치과 임플랜트 인상코핑 및 인상재의 종류에 따른 주모형의 정확성에 관한 연구

김용재(Yong-Jai Kim),조인호(In-Ho Cho) 대한치과이식임플란트학회 1994 The Korean Academy of Implant Dentistry Vol.14 No.1

The passive fit between superstructure and implant constructed by accurate impression is one of the important factors for maintaining osseointegration of implants. The purpose of this study is to investigate the difference of the accuracy between direct method using squared impression coping and indirect method using tapered impression coping and that which method will be more useful in the clinics. The results were as follows. 1. None of the impression methods resulted in an absolutely passive fit. 2. The case of group 2 (squared impression coping + Impregum) demonstrated the closest mean strain values recorded on the master cast. 3. No statistically significant difference was found between direct and indirect method. 4. The group using polyether impression material resulted in closer duplication of the mastet cast than using alginate and the group using alginate with a large standard deviation is considered an unstable method (p<C0.05). 5. In case of group 2, the force of about 40 N showed to be inflicted on implant and further research about the effect of constant force of the magnitude found in this study is needed.

조선 후기 통영 충렬사의 방문자와 향사 주체

김용재(Yong-Jai Kim) 순천향대학교 이순신연구소 2023 이순신연구논총 Vol.- No.39

Whenever the country is in trouble or in crisis, the name of “Yi sun-shin” is always summoned and illuminated. because it is widely known as the best master who saved Joseon. Since Yi Sun-shin's achievements are largely recognized by the public and society, research on him is being actively conducted in various fields. Despite this social trend, there are few studies related to shrines that commemorate Yi Sun-shin and hold ancestral rites. Recognizing the current lack of research, this paper attempted to analyze visitors, tributes, and butlers using 『Simwonrok』, which is owned by Tongyeong Chungnyeolsa. As a result, first, it was confirmed that the status of Tongyeong Chungryeolsa changed from the enshrinement of 『Yi Chungmu-gong's book』 in the aspect of visitors to Tongyeong Chungryeolsa. This shows a major change in the mind and national rites of the controller, starting with the enshrinement of the 『Yi Chungmu-gong's boo k』 in the Tongyeong Chungnyeolsa's 『Shimwonrok』. The publication of Jeongjo's 『Yi Chungmu-gong's boo k』 and the enshrinement of Tongyeong Chungnyeolsa raised the status of Tongyeong Chungnyeolsa. Tongyeong Chungnyeolsa has a nationwide status with 237 houses, so naturally, the visits of Yi Sun-shin's descendants did not stop. Second, Tongyeong Chungryeolsa is the official shrine of Tongjeyeong Navy Headquarters, and chief-control officer participated as a chief-priest during the Spring and Autumn national rite. It was confirmed that the chief-control officer was the shrine that created the most authoritative and officially managed by the state by performing the super-constitutional government. It was also confirmed that the butler was gradually converted from a central military officer to a resident military officer. This status of Tongyeong Chungryeolsa served as a strong foundation for Tongyeong Chungryeolsa to survive for 400 years after the 39th year of King Seonjo's reign (1606) even in a situation where other Yi Sun-sin shrines were abolished when Daewon-gun demolished. 나라가 어렵거나 위기에 처할 때마다 ‘이순신’의 이름이 늘 소환되어 조명되곤 한다. 이는 조선을 구한 최고의 명장으로 널리 알려져 있기 때문이다. 이순신의 업적은 대중과 사회가 인정하는 바가 크기에 그에 대하여 다방면에서 연구가 활발하게 이루어지고 있다. 이러한 사회적인 추세에도 불구하고 이순신을 추모하고 제향 지내는 사당과 관련한 연구가 현재 거의 없는 편이다. 본고에서는 연구가 현재 부족한 상황을 인식하여 통영 충렬사 소장 『심원록(尋院錄)』을 활용하여 방문자와 제향의 주체인 헌관과 집사에 대해 분석하고자 하였다. 그 결과 첫째, 통영 충렬사의 방문자 양상에서 『이충무공전서』의 봉안을 기점으로 통영 충렬사의 위상이 달라졌음을 확인하였다. 통영 충렬사 『심원록』에는 『이충무공전서』 봉안을 기점으로 통제사의 심원과 제향에 큰 변화를 보인다. 정조의 『이충무공전서』 발간 및 통영 충렬사의 봉안은 통영 충렬사의 위상을 격상시켰다. 통영 충렬사는 237개 성관이 찾을 정도로 전국적인 위상을 갖추다 보니 자연스럽게 이순신 후손의 방문도 끊이질 않았다. 둘째, 통영 충렬사는 통제영의 공식 사당으로 춘추 제향 때 통제사가 초헌관으로 참여하였다. 통제사가 초헌관을 수행함으로 가장 권위 있고 국가가 공식적으로 관리하는 사액 사당임을 확인하였다. 집사는 중앙에서 파견한 군관에서 점차 재지 군관으로 전환되는 점도 확인할 수 있었다. 이러한 통영 충렬사의 위상은 대원군의 서원 훼철 시 다른 이순신 사당이 철폐되는 상황 속에서도 통영 충렬사가 선조 39년(1606) 이후 400여 년 동안 존속할 수 있는 든든한 기반이 되었다.

인간의 갑상선 결절성 과증식증과 유두상 암종에서의 Endothelial Nitric Oxide의 발현

김영모(Young Mo Kim),조정일(Jung Il Cho),김용재(Yong Jai Kim),양태용(Tae Yong Yang),김대형(Dae Hyung Kim),박창신(Chang Sin Park),한창준(Chang Jun Han) 대한두경부종양학회 2001 대한두경부 종양학회지 Vol.17 No.2

Background and Objectives: Nitric oxide (NO) is generated in mammalian tissue by the conversion of L-arginine to L-citrulline. This reaction is catalyzed by nitric oxide synthase (NOS). NO is an important bioactive agent and a signalling molecule that mediates a variety of biologic actions such as vasodilation, neurotransmission, host defense, and iron metabolism but increased NO production may also contribute to the pathogenesis of a various of disorders, including cancer. Before now, the role of NO in thyroid gland is still investigated and it was supposed that NO mediate the angiogenesis in tumor growth. Others journal and works identified the expression of iNOS that involve by neutrophil and eNOS that involve in part in the vascular remodeling and to understand the role of NO in human thyroid gland. But authors revealed only eNOS in thyroid neoplasm. iNOS was identifed by inflammation in fault. Materials and Methods: Western blot analysis was performed, using a polyclonal antibody against eNOS (Rabbit polyclonal IgG). Using the same antibody, the distribution of eNOS was examined in 15 formalin-fixed paraffin embedded samples by immunohistochemistry. By NADPH consumption rate, NOS activity was estimated at nodular hyperplasia. Results: Western blot analysis exhibited that eNOS was significantly elevated in thyroid papillary carcinoma, compared to that in nodular hyperplasia and normal tissue. Immunohistochemistry showed that the immunoreacitivity was present more significantly in thyroid follicular epithelial cell layer than vascular endothelial cell. NOS activity increased in nodular hyperplasia. Conclusions: Thyroid papillary cancer without neutrophil invasion expressed only eNOS. The endothelial localization of eNOS may play an important role in pathogenensis of human thyroid nodular hyperplasia and the follicular localization of thyroid papillary carcinomas.

핵의학과 종사자의 방사성동위원소 체내오염 측정

정규환,김용재,장정찬,이재기,Jeong, Gyu-Hwan,Kim, Yong-Jae,Jang, Jeong-Chan,Lee, Jai-Ki 대한핵의학기술학회 2009 핵의학 기술 Vol.13 No.3

본 논문에서는 국내 의료기관 종사자 중 핵의학과 종사자 일부를 선정하여 방사성동위원소에 의한 체내오염 여부와 정도를 정량적으로 측정한 후 그 결과에 근거하여 선량을 평가하였다. 선량평가를 위해 서울시내에 소재하는 대형병원 3곳의 핵의학과 종사자 25명을 측정 대상자로 선정한 후 각 개인의 소변시료를 채취하여 측정하였다. 시료는 주 1회 채취하였으며 종사자에 따라 6~10회에 걸쳐 각 회당 100~200 mL 정도의 양을 채취한 후 고순도게르마늄반도체검출기를 사용하여 시료를 측정 하였다. 측정된 결과에 근거하여 방사성동위원소의 섭취량을 평가하였고 예탁유효선량을 평가하는 도구로 IMBA 전산프로그램을 사용하였다. IMBA 프로그램으로 평가가 불가능한 반감기가 매우 짧은 $^{99m}Tc$, $^{123}I$ 등과 같은 핵종에 의한 선량은 국제원자력기구에서 권고하는 방법을 적용하여 선량을 평가하였다. 채취한 소변시료를 대상으로 방사성핵종을 계측, 분석한 결과 $^{99m}Tc$, $^{123}I$, $^{131}I$, $^{201}Tl$ 핵종 등이 검출되었고 양전자방출단층 촬영에 사용되는 $^{18}F$ 핵종도 검출되었다. 계측된 결과로부터 평가된 예탁유효선량은 0~5 mSv의 분포를 보였으나 대부분 1mSv 미만으로 나타났다. 1 mSv를 초과한 종사자는 모두 3명으로 이들 모두는 선원의 분배와 취급에 직접적으로 참여한 종사자들이었고 간호사의 경우 1 mSv를 초과한 사람이 한 사람도 발생하지 않았다. 그러나 보다 정확하고 상세한 결과를 도출하기 위해서는 계절적 요인을 구분하기 위한 장기적인 연구가 필요하며 측정대상자의 수를 확대할 필요가 있을 것으로 판단된다. 현재로서는 대부분의 핵의학과 종사자들은 방사성 핵종에 의한 체내오염 정기 감시를 실시할 필요가 없을 것으로 여겨지며 그에 따른 방사선학적인 건강상의 영향도 우려할 필요가 없는 것으로 판단되지만 불필요한 소량의 피폭이라도 줄이기 위해서는 주기적으로 작업환경을 측정하거나 공기 중 방사성핵종 농도 감시를 가능한 한 자주 실시하는 것이 바람직 할 것으로 판단된다. Purpose: We tested a sample of nuclear medicine workers at Korean healthcare institutions for internal contamination with radioactive isotopes, measuring concentrations and evaluating doses of individual exposure. Materials and Methods: The detection and measurement was performed on urine samples collected from 25 nuclear medicine workers at three large hospitals located in Seoul. Urine samples were collected once a week, 100~200 mL samples were gathered up to 6~10 times weekly. A high-purity germanium detector was used to measure gamma radiations in urine samples for the presence of radioactive isotopes. Based on the detection results, we estimated the amounts of intake and committed effective doses using IMBA software. In cases where committed effective doses could not be adequately evaluated with IMBA software, we estimated individual committed effective doses for radionuclides with a very short half life such as $^{99m}Tc$ and $^{123}I$, using the methods recommended by International Atomic Energy Agency. Results: Radionuclides detected through the analysis of urine samples included $^{99m}Tc$, $^{123}I$, $^{131}I$ and $^{201}Tl$, as well as $^{18}F$, a nuclide used in Positron Emission Tomography examinations. The committed effective doses, calculated based on the radionuclide concentrations in urine samples, ranged from 0 to 5 mSv, but were, in the majority of cases, less than 1 mSv. The committed effective dose exceeded 1 mSv in three of the samples, and all three were workers directly handling radioactive sources. No nurses were found to have a committed effective dose in excess of 1 mSv. Conclusions: To improve the accuracy of results, it may be necessary to conduct a long-term study, performed over a time span wide enough to allow the clear determination of the influence of seasonal factors. A larger sample should also help increase the reliability of results. However, as most Korean nuclear medicine workers are currently not necessary to monitored routinely for internal contamination with radionuclides. Notwithstanding, a continuous effort is recommended to reduce any unnecessary exposure to radioactive substances, even if in inconsequential amounts, by regularly surveying workplace environments and frequently monitoring atmospheric concentrations of radionuclides.

심한 비중격만곡을 동반한 외비변형 환자에서의 전비중격재건술을 이용한 외비성형술

장태영,김용재,박승원,정동학 대한이비인후과학회 2001 대한이비인후과학회지 두경부외과학 Vol.44 No.6

코성형술시 사용된 삽입물의 생태학적 변화

정동학,박선기,이철우,김용재,장태영,이명택,민수기 대한이비인후과학회 2001 대한이비인후과학회지 두경부외과학 Vol.44 No.2