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- 저자 : 이혜원(Haewon Lee) (검색결과 5 건)
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Biologic Response of Human Deciduous Dental Pulp Cells on Newly Developed MTA-like Materials
이혜원,신유석,정재은,김성오,이제호,송제선,Lee, Haewon,Shin, Yooseok,Jung, Jaeeun,Kim, Seongoh,Lee, Jaeho,Song, Jeseon Korean Academy of Pediatric Dentistry 2015 大韓小兒齒科學會誌 Vol.42 No.4
본 연구의 목적은 다양한 MTA 재료(ProRoot MTA, RetroMTA, Endocem Zr)에 대한 유치 치수 세포의 생활력 및 분화능을 비교 평가하는 것이다. 유치 치수세포는 각 재료별로 경화된 원형 디스크를 이용하여 직접법 및 간접법으로 세포 생활력을 관찰하였다. 또한 재료별 추출물을 이용하여 pH를 측정하였으며, alkaline phosphatase(ALP) 활성도 및 Alizarin Red S 염색법을 통하여 세포의 분화능을 관찰하였다. 직접법에서 유치 치수세포는 ProRoot MTA와 RetroMTA에서 Endocem Zr에 비해 높은 세포 생활력을 보였으나, 반면 간접법에서는 Endocem Zr에서 다른 재료에 비해 높은 세포 생활력이 관찰되었다. pH의 경우 Endocem Zr가 다른 두 재료에 비해 낮은 알칼리성을 나타냈다. 모든 재료에서 ALP 활성도는 대조군에 비해 증가하지 않았으며, Alizarin Red S 염색결과 유치 치수세포의 분화능이 대조군에 비해 낮았다. 본 실험에서 재료별 차이는 있었으나 모든 재료에서 어느 정도의 세포 독성이 관찰되었으며, 유치 치수세포의 생활력과 분화능을 증진시키지 못하였다. 하지만 Endocem Zr의 경우 ProRoot MTA나 RetroMTA에 비해 낮은 알칼리성과 높은 생활력을 보였다. This study compared the in vitro cell viability and differentiation potentials of human deciduous dental pulp cells (DPCs) on mineral trioxide aggregate (MTA)-like products (ProRoot MTA, RetroMTA and Endocem Zr). The experimental materials were prepared as circular discs, which were used to test the effects of the materials on the viability of human DPCs when placed in direct and indirect contact. Furthermore, the pH of the extracted materials was recorded, and their effect on cell differentiation potential was evaluated by evaluating the alkaline phosphatase (ALP) activity and Alizarin Red S staining of DPCs incubated with the test materials. In direct contact, the cell viability of human DPCs was higher with ProRoot MTA and RetroMTA than with Endocem Zr. However, when in indirect contact, the cell viability of human DPCs was generally higher in Endocem Zr than in ProRoot MTA and Retro MTA. With respect to pH, the alkalinity was lower for Endocem Zr than for the other test materials. The ALP activities of the cells were not enhanced by any of the experimental materials. Alizarin Red S staining of the tested human DPCs revealed that their differentiation potential was lower than for cells incubated with osteogenic induction medium. While there were differences in the responses of the human DPCs to the test materials, all displayed degrees of cytotoxicity and were unable to enhance either the viability or differentiation of human DPCs. However, Endocem Zr exhibited better cell viability and was less alkaline than the other test materials.
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읽기 학습 전략 훈련을 통한 초등학교 영어 학습 부진아의 초기 읽기 능력 향상 연구
이혜원(Lee, Haewon),임희정(Ihm, Hee-Jeong) 한국영어어문교육학회 2012 영어어문교육 Vol.18 No.2
This study aims to investigate the effects of learning strategy-based early reading instruction for English underachieving students. For this purpose of the study, sixteen learning strategies were driven from the review of previous related literature and the result of the survey conducted to the students and the teachers. Strategy integrated early reading instruction was implemented to nine students for thirteen weeks. The word recognition test was conducted before and after the instruction to examine whether the instruction had effects on the increase of their early reading skill. In addition, in order to investigate certain change in students’ affective aspects after the instruction. The research conducted survey to the students. A teacher’s field note and students’ class journal were also analyzed to verify the results from the quantitative test. The results indicated that the instruction led to the increase of students’ early reading skills. It was also found that the instruction motivated the underachieving students to devise a strategy for their learning process.
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김정은 시대 북한 보건의료체계 동향 전달체계와 조직체계를 중심으로
신희영 ( Shin Heeyoung ),이혜원 ( Lee Haewon ),안경수 ( An Kyeongsoo ),전지은 ( Jeon Jieun ) 서울대학교 통일평화연구원 2016 통일과 평화 Vol.8 No.2
기존 북한의 보건의료체계 특징은 무상치료제, 예방의학제, 의사담당구역제로 나눌 수 있었으나 장기간의 경제침체와 장마당을 통한 비공식적 보건의료체계의 확산으로 기존보건의료체계의 특징은 상당 부분 유명무실화 되었다. 이러한 상황 속에서 김정은 시대 들어 북한은 과학기술을 중시하는 정책을 수립하고 있다. 보건의료 분야에서도 대형병원 설립과 의학연구소, 의료품공장의 활발한 연구·생산 활동이 진행되고 있으며, 국가 차원에서 주도하여 국가조직인 보건성 조직체계도 쇄신을 꾀하고 있다. 본 연구는 북한의 공식 문헌과 관련자의 증언 등을 토대로 김정은 시대 보건의료체계 중 전달체계와 조직체계의 동향과 변화양상을 고찰하고 북한 보건의료 전달 및 조직체계의 정상화 및 공적 부문의 재건 노력을 분석한다. 이를 토대로 추후 남북 보건의료지원 및 협력을 준비할 때, 경로의 다양화와 전문화, 보건의료 개발협력 채널 구축의 확대 가능성을 살펴본다. 통일과 남북 보건의료 통합을 준비하는 연구자와 의료인의 입장에서, 현재 경색된 남북 관계는 통일을 준비하는 시각으로 봤을 때 위기임이 분명하다. 그러나 위기 속에서 기회를 찾을 수 있듯이 북한 보건의료체계의 내부 변화 상황을 면밀히 분석하여 이에 대응할 수 있는 다양하고 전문적인 남북 보건의료 개발협력 계획을 준비해야 할 필요가 있다. In Kim Jong Un era, North Korea began in earnest to establish a policy making with emphasis on scientific technology. In healthcare field, North Korea is building large scale hospitals and medical research institutions recently, and they are rebuilding an organizational system in Ministry of Public Health. North Korea has socialist states` strength characteristics including the medicine free of charge system, healthcare system which emphasizes a preventive medicine, and household doctors. These are nominal now because of long-term economic crisis and prevalence of a medical black market. In this circumstance, an unofficial medical system has been widened and general healthcare system has also been changed before Kim Jong Un era. Thus, we need to study on change of healthcare system in North Korea, and how this effects on quality improvement of public health. In addition, we need to examine a possibility of establishing a new cooperation and development channels and diverse routes with consideration for international assistance to North Korea. Finally, there should be studies on North Korea`s internal changes in healthcare system to prepare a plan for unification.
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북한 보건의료전략의 분석과 치과 분야에서의 적용 현황 고찰
정서연(Seoyeon Jung),주우찬(Woochan Joo),조재현(Jaehyun Jo),안경수(Kyeongsoo An),이혜원(Haewon Lee),최성호(Seong-Ho Choi),정회인(Hoi-In Jung) 대한치과의사협회 2020 대한치과의사협회지 Vol.58 No.9
In preparing for the era of Korean reunification, it is essential to consider the integration of medical systems and human resources. While Korean dental practitioners are expanding their activities in various fields both domestically and internationally, there are many restrictions on the activities for improving the health of North Korean people due to political and historical reasons even nowadays. In addition, there is little is known about the current state of dental health in North Korea. We analyzed the reports published by the World Health Organization (WHO) and the Ministry of Public Health of North Korea prepared individually or in cooperation, and investigated the current status of the health care strategy applied to the dental field by conducting a full investigation of the 2018 『Rodong』newspaper. Based on the above, we tried to grasp the major health care strategies in North Korea and their application. Understanding the direction and status of North Korea"s health care system would be an important cornerstone for international cooperation and practical activities to improve oral health care of North Koreans in the future. And there is a need that studies should be steadily conducted in various methods to overcome the heterogeneity of the two Koreas in the long-term perspective.
ScienceON
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