• 치위생과학회지
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• 제23권2호
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• pp.112-122
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• 2023

Background: This study aimed to evaluate the effect of a prefabricated functional appliance (Myobrace^®) on skeletal, dental, and soft tissue components in children with Class II, division 1 malocclusion. Methods: Thirteen patients with Class II, division 1 malocclusion (9 girls and 4 boys; mean age, 8.2±0.9 years at the start and 9.3±1.0 years at the end of the treatment) were treated with Myobrace^® for a mean period of 12.9±4.0 months. Patients were instructed to use the appliance daily for 1 hour and overnight while sleeping. A control group of 10 patients with untreated Class II, division 1 malocclusion (3 girls and 7 boys; mean age, 9.0±1.6 years at the start and 10.4±2.1 years at the end of the observation) was included to eliminate possible growth effects. The mean observation period for this group was 17.7±11.2 months. Lateral cephalograms were taken at the start and end of the treatment, and findings from 41 measurements were analyzed using the V-Ceph^TM program. The mean and standard deviation of cephalometric measurements were analyzed using paired and independent sample t-tests. Results: The treatment group showed significant changes in SNB, ANB, maxillary protrusion, ramus height, proclination of upper anterior teeth, interincisal angle, overjet, and upper lip protrusion compared with the control group. However, only decrease in ANB, maxillary protrusion, overjet, upper lip protrusion, and increase in interincisal angle were significantly higher in the treatment group than in the control group. Conclusion: The prefabricated functional appliance induced skeletal, dentoalveolar, and soft tissue changes, resulting in a significant reduction in anteroposterior discrepancy.

• IMMUNE NETWORK
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• 제10권6호
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• pp.239-246
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• 2010

Background: Monoclonal antibodies (mAbs) recognizing Class III epitope of CD34 are essential for flow cytometric diagnosis of leukemia. Methods: 27H2 mAb was developed from a mouse alternatively immunized with human acute leukemia cell lines, KG1 and Molm-1. Using flow cytometric analysis of various leukemic cell lines and peripheral blood, immunohistochemical study of frozen tonsil, we characterized 27H2 mAb. Antigen immunoprecipitated with 27H2 mAb immunobloted with anti-CD34 mAb. A case of bone marrow sample of acute lymphoblastic leukemia (ALL) patient was obtained at CBNU Hospital. For epitope identification enzyme treatment with neuraminidase and O-sialoglycoprotein endopeptidase (OSGE) and blocking assay with known classIII mAb (HPCA-2) were done. Results: Only KG1 and Molm-1 revealed positive immunoreactivity. Immunohistochemical staining disclosed strong membranous immunoreactivity on high endothelial venules. Antigen immunoprecipitated by 27H2 mAb showed approximately 100 kDa sized band immunoblotted with anti-CD34 under non-reducing conditions. Epitope recognized by 27H2 mAb disclosed resistancy to both neuraminidase and OSGE treatment and completely blocked with known class III mAb preincubation. CD34 positive leukemic cells in BM of pre B cell ALL patient detected by FITC-conjugated 27H2 and HPCA-2 were identified with similar sensitivity. Conclusion: A novel murine mAb recognizing class III epitope of human CD34 with high affinity, which is useful for flow cytometric diagnosis of leukemia, was developed.

• 대한치과교정학회지
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• 제22권3호
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• pp.691-701
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• 1992

Over recent 20 years, with socioeconomic development and change of recognition of the population, more people are concerned about their health and appearance. To obtain the change of frequency of malocclusion and the demand for orthodontic treatment, with this trend, 2460 freshmen and students of Yonsei Univ. in 1991, aged from 18 to 21 were examined excluding 187 students who have history of orthodontic treatment, 86 students who are undergoing treatment, 39 students who have too much missing teeth to classify. After analize the frequency of malocclusion and the demand for orthodontic treatment, following results was obtained. 1. Sex ratio in the prevalence of malocclusion was $91.7\%/90.8\%$, male to female, so there was no sex predilection. 2. With regard to Angle's Classification, each percentage of Class I, Class II div. 1, Class II div. 2 and Class III was $61.6\%,\;11.3\%,\;1.9\%\;and\;16.7\%$. 3. Of Class I malocclusion, percentage of crowding was 53.2, this occupied the largest part of single findings and prevalent findings in combinations were also crowding - crossbite and crowding - Protrusion. 4. Of Class I malocclusion, over the portion of$95\%$, Bialveolar Protrusion have arised alone. 5. The distribution of Demands for orthodontic treatment of malocclusion were $41.3\%$ in males, and $51.3\%$ in females.

• Kyungpook Mathematical Journal
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• 제28권2호
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• pp.129-139
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• 1988

Let $T^{\alpha}_{\lambda}$(p, A, B) denote the class of functions $$f(z)=z^p-{\sum\limits^{\infty}_{k=1}}{\mid}a_{p+k}{\mid}z^{p+k}$$ which are regular and p valent in the unit disc U = {z: |z| <1} and satisfying the condition $\left|{\frac{{e^{ia}}\{{\frac{f^{\prime}(z)}{z^{p-1}}-p}\}}{(A-B){\lambda}p{\cos}{\alpha}-Be^{i{\alpha}}\{\frac{f^{\prime}(z)}{z^{p-1}}-p\}}}\right|$<1, $z{\in}U$, where 0<${\lambda}{\leq}1$, $-\frac{\pi}{2}$<${\alpha}$<$\frac{\pi}{2}$, $-1{\leq}A$<$B{\leq}1$, 0<$B{\leq}1$ and $p{\in}N=\{1,2,3,{\cdots}\}$. In this paper, we obtain sharp results concerning coefficient estimates, distortion theorem and radius of convexity for the class $T^{\alpha}_{\lambda}$(p, A, B). It is further shown that the class $T^{\alpha}_{\lambda}$(p, A, B) is closed under "arithmetic mean" and "convex linear combinations". We also obtain class preserving integral operators of the form $F(z)=\frac{p+c}{z^c}{\int^z_0t^{c-1}}f(t)dt$, c>-p, for the class $T^{\alpha}_{\lambda}$(p, A, B). Conversely when $F(z){\in}T^{\alpha}_{\lambda}$(p, A, B), radius of p valence of f(z) has also determined.

• 한국식품영양학회지
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• 제2권1호
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• pp.61-72
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• 1989

This study was conducted to gather the baseline data on realities of experimental-practice and opinions toward spot-practice, and to examine how to cope with the problems raised at the Department of Food and Nutrition of Junior Technical College in Korea. Questionnaires were gathered from 42 chairmans of the Department of Food and Nutrition and 140 Present dieticians worked in Seoul, Bucheon am Seongnam area. The results are as follows, First, as a whole, each college had 2~3 experimental laboratory (Lab), in which Cooking Science Lab. Chemistry Lab and Microbiology Lab were occurred at higher frequency as Lab's name. Second, the numbers per experimental-practice class were more than 40 at most colleges. 85% of Present dieticians have answered to feel too much numbers per the class during their college days, whereas professors' opinions toward the numbers per class were suitable at 20~30 persons per class. Third, professors' opinion toward the adquate ratio of the theory subject classes to experimental subject classes was suitable at 60 : 40. Dieticians answered to take the theory subject classes partly or mostly on behalf of the experimental-practice classes. Fourth, the main reasons which inhibited normal experimental-practice class were the class for emphasis on examination, the shortage of experiment budget, the excess of class members, the shortage of experimental Lab Also, this results showed same propensity to present dieticians' opinion toward the same question above. Fifth, among the experimenta1-practice subjects established at the Department of Food and Nutrition, Diet Therapy Lab was highest frequency class emphasized on theory followed by Nutrition Counselling Lab, Food Processing and Storage Lab, Food Hygiene Lab and Food Microbiology Lab in that order. Here, Basic Chemistry Lab, Biochemistry Lab, Food Microbiology Lab were pointed as subjects far from the present task of dieticians. Sixth, Department of Food and Nutrition, as a whole, has conferred with spot-practice arrangement About 50% (all who want to join spot-practice) of second year students took part in spot-practice. In the other way, all colleges except for 2 colleges didn't give the credit for the spot-practice system. Seventh, according to the on analysis on spot-practice places, manufacturing company was at highest frequcney followed by hospitals, elementary school having group feeding system in that order. Especially, 16.7% (5 colleges) of the total colleges sent the students to the research institute related to food industry for spot-practice experience. Eighth, Professors' opinions toward the spot-practice time and period were preferable on summer vacation of second year and for 1~2 weeks, respectively. On the contrary, 74 dieticians answered to the adquate period as for 4 weeks. Ninth, 86 dieticians of the total 140 answered to complete the spot-practice during their college days, which helps the present task of them. Lacks of spot-practice program, Lacks of comprehension of upper personals and lacks of group feeding equipments ranks higher as difficulties in spot-practice management.

• 구강회복응용과학지
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• 제38권2호
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• pp.81-89
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• 2022

목적: 여러 근관치료용 무선 핸드피스에서 발생되는 진동의 크기와 양상을 비교해 보고자 한다. 연구 재료 및 방법: 클램프로 고정시킨 5개의 근관치료용 무선 핸드피스(X Smart IQ, E Connect S, Endo A Class, ENDOIT, TRAUS ENDO)의 헤드부분에 가속도계를 이용하여 회전운동과 왕복운동방식으로 동작할 때 핸드피스 자체에서 발생하는 진동가속도를 측정하였다. 결과: 모든 근관치료용 무선 핸드피스에서 회전운동보다 왕복운동에서의 평균진동가속도가 유의하게 높게 나타났다(P < 0.001). 회전운동에서는 급격한 진동의 크기 변화 없이 일정한 진폭의 반복적인 진동그래프가 얻어졌으며, 평균진동 가속도 값은 X Smart IQ, Endo A Class, ENDOIT, E Connect S, TRAUS ENDO 순이었고(P < 0.001), X Smart IQ와 Endo A Class 사이에는 통계적으로 유의한 차이가 없었다. 왕복운동에서는 한 주기 안에 특정 지점에서 큰 진폭의 피크가 나타나는 양상의 진동그래프가 얻어졌으며, 평균진동가속도 값은 X Smart IQ, E Connect S, Endo A class, ENDOIT, TRAUS ENDO 순이었다(P < 0.001). 결론: 무선 근관치료용 핸드피스 종류에 관계없이 회전운동보다 왕복운동에서 더 큰 진동이 발생하였다. 왕복운동에서는 모든 핸드피스에서 진동의 차이가 있었다(P < 0.001).

• 패션비즈니스
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• 제6권6호
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• pp.43-55
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• 2002

This study intends to consider the characteristics of Tudorian costume and find out how the thoughts and cultures in those days had influences on the costume trends of low and middle class. In terms of the Tudorian costume which generated new cultural mainstreams along with blossomed civil culture, this study focuses on the characteristics and trends of costume at low and middle class, which have been little addressed in studies on western costume history or related fields, turning from the costume of upper class based on wealthy noblemen who showed off its dignity and authority along with jewelry and gorgeous ornamental craftsmanship. This study used related pictures, museum material and other literatures as its reference. It first looked into the general characteristics of western costume and considered the characteristics of costumes popularized in professionals at middle class such as apprentice, yeomen and low-class people. Professional or other middle class almost typically used to wear tunic, doublet, shirts, coat or long gown. Black was mainly used as clothes color. Similarly to upper class, silk or velvet was very often used as material. People at low class enjoyed wear costumes with simple and easy style for working. They also preferred natural color and cotton or wool as material. This study intended to find out which type of costumes people at low and middle class enjoyed wearing, rather than compare costume between such two classes.

• 한국콘텐츠학회논문지
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• 제21권2호
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• pp.386-394
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• 2021

본 연구의 목적은 교육대학과 일반대학 사범대에 재학 중인 대학생을 대상으로 온라인 영어수업에 대한 수업만족도를 비교·분석하며 집단 간 만족도 항목에 따른 통계적 유의미한 차이가 있는지를 검증하는 것이다. 또한 이를 토대로 온라인 영어 수업의 효율성 제고를 위한 제언을 하고자 한다. 이를 위하여 2020년 1학기에 온라인 영어 과목을 수강한 교육대학 재학생 54명과 일반대학 사범대 재학생 50명이 연구에 참여하였다. 연구도구로는 온라인 설문지가 활용되었으며 본 연구 주제와 관련된 선행연구를 기초로 5개 항목 50문항의 설문이 제작되어 배포되었다. 수업 만족도의 하부요인은 학습 내용/운영, 학습결과, 수업환경, 학습지원, 효과성으로 분류하였으며 자료 분석은 통계적 유의수준을 .05%로 하여 기술통계와 독립표본 t검정을 실시하였다. 설문결과를 토대로 분석한 내용을 정리 요약하면 다음과 같다. 첫째, 온라인 영어 수업을 수강한 교육대학 재학생과 일반대학 사범대 재학생의 수업만족도에 대한 조사 결과 전체 만족도는 일반대학의 평균값이 교육대학에 비해 조금 높은 것으로 나타났다. 다만 두 집단 간 수업만족도에 대한 독립표본 t검정결과 통계적으로 유의미한 값을 보이지는 않았다. 둘째, 수업만족도의 하위요인별 두 집단 간의 차이를 파악하기 위해 독립표본 t검정을 실시한 결과 하위요인 5개 가운데 수업환경, 학습지원, 효과면에 있어서 두 집단 간 통계적으로 유의미한 차이가 있음을 확인하였다.

• 대한소아치과학회지
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• 제42권2호
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• pp.144-150
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• 2015

유치열기의 3급 부정교합은 조기 치료가 추천되지만 정확한 진단이 쉽지 않다. 3급 부정교합의 골격성 특성과 치아 발육상태 사이에 연관성이 있다면 골격성 3급 부정교합의 감별 진단을 위한 평가 항목으로 치아성숙도가 활용될 수 있을 것이다. 본 연구는 유치열기의 골격성 혹은 비골격성 3급 부정교합으로 진단받은 환아를 대상으로 치아 석회화도 및 제 1대구치의 맹출률을 비교, 분석하여 상하악의 치아성숙도 차이가 유치열기 3급 부정교합의 감별 진단시 평가 항목으로 사용될 수 있는지 알아보기 위한 목적으로 시행되었다. 전치부 반대교합을 주소로 부산대학교 치과병원 소아치과에 내원한 유치열기 아동 중 비골격성 3급 부정교합군 18명과 골격성 3급 부정교합군 34명을 연구대상으로 선정하였다. 파노라마 방사선사진상에서 치령 및 제1대구치 맹출률을 비교, 분석하여 다음과 같은 결과를 얻었다. 골격 및 성별에 따른 역령과 치령의 차이는 존재하지 않았으며, 두 군 모두 역령에 비해 치령이 높게 나타났다(p < 0.05). 비골격성군과 골격성군의 상하악 맹출률의 차이는 각각 16.53%, 18.91%로 통계학적으로 유의한 차이를 보여(p < 0.05), 3급 부정교합의 감별 진단을 위한 평가 항목으로서 제1대구치 치아성숙도의 활용 가능성을 시사한다.

• 치과방사선
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• 제16권1호
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• pp.69-79
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• 1986

The purpose of this investigation was to know correlation of mean values between centric occlusion and centric relation by the cephalogram in Angle's Class Ⅰ and Ⅲ malocclusion subjects. 22 adults with Angle's Class Ⅰ malocclusion (17 men and 5 women, 21 to 27 years of age) and 14 adults with Angle's Class Ⅲ malocclusion (10 men and 4 women, 21 to 27 years of age) were selected from the dental students in Yonsei University. Each subject was given two lateral cephalometric radiographies and cephalometric analysis was performed. All data from these analyses was recorded and statistically processed with CYBER computer system. 1. The results were obtained as follows: There was a strong positive correlation between centric occlusion and centric relation in all subjects with Angle's Class Ⅰ and Ⅲ malocclusion. 2. In Angle's Class Ⅰ malocclusion, measurements in lower facial height revealed significant difference between centric occlusion and centric relation (P<0.05). In Angle's Class Ⅲmalocclusion, measurements in facial axis angle, mandibular plane angle, convexity of A point, lower incisor protrusion, lower facial height revealed significant difference between centric occlusion and centric relation (P<0.05). 3. When the mandible was moved from centric occlusion to centric relation, the mean distance of mandibular movement was 1.27㎜ (0.2-2.8㎜) in Angle's Class Ⅰ malocclusion, 1.70㎜ (0.55-4.15㎜) in Angle's Class Ⅲ malocclusion, and 1.44㎜ (0.2-4.15㎜) in all subjects.