• Proceedings of the Korean Society of Food Hygiene and Safety Conference
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• 2001.10a
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• pp.16-18
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• 2001

• Proceedings of the Korean Society of Food Hygiene and Safety Conference
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• 2001.10a
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• pp.191-194
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• 2001

• Journal of Korean society of Dental Hygiene
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• v.11 no.5
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• pp.649-657
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• 2011

Objectives : The purpose of this study was to research attitude and satisfaction of the students in the department of dental hygiene in Jeolla-do and Chungcheong-do. Methods : We surveyed 499 students at the department of dental hygiene at colleges. During the period from October 2 to October 30, 2009 using a self-administered questionnaires. The data were analyzed with chi-square, t-test and one-way ANOVA, person correlation coefficients and multiple regression using the SPSS 13.0 program. Results : As for entrance motive with Dental Hygiene, 63.9% of the employment and selection information was 36.3% by oneself. As for pre-knowledge before entrance about dental hygiene by grade(p<0.01), as for satisfaction in the department dental hygiene by regional groups(p<0.05), as for aptitude suitability by educational system(p<0.05), as for encourage of enter school by grade and regional groups(p<0.05), by educational system(p<0.01) were statistically significant. As for encourage of enter school, aptitude suitability, pre-knowledge before entrance about dental hygiene were positive relation to satisfaction in the department dental hygiene. Multiple regression analysis indicated with explanatory power of 30.8% about satisfaction in the department dental hygiene. Conclusions : This study reports that it is necessary to carry out further studies on the various educational process and development of program in college. Dental hygiene education for the whole man and for promote efficiency in the department of dental hygiene, should be positive information activity via various media get the correct information of a department choice.

• Journal of dental hygiene science
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• v.23 no.2
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• pp.93-102
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• 2023

Background: To investigate political participation by dental hygiene students and analyze the differences therein based on the learning efficacy of dental hygiene policy. Methods: A total of 239 dental hygiene students who were expected to graduate responded to the survey. The data were collected online using a structured questionnaire consisting of 6 items on general characteristics, 10 on political participation, and 15 on the learning efficacy of dental hygiene policy. Statistical analysis was performed using SPSS 23.0. Political participation based on the learning efficacy of dental hygiene policy was analyzed using independent t-tests, ANOVA, and multiple regression analysis (p<0.05). Results: Among the dental hygiene students, 60.7% voted in all three recent presidential, general, and local elections, and 14.2% did not. For political parties supported, 65.7% responded that they had "no supporting party," and 34.3% indicated that they had a "supporting party." In terms of the level of political participation of dental hygiene students (0~50 points), the average score was 25.8 points, with the average passive political participation (0~25 points) score at 15.6 points and the average active political participation (0~25 points) score at 10.2 points. With an increase in dental hygiene policy learning efficacy, both passive and active political participation showed higher scores (p<0.05). Conclusion: Dental hygiene students showed low political participation. The presence of a supporting party, higher voting participation, and higher learning efficacy of dental hygiene policy were associated with higher passive and active political participation. Therefore, to increase this population's interest in political participation, various opportunities for related learning need to be promoted and provided in academia, leading to the enhancement of their political capabilities. In this manner, dental hygienists should expand their capabilities in various roles such as advocates, policy makers, and leaders.

• Journal of the korean academy of Pediatric Dentistry
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• v.24 no.1
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• pp.247-264
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• 1997

501 preschool children from 4 to 6 years were examined for their salivary reductase activity and caries experience by Resazurin Disc Test and dental examination respectively. We asked the parents about their children's oral hygiene habits, between-meal eating habits, and physical exercise habits by the questionnaire. Toothbrushing frequency had negative relation to salivary reductase activity and caries experience. Caries experience was low when parents did toothbrushing for children, when teeth were brushed at bedtime, and when fluoride toothpastes were used. Salivary reductase activity and caries experience were high in bread & cookies group, chocolates & candies group, milk & soft drink group, and fruits & vegetables group in order. Caries experience was high in case of irregular between-meal eating. Sweet food eating frequency had positive relation to caries experience. Caries activity was low in case of eating homemade non-sweet between-meals. Salivary reductase activity and caries experience were low when gum-chewing frequency was high. Salivary reductase activity and caries experience were high when the amount of physical exercise was low.

• Korean Journal of Materials Research
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• v.33 no.2
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• pp.47-53
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• 2023

When exposed to different types of bacteria in the oral cavity, denture based resins are prone to bacteria attachment. The purpose of this study was to investigate the physical, biological, and antimicrobial properties of denture base resins coated with Peony extract (200, 400, and 600 ㎍/mL). Specifically, the surface properties (microhardness, contact angle, and color change of the coated specimens), cell cytotoxicity (measured using MTT assay), and antimicrobial activity (against S. mutans (Streptococcus mutans) and C. albicans (Candida albicans) using a growth inhibition assay) were evaluated. The polyphenol content was measured using ultraviolet-visible (UV-vis) spectrometry. The experimental groups (specimens coated with Peony extract) and a control group (specimens coated without Peony extract) were statistically compared using a one-way analysis of variance and Tukey's post-hoc tests. No statistically significant differences in surface properties or cell cytotoxicity were observed, which demonstrated their biocompatibility. Conversely, a statistically significant difference in antimicrobial activity was observed between the experimental and control groups after 48 h. This confirms the antimicrobial activity of the denture base resin coated with Peony extract and demonstrates that it is a promising dental material for preventing stomatitis.

• Journal of Korean society of Dental Hygiene
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• v.15 no.2
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• pp.311-317
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• 2015

Objectives: The purpose of this study was to identify the effects of xylitol and sorbitol mouth rinse on the salivary caries activity levels. Methods: The study subjects were 38 female college students in Gyeongju, Korea. The subjects visited the institution once a week for 4 weeks and the saliva samples were measured for the amount of salivary caries activity levels. The saliva was collected 5 times and incubated in Mitis Salivarius Agar for 48 hours(VS-1203P3L, Vision, Korea) and measured. Results: The Streptococcus mutans CFU decreased by statistically significant amounts as compared to before the experiment within the xylitol group and the sorbitol group(p<0.01). After three weeks of mouth rinse application, Streptococcus mutans CFU of the xylitol group and the sorbitol group showed statistically significant differences(p<0.05). The salivary flow rates within the xylitol group and sorbitol group increased by statistically significant amounts(p<0.01) than before the test. The change in the salivary buffering capacity decreased by a statistically significant amount as compared to before experiment within the xylitol group(p<0.01). Conclusions: The salivary caries activity levels decreased after using xylitol and sorbitol mouth rinse in CFU and the flow rate. The buffering activity levels increased within the xylitol group. Further follow-up studies would be necessary to identify the various effects of xylitol.

• Journal of Korean society of Dental Hygiene
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• v.17 no.4
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• pp.613-620
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• 2017

Objectives: The purpose of this study is to investigate the antibacterial effect of Streptococcus mutans of tea tree ingredient. Methods: The experimental groups were each given with different concentrations (30 or 50 vol%) of tea tree prepared in saline solution. The control group applied only saline solution. The tea tree coating of the specimen were examined under a scanning electron microscope. For the antibacterial activity test of the tea tree, the contact angle of the tea tree- coated specimen's surface was analyzed. The antibacterial effect against Streptococcus mutans was determined by counting the colony forming units (CFU). The statical statics were evaluated by using one-way ANOVA and paired t-test. Results: The tea tree treated group of hydrophilic more than non treated group. Antibacterial experiments demonstrated that tee tree solution was effective against Streptococcus mutans. However there was no significant difference in depending solution concentration groups. Conclusions: The antimicrobial activity of the tea tree containing solution showed its potential for use as coating for denture and medical materials.

• Journal of Korean society of Dental Hygiene
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• v.17 no.3
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• pp.441-448
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• 2017

Objectives: The purpose of this study was to examine the cell proliferation and expression of alkaline phosphatase (ALP) during the differentiation of murine odontoblast-like cells (MDPC-23) by Cimicifuga rhizoma extract. Cimicifuga rhizoma extract was prepared using 70% ethanol. Then, the cells were treated with 25, 50, 100, 150, and $200{\mu}g$ of Cimicifuga rhizoma extract. Methods: We determined the Cimicifuga rhizoma effects of MDPC-23 using WST-1 (water soluble tetrazolium salt-1) assay, ALP activity assay and histochemical staining. Results: $25-200{\mu}g$ of Cimicifuga rhizoma extract did not inhibit the growth of MDPC-23 cells; $100{\pm}0$, $100{\pm}3.29$, $99{\pm}4.86$, $98{\pm}3.80$, $98{\pm}1.73$, $99{\pm}5.05%$ (p<0.794). $50{\mu}g$ of Cimicifuga rhizoma extract stimulated ALP activity on MDPC-23; $5.1{\pm}0.20units/{\mu}{\ell}$ (p<0.001). Conclusions: It was proven that Cimicifuga rhizoma promoted differentiation of MDPC- 23 cells.

• Journal of Korean society of Dental Hygiene
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• v.13 no.2
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• pp.181-191
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• 2013

Objectives : The research was performed to be used as basic data for dental hygienists' job satisfaction during clinical practice, and planning and operating effective clinical practice by analyzing stress factors in dental hygienists and the extent of stress caused by students in clinical practice. Methods : The research was aimed at dental hygienists working at college dental hospitals, dental clinic of general hospitals, dental hospitals and dental clinics located in Seoul and Gyeonggi province where clinical practices were conducted for dental hygiene students. For analysis, collected data was analyzed by using SPSS 20.0. Results : Results derived from analysis on characteristic difference by pattern of hospital were observed that there was a significant difference in job satisfaction by pattern of hospital. Results from analysis on correlation among stress factors were observed that there was correlation between behavior and attitude, interpersonal relationships, role and activity, ideal and value, and treatment fields. Results derived from analysis on the effect of stress factors on the job satisfaction were observed that role and activity (p=.002<.01), ideal and value (p=.019<.05), and treatment fields (p=.032<.05) affected the job satisfaction, while behavior and attitude (p=.386>.05), and interpersonal relationships ((p=.421>.05) did not affect the job satisfaction. A stress factor, role and activity (${\beta}$=.350) affected the job satisfaction the most, followed by ideal and value (${\beta}$=.242), and treatment fields (${\beta}$=-.185). For the explanation ability, the stress factors accounted for 20.5% of the job satisfaction. Conclusions : In conclusion, most of the dental hygienists are satisfied with students' clinical practice by pattern of hospital. Positive correlation was shown between stress factors. Behavior and attitude and ideal and value are high in stress in college dental hospitals, role and activity and treatment fields are high in stress in dental hospital, and interpersonal relationships are high in stress in dental clinics.