• International Journal of Oral Biology
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• v.42 no.4
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• pp.175-181
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• 2017

The aim of this study was to provide a basis for the molecular mechanism underlying the pharmacological action of ethanol. We studied the effects of 1-propanol on the location of n-(9-anthroyloxy)palmitic acid or stearic acid (n-AS) within the phospholipids of synaptosomal plasma membrane vesicles (SPMV). The SPMV were isolated from the bovine cerebral cortex and liposomes of total lipids (SPMVTL) and phospholipids (SPMVPL). 1-Propanol increased the rotational mobility of inner hydrocarbons, while decreasing the mobility of membrane interface, in native and model membranes. The degree of rotational mobility varied with the number of carbon atoms at positions 16, 12, 9, 6 and 2 in the aliphatic chain of phospholipids in the neuronal and model membranes. The sensitivity of increasing or decreasing rotational mobility of hydrocarbon interior or surface by 1-propanol varied with the neuronal and model membranes in the following order: SPMV, SPMVPL and SPMVTL.

• Journal of dental hygiene science
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• v.18 no.1
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• pp.32-41
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• 2018

This study investigated the relationship between the organizational culture, organizational support, organizational health, personal health, and quality of work life of dental hygienists and analyzed the factors affecting the quality of work life in order to identify ways to improve their quality of work life. A total of 320 dental hygienists completed a self-administered survey; after excluding data from 21 respondents, 299 responses were included in the analysis. Frequency analyses, t-tests, one-way analysis of variation (ANOVA), and correlation analyses were conducted. A path analysis was also conducted to confirm the causal relationships. The findings are as follows. First, there was a significant difference in several general characteristics of the organizational culture including years in the current job and the number of dental hygienists; organizational support including age and the number of dental hygienists; organizational health including years in the current job and annual salary; and personal health including annual salary. Second, the quality of work life showed a positive correlation with organizational culture, organizational support, personal health, and organizational health in that order. Third, the results of path analysis revealed that organizational culture had a positive effect on organizational support; organizational support and personal health on organizational health; organizational support on personal health; and organizational support and organizational health on quality of work life. In addition, organizational support and organizational health had a direct effect on the quality of work life, while organizational culture, organizational support, and personal health had an indirect effect. These results indicated existence of a relationship among organizational culture, organizational support, organizational health, personal health, and quality of work life. It is necessary to identify ways to improve the quality of work life of dental hygienists.

• Journal of Korean society of Dental Hygiene
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• v.7 no.4
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• pp.595-609
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• 2007

The purpose of this study was to classify the courses of the dental-hygiene curricula into several categories by field, to incorporate the subjects in the same category into an integrated course, and to suggest how to ensure the successful phase-in application of integrative education according to Ronald M. Harden's 11-stage integrative ladder model. The findings of the study were as follows: 1. When the existing curricula were analyzed, it's found that many credits were provided to the courses in the area of basic dentistry that offered both theory and practice. In particular, the subjects tested by the national examination were offered by every college. In the field of public oral health, the largest number of credits was allocated to theory of oral prophylaxis and practice courses. In clinical area, clinical practice, in the area of dental office management, dental insurance course was given the largest credit. There were 31 to 61 major subjects in the colleges, which indicated that the major subjects were segmented in detail. 2. It seemed necessary to incorporate the subjects in the field of basic dentistry into oral biology, and theory of oral prophylaxis/practice, preventive dentistry/practice, preclinical stage, emergency treatment and introduction to dental hygiene should be integrated in to clinical dental hygiene. The courses in clinical area should be combined into clinical dentistry, and in the field of medical management, dental insurance, hospital management and medical relation law should be incorporated into management of dental clinic. 3. In the 11-stage integrative ladder, the subjects in the same field could perfectly be incorporated as the stages advanced. Each of the subjects was less emphasized, and communication and joint plans among teachers who were respectively in charge of the courses were increasingly considered important. Specifically, there should be a consensus among the teachers in regard to the outline of teaching programs, order of education. objects and objectives of programs and what and how to evaluate.

• The Journal of the Korea Contents Association
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• v.14 no.9
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• pp.350-361
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• 2014

The purpose of this study was to find general trends in dental fear among adolescences at 15-17 years of age, differences in levels of dental fear according to relevant variables, and the degrees to which those variables influence fear of dental treatment and their causal relationships. The researcher made use of a questionnaire including tools of questionnaire survey DFS, DBS and questions regarding characteristics of adolescences, and then analyzed covariate structure modeling by using LISREL 8.12 after conducting univariate analysis by employing SPSS. Cronbach's reliability coefficients showed higher in DFS(0.957), DBS(0.916), and GFS(0.910). The more recent experience in pain in the oral cavity and the stronger pain when treating dental disease and the more frequent experience in pain when treating dental disease and also the more broken dental appointments, the higher levels of dental fear showed with statistical significance. The linear structure equation model was statistically appropriate and well fit. By the model, severity and frequency of pain during treatment, experience of breaking dental visit appointment, distrust for dentists and general fear were directly influenced on dental fear.

• Journal of Korean society of Dental Hygiene
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• v.20 no.3
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• pp.269-279
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• 2020

Objectives: Previous studies have reported inconsistent findings in the association between dental diagnostic X-ray exposure and thyroid cancer. This study was a meta-analysis of case-control studies evaluating the association between exposure to dental radiation and the thyroid cancer risk. Methods: We searched the PubMed and EMBASE databases to identify studies on dental radiation and thyroid cancer risks that were published up to September 2018. Quality of studies was assessed using the Newcastle-Ottawa scale. A fixed-effects model was used to estimate pooled odds ratios (ORs) and 95% confidence intervals (CIs) using STATA 14.0. Potential publication biases were evaluated using Egger's test and Begg's funnel plot. Results: From the literature search, we included six case-control studies in this meta-analysis. The meta-analysis using the fixed-effects model found that dental X-ray exposure was associated with 2.34 times increased risk for thyroid cancer (OR=2.34, 95% CI=1.79-3.21). There was no heterogeneity in the data (p=0.662, I² =0%). Egger's test showed that there was no publication bias (p=0.532). Conclusions: This meta-analysis confirmed the association of dental X-ray exposure and thyroid cancer risk. The current results underscore the importance of applying safety regulations at dental clinics to protect thyroid glands during dental radiography examinations.

• The Journal of the Korean dental association
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• v.54 no.1
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• pp.27-38
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• 2016

Objectives: This study evaluated the outcomes of continuing professional education in implant dentistry using Kirkpatrick's four-level evaluation model. Material and methods: The study was carried out through a questionnaire distributed to dentists who attended a continuing professional education in implant dentistry, 2008~2012. They were asked to fill out questionnaires at least 6 months after its completion. Results: Mean ages of total 23 dentist was $44.8^{\circ}{\ae}8.2$. Mean period after completion of education was $2.7^{\circ}{\ae}1.2$. Knowledge (level 2) (r=0.71, p<0.01) and behavior (level 3) (r=0.68, p<0.01) was positively correlated with topic and methods of education in reaction (level 1). Behavior was positively correlated with knowledge (r=0.79, p<0.01). Result (level 4) was positively correlated with knowledge (r=0.64, p<0.01) and behavior (r=0.86, p<0.01). Conclusion: Reaction affects on knowledge, behavior and result in order.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.17 no.2
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• pp.47-53
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• 2018

Nowadays, additive manufacturing (AM) technology is a promising process to fabricate complex shaped devices applied in medical and dental services. Among the AM processes, a DLP (digital light processing) type 3D printing process has some advantages, such as high precision, relatively low cost, etc. In this work, we propose a simple method to fabricate precise dental models using a DLP 3D printer. After 3D printing, a part is commonly post-cured using secondary UV-curing equipment for complete polymerization. However, some shrinkage occurs during the post-curing process, so we adaptively control the UV-exposure time on each layer for over- or under-curing to change the local shape-size of a part in the DLP process. From the results, the shrinkage amounts in the post-curing process vary due to the UV-dose in 3D printing. We believe that the proposed method can be utilized to fabricate dental models precisely, even with a change of the 3D CAD model.

• The Journal of the Korean dental association
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• v.40 no.2 s.393
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• pp.107-117
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• 2002

• The Journal of the Korean dental association
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• v.42 no.2 s.417
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• pp.60-67
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• 2004

• The Journal of the Korean dental association
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• v.27 no.10 s.245
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• pp.971-980
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• 1989