• Title/Summary/Keyword: 김세연

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Development and Effectiveness Evaluation of the STEAM Education Program on Food Groups for Kindergarteners (식품군을 활용한 유치원생 대상 STEAM 교육 프로그램 개발 및 효과평가)

  • Ahn, Jinkyeong;Kim, Seyoen;Kim, Donghyuk;Lee, Jounghee
    • Korean Journal of Community Nutrition
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    • v.27 no.5
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    • pp.361-372
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    • 2022
  • Objectives: The purpose of this study was to explore the effectiveness of the STEAM (Science, Technology, Engineering, Arts, and Mathematics) education program on the use of specific food groups in improving nutrition-related knowledge and attitude, dietary behavior, creative problem solving, and STEAM attitude. Methods: We selected two classes at a kindergarten in Jeollabuk-do, South Korea. A total of 44 kindergarteners from the two classrooms participated in this study. The experimental group and the control group were formed with 22 students each. The experimental group attended 11 STEAM classes on the use of the grain, fruit, and milk food groups. First, we performed the paired t-test to examine changes from pre-to-post classes for both groups. Then, we used ANCOVA to compare post-test scores between the experimental and control groups with the adjustment of pre-test scores. Results: The results demonstrate that the STEAM education program on the use of the food groups significantly improved (1) nutrition-related knowledge and attitude, and dietary behavior (P < 0.001), (2) creative problem solving (P < 0.001), and (3) STEAM attitude (P < 0.001) in the intervention group when compared with the control group. Conclusions: The STEAM education program on the use of food groups is effective in enhancing nutrition knowledge and attitude, dietary behavior, creative problem solving, and STEAM attitudes among kindergarten students.

Effect of the speed sintering schedule on the marginal and internal gaps of multi-layered zirconia prothesis (급속소결이 다층 지르코니아 치과보철물의 변연 및 내면 적합도에 미치는 영향)

  • Kim, Se-Yeon;Kim, Jae-Hong
    • Journal of Technologic Dentistry
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    • v.44 no.1
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    • pp.1-7
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    • 2022
  • Purpose: The purpose of this in vitro study is to evaluate the clinical acceptability of the marginal discrepancies and internal spacing of multi-layered zirconia prothesis by speed sintering. Methods: The two specimen types come from the same manufacturer but differ in the ingredients in layered zirconia and indication, that is anterior and posterior. The designs of both specimens were full contour crowns, and a total of 20 pieces were repeatedly fabricated, 10 for each group. The specimens were divided into two subgroups (n=10) and sintered with various total times (4 hours, 8 hours) at the maximum temperature (1,530℃). The gap between the two groups of multi-layered zirconia prostheses was measured using a silicone replica technique of 2D analysis method. The independent sample t-test was then used to compare and analyze the data obtained from the two groups (α=0.05). Results: The marginal and internal gap was superior in the 8-hour compared to the 4-hour group, and the results exhibited significant differences (p<0.05). All specimens showed that using the speed sintering schedule does not exceed the clinically permitted value of 120 ㎛, meaning zirconia prothesis using the speed sintering was adequate. Conclusion: The sintering condition is shown to affect the marginal and internal gaps of multi-layered zirconia restoration.

Relationship between Stress, Temporomandibular Joint Disorders and Oral Health-Related Quality of Life in College Students (대학생의 스트레스와 턱관절 장애 및 구강건강관련 삶의 질의 관련성)

  • Jung, Su-Jin;Kim, Hyeon-Gyeong;Kim, Se-Yeon;Kim, Su-Bin
    • Journal of Convergence for Information Technology
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    • v.12 no.3
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    • pp.204-213
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    • 2022
  • This study was conducted to investigate the stress and temporomandibular joint disorders that can affect the oral health level of college students and to identify the relationship between oral health-related quality of life. Data survey was conducted from June 3, 2021 to July 8, 2021, targeting 227 college students in some areas of Daejeon, and was analyzed using independent sample t-test, one-way ANOVA, Pearson correlation analysis, and multiple regression analysis. As a result, temporomandibular joint disorder showed a positive correlation with all stress sub-factors, and oral health-related quality of life showed a negative correlation with all stress sub-factors and temporomandibular joint disorder. Also, it was found that temporomandibular joint disorder, interpersonal stress, and values stress had an effect on oral health-related quality of life. Based on the above results, it is required to find a systematic way to improve the quality of life related to oral health by preventing stress and temporomandibular joint disorder among college students.

The Effects of Thoracic Mobilizing and Stretching Exercise on Maximal Inspiratory Pressure and Maximal Expiratory Pressure in Healthy Adults (건강한 성인에게 가슴가동운동과 스트레칭운동이 최대들숨압 및 최대날숨압에 미치는 효과)

  • Kim, Se-Yeon;Hwang, Young-In;Kim, Ki-Song
    • PNF and Movement
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    • v.20 no.1
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    • pp.9-17
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    • 2022
  • Purpose: The purpose of this study was to investigate the effect of chest mobilization and stretching exercises on maximal inspiratory pressure and maximal expiratory pressure in healthy adults who use computers for extended periods of time each day due to coronavirus disease 2019. Methods: Twenty-five healthy adults in their 20s and without respiratory disease (15 female, 10 male) took part in this study. Two types of thoracic mobilizing exercises using a Theraband and three types of stretching exercises using a foam roller were performed. Maximum inspiratory pressure and maximum expiratory pressure were measured three times each before and after the interventions. In terms of statistical methods, the maximum inspiratory pressure due to chest mobility and stretching was compared with the maximum expiratory pressure using parametric paired t-test and non-parametric Wilcoxon signed-rank test. Results: Maximum inspiratory pressure (p = .012) and maximum expiratory pressure (p = .006) showed significant differences before and after chest mobilization exercise and stretching among the participants. Conclusion: The results of this study suggest that chest mobilization and stretching exercises are effective exercise methods for improving maximal inspiratory and expiratory pressure. They suggest that these exercises can prevent respiratory muscle weakness and improve aerobic fitness in healthy people as well as those in need of cardiorespiratory physiotherapy.

Effect of support thickness on the adaptation of Co-Cr alloy copings fabricated using selective laser melting (출력 지지대 두께가 선택적 레이저 용융법으로 제작된 금속 하부구 조물 적합도에 미치는 영향)

  • Jae-Hong Kim;Se-Yeon Kim
    • Journal of Technologic Dentistry
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    • v.45 no.3
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    • pp.67-73
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    • 2023
  • Purpose: This in vitro study aimed to evaluate the clinical acceptability of precision of fit of the support thickness of Co-Cr alloy copings fabricated using selective laser melting (SLM). Methods: Thirty dental stone models of maxillary left molar abutments were manufactured, images were taken using a scanner, and a computer-aided design program was used to design the form of a conventional metal ceramic crown coping. Overall, 30 single copings were made from Co-Cr alloy using SLM and divided into three support radius groups (0.1, 0.25, and 0.35 mm) of 10 for each. Digitized data were superimposed with three-dimensional inspection software to quantitatively obtain the machinability of a ceramic crown coping, and visual differences were confirmed using a color map. The root mean square values of the ceramic crown coping group were statistically analyzed using one-way analysis of variance (α=0.05). Results: The precision of fit was superior with 0.25 mm compared with 0.1 mm and 0.35 mm, and the results exhibited significant differences (p<0.05). All specimens showed that various support thicknesses did not exceed the clinically permitted value of 120 ㎛, which mean that more than 0.1 mm and 0.35 mm of support radius for SLM was adequate. Conclusion: The support thickness of Co-Cr alloy restoration fabricated using SLM is shown to affect the adaptation.

Effect of cement space on marginal and internal fit of a zirconia core fabricated using by additive manufacturing (시멘트 공간이 적층 가공으로 제작한 지르코니아 하부구조물의 변연 및 내면 적합도에 미치는 영향)

  • Ji-Won Min;Se-Yeon Kim;Jae-Hong Kim
    • Journal of Technologic Dentistry
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    • v.46 no.1
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    • pp.1-7
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    • 2024
  • Purpose: The goal of this study was to determine the clinical acceptability of various cement space settings for the marginal and internal fit of a zirconia core manufactured using additive manufacturing. Methods: The maxillary right incisor served as the master model. After scanning the maxillary right incisor with a dental 3D (three-dimensional) scanner, the stereo lithography file was created using different cement space settings of 40, 120, and 200 ㎛ using computer-aided design software (Dental System 2018; 3Shape). The marginal and internal fit of the 3 groups were determined using the silicon replica technique. Measurement points were divided into the following three categories: margin, axial wall, and incisal. To ensure more accurate measurements, these three measurement points were divided into 8 points. The Shapiro-Wilk, one-way ANOVA, and Tukey's honestly significant difference test (for all tests α=0.05) were the statistical analyses that were included in the study. Results: The CS (cement space)-200 group had better marginal and internal fit than the CS-40 and CS-120 groups, and there were statistically significant differences at the marginal and incisal points, except for the axial wall points. CS-200 group, both marginal and internal fit were within 120 ㎛, which is the clinically acceptable value. Conclusion: This study suggests that a 200 ㎛ cement space setting is ideal for optimal marginal and internal fit of 3D-printed ceramic crowns.

Caries preventive effect from community water fluoridation program (수돗물불소농도조정사업의 치아우식 예방효과)

  • Ha, Tae-Gyu;Kong, Wook-Sung;Kim, Se-Yeon;Kim, Ji-Soo;Lee, Jung-Ha;Kim, Han-Na;Kim, Jin-Bom
    • The Journal of the Korean dental association
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    • v.56 no.4
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    • pp.194-207
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    • 2018
  • Objectives: The water fluoridation program has been implemented since 2008 at the Daesan water treatment plant, Changwon City. The aim of this study is to evaluate caries preventive effect of permanent teeth from community water fluoridation program Methods: Evaluation surveys were conducted on 8-, 10- and 12-year olds in the fluoridated and non-fluoridated area of Uichang-gu and Seongsan-gu, Changwon City in 2015. The number of the subjects in 2015 was 722 in fluoridated area and 707 in non-fluoridated area. The caries preventive effect of permanent teeth by community water fluoridation was estimated by the differences in adjusted DMFT and DMFS scores between the program and control groups. Cofounders of mean number of fissure-sealed teeth or surfaces, and number of subjects by gender were adjusted to estimate the caries preventive effect of permanent teeth. Results: The mean DMFT score or DMFS score of children aged 8-, 10- and 12-years adjusted for the number of fissure-sealed teeth or surfaces in fluoridated area were significantly lower than those in non-fluoridated area in 2015. The caries preventive effect of permanent teeth estimated based on the difference of mean DMFT scores adjusted for fissure-sealed teeth, age and number of subjects by gender between control and program group among children was 37.3%. Conclusions: These results suggest that the caries preventive effect of permanent teeth from water fluoridation program at Daesan water treatment plant, Changwon City was so high that the water fluoridation program should be developed in other regions in Korea.

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Some dental hygienist by career expectations regarding clinical work done in the field of business studies (일부 치과위생사 임상업무분야에 관한 경력별 기대수행업무 연구)

  • Ahn, Se-Youn;Oh, Bo-Kyoung;Hwang, Sun-Hee;Yoo, Yonug-Suk;Kim, Sun-Kyung;Kang, Boo-Wol;Lee, Sun-Mi
    • Journal of Korean society of Dental Hygiene
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    • v.13 no.4
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    • pp.543-552
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    • 2013
  • Objectives : The aim of the study is to investigate job performance expectations according to duration of work and to specify the clinical practice of dental hygienists by career expectations. Methods : The subjects were 310 dental hygienists in Seoul and Incheon. They completed the self-reported questionnaires and 304 data were analyzed except incomplete 6 answers. Results : The tasks performed by dental hygienists were as follows ; SS crown restoration in pediatric dentistry accounted for 25.1%, orthodontics (42.1 %), plaque removal (71.4 %), temporary fillings (60.5%), and impression taking of abutments and bite registration (58.9%). In order to be a skillful dental hygienists, it took two to three years of clinical filed work. Conclusions : On the job training (OJT) is the most important in dental hygiene curricula. So it is necessary to develop the OJT performance skill.

Potential uses of Aristotelia chilensis extracts as novel cosmetic materials (마키베리 추출물의 화장품 신규 원료로서의 가능성)

  • Kim, Mijung;Park, Seyeon
    • Journal of Applied Biological Chemistry
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    • v.62 no.4
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    • pp.339-345
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    • 2019
  • The present study aims to investigate the potential applications of Aristotelia chilensis (A. chilensis) extracts as novel cosmetic materials. The total extracts of A. chilensis were partitioned into chloroform (CHCl3), ethyl acetate (EtOAc), and distilled water (DW) fractions. A. chilensis extracts exhibited no cytotoxicity toward HaCaT human keratinocyte and B16F10 mouse melanoma cell lines. CHCl3, EtOAc, and DW extracts reduced oxidative stress, and EtOAc extract was superior to glutathione, a natural human antioxidant positive control. The extracts of A. chilensis reduced melanin synthesis in cells treated with α-melanocyte-stimulating hormone. The extracts of A. chilensis exhibited antibacterial effects toward Staphylococcus aureus (S. aureus), Staphylococcus epidermidis (S. epidermidis), and Pseudomonas aeruginosa (P. aeruginosa). In particular, the EtOAc extract was effective in terms of antibacterial activity against S. aureus. In the present study, we identified several potential applications of A. chilensis extracts in terms of novel antioxidant and whitening cosmetic materials as well as antibacterial preservatives.

Identifying antibacterial activity components of cosmos flower extracts (코스모스 추출물의 항균활성 성분 탐색)

  • Kim, Mijung;Ahn, Seunghyun;Park, Seyeon
    • Journal of Applied Biological Chemistry
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    • v.63 no.3
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    • pp.249-257
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    • 2020
  • This study investigated whether the extracts from cosmos flowers exhibit antibacterial activities and identified which components were ascribed to the antibacterial effects. The antibacterial effects of extracts from white, pink, and violet cosmos flowers were observed for 24 h after inoculation with four kinds of bacteria, including Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, and Escherichia coli. Among the three fractions of cosmos flower extracts, the best antibacterial activity against the four bacteria was observed in the extracts isolated from the EtOAc layer. However, the extracts from the CHCl3 layer were also effective against S. aureus. Moreover, the first of white, second of pink, and first of violet silica gel fractions (Fr.) isolated from the EtOAc layer exhibited minimal inhibition at a concentration of 0.1 mg/mL. Comparison of NMR and High-Pressure Liquid Chromatography results between silica gel Fr. and apigenin suggested that the effective fractions can contain a component including apigenin moiety.