-Hak Bae
Journal of Korean Academy of Oral Health 2014; 38(3): 165-169
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