• Journal of the Korean Association of Oral and Maxillofacial Surgeons
• /
• v.44 no.2
• /
• pp.59-65
• /
• 2018

Objectives: This study aimed to optimize the thread depth and pitch of a recently designed dental implant to provide uniform stress distribution by means of a response surface optimization method available in finite element (FE) software. The sensitivity of simulation to different mechanical parameters was also evaluated. Materials and Methods: A three-dimensional model of a tapered dental implant with micro-threads in the upper area and V-shaped threads in the rest of the body was modeled and analyzed using finite element analysis (FEA). An axial load of 100 N was applied to the top of the implants. The model was optimized for thread depth and pitch to determine the optimal stress distribution. In this analysis, micro-threads had 0.25 to 0.3 mm depth and 0.27 to 0.33 mm pitch, and V-shaped threads had 0.405 to 0.495 mm depth and 0.66 to 0.8 mm pitch. Results: The optimized depth and pitch were 0.307 and 0.286 mm for micro-threads and 0.405 and 0.808 mm for V-shaped threads, respectively. In this design, the most effective parameters on stress distribution were the depth and pitch of the micro-threads based on sensitivity analysis results. Conclusion: Based on the results of this study, the optimal implant design has micro-threads with 0.307 and 0.286 mm depth and pitch, respectively, in the upper area and V-shaped threads with 0.405 and 0.808 mm depth and pitch in the rest of the body. These results indicate that micro-thread parameters have a greater effect on stress and strain values.

• Journal of dental hygiene science
• /
• v.17 no.5
• /
• pp.439-446
• /
• 2017

The purpose of this study was to investigate the effect of empathic ability and campus life stress on the stress coping behaviors among 395 dental hygiene students. The analysis was performed using PASW Statistics ver. 18.0, and the following conclusions were obtained. The empathic concern factor was the highest in the subscale of empathic ability (3.60). The interpersonal relationship stress was 1.65 and the task-related stress was 2.72. The stress coping behaviors were the highest among the sub-domains, with 3.69 for wishful thinking. The differences of stress coping behaviors according to general characteristics were as follows. The lower the age and grade, the higher the problem-focused coping; when they were religious there was a high pursuit of seeking social support. When they were satisfied with their economic level, wishful thinking was high. There was a low negative correlation between empathic concern and interpersonal relationship stress in campus life (p<0.01). There was a positive correlation between personal distress and task-related stress (p<0.001). The relationship between empathic ability and stress coping behaviors was most associated with personal distress and wishful thinking. Among the sub-domains of stress coping behaviors, factors that have a common impact on personal distress and seeking social support are viewpoint acceptance. Factors supporting emotional focus and wishful thinking were task-related stress. Dental hygiene students are not able to completely eliminate the stress that they are actually under. However, as the research results show, it is necessary to use stress coping techniques to cope effectively with individual tendencies and situations, and to improve the ability to sympathize with another individual.

• Journal of Korean society of Dental Hygiene
• /
• v.14 no.5
• /
• pp.659-665
• /
• 2014

Objectives : This study aimed to determine the effects of stress coping type on self-esteem and satisfaction with life in dental hygiene students. In particular, an attempt is made to determine the effects of sub-factors of stress coping type on self-esteem and satisfaction with life, get a better understanding of self-esteem and satisfaction with life for dental hygiene students, and provide basic data in developing a program that can identify, prevent, and control the problems with stress for dental hygiene students. Methods : This is descriptive correlation research to determine the relations between self-esteem and stress coping type in dental hygiene students. 212 dental hygiene students at colleges in Ulsan Metropolitan City were asked to complete a self-administered questionnaire from June 10 to 20, 2013; then, 209 copies were used in analysis, with the exception of 3 copies which were excluded from recording. Results : Self-esteem and satisfaction with life were positively affected by active stress coping but were negatively affected by passive stress coping. As for such sub-factors of stress coping type as problem-focused coping, pursuit of social support, emotional relief coping, and hopeful thinking, the sub-factors of active coping type also positively affected self-esteem and satisfaction with life. Self-esteem interacted with the sub-factors of stress coping type and satisfaction with life. Conclusions : Since stress coping type was found to be a factor affecting self-esteem and satisfaction with life for students, the results of this study are expected to be used as basic data in developing a program that can help them cope actively with stress.

• The Journal of Korean Society for School & Community Health Education
• /
• v.20 no.3
• /
• pp.43-52
• /
• 2019

Objectives: This study aims to understand the effects of job stress and emotional labor on perceptive health status of dental hygienist's. And provide basic data by for establishing the plan for the effective management of job stress and emotional labor and the promotion of health. Methods: Self-evaluation questionnaires were surveyed for 441 dental hygienist's who agreed to participate in the survey, using questionnaires used in the preceding study were modified and complemented. We analyzed the data with frequency analysis, descriptive statistics, t-test, chi-square test와 ANOVA, Spearman correlation coefficient by using IBM SPSS Statistics 21.0 (IBM Co., Armonk, NY, USA). The significance level for significance was set at 0.05. Results: health status were job stress, emotional labor significant negative correlation. The factors having significant effects on health problem were physical health status, the job culture of job stress, lack of job autonomy, organizational instability, and workplace culture. In addition, social health status was affected by emotional expressionism, relationship conflict, organizational instability, organizational system, and workplace culture. Conclusion: Recognizing the importance of the management of job stress and emotional labor in the working environment to dental clinic and hospital managers and managerial dental hygienists, a dental hygienist health promotion intervention program is needed to mitigate and cope with job stress and emotional labor.

• Journal of Korean society of Dental Hygiene
• /
• v.17 no.3
• /
• pp.449-463
• /
• 2017

Objectives: The objective of this study was to identify the relationship between emotional labor and occupational stress of the dental hygienists, and the effects of emotional labor on their occupational stress and health problems including depression, anxiety and sleep. Methods: The survey was conducted using the questionnaires about dental hygienists' working in medical institutions in Busan, Gyeongsangnam-do from August 19th and October 7th, 2016. Total of 225 participants were selected for data analyses. Frequency analysis, t-test, ANOVA, Pearson's correlation coefficient analysis, and regression analysis were conducted using SPSS Windows ver. 21.0 program(SPSS Inc., Chicago, IL. USA). Results: The analysis of the factors affecting emotional labor, occupational stress, anxiety, and sleep by participants' characteristics showed that those with higher education level, work position and annual salary had higher emotional labor. In addition, participants who worked 5 days every other week and were responsible for patient consultation had higher emotional labor. The analysis of correlations among emotional labor occupational stress, anxiety, and sleep showed positive correlations between emotional experience and emotional expression, occupational stress and emotional expression, and anxiety and emotional expression. On the other hand, negative correlation was found between anxiety and emotional experience. Regression analysis was conducted to examine the effect of emotional labor on job stress. Emotional labor was a factor affecting job stress and anxiety. Conclusions: In order to improve emotional control and vulnerability to stress among dental hygienists, intra-organizational training opportunities and mental health care strategies are needed. Additional broad-based studies are required to identify the factors affecting the occupational stress and emotional labor and to develop relevant intervention measures.

• Journal of Korean society of Dental Hygiene
• /
• v.17 no.4
• /
• pp.589-600
• /
• 2017

Objectives: This study aims to prove that stress directly or indirectly affects the jaw joint disorders and provide basic data for developing oral health promotion program. Methods: The study was conducted by distributing a questionnaire survey to more than 350 people from December 30, 2016 to January 7, 2017. Among them, 336 copies were collected and 314 copies were utilized eventually, except Section 314, for the final analysis. Regression analysis was performed to investigate the factors affecting temporomandibular joint disorders. Results: As a result, academic achievement and stress were found to affect the temporomandibular joint disorders. The higher the level of education and stress, the higher the subjective symptoms of jaw joint disorder. Conclusions: Because stress affects temporomandibular joint disorders, it is necessary to find out the cause of stress not only for professional treatment but also for solution of temporomandibular disorder. Thus, stress level must be conisdred as influential factors in developing a jaw joint disease prevention program.

• Journal of Korean society of Dental Hygiene
• /
• v.16 no.3
• /
• pp.435-446
• /
• 2016

Objectives: The purpose of the this study is to investigate parenting stress of married dental hygienists having preschool and school aged children. Methods: A self-reported questionnaire was completed by 242 married dental hygienists from September to December, 2015 via e-mail and ordinary mail. The questionnaire consisted of demographics, job-related characteristics, family life satisfaction, and parenting stress. The data were analyzed using Stata 13.0 program. Results: As for job-related characteristics, 36.6% of the subjects answered 'not possible' in work hour flexibility. The reasons why family-work balance is difficult were 'parenting and education(58.7%)' and 'burden of family-work balance(32.4%)'. Family life satisfaction was 3.03, and parenting stress was 2.41. Parenting stress gets higher if their children are younger, monthly income is lower, and mother/father's age are lower. And parenting stress becomes higher if their career as dental hygienists is less, they are contract worker, and frequency to change jobs is higher. Concerning the reason why work-family balance is difficult, parenting stress is found to be high when they choose 'parenting and education', 'burdens of work-family balance', and 'relationship in workplace'. Family life satisfaction reduced parenting stress. According to the results of multiple linear regression analysis, frequency to change job influences parenting stress. Conclusions: Parenting stress increases turnover and career interruption of married dental hygienists. It is hard to improve work environment without policy support. It will be necessary to establish policy for employed mothers and create a work atmosphere where the policy can be utilized without difficulty.

• Journal of Korean society of Dental Hygiene
• /
• v.18 no.1
• /
• pp.43-53
• /
• 2018

Objectives: The aims of this study were to analyze the job stress of clinical hygienists according to their positional system and to confirm its relevance. Methods: Seven hundred seventy six clinical dental hygienists participated in this survey. The questionnaire items consisted of general characteristics, working environment, and job stress. The data analysis was performed using IBM SPSS statistics ver.23.0 software. Results: Among the job stresses, the stress on the job demands was the highest with 63.4 points, and the stress on interpersonal conflict was the lowest with 34.6 points. The total score of job stress was the highest in the 26-30 year-old age group, and major stress factors in this group were job insecurity, organizational system, and lack of reward. Team members were more stressful about insufficient job control, organizational system, and lack of reward than team managers, while team managers were more likely to score interpersonal conflict. The dental hygienists in the hospitals that did not have the positional system got more stressed in the insufficient job control, organizational system, and lack of reward area. Conclusions: The presence of positional system was related to job demand, insufficient job control, organizational system, and lack of reward. Structural efforts such as establishing a proper positional system in dental clinics will be needed to control job stress in the clinical dental hygienists.

• Journal of Korean society of Dental Hygiene
• /
• v.13 no.5
• /
• pp.827-833
• /
• 2013

Objectives : The purpose of the study is to investigate the relationship between self-leadership in clinical practice and stress in dental hygiene majoring students. Methods : Subjects were 250 dental hygiene majoring students in J area from March 20 to April 20, 2012. Data were analyzed using the statistical package SPSS WIN 12.0 for frequency, mean and standard deviation analysis, one-way ANOVA and multiple regression. Results : There were significant differences between Satisfaction and clinical practice, practice and major stress factors(p<0.01). There were significant differences between practices, satisfaction, and self-expectations(p<0.001). The explanatory power of the model was 9%(p<0.05). The combination of self-leadership, activity, interpersonal factors were very important factors and the explanatory power of the model was 8%(p<0.001). Conclusions : Self-leadership is able to decrease stress. Self-leadership is very important in clinical practice in dental hygiene majoring students.

• Journal of Korean society of Dental Hygiene
• /
• v.18 no.5
• /
• pp.797-806
• /
• 2018

Objectives: The purpose of this study was to analyze Influence of stress on oral health and quality of life. Methods: The participants were 172 students from 4 universities located in DaeJeon, South Korea. A questionnaire was administered, assessing the impacts of the general characteristics of the participants, temporomandibular joint (TMJ) symptoms, xerostomia, and halitosis on stress. And oral impacts on daily performance were also investigated. Data were analyzed using the Statistical Package for the Social Sciences 18.0. Results: The level of stress was higher in female, and the causes of stress was reported scholastic achievement, relations with professors, get a job. The students who were higher stress were more conscious of TMJ symptoms, xerostomia and halitosis(p<0.05). Stress was significantly positively correlated with TMJ symptoms (r=0.376, p<0.001), dry mouth (r=0.360, p<0.001), and bad breath (r=0.343, p<0.001). Oral Impacts on Daily Performance (OIDP) scores were significantly positively correlated with dry mouth, bad breath, TMJ symptoms, and stress. Regression analysis showed that 54.5% of the independent variables were related to OIDP scores. Stress and TMJ symptoms exerted a significant effect on OIDP scores. Conclusions: Stress among university students affects oral health and quality of life. Stress coping mechanisms and oral health care education programs should be developed and applied at universities.