• Journal of the Korean Academy of Clinical Electrophysiology
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• v.8 no.2
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• pp.19-24
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• 2010

Purpose : This study aims to examine the influences of galvanic vestibular stimulation on autonomic reaction of normal adults. Methods : Participants in this research totaled 28 (14 men and 14 women). Galvanic vestibular stimulation was conducted with a binaural electrode configuration for 60 sec. Galvanic vestibular stimulation measurements were conducted with the subjects in a prone position. Measured items included skin conductance, blood flow, pulse rate, and respiratory rate. Measurements were repeated for a total of five times, before application, during application, after application, 5 minutes after application and 10 minutes after application. Results : Skin conductance reaction showed statistically significant differences in changes depending on time after galvanic vestibular stimulation and there were statistically differences in changes of blood flow, pulse rate and respiratory rate after galvanic vestibular stimulation. Conclusion : Blood flow, pulse rate and respiratory rate of autonomic reactions were not influenced by galvanic vestibular stimulation, but skin conductance reaction was influenced by it and it was found that it was reduced during and after stimulation rather than before stimulation. Consequently, it was considered that galvanic vestibular stimulation affected the autonomic reaction.

• Journal of the Korean Electrochemical Society
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• v.5 no.4
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• pp.226-231
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• 2002

Power densities produced by the permeation of methanol through membranes were directly measured by inserting the membrane in front of anode in a membrane-electrode-assembly of a direct methanol fuel cell (DMFC). The power density was closely related to the loss of power in the DMFC and was strongly affected by temperature. As the cell temperature was increased, the power density resulting from methanol crossover was increased. The increase in methanol crossover had be attributed to diffusion caused or affected by temperature. Methanol crossover a major effect on the performance of a DMFC at a relatively low temperature with $26\%\;loss\;at\;30^{\circ}C$. In order to reduce methanol crossover, a conventional Nafion membrane was modified by the incorporation of Pt or Pd. The reduction in methanol crossover was investigated in these modified membranes by our cell performance measurement. Pt and Pd particles incorporated in the Nafion membranes block methanol pathway and prevent methanol transport through the membranes, which was proved by combining with liquid chromatography.

• Journal of Korean society of Dental Hygiene
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• v.20 no.3
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• pp.369-378
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• 2020

Objectives: The purpose of this study is to examine the correlation between the critical thinking disposition of dental hygienists and the variables associated with clinical decision making and job performance to analyze factors affecting job performance. Methods: A questionnaire survey was administered to 166 dental hygienists from June 24 to August 8, 2019. We analyzed results with t-test, Mann-Whitney U test, ANOVA, Pearson's correlation analysis and a multiple regression analysis using the SPSS Windows version 23.0(SPSS Inc. IL, USA). Results: Critical thinking disposition was the highest for open-mindedness and clinical decision making ranked highest for canvassing of objectives and values. Job performance ranked highest in terms of assist with dental treatment. Factors affecting dental hygienists' job performance were clinical decision making and critical thinking disposition(p<0.001, adj. R² =31.4). Conclusions: It is expected that this study will provide basic data for the development of programs to enhance the job performance of dental hygienists. Furthermore, it is necessary to actively support plans such as conducting seminars at dental institutions and providing educational participation opportunities.

• Journal of Korean society of Dental Hygiene
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• v.21 no.2
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• pp.159-170
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• 2021

Objectives: This study aimed to investigate factors for retention intention among long-term employed dental hygienists and to provide basic data for improving the long-term service (working) environment. Methods: A total of 202 dental hygienists with more than five years' work experience at dental hospitals and clinics located in Seoul, Gwangju, and Jeonnam Province, South Korea, were surveyed. The data were analyzed for each factor using exploratory factor analysis, and differences according to the general characteristics of the participants were analyzed using an independent sample t-test, one-way ANOVA and a hierarchical multiple regression analysis. Results: At the current workplace, a better working environment, and higher job satisfaction were associated with higher retention intention. However, lower professionalism in dental hygiene as a subdomain of the professional self-concept domain was associated with higher retention intention. Conclusions: To increase retention intention among dental hygienists, it is necessary to improve the working environment in which dental hygienists can perform professional roles and seek ways to establish their identity as professionals in dental healthcare settings.

• Journal of Korean society of Dental Hygiene
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• v.19 no.5
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• pp.677-688
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• 2019

Objectives: The purpose of this study was to examine the perception of dental hospital accreditation and the awareness and practice of infection control in dental hygienists. Methods: A self-reported questionnaire was completed by 238 dental hygienists working at dental hospitals in Gwangju Jeonnam and analyzed from October 24, 2016 to September 22, 2017. Data were analyzed with the independent t-test, one-way analysis of variance, Pearson's correlation analysis, and multiple regression analysis using the Statistical Package for the Social Sciences software, version 21.0. Results: Compared to non-accredited dental hospitals, all three variables were high for accredited dental hospitals. In accredited dental hospitals, healthcare accreditation expectancy effects correlated to awareness (r=0.407) and practice (r=0.533) of infection control, and awareness of infection control correlated to its practice (r=0.725). In non-accredited dental hospitals, healthcare accreditation expectancy effects correlated to awareness of infection control (r=0.239), and awareness of infection control correlated to its practice (r=0.481). Accredited dental hospitals showed healthcare accreditation expectancy effects (${\beta}=0.258$) and awareness of infection control (${\beta}=0.556$), and non-accredited dental hospitals were influenced by the number of employees (${\beta}=0.567$) and awareness of infection control (${\beta}=0.376$). Conclusions: It is necessary to develop efficient and systematic infection control programs to improve the awareness and practice of infection control in dental hygienists and patient's safety in the clinical field.

• Journal of Korean society of Dental Hygiene
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• v.21 no.4
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• pp.455-465
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• 2021

Objectives: This study was conducted to investigate dental hygienists' knowledge of smoking, attitudes toward tobacco cessation, and tobacco cessation education activities, which will serve as fundamental data for developing an effective tobacco cessation education program for dental hygienists. Methods: From 2020-08-17 to 2020-09-05, 184 dental hygienists working at dental clinics and hospitals in Gwangju and Jeollanam-do were surveyed. We performed t-tests, ANOVA, Pearson's correlation analysis, and multiple regression analyses. Results: Dental hygienists' smoking-related knowledge, expert attitudes toward tobacco cessation, and tobacco cessation education activities were all high in tobacco cessation education (p<0.05). According to the analysis of the dental hygienists' knowledge of smoking, attitude toward smoking, and correlation of tobacco cessation education activities, there was a significant amount of correlation (p<0.01). According to the analysis of factors affecting dental hygienists' tobacco cessation education activities, expert attitudes towards tobacco cessation (𝛽=0.434, p<0.001), tobacco cessation materials (𝛽=0.160, p=0.009), experience in tobacco cessation education while attending school (𝛽=0.152, p=0.010), and attitudes toward tobacco cessation (p<0.05) were statistically significant. Conclusions: The results of this study are utilized as fundamental data to develop an effective tobacco cessation education program, factoring in dental hygienists' attitudes toward tobacco cessation.

• Journal of Korean society of Dental Hygiene
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• v.22 no.3
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• pp.217-224
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• 2022

Objectives: This study aimed to establish the basic data for the performance of patient-centered care, perception of core competencies, and self-development of dental hygienists by verifying the effects of information literacy on the communication ability of dental hygienists, and the mediating effects of job crafting. Methods: Collected and analyzed data by conducting a survey targeting total 222 dental hygienists working for dental hospitals/clinics located in Seoul and Gyeonggi region. Verify the mediating effects of job crafting on the effects of information literacy on the communication ability, this study conducted the correlation analysis and simple regression analysis and multiple regression analysis. Results: In the effects of information literacy on the communication ability of dental hygienists, the cognitive crafting of job crafting (β=0.209, p<0.001) and relational crafting of job crafting (β=0.318, p<0.001) showed the partially mediating effects. Conclusions: In order to increase the educational accessibility for dental hygienists to perceive the importance of information literacy and communication ability, to improve the expertise as healthcare personnel who perform the patient-centered care by developing it, and also to develop the information literacy and job crafting, it would be necessary to develop various educational programs and contents.

• Journal of Korean society of Dental Hygiene
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• v.22 no.3
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• pp.199-207
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• 2022

Objectives: The objectives of this study were to find the influential factors of dental hygienists' work environment and level of perception of rights on their retention intention, and to provide basic data for protecting their rights and interests and improving their employment rate. Methods: From June 6 to July 24, 2021, a questionnaire survey was conducted among 214 dental hygienists via an online link. After questionnaire collection, IBM SPSS program (ver. 21.0; IBM Corp., Armonk, NY, USA) was used to conduct frequency analysis, t-test, one-way ANOVA and multiple regression analysis. Results: The significant and positive influential factors of dental hygienists' retention intention were married individuals (p=0.022), fewer working hours (p<0.001, p=0.007), good work environment (p=0.002), higher wages (p<0.001, p<0.001), higher education (p=0.032), and perception of rights in a mid-level (p=0.038). Conclusions: It is necessary to consider wages and welfare equivalent to dental hygienists' work intensity and workload. By regularly educating dental hygienists to increase their perception of rights, expanding an opportunity of participation, and improving their work environment, it will be possible to increase their retention intention and efficiently establish manpower in dental clinics.

• Journal of Korean society of Dental Hygiene
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• v.22 no.3
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• pp.209-216
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• 2022

Objectives: This study was conducted to provide basic data for developing a professionalism improvement program for dental hygienists in preparation for the 4th industrial revolution era. Methods: A survey was conducted in 216 dental hygienists from May 3 to June 14, 2021, and statistical processing was performed using frequency analysis, t-test, one-way ANOVA, Pearson's correlation analysis, and multiple regression analysis. Results: Communication competence were at higher levels for dental hospital workers (3.98) and university/graduate school (3.94); professionalism was at higher levels for dental hospital workers (3.64), university/graduate school (3.55), and 7 or more dental hygienists at workplace (3.53); self leadership was at higher levels for dental hospital workers (4.11), university/graduate school (4.04), and intermediary manager (4.00); job performance was at higher levels for 11 years or more (4.08), university/graduate school (4.04), intermediary manager (4.04), and 30-34 years of age (4.04). There was positive correlation among communication competence, professionalism, self-leadership, and job performance. Factors affecting job performance were self-leadership (β=0.461), communication competence (β=0.353), 30-34 years of age (β=0.141), and total experience of 8-10 years (β=-0.149). Conclusions: In the era of the 4th industrial revolution, it is necessary to develop a program to strengthen the professional competence of dental hygienists.

• Journal of Korean society of Dental Hygiene
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• v.22 no.3
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• pp.161-170
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• 2022

Objectives: This study aims to conduct in-depth research on the effect of non-surgical periodontal therapy (NSPT) with the application of a comprehensive dental hygiene care (CDHC) process, and provide basic data for the wide application of CDHC. Methods: From May 8, 2021 to September 24, 2021, mixed-methods research was conducted in 36 patients with periodontal diseases. A paired samples t-test was used to analyze the quantitative research data using IBM SPSS program(ver. 22.0; IBM Corp., Armonk, NY, USA) and qualitative research data were analyzed using the thematic analysis method. Results: With NSPT applying the CDHC process, the perception of periodontal health and self-efficacy of periodontal healthcare were increased (p<0.001). Presence of gingivitis, probing pocket depth, bleeding on probing rate, presence of subgingival calculus, and dental plaque index were reduced (p<0.001). Based on 195 meaningful statements, 26 concepts, 12 sub-themes, and 5 themes , , , and were drawn. Conclusions: The perception of periodontal health and the self-efficacy were improved, and substantial change in the clinical index. The CDHC application allowed the study participants to perceive the importance of dental care and professionalism of dental hygienists.