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Effects of Bamboo Salt with Sodium Fluoride on the Prevention of Dental Caries

Journal of Dental Hygiene Science.2019;19(4):288-293. doi:10.17135/jdhs.2019.19.4.288

BACKGROUND: Dental caries is one of several prevalent oral diseases caused by dental plaque biofilms. This study evaluated the anti-cariogenic effects of a bamboo salt (BS) and sodium fluoride (NaF) mixture on oral bacteria.METHODS: The effects of several mixtures of NaF and BS on acid production, growth, and adhesion to glass beads of Streptococcus mutans, and their anti-cariogenic properties were investigated. The growth of S. mutans was measured according to optical density at 3, 6, 9, 12, 15, 18, and 24 hours after treatment using spectrophotometry at a wavelength of 600 nm, while pH was measured using a pH meter. Adhesion of S. mutans was measured according to the weight of glass beads from each group before and after incubation. Gene expression was measured using real-time polymerase chain reaction. Acid production and growth patterns of S. mutans were compared using repeated measures analysis of variance, followed by Scheffe's post-hoc test. The Kruskal–Wallis test was used to compare adhesion, followed by the Mann–Whitney test. Gene expression in the experimental and control samples was compared using the Student's t-test.RESULTS: Growth, acid production, and adhesion of S. mutans were inhibited in all experimental groups. Expression of gft and fructosyltransferase in S. mutans was inhibited in all groups. A mixture of NaF and BS significantly reduced growth, acid production, adhesion, and gene expression of S. mutans compared with the other groups.CONCLUSION: Results of the present study demonstrated that a mixture of NaF and BS was useful as a mouth rinse in preventing dental caries.
Bacteria ; Biofilms ; Dental Caries ; Dental Plaque ; Gene Expression ; Glass ; Hydrogen-Ion Concentration ; Mouth ; Real-Time Polymerase Chain Reaction ; Sodium Fluoride ; Sodium ; Spectrophotometry ; Streptococcus mutans

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The Effects of Orofacial Myofunctional Training on the Changes of Lip and Tongue Strength in Elderly People

Seol Hee KIM ; Min Ju KIM ; Seung Hyun LEE ; Bo Wha CHOI ; Yae Jee HEO

Journal of Dental Hygiene Science.2019;19(4):279-287. doi:10.17135/jdhs.2019.19.4.279

BACKGROUND: Increasing age and loss of teeth weaken oral muscle strength. This study aimed to investigate the positive effects of orofacial myofunctional training on elderly people.METHODS: Thirty six elderly individuals in a welfare center and a senior citizen center were included in this study. A survey regarding lip and tongue strength suvsequent to orofacial myofunctional training and oral health-related quality of life was conducted from April to June, 2019. Data were analyzed using PASW statistics ver. 18.0.RESULTS: The experimental group, showed an increase in lip strength (from 9.79 to 10.31) and tongue strength (from 41.26 to 43.97) after orofacial myofunctional training. The perception of oral health-relatedquality of life was enhanced (from 2.26 to 2.07). In particular, the frequency of dry cough for food removal while swallowing decresed due to an incresed in the secretion of saliva (p<0.05). Correlation analysis showed that the number of functional teeth was positively related to oral health-related quality of life.CONCLUSION: Orofacial myofunctional training for improving lip and tongue strength is effective in the elderly. In older societies, oral strength should be maintained to improve oral health-related quality of life. It also suggests the interest of oral health workers and applying orofacial myofunctional training programs.
Aged ; Cough ; Deglutition ; Education ; Humans ; Lip ; Muscle Strength ; Myofunctional Therapy ; Oral Health ; Quality of Life ; Saliva ; Tongue ; Tooth

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Factors Affecting Clinical Competence in Dental Hygiene Students

Hyun Ok LEE ; Sun Mi KIM

Journal of Dental Hygiene Science.2019;19(4):271-278. doi:10.17135/jdhs.2019.19.4.271

BACKGROUND: This study aimed to examine the factors that influence clinical performance of dental hygiene students to provide useful data for developing strategies to improve clinical competence.METHODS: The effects of variables on clinical competence by quantile level were analyzed using quantile regression analysis in 247 dental hygiene students. Quantile regression and multiple regression analyses were conducted using the Stata 11.0 program to analyze predictors of clinical competence.RESULTS: The clinical competence score of dental hygiene students was 42.69±5.90, the satisfaction of clinical practice was 49.90±7.44, the clinical practice stress was 50.62±7.37, and the professional self-concept was 31.68±4.41. Empathy was the highest at 50.87±4.93. Multiple regression analysis showed that school year, stress from clinical training, satisfaction with clinical training, professional self-concept, and empathy had significant impact on clinical competence. Quantile regression analysis showed that the effects varied depending on the clinical competence level. School year and professional self-concept had a significant positive effect, regardless of the clinical competence level, while empathy had a significant positive effect at the top 10% (Q90) of the clinical competence level. Satisfaction with clinical practice affected clinical competence at Q25, Q50, and Q90. Stress from clinical practice had significant effects at Q25, Q50, and Q90 (p<0.05).CONCLUSION: According to the study results, different factors affected clinical competence according to the quantile of clinical competence. This study provides valuable implications for designing clinical competence enhancement programs and strategies. In addition, objective indicators for considering factors that may affect the clinical competence, such as academic competence and satisfaction of practice hospitals, are expected to require detailed analysis and measures.
Clinical Competence ; Empathy ; Humans ; Mental Competency ; Oral Hygiene

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Effect of Commercial Effervescent Vitamin Tablets on Bovine Enamel

Moon Jin JEONG ; Myoung Hwa LEE ; Soon Jeong JEONG ; So Jeong KIM ; Myeong Ji KO ; Hye Won SIM ; Ju Young LEE ; Ae Jung IM ; Do Seon LIM

Journal of Dental Hygiene Science.2019;19(4):261-270. doi:10.17135/jdhs.2019.19.4.261

BACKGROUND: In this study, four types of effervescent vitamins marketed in Korea were analyzed for their acidity and vitamin content. For this purpose, bovine teeth were immersed in vitamin, and surface microhardness and appearance were measured before and after immersion to evaluate tooth demineralization and erosion.METHODS: Bovine permanent incisors with sound surface enamel were cut to 5×5 mm size, embedded in acrylic resin, and polished using a polishing machine with Sic-paper. The prepared samples were analyzed for pH, vitamin content, and surface hardness before and after immersion using a surface microhardness meter. Demineralization of surface dental enamel was observed using a scanning electron microscope.RESULTS: The average pH of the four effervescent vitamins was less than 5.5; the pH of the positive control Oronamin C was the lowest at 2.76, while that of the negative control Samdasoo was the highest at 6.86. The vitamin content was highest in Berocca and lowest in the DM company Multivitamin. On surface microhardness analysis, surface hardness values of all enamel samples were found to be decreased significantly after 1 and 10 minutes of immersion (p<0.05). After 10 minutes of immersion, there was a significant difference in the decrease in hardness between the experimental groups (p<0.05). Scanning electron microscopy observation showed that dental enamel demineralization after 10 minutes of immersion was the most severe in Oronamin C except for Samdasoo, followed by DM company Multivitamin and VitaHEIM. Immersion in BeroNew and Berocca resulted in similar effects.CONCLUSION: There is a risk of tooth erosion due to decreased tooth surface microhardness when using the four types of effervescent vitamins and vitamin carbonated beverages with pH below 5.5. Therefore, high pH vitamin supplements are recommended to prevent tooth erosion.
Carbonated Beverages ; Dental Enamel ; Hardness ; Hydrogen-Ion Concentration ; Immersion ; Incisor ; Korea ; Microscopy, Electron, Scanning ; Tablets ; Tooth ; Tooth Demineralization ; Tooth Erosion ; Vitamins

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Baicalein Treatment Promotes Osteoblast Proliferation and Osteogenic Differentiation through Activation of Immediate Early Response 3

Sang Im LEE

Journal of Dental Hygiene Science.2019;19(4):254-260. doi:10.17135/jdhs.2019.19.4.254

BACKGROUND: The primary aims of periodontal disease treatment is to remove dental plaque and calculus, the main causes of tooth loss, and restore periodontal tissue destroyed by inflammation. Periodontal disease treatment should also help maintain the alveolar bone, alleviate inflammation, and promote periodontal ligament cell proliferation, which is essential for tissue regeneration. Conventional antibiotics and anti-inflammatories have adverse side effects, especially during long-term use, so there is a need for adjunct treatment agents derived from natural products. The purpose of this study was to investigate whether the herbal flavone baicalein has the osteogenic activity under inflammatory conditions, and assess the involvement of osteoblast immediate early response 3 (IER3) expression.METHODS: Human osteoblastic MG-63 cells were cultured with the pro-inflammatory cytokines tumor necrosis factor α and interleukin 1β in the presence and absence of baicalein. Proliferation was assessed using the 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide assay, and expression of IER3 mRNA was assessed using real-time polymerase chain reaction. The expression of IER3 protein levels and activation of associated signal transduction pathways were assessed using western blotting.RESULTS: Baicalein increased IER3 mRNA and protein expression synergistically. In addition, baicalein reversed the suppression of cell proliferation, and the downregulation of osteogenic transcription factor runt-related transcription factor 2 and osterix induced by pro-inflammatory cytokines. Baicalein also upregulated the phosphorylation of c-Jun N-terminal kinase (JNK) and extracellular signal-regulated kinase (ERK 1/2). The upregulation of IER3 by pro-inflammatory cytokines was blocked by pretreatment with inhibitors of AKT, p38, JNK, and ERK 1/2.CONCLUSION: Baicalein mitigates the deleterious responses of osteoblasts to pro-inflammatory cytokines. Further, IER3 enhanced the effect of baicalein via activation of AKT, p38, JNK, and ERK pathways.
Anti-Bacterial Agents ; Anti-Inflammatory Agents ; Biological Products ; Blotting, Western ; Calculi ; Cell Proliferation ; Cytokines ; Dental Plaque ; Down-Regulation ; Humans ; Inflammation ; Interleukins ; JNK Mitogen-Activated Protein Kinases ; MAP Kinase Signaling System ; Osteoblasts ; Osteogenesis ; Periodontal Diseases ; Periodontal Ligament ; Phosphorylation ; Phosphotransferases ; Real-Time Polymerase Chain Reaction ; Regeneration ; RNA, Messenger ; Signal Transduction ; Tooth Loss ; Transcription Factors ; Tumor Necrosis Factor-alpha ; Up-Regulation

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Relationships between Depression, Oral Dryness, and Oral Health-Related Quality of Life among Elderly in Korea

So Jung MUN ; Su Kyung PARK ; Ji Eun HEO ; Da Yee JEUNG ; Won Gyoun CHUNG ; Ma I CHOI ; Hyun Sun JEON

Journal of Dental Hygiene Science.2019;19(4):245-253. doi:10.17135/jdhs.2019.19.4.245

BACKGROUND: This study aimed to analyze correlations between depression, cognitive function, oral health state, ability to perform activities of daily living, oral dryness symptoms, and oral health-related quality of life, and determine factors influencing the latter.METHODS: This was a cross-sectional study based on questionnaires completed by 260 participants with suspected dementia, residing in South Korea. Psychiatrists, psychiatric nurses, and dental hygienists visited clinics in the participating regions for examination and questionnaire administration. General characteristics, the geriatric depression scale, ability to perform activities of daily living, cognitive function, oral health state, and oral health-related quality of life were analyzed. Independent t-tests, one-way analysis of variance (ANOVA), correlation analysis and multiple regression analysis were conducted, identifying factors affecting oral health-related quality of life. Data analysis was performed using SPSS ver. 20.0 (IBM Corp., USA), and the significance was set at p<0.05.RESULTS: Approximately 65.0% of participants were female, 63.5% were in their 70s, and 90.0% had health insurance. About 21.5%, 42.0%, and 36.5% were normal, slightly impaired, and had dementia, respectively. High cognitive impairment was associated with poor oral health. Sex, education levels, marital status, and living arrangements influenced oral health-related quality of life. According to the regression analysis, geriatric depression and oral dryness affected the Geriatric Oral Health Assessment Index scores.CONCLUSION: In conclusion, oral dryness and depression levels among elders influenced oral health-related quality of life. The results showed that to enhance elders' oral health-related quality of life, it is essential to not only improve their oral health state, but also relieve oral health problems, especially oral dryness, and take into consideration their psychological aspects.
Activities of Daily Living ; Aged ; Cognition ; Cognition Disorders ; Cross-Sectional Studies ; Dementia ; Dental Hygienists ; Depression ; Education ; Female ; Humans ; Insurance, Health ; Korea ; Marital Status ; Oral Health ; Psychiatry ; Quality of Life ; Residence Characteristics ; Statistics as Topic

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Assessment of Internal Fitness on Resin Crown Fabricated by Digital Light Processing 3D Printer

Wol KANG ; Min Su KIM ; Won Gi KIM

Journal of Dental Hygiene Science.2019;19(4):238-244. doi:10.17135/jdhs.2019.19.4.238

BACKGROUND: Recently, three-dimensional (3D) printing has been hailed as a disruptive technology in dentistry. Among 3D printers, a digital light processing (DLP) 3D printer has certain advantages, such as high precision and relatively low cost. Therefore, the latest trend in resin crown manufacturing is the use of DLP 3D printers. However, studies on the internal fitness of such resin crowns are insufficient. The recently introduced 3D evaluation method makes it possible to visually evaluate the error of the desired area. The purpose of this study is to evaluate the internal fitness of resin crowns fabricated a by DLP 3D printer using the 3D evaluation method.METHODS: The working model was chosen as the maxillary molar implant model. A total of 20 resin crowns were manufactured by dividing these into two groups. One group was manufactured by subtractive manufacturing system (PMMA), while the other group was manufactured by additive manufacturing system, which uses a DLP 3D printer. Resin crowns data were measured using a 3D evaluation program. Internal fitness was calculated by root mean square (RMS). The RMS was calculated using the Geomagic Verify software, and the mean and standard deviation (SD) were measured. For statistical analysis, IBM SPSS Statistics for Windows ver. 22.0 (IBM Corp., USA) was used. Then, independent t-test was performed between the two groups.RESULTS: The mean±SD of the RMS were 41.51±1.51 and 43.09±2.32 for PMMA and DLP, respectively. There was no statistically significant difference between PMMA and DLP.CONCLUSION: Evaluation of internal fitness of the resin crown made using a DLP 3D printer and subtractive manufacturing system showed no statistically significant differences, and clinically acceptable results were obtained.
Crowns ; Dentistry ; Imaging, Three-Dimensional ; Methods ; Molar ; Polymethyl Methacrylate ; Printing, Three-Dimensional

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Effect of Allergic Rhinitis and Asthma on Oral Health

Chang Suk KIM ; Kyeong Soo LEE

Journal of Dental Hygiene Science.2019;19(4):228-237. doi:10.17135/jdhs.2019.19.4.228

BACKGROUND: This study aimed to investigate allergic rhinitis and the relationship between allergic diseases, such as asthma and allergic rhinitis, and dental caries and periodontal disease using the raw data from third year of the 6th Korean National Health and Nutrition Examination Survey.METHODS: A total of 3,729 subjects aged over 30 years who underwent examination for allergic diseases and an oral health checkup were selected. The data were analyzed using SPSS IBM SPSS ver. 25.0 (IBM Corp., USA). Composite sample cross correlation and composite sample logistic regression analyses were performed using the composite sample general linear model.RESULTS: On examining the socioeconomic characteristics of the subjects suffering from allergic disease and the relationship between allergic disease and oral health, allergic rhinitis was more frequently found in younger subjects with a higher level of education. Periodontal disease and dental caries were more frequent among female, older age groups, lower income earners, and subjects with a lower level of education (p<0.05). On examining the relationship between the oral health characteristics of the subject and allergic diseases and oral health, allergic rhinitis was more common in subjects with a good oral health status perception than those who answered “bad” to the oral health status question. The community periodontal index of treatment needs (CPITN) score was higher in subjects who answered “poor” to the oral health status question, lower frequency of brushing, and higher in subjects using secondary oral hygiene products; the decayed, missing and filled teeth (DMFT) index was higher in subjects with a perception of poor oral health status (p<0.05). The DMFT index was high in the asthma group, and the CPITN score was high in the group who answered “no” to allergic rhinitis.CONCLUSION: There is a relationship between asthma and allergic rhinitis and the DFMT index and CPITN score. Corresponding oral programs for allergic patients need to be developed.
Asthma ; Dental Caries ; Education ; Female ; Humans ; Linear Models ; Logistic Models ; Nutrition Surveys ; Oral Health ; Oral Hygiene ; Periodontal Diseases ; Periodontal Index ; Rhinitis, Allergic ; Tooth

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Effects of the 4C Core Competencies on Work Ability among Dental Hygienists

Do Young KIM ; Kyeung Ae JANG

Journal of Dental Hygiene Science.2019;19(4):220-227. doi:10.17135/jdhs.2019.19.4.220

BACKGROUND: This descriptive study aimed to examine the relationship between the 4C core competencies and work ability among dental hygienists.METHODS: From November 2018 to January 2019, data were collected-from 190 dental hygienists workong in dental clinics in Busan, Ulsan, and Gyeongsangnam province using structured questionnaires. For the general characteristics of the dental hygienists, frequency and percentage were calculated, and the level of the 4C core competencies and work ability of dental hygienists was calculated using means and standard deviations. A multiple regression analysis was conducted to analyze the effects of the 4C core competencies on work ability.RESULTS: The mean scores for the 4C core competency levels of the dental hygienists were as follows: communication ability 3.34, critical thinking ability 3.41, creative problem-solving 3.40, and collaborative self-efficacy 3.27. Meanwhile the mean score for work ability level was 3.65. The predictive factors influencing work ability were communication ability and cooperative self-efficacy (p<0.001), and the sub-factors of critical thinking ability that affect work ability were sound conferences (p<0.01), intellectual fairness (p<0.05), intellectual enthusiasm (p<0.05), and self-confidence (p<0.001). Finally, the sub-factors of creative problem-solving ability that affect work ability were planning and execution (p<0.01) and performance evaluation (p<0.05).CONCLUSION: The current study showed that education programs covering the core competencies of dental hygienists, rather than the existing theoretical education program, should be developed and implemented to enhance 4C core competencies that affect work ability.
Busan ; Communication ; Congresses as Topic ; Dental Clinics ; Dental Hygienists ; Education ; Humans ; Problem Solving ; Thinking ; Ulsan

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Relationship of Oral Bacterial Load Over One Year of Smoking Cessation

Sunghyun KIM ; Min Seock SEO ; Soo Jeong HWANG

Journal of Dental Hygiene Science.2019;19(4):213-219. doi:10.17135/jdhs.2019.19.4.213

BACKGROUND: Smoking exerts an adverse effect on the periodontal tissue by reorganizing the ecosystem of oral microorganisms and is considered to be an important factor in the development of periodontal disease. Although cross-sectional studies on smokers and non-smokers have been attempted to investigate the microbial differences in periodontal oral cavity, only few studies have been conducted to investigate the changes in oral microorganisms during smoking cessation. The purpose of this study was to investigate the changes of bacteria in saliva and gingival crevicular fluid (GCF) over a period of one year among 11 smokers trying to quit smoking.METHODS: Eleven smokers trying to quit smoking visited the clinic at baseline, two weeks, two months, four months, six months, and 12 months to give saliva and GCF samples. The amounts of 16S rRNA, Porphyromonas gingivalis, Treponema denticola, Prevotella intermedia, Fusobacterium nucleatum subsp. nucleatum, Streptococcus mutans, and Streptococcus sobrinus in saliva and GCF were quantified using real-time polymerase chain reaction TaqMan probe assay. The results were analyzed by nonparametric statistical analysis using Friedman test and Spearman correlation coefficient.RESULTS: After cessation of smoking, the amounts of 16S rRNA corresponding to P. gingivalis, F. nucleatum, P. intermedia, and T. denticola in saliva decreased and then again increased significantly. The amount of F. nucleatum 16S rRNA in GCF decreased significantly after smoking cessation. Positive correlations were observed between 16S rRNA and F. nucleatum and between F. nucleatum and T. denticola in saliva and GCF.CONCLUSION: Even if the number of subjects in this study was small, we suggest that smoking cessation may reduce the total bacterial amount and F. nucleatum in GCF. However, the results regarding changes in the microbial ecosystem due to smoking or smoking cessation were inconsistent. Therefore, further in-depth studies need to be carried out.
Bacteria ; Bacterial Load ; Cross-Sectional Studies ; Ecosystem ; Fusobacterium nucleatum ; Gingival Crevicular Fluid ; Mouth ; Periodontal Diseases ; Porphyromonas gingivalis ; Prevotella intermedia ; Real-Time Polymerase Chain Reaction ; Saliva ; Smoke ; Smoking Cessation ; Smoking ; Streptococcus mutans ; Streptococcus sobrinus ; Treponema denticola

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