전방경추부 응합술시 단피질 나사못과 양피질 나사못의 비교연구

박형천,윤승환,박현선,김은영 대한신경외과학회 1998 Journal of Korean neurosurgical society Vol.27 No.5

연령에 따른 한국인의 음향지표 변화와 특성

김형태,조승호,윤성문,선동일,김민식 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.1

호텔산업에서의 TQM 전략을 위한 품질 영향요인에 관한 연구

金炯郁,尹善姬 홍익대학교 경영연구소 1993 경영연구 Vol.17 No.-

Anti-idiotypic 항체가 Hybridoma 세포의 Anti-DNA 항체 합성을 조절하는 기전

박선,박정수,김형일,주민경,장영주,윤정구,김영태 아주대학교 의과학연구소 1996 아주의학 Vol.1 No.1

The regulatory mechanism of anti-idiotypic antibody(anti-id Ab) in the immune response is not fully understood. It has been reported that anti-id Ab suppresses Ab production of lymphocytes or hybridoma cells in vitro, but it does not affect the proliferation of cells or Ab secretion. We investigated whether or not polyclonal anti-id Ab regulates the production of anti-DNA Ab(lgG2a) in hybridoma cells. In addition, the effects of anti-id Ab on the proliferation of cells and on the transcription levels of lg genes were studied to elucidate the cellular and molecular mechanisms for regulation of anti-DNA Ab production in hybridoma cells. The treatment of hybridoma cells with anti-id Ab resulted in an increase in the number of cells producing anti-DNA Ab. However, there was no significant difference in the proliferation rate and mRNA levels of Ig genes between hybridoma cells treated with anti-id Ab, and those treated with normal rabbit serum. These results and our previous data suggest that the number of hybridoma cells producing anti-DNA Ab by anti-id Ab is not directly related with the rate of proliferation of the cells. Furthermore, it appears that the number of hybridoma cells producing IgG class anti-DNA Ab is increased by anti-id Ab, whereas the number of hybridoma cells producing IgM class anti-DNA Ab is down-regulated by anti-id Ab.

백서에서 Depulpin®과 Formocresol에 대한 치수와 치근단 조직의 반응

문형인,김선호,황윤찬,오병주,황인남,김선헌,정선와,윤창,오원만 大韓齒科保存學會 2002 Restorative Dentistry & Endodontics Vol.27 No.4

One fifth dilution of formocresol is usually for pulpotomy of the primary teeth and emergency pulpotomy of the permanent teeth. However, the use of formaldehyde has been subjected to criticism because it may be absorbed into the blood stream and become distributed systemically, it may also alter the pulp tissue rendering it immumologically active, and have carcinogenic potential. Recently Depulpin®(VoCo., Germany) gains popularity as a devitalizing agent during root canal therapy in spite of high concentration of 49% paraformaldehyde because it facilitate devitalization of pulp and make root canal therapy easier. But there have been not enough publications about the reaction of pulp and periapical tissue caused by Depulpin. This study was performed to evaluate the histological changes in pulp and periapical tissue of rats after pulpotomy using formocresol and Depulpin and to elucidate the toxic effects of these agents. Thirty six Sprague-Dawley rats were anesthetized by intraperitoneal injection of ketamine. Maxillary first molar teeth were used for pulpotomy with formocresol and Depulpin. Rats were sacrificed after 2 days, 4 days, 1 week, 2 weeks, 3 weeks and 4 weeks respectively. Specimens were histologically observed by light microscope changes in pulp and periapical tissue. The obtained results were as follows. 1. Formocresol group A zone of fixed tissue, in which odontoblasts could clearly be defined, was present directly underneath the pulpotomy dressing in almost all teeth of this group. This was followed by an area of necrotic tissue which resembled dried out fibrous tissue with no cellular detail except some pyknotic nuclei. In the specimens of after 2 days, 4 days, 1 week, 2 weeks in which vital tissue was present. it was separated from the fibrous area by a zone of inflammation. In the specimens of after 3 weeks and after 4 weeks, inflammatory infiltrate was in the periodontal ligament adjacent to the apical foramina of the teeth. 2. Depulpin® group The area of necrotic tissue which had no cells and fibers , was present adjacent to the dressing. This was followed by dried out fibrous tissue with no cellular details except some pyknotic nucleli. A short stump of vital pulp with odontoblasts was present at the end of the canal after 2 days. Inflammatory infiltrate was in the periodontal ligament after 4 days and after 1week. Severe root resorption and necrosis of periapical tissue opposite the root resorption site were defined after 2 weeks and after 3 weeks. Periapical lesion which consist of necrotic tissue surrounded by a fibrous connective wall. was found after 4 weeks. The results indicated that Depulpin can cause more adverse reaction to the dental pulp and periapical tissue than formocresol, and further studies are needed for its clinical use with safety.

STWS를 이용한 유도전동기의 토오크 전류측정용 관측기 설계에 관한 연구

심재선,임윤희,김민형 三陟大學校 1997 論文集 Vol.30 No.1

This paper propose a method, observer design for torque current measurement of induction motors, by using single term walsh series(STWS). If the torque currents of induction motors need to know for induction motors driving correctly, it is observed by proposed observer directly. Since the observer which is presented in this paper has an algebraic form, it is more attractive than the conservative others.

SCM 관점에서 접근한 구입자-공급자 파트너쉽 관계에서 운송자 역할에 관한 연구

金炯郁,尹善姬 홍익대학교 경영연구소 2001 경영연구 Vol.26 No.-

간접골성 고정원을 이용한 상악 구치부 원심이동 장치 종류에 따른 치아 이동 양상 평가

김수진,전윤식,정상혁,박선형 대한치과교정학회 2008 대한치과교정학회지 Vol.38 No.6

본 연구의 목적은 pendulum 장치, 미니임플란트를 동반한 pendulum장치(펜듈럼), 오픈코일 스프링 및 미니임플란트를 동반한 오픈코일 스프링 이용 시 각각의 치아이동 양상을 3차원적으로 분석하는 데 있었다. 상악 좌측 치조골 및 치아 모형을 제작하고, Calorific machine을 이용하여 모형상에서 대구치를 3 mm 원심이동시켰다. 실험은 5회씩반복 실시하였다. 모델을 전산화 단층 촬영한 후 V-Works를 이용하여 3차원 모델을 제작하였다. Rapidform상에서 3차원적으로 이동방향과 이동량을 계측하였고, 각각의 장치에 관한 통계적 유의성을 검정하였다. 교정용 미니임플란트를 간접 골성 고정원으로 이용하여 오픈코일 스프링으로 구치부를 원심으로 이동시켰을 때가 치체이동에 가장 가까운 이동양상을 보였고, 고정원 소실도 적게 나타났다 (p < 0.05). 오픈코일 스프링, 펜듈럼 장치 모두 미니임플란트를 부가적으로 이용했을 때 고정원 소실량이 적었다 (p < 0.05). 미니임플란트를 이용하지 않은 경우에는 두 장치의 고정원 소실량이 비슷하였다. 미니임플란트의 이용 여부와 관계없이 펜듈럼 장치로 상악 구치 원심 이동 시 오픈코일 스프링에 비해 제1대구치가 조절성 경사이동 양상으로 이동되었고 (p < 0.05), 제2대구치는 비조절성 경사이동 양상을 보였으며, 치관의 협측경사이동이 일어났다 (p < 0.05). 이와 같은 결과를 근거로 간접 골성 고정원을 이용한 오픈코일 스프링이 상악 구치의 원심 치체이동에 가장 효과적인 장치였으며, 펜듈럼 장치를 이용한 구치부 원심이동 시에는 추가적인 조절이 필요하다고 할 수 있다. Objective: The purpose of this study was to compare the three dimensional changes of tooth movement using four different types of maxillary molar distalization appliances; pendulum appliance (PD), mini-implant supported pendulum appliance (MPD), stainless steel open coil spring (SP) and mini-implant supported stainless steel open coil spring (MSP). Methods: These experiments were performed using the Calorific machine which can simulate dynamic tooth movement. Computed tomography (CT) images of the experimental model were taken before and after tooth movement in 1 mm thicknesses and reconstructed into a three dimensional model using V-works 4.0. These reconstructed images were superimposed using Rapidform 2004 and the direction and amount of tooth movement were measured. Results: The mean reciprocal anchor loss ratio at the first premolar was 17 - 19% for the PD and SP groups. The appliances using mini-implants (MPD or MSP) resulted in less anchorage loss (7 - 8%). On application of a pendulum appliance or MPD, distalization was obtained by tipping rather than by bodily movement. Furthermore, the maxillary second molar tipped distally and bucally. But on application of MSP, distalization was achieved almost by bodily movement. Conclusions: Regarding tooth movement patterns during molar distalization, stainless steel open coil spring with indirect skeletal anchorage was relatively superior to other methods.

유비쿼터스 환경에서의 맥진 시스템 설계 연구

양동일,박순희,김진봉,진광윤,최형진 강원대학교 정보통신연구소 2007 정보통신논문지 Vol.11 No.-

This research suggests service-infrastructure for a diagnosis and a prescription of oriental medicine in ubiquitous environment. A pulse is very important as a basic raw material in the field of oriental medicine. So, this research designs service-infrastructure making use of not a position information that is suggested previous but a pulse context information. A processing of a pulse-diagnosis system is proceeding like that is inputted a signal of user's pulse, diagnose and prescript through the analyzing and inferring that signal. A created signal is classified into 6, 'Bu, Chim, Ji, Sak, Heo, Sil', and they are classified into more specific items about each pulse. A classified pulse combines with another pulse and is possible for a diagnosis and inference of new symptoms. This research defines this model as OMPD-CAM(Oriental Medicine Pulse Diagnosis Context Aware Middleware), and designs a pulse context aware middleware.

NiTi scissors-bite corrector의 와이어 굵기에 따른 3차원적 치아 이동 양상

전현주,박선형,정상혁,전윤식 대한치과교정학회 2009 대한치과교정학회지 Vol.39 No.1

Objective: The purpose of this study was to compare the difference in three dimensional tooth movement using three different wire sizes (0.018 × 0.025-in, 0.016 × 0.022-in, 0.016-in) on a NiTi scissors-bite corrector. Methods: Computed tomography (CT) images of the experimental model before and after tooth movement were taken and reconstructed into three dimensional models for superimposition. The direction and the amount of tooth movement were measured and analyzed statistically. Results: The lingual and intrusive movements of the crown of the maxillary second molar were increased as the size of the NiTi wire increased. The roots of the maxillary second molars moved buccally except for the 0.016-in group. The intrusive movement of the roots of the maxillary second molars was increased as the size of the NiTi wire increased. Due to the use of orthodontic mini-implants, anchorage loss was under 0.2 mm on average. Conclusions: The 0.018 × 0.025-in NiTi wire was most effective in lingual and intrusive movement of the maxillary second molar which was in scissors-bite position. Indirect skeletal anchorage with a single orthodontic mini-implant was rigid enough to prevent anchorage loss. 본 연구에서는 NiTi scissors-bite corrector를 세 가지 서로 다른 굵기 0.018" × 0.025", 0.016" × 0.022", 0.016" 의 NiTi 와이어로 제작하였을 때 각각의 치아 이동 양상을 치아 이동 시뮬레이션 장치인 Calorific machine을 이용하여 3차원적으로 분석하고자 하였다. 가위교합에 이환된 상악 제2대구치 모형을 제작하고 제2소구치와 제1대구치 사이에 교정용 미니 임플랜트(orthodontic mini-implant)를 식립하여 제1대구치에 간접골성고정원을 설계하였다. 세 가지 굵기의 NiTi scissors-bite corrector를 부착하여 실험하였다. 치아의 이동 전후에 실험 모형은 computed tomography (CT)로 촬영하고 3차원 데이터로 변환하여 중첩하였다. 치아 이동 방향과 이동량을 계측하여, NiTi scissors-bite corrector 와이어 굵기에 따른 치아 이동 양상에 관한 통계적 유의성을 검정한 결과, 제2대구치 치관의 설측 이동량은 0.018" × 0.025"군(2.65 mm)이 가장 많았으며, 0.016"군(1.96 mm)과 통계적으로 유의한 차이를 보였다(p < 0.05). 제2대구치 치관의 압하량은 0.018" × 0.025"군(2.35 mm), 0.016" × 0.022"군(1.18 mm), 0.016"군(1.00 mm)으로 0.018" × 0.025"군이 나머지 두 군과 유의한 차이를 보였고 (p < 0.05), 치근의 압하량은 0.018" × 0.025"군(4.19 mm), 0.016" × 0.022"군(3.29 mm), 0.016"군(2.24 mm)으로 세 군 간 모두 통계적 유의차를 보였다 (p < 0.05). 치아의 이동 양상을 관찰한 결과, 0.016"군에서는 제2대구치 치근의 협측 이동이 나타나지 않았다. 간접골성고정원으로 사용된 제1대구치의 고정원 소실은 0.2 mm 이하로 나타났다. 이상의 결과를 토대로 0.018" × 0.025" NiTi 와이어로 제작한 NiTi scissors-bite corrector를 교정용 미니 임플랜트를 이용한 간접골성고정원과 함께 이용하였을때, 최소한의 고정원의 소실과 함께 가장 큰 상악 제2대구치의 설측 이동 및 압하가 일어났다고 할 수 있다.