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pISSN : 2287-1705 / eISSN : 2288-2294

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2019, Vol.19, No.2

  • 1.

    Correlation analysis between elderly oral myofunction, oral microorganisms, and cognitive function

    Kim, Seol Hee | 2019, 19(2) | pp.161~172 | number of Cited : 0
    Abstract PDF
    Objectives: This study aimed to analyze the correlation between oral function, oral environment, and brain cognitive function in the elderly. Methods: The subjects were 60 users of senior community center and elderly day care center. The survey was conducted from November to December 2018. Subjects were assessed by oral examination and myofunction test. Oral myofunction was measured using IOPIR and Lip de CumR. Survey data were analyzed using the statistical programs of PASW Statistics ver. 18.0. Results: Tongue muscle strength and lips muscle strength was higher in males than in females. The tongue and lip strengths were higher in the <81 years old group than the ≥81 years old group. Functional tooth analysis showed that there was a ≥15 teeth group (40.91±7.36) and a <15 teeth group (32.52±7.14). Lip muscle strength analysis showed that the ≥15 teeth group (10.54±3.40) was higher than the <15 teeth group (8.20±2.41, p <0.05). Tongue muscle strength, lumbar muscle strength, and functional tooth number were lower in the elderly subjects with mild cognitive impairment. Cognitive function was significantly correlated with functional tooth number (r=0.386, p <0.001), tongue strength (r=0.478, p <0.001), and lip strength (r=0.281, p <0.05). Tongue strength was significantly correlated with lip strength (r=0.360, p <0.001) and functional tooth number (r=0.633, p <0.001). Lip strength was significantly correlated with functional tooth number (r=0.376, p <0.001). Conclusions: These results showed that age and functional tooth number influenced oral muscle strength and that the number of functional teeth and oral muscle strength were low in the elderly with mild cognitive impairment. Oral myofunction training and oral care program are suggested to improve the quality of life of the elderly.
  • 2.

    Evaluation of physical property and cytotoxicity of resin infiltrant based on a triethylene glycol dimethacrylate (TEGDMA)

    MIN JI-HYUN | 오지연 | Ki-Rim Kim | 2019, 19(2) | pp.173~181 | number of Cited : 0
    Abstract PDF
    Objectives: The resin infiltration technique is a promising alternative therapy for arresting the early dental caries. However, there are very few reports on the safety and biocompatibility of this technique. We evaluated various properties of resin infiltrant (RI) based on a triethylene glycol dimethacrylate (TEGDMA).The water sorption (Wsp) and water solubility (Wsl) was assessed. Additionally, the cytotoxicity of RI against both animal and human fibroblast cell lines was investigated. Methods: The RI of the Icon®, the first product developed for resin infiltration, is mainly composed of TEGDMA in the resin matrix. The Wsp and Wsl for the RI were measured in accordance with ISO 4049 specifications. Fourier-transform infrared spectroscopy (FTIR) was used for analyzing the polymerization before and after curing of RI. The cytotoxicity of RI against the mouse fibroblasts (L929) and human gingival fibroblasts (hTERT-hNOF) was evaluated using MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay and the data were analyzed using one-way analysis of variance. Results: Wsp and Wsl of the RI specimens were 53.37 μg/mm3 and 10.6 μg/mm3, respectively. FTIR analysis revealed a slightly higher degree of curing with longer irradiation time. The degree of conversion for RI was high (80.9%) after 40 seconds of light curing. There was a significant decrease in the viability of L929 and hTERThNOF cells at RI extraction solution concentrations above 50%, respectively, compared to that in the negative control ( p < 0.05). Conclusions: Even though the RI exhibited positive effect on the early prevention of dental caries, the clinicians should also consider the toxicity of RI on periodontal tissues.
  • 3.

    Current status of continuing education and related factors in dental hygienists

    한여정 | Han Mi Ah | Park, Jong and 3other persons | 2019, 19(2) | pp.183~194 | number of Cited : 3
    Abstract PDF
    Objectives: This study aimed to identify the factors related to the completion status of continuing education and to help develop professional ability by presenting improvement directions. Methods: A questionnaire survey involving 500 dental hygienists working at 155 dental clinics in Gwang-ju was conducted between June 19 and July 29, 2017. Descriptive analysis, chi-square tests, and t-tests were conducted using Statistical Package for Social Sciences Version 21.0 for Windows. Finally, to investigate the factors related to the completion of continuing education, logistic regression analysis was performed. Results: The odds ratio (OR) was higher in the group with more than 16 years of total work carrier (OR=3.40, 95% confidence interval (CI)=1.22–9.45) than that in the group with 1–5 years of work carrier. Groups receiving information from associations (OR=5.35, 95% CI=1.74–16.40), groups that directly search for information (OR=6.53, 95% CI=1.84–23.12), and groups receiving information from colleagues (OR=3.55, 95% CI=1.17–10.77) had higher ORs than groups receiving no information. The OR was higher in the group receiving cost support for participation (OR=2.20, 95% CI=1.06–4.55) than the group receiving no support. Regarding total education completion status in 2012–2014, groups that completed grades 1–7 (OR=2.51, 95% CI=1.35–4.64) and those that completed grade 8 or higher (OR=14.37, 95% CI=7.68–26.89) had higher ORs than groups who received no education. Conclusions: The rate of completion of continuing education can be increased by reviewing the course contents, publicity activities, and cost of continuing education.
  • 4.

    Dental hygienist's status and demand of continuing education contents

    Sun-Mi Lee | Lee Jung Hwa | 2019, 19(2) | pp.195~206 | number of Cited : 1
    Abstract PDF
    Objectives: The purpose of this study was to provide the basic data that can help the development and quality management of effective continuing education programs by analyzing the status and demand of continuing education contents for dental hygienists. Methods: The questionnaire had 30 questions, which included 5 questions on general characteristics, 4 on continuing education status, 3 on online continuing education, and 18 on desired continuing education. The survey was conducted for the members attending continuing education programs in 2018. Results: The mean age of the participants was 30.08 years, with an average career of 8.19 years. The continuing education was highly recognized, through the homepage of the association (52.5%); as speakers for continuing education, dental hygienists in the field of specialization were preferred (45.8%). Additionally, the preferred frequency of programs was twice a year (45.7%). For promoting continuing education, the use of mobile phone letter was preferred (65.8%). Moreover, 92.9% of respondents were aware of online continuing education, 49.9% had experience in online continuing education, and 59.9% said that they will actively use smart devices in the future. The requirement for the contents of continuing education was the highest at 4.34 points for health insurance cost and the lowest at 2.75 points for liberal arts classes. Conclusions: To provide effective continuing education, it is necessary to develop a customized continuing education program considering various variables, such as career, work place, and career break experience, thus reflecting the systematic requirement of surveys according to each characteristic.
  • 5.

    A study on the dental hygienists’ legal scope of clinical practice

    정주희 | So Jung Mun | Sung Suk Bae and 2other persons | 2019, 19(2) | pp.207~219 | number of Cited : 2
    Abstract PDF
    Objectives: This study investigates the dental hygienist’s main duties in clinical dental practice and examine whether dental hygienists can safely perform each duty by referring to the educational contents of dental hygiene departments and national examinations of dental hygienists. Methods: A questionnaire on the main duties of dental hygienists was administered to 477 clinical dental hygienists working at dental clinics and hospitals, general dental hospitals, and university dental hospitals in Seoul, Gyeonggi-do, and Incheon. We divide the dental hygienists’ clinical dental hygiene practice and clinical dental assist and analyze the legal scope of practice, university educational contents, and national examination contents. Statistical analysis was performed through frequency analysis, and multi-frequency data were analyzed using Excel 2013. Results: All 48 items (except 2 items of 29 dental hygiene practice and 21 assist practice items) surveyed were covered in the National Examination for Dental Hygienists and included in the Dental Hygiene Education Learning Objective. The multi-frequency clinical dental practice of eight items of clinical dental hygiene practice and two assist practice items were within the legal scope of the dental hygienist’s role. Conclusions: Further discussions are needed to redefine the legal scope of the role of the dental hygienist.
  • 6.

    Comparison of job satisfaction, turnover intention, and job performance by dental hygienists’ clinical assistance and preventive work

    Seong, Mi Gyung | Yu-Rin Kim | 2019, 19(2) | pp.221~229 | number of Cited : 3
    Abstract PDF
    Objectives: The purpose of this study was to confirm job satisfaction, job performance, and turnover intention according to dental hygienists’ clinical assistance and preventive work. Methods: The collected data (N=380) were analyzed with independent t-tests and Pearson correlations using SPSS Statistics ver. 21.0 (IBM Co., Armonk, NY, USA). Results: The results indicated that the higher the overall job satisfaction of the dental hygienist, the higher their job performance and the lower their turnover intention ( p <0.05). The results of the comparison of job satisfaction showed that preventive work was higher than dental hygienists’ clinical assistance in all items except “I was pleased with work” ( p <0.05). The results of the comparison of job performance showed that preventive work was higher than dental hygienists’ clinical assistance in all items except “I have never complained, even if things go wrong” ( p <0.05). The results of the comparison of turnover intention showed that clinical assistance was higher than dental hygienists’ preventive work in all items ( p <0.05). Conclusions: Our results demonstrate that job satisfaction, turnover intentions, and job performance have positive effects for preventive work. Therefore, dental clinics need to improve the actual environment so that dental hygienists can focus on preventive work.
  • 7.

    Factors influencing job satisfaction of clinical dental hygienists in schoolwork

    Min Hee-Hong | Mi-Hyun Choi | Mi-Hae Yun | 2019, 19(2) | pp.231~239 | number of Cited : 5
    Abstract PDF
    Objectives: This study was conducted to understand the influencing factors of job satisfaction of clinical dental hygienists in schoolwork, and use the basic data to enhance their job satisfaction. Methods: A self-reported questionnaire was filled out by 210 dental clinic hygienists from June 10 to August 30 of 2018. Data were analyzed using SPSS 22.0. Independent t-test, one-way ANOVA, Scheffe’s post-hoc test, and Pearson correlation coefficient were reviewed, and a multiple regression analysis was conducted. Results: The scores of subjects' professional selfconcept, self-esteem, job stress, and job satisfaction were 3.37, 3.80, 2.79, and 3.37, respectively. The influencing factors of job satisfaction of clinical dental hygienists in schoolwork included marital status, support in workplace, professional self-concept, and job stress, with 41.6% of the explanatory power. Conclusions: The stronger the professional self-concept, the lower the jobstress and higher the job satisfaction. The job satisfaction was also higher in the group in which the subjects were married and getting support in the workplace compared to the other group with no support in the workplace. Therefore, support systems and institutional support are required for clinical dental hygienists to be continuously educated in the workplace.
  • 8.

    The effects of verbal violence on stress among dental hygienists and mediating effects of positive psychological capital

    PARKJUNGHYUN | Jang Kyeung Ae | 2019, 19(2) | pp.241~249 | number of Cited : 3
    Abstract PDF
    Objectives: This study aimed to investigate the effects of verbal violence experience on stress and positive psychological capital as well as the mediating effects of positive psychological capital. Methods: A survey was conducted with dental hygienists working at university hospitals, general hospitals, and dental hospitals and clinics in Busan, Gyeongnam, and Ulsan areas.Of the 230 questionnaires distributed, 206 were used in the analysis after excluding 24 completed questionnaires that had errors or missing answers. Results: As a result of identifying the relationships between verbal violence damage, positive psychological capital, and stress, verbal violence damage was negatively correlated with positive psychological capital (r=-0.28, p<0.001 ) and positively correlated with stress (r=0.40, p <0.001). Positive psychological capital had a negative correlation with stress ( r=-0.25, p<0.001 ). As a result of verifying the mediating effects of positive psychological capital on the relationship between verbal violence damage and stress among dental hygienists, it was found that verbal violence had a significant effect on stress and positive psychological capital in the first and second stages. In the third stage, the effect of positive psychological capital on stress was significant, showing that there was a mediating effect. Conclusions: Therefore, sound work environments should aim to reduce verbal violence while increasing support systems to reduce negative emotional and psychological states.
  • 9.

    Factors affecting radiation safety management practice of radiation workers in dental medical institutions

    Lee Eun Gyeong | Jang Gye Won | Kweon Dae Cheol and 1other persons | 2019, 19(2) | pp.251~263 | number of Cited : 1
    Abstract PDF
    Objectives: To establish foundations for reinforcing radiation safety management in dental facilities. Methods: This study investigated the status of radiation safety management among radiation workers in dental facilities nationwide for a period of six months from July to December in 2018 and analyzed the factors that affect their compliance with radiation safety measures. Results: Compliance with safety measures was higher in the Honam region ( p <0.01) and Yeongnam region ( p <0.01), in university hospitals and general hospitals ( p <0.05), along with an increasing perception of the importance of safety management ( p <0.001). Conclusions: It is important to strengthen education about radiation safety management, develop a radiation safety guideline that could be reasonably applied to dental institutions, and implement relevant regulations or legal grounds to promote compliance with these measures.
  • 10.

    Trends in the prevalence of oral health behaviors among Korean adolescents: using 2005-2017 Korea Youth Risk Behavior Webbased Survey (KYRBS)

    PARK SU KYUNG | Young-Suk Kim | 이민영 and 3other persons | 2019, 19(2) | pp.265~275 | number of Cited : 2
    Abstract PDF
    Objectives: The aim of this study was to investigate trends of oral health behaviors in Korean adolescents. Methods: From the 2005 to 2017 Korea Youth Risk Behavior web-based Survey (KYRBS) Secondary Data (study to 748,461). Independent variables were the year, gender, grade, and living area. Dependent variables were the rate of tooth-brushing after lunch, scaling, use of sealant, and oral health education within 1 year. Chi-squire tests were used to estimate the rate of oral health behaviors and trends. In addition, multiple logistic regression analysis was used to estimate the association between socio-economic characteristics and oral health behaviors. The analyses were conducted using IBM SPSS statistics 21 (version 21.0, IBM Corporation, New York, NY, USA). Results: The rate of tooth-brushing after lunch and use of sealant have significantly increased every year. Oral health behaviors were significantly associated with socio-economic characteristics. The rate of oral health education was higher among males than females, which was in contrast to other oral health behaviors. The scores for tooth-brushing after lunch, use of sealant, and scaling in females were 2.33 (95% CI; 2.27-2.40), 1.31 (95% CI; 1.29-1.33), and 1.20 (95% CI; 1.18-1.22), which were higher than those in males. The score for use of sealant in the highest household economy group was 1.13 (95% CI; 1.10-1.17), which was higher than the lowest economy group. Conclusions: We found positive trends of oral health behaviors in Korean adolescents.
  • 11.

    Internet use and oral health behaviors in Korean adolescents

    Young-Suk Kim | 2019, 19(2) | pp.277~286 | number of Cited : 1
    Abstract PDF
    Objectives: The purpose of this study was to evaluate the association between Internet use and oral health behaviors in Korean adolescents. Methods: This study used the 13th Korea Youth Risk Behavior Web-based Survey (2017) to find an association between Internet use and oral health behaviors. The total number of study subjects was 54,603. A chi-square test and multiple logistic regression analyses were used to estimate the association between Internet use and oral health behaviors. Results: Internet use was significantly increased among female, higher school grade, lower school records, and lower economic status participants ( p <0.001). The rate of frequency of toothbrushing more than three times daily and use of oral hygiene devices was increased among female, higher school record, and higher economic status participants significantly ( p <0.001). Oral symptoms experienced were significantly increased among female, higher school grade, lower school records, and lower economic status participants ( p <0.001). The rate of the toothbrushing more than three times daily and toothbrushing after lunch groups was the highest in the group with less than one hour of Internet use, but the rate of oral symptoms experienced was the highest in the group with over five hours of Internet use. The risk of toothbrushing less than twice daily was 1.61 times higher in the group with over five hours of Internet use, and the risk of not brushing after lunch was significantly higher (1.52 times) in the over five hours group. The risk of not using oral hygiene devices was the highest (1.22 times) in the less than five hours group, and the risk of oral symptoms experiences was 1.40 times higher in the more than five hours group. Conclusions: Internet use was related to oral health behaviors in adolescents. Appropriate Internet use and awareness of oral health care are needed among adolescents.
  • 12.

    A comparative study of subjective oral symptom experiences according to gender in adolescents of multi-cultural families

    park ji young | Jung Gi Ok | 2019, 19(2) | pp.287~295 | number of Cited : 1
    Abstract PDF
    Objectives: The purpose of this study was to investigate the factors affecting subjective oral symptoms according to the gender of youth from multi-cultural families in Korea using data from the 14th (2018) Korean Youth Health Behavior Survey. Methods: The independent variables used in this study consisted of gender and sweet drink intake. The dependent variable was experience of subjective oral symptoms. Compensation variables consisted of general characteristics of school type, academic performance, economic status, drinking status, smoking status, and number of tooth brushings day before. The subjects of the study were 835 children of multi-cultural families whose parents were foreigners. All statistical analyses were performed by complex samples cross-tabulation analysis and complex samples logistic regression analysis. Statistical analysis was performed using the PASW statistical package 21.0 (Statistical Packages for Social Science Inc., Chicago, IL, USA). A significance level of 0.05 was used for statistical significance. Results: The composite sample logistic regression analysis showed that there was a statistically significant difference between gender and intake of sweet drinks in experience of subjective oral symptoms. Conclusions: These results suggest that factors influence subjective oral symptoms in Korean multi-cultural adolescents. Therefore, I hope that they will be used as basic data for the introduction and development of a customized oral health education program for improving oral health of multi-cultural adolescents.
  • 13.

    A study on stress levels and oral health symptoms of adolescents in multicultural families

    남궁은정 | Hee-Kyoung Kim | KIM SUN-IL | 2019, 19(2) | pp.297~306 | number of Cited : 3
    Abstract PDF
    Objectives: The purpose of this study was to investigate the relationship between stress and oral health symptoms in adolescents in multicultural families. Methods: The data from the 10th Korea Youth Risk Behavior Web-based Survey (KYRBWS) were analyzed using PASW Statistics 18.0 (SPSS Inc., Chicago, IL, USA). A total of 795 adolescents, whose mother or father's home country is not Korea, were selected as the final analysis subjects. Results: There was a correlation between the subject's stress level and oral health symptoms. Toothache was significantly increased 2.474 times ( p <0.001) compared to lower stress levels. Gum pain and halitosis were significantly increased by 2.394 times and 1.820 times, respectively, compared with those who had low stress (0.001, 0.008). Conclusions: The results suggest that stress experienced by adolescents in multicultural families affects oral health symptoms. Therefore, it is necessary to identify the stress factors and levels in adolescents belonging to multicultural families whose physical and emotional changes are evident and develop a customized program considering their characteristics.
  • 14.

    Comparison of surface characterization according to surface treatment of composite resin inlay

    Myung-Jin Lee | Yu-Ri Choi | Kang Min Kyung | 2019, 19(2) | pp.307~315 | number of Cited : 1
    Abstract PDF
    Objectives: The aim of this study was to investigate the characterization of composite resin inlay surface with silane and non-thermal atmospheric pressure plasma treatment. Methods: Composite resin inlay was used as a specimen, which was treated by sandblasting + silane and sandblasting + plasma. The untreated specimens were assigned to the control group. Specimens were analyzed for surface roughness, color change, and chemical composition. Statistical analyses were performed using one-way ANOVA test ( p <0.05). Results: The present findings showed that the roughness and color changes of the plasma-treated surface were significantly lower than those of the silane-treated surface. In addition, a change in the chemical composition was observed on the plasma-treated surface. Conclusions: Based on the results, non-thermal atmospheric pressure plasma could be a potential tool for the cementation of composite resin inlay.
  • 15.

    Relationship between occlusion analysis using the T-scan III® system and oral behavior checklist according to temporomandibular joint disorder in female college students

    Sun-Mi Lee | 김창희 | Mi-Kyoung Jun | 2019, 19(2) | pp.317~327 | number of Cited : 1
    Abstract PDF
    Objectives: This study aimed to evaluate the effects of occlusion patterns using the T-scan III® system and oral parafunctional behaviors on temporomandibular joint disorder (TMD) in female college students. Methods: A questionnaire survey assessed TMD symptoms and oral behavioral checklist (OBC) scores in 120 female college students in their early twenties. Occlusion was evaluated using the T-scan III® system. Logistic regression analysis was performed to investigate the relationship between occlusion and OBC scores based on patients’ symptoms of TMD and to determine whether OBC scores were a predictor of TMD. Results: A total of 101 participants with an average age of 22 (±2.17) years were included in the analysis. The reported symptoms of TMD were categorized as moderate (28.8%), slight (27.7%), severe (25.7%), and asymptomatic (17.8%). Occlusion was analyzed using the T-scan III®system,andthemeanocclusi ontimewas0.42(±0.5) seconds. The results of logistic regression analysis showed that the group that would‘clench or grind teeth’ during sleep showed an odds ratio for TMD that was 8.9 times higher than that in the group without this behavior. The group that would‘hold, tighten, or tense muscles without clenching’ while awake showed an odds ratio for TMD that was 21.3 times higher than that in the group without this behavior. Conclusions: We confirmed that oral parafunctional behavior affects TMD. Therefore, we would like to continue studying the diagnosis and treatment of TMD by evaluating occlusion patterns and related OBC scores.