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Nam, Kwang-Woo,Chang, Myung-Woo,Chang, Bok-Sook,Han, Dong-Hoo,Shim, June-Sung,Chang, Ik-Tae,Heo, Seong-Joo,An, Jung-Ho,Chung, Dong-June The Korean Academy of Prosthodonitics 2000 대한치과보철학회지 Vol.38 No.6
The mainly used polymeric material for the denture is PMMA because of its cost and easiness to handle. So it was widely used material among dentists for past decades. But the acrylic-based denture materials have several common weak points such as shrinkage after curing and lack of strength. In order to solve these problems, we adapted one of hybrid system using acrylic polymer and vinyloligosilsesquioxane(POSS). POSS, which is a well known expandable monomer during polymerization process, may eventually suppress volumetric shrinkage. And the hybrid system makes it possible for the polymer to be stable in various severe conditions. Eight different kinds of samples were designed and synthesized. Each samples were characterized with dynamic mechanical analyser(DMA) to confirm their thermodynamic properties, fractured to analyze the cross-sectional morphology of the samples. And elongation, flexural and impact tests were also executed to evaluate the mechanical properties of the samples. From the results, hybrid composites had well defined crosslinked network structure compared to the widely used denture materials, and the mechanical strength improved without changing any surface condition as increment with POSS ratio in hybrid system. Fractured morphology showed homogeneous surfaces in spite of mutli component system, therefore we can conclude that the adoption of the POSS brought the reinforcement of the denture resin.
세라믹 메탈할리이드 램프의 전자식 안정기 구동을 통한 전기적 광학적 특성에 관한 연구
金南君(Nam-Goon Kim),梁種璟(Jong-Kyung Yang),李主?(Joo-Hoo Lee),張赫晉(Hyeok-Jin Jang),朴大熙(Dae-Hee Park) 대한전기학회 2008 전기학회논문지 Vol.57 No.12
The use of arc tubes made of ceramic material further enhanced some of the metal halide lamp's properties. These properties translate into higher efficacy with better color rendering, stable color through lamp long life. Recently, due to an increase in the application of the ceramic metal-halide lamp, the study for the property etc. according to Ballast's driving scheme and the study for arc tube material, optimization of gas and so on are being proceeded to improve the property of the lamp. Especially, to control ceramic metal-halide lamp, the vigorous study and practical use with respect to Electronic Ballast, which has been improved in the disadvantages of the conventional Magnetic Ballast are made. In this paper, Electrical, optical and thermal characteristics are analyzed by comparing magnetic ballast with electronic ballast.
Gemcitabine Therapy in Patients with Advanced Pancreatic Cancer
( Young Joo Min ),( Kwang Ro Joo ),( Neung Hwa Park ),( Tae Kwon Yun ),( Yang Won Nah ),( Chang Woo Nam ),( Jae Hoo Park ) 대한내과학회 2002 The Korean Journal of Internal Medicine Vol.17 No.4
Background: Advanced, unresectable pancreatic cancer is an extremely aggressive disease. The 5-year survival rate for pancreatic cancer is only less than 5%. Current therapeutic options for patients with locally advanced or metastatic disease are limited.
박후섭 ( Hoo Seob Park ),남해성 ( Hae Sung Nam ),최유경 ( Yu Kyoung Choi ),송은주 ( Eun Joo Song ),황수정 ( Soo Jeong Hwang ) 한국치위생과학회 2011 치위생과학회지 Vol.11 No.2
본 연구는 대전 양치교실사업의 2년 6개월경과 시점에서 구강병 예방효과를 추구조사연구로 보고자 하였다. 조사대상은 2008년부터 2010년 5월 현재 양치교실이 설치되어 있는 대전 동구 D초등학교 5학년 학생 70명을 실험군으로 선정하였으며 대조군으로는 지리적, 경제적 상태, 학교 규모가 비슷할 것으로 예측되며 학교장의 협조를 얻을수 있었던 대전 동구 S초등학교 5학년 학생 70명을 선정하였다. 조사방법은 구장검사로 치면세균막검사, 치아우식증검사를 양치교실 경과 6개월 시점, 18개월 시점, 30개월 시점에 실시하였으며, 30개월 시점에서는 치은지수검사, 치은열구액 수집을 추가하여 치은열구액 내 MMP-9 을 분석하였으며, 구강보건지식도 및 행위 도를 분석하였다. 1. 치아우식증 관련지수에 있어서 2년 6개월 경과함에 따른 양치교실군과 대조군의 유의한 차이가 없었다. 2. 치면세균막지수는 양치교실군이 대조군에 비해 유의하게 낮았다. 3. 치주질환 관련지수인 치은지수, 치석지수는 양치교실 군과 대조군의 유의한 차이가 없었다. 4. 치은열구액 내 MMP-9의 농도에 있어서 양치교실군이 대조군에 비해 낮았으나 유의한 차이가 없었다. 5. 구강보건지식에 있어서 양치교실군이 대조군에 비해 지식상태가 높은 것으로 나타났다. 6 구장보건행위도, 1일 잇솔질 횟수, 교내 양치도구 준비에 있어서 양치교실군과 대조군의 유의한 차이가 없었다. 결론적으로 양치교실사업에 있어 치연세균막제거의 효 과는 검증할 수 있었으나 치아우식증예방 치주질환예방효과는 불분명하며 행위도나 양치도구 구비 여부를 보았을 때 현재 대전 D초의 양치교실사업이 효율적으로 운용되고 있지 않은 것으로 판단되기 때문에 양치교실사업의 효과를 보기 위해서는 양치교실 설치 뿐 아니라 적절한 응용프로그램과 운용에 대한 책임 소재, 학교측과 학부모의 관심이 있어야 할 것으로 사료되었다. The aim of this study was to investigate the prevention effect of oral disease on the school-based toothbrushing program(SBTBP) in Daejeon in 30 months. The experimental subjects were the 5th grade`s 70 students who have gone to school with the school-based toothbrushing program since the 3th-grade. The control school was located in close geographical area with similar economical status. The questionnaire about oral health knowledge and behavior was done by self-recording. After one dentist examined the dental caries and periodontal status, the gingival crevicular fluid(GCF) was collected with #25 paperpoint for 1 miniutes. Matrix Metalloproteinase(MMP)-9 in GCF was analyzed by ELISA. The SBTBP group had the upper oral health knowledge than the control significantly(p<0.001), but, the SBTBP group had no difference of the oral health behavior from the control. Although the SBTBP group had the lower plaque index than the control significantly(p=0.02), the SBTBP group had no difference of the gingival index, calculus index and the concentration of MMP-9 in GCF from the control. In conclusion, The SBTBP had the effect to reduce the dental plaque and to improve the oral health knowledge. On the other hand, the effect to prevent dental caries and periodontal disease of SBTBP was not clear.
이동후(Dong Hoo Lee),이민호(Min Ho Lee),기춘석(Chun Suhk Kee),최호순(Ho Soon Choi),한동수(Dong Soo Han),윤병철(Byung Chul Yoon),이창범(Chang Beom Lee),이오영(Oh Young Lee),박경남(Kyoung Nam Park),손주현(Joo Hyun Sohn),함준수(Joon Soo 대한소화기학회 1997 대한소화기학회지 Vol.29 No.2
Ulcerative colitis is a chronie inflammatog disorder of unknown cause, which primarily involves the eolonic mucosa. There is increased incidence of carcinoma in patients with uicerative colitis. The major independent factor for coloreetal cancer in patients with ulcerative colitis is duration of disease, extent of involvement, and onset of age. We report two cases of colon cancer which arose in patients with a long history of ulcerative colitis, A 52-year-old house wife was admitted due to bloody diarrhea. She had a 10 years history of ulcerative colitis with pancolitis. The pathologic specimen shows multicentric cancer in rectosigrnoid region and proximal ascending colon with histologic features of mucinous adenocarcinoma. She died of cancer recurrence in the rectum 13 months later. Seeond case is a 62-year-old woman who presented with diffuse abdominal pain. She had a 6 year history of ulcerative colitis with pancolitis. Right hemicolectomy was done. Pathologic specimens showed adenocarcinoma with crypt abscesses and mild dysplasia in the adjacent cecal mucosa. After chemotherapy, she is still alive without complication. (Korean J Gastroenterol 1997; 29:259 - 266)
간문맥 혈전을 동반한 Alpha-Fetoprotein 분비 췌장 선암
이동후(Dong Hoo Lee),박경남(Kyung Nam Park),이민호(Min Ho Lee),기춘석(Chun Suhk Kee),박문향(Moon Hyang Park),한동수(Dong Soo Han),윤병철(Byung Chul Yoon),이오영(Oh Young Lee),손주현(Joo Hyun Sohn),함준수(Joon Soo Hahm),고병희(Byung H 대한소화기학회 1997 대한소화기학회지 Vol.29 No.5
A 39-year-old male with alpha-fetoprotein (AFP) producing pancreatic adenocarcinoma is reported. Abdominal ultrasonography, computed tomography and magnetic resonance imaging showed a tumor extending from head to tail of the pancreas and portal vein thrombi. Neoplastic cells were confirmed by fine needle aspiration cytology from pancreas head mass and portal vein thrombus. Immunohistochemical stainings for a -fetoprotein and a 1-antitrypsin showed a strong reactivity in the neoplastic cells. We report this case with a review of the literature. (Korean J Gastroenterol 1997; 29: 699-705)
박경남,이민호,최호순,이동후,손주현,기춘석,함준수,전용철,이웅수,손영우,윤병철,윤경택 대한소화기학회 2000 대한소화기학회지 Vol.35 No.4
Eosinophilic gastroenteritis is a rare disease of unknown cause and presents with tissue eosinophilia, which can involve different layers of gut wall and show different gastrointestinal symptoms according to the invaded lesion or layer without parasitic infestation. A pathologic and clinical classification of eosinophilic gastroenteritis is based on the predominent layer of the gut wall involved. Serosal involvement is observed in the rarest form that is associated with eosinophilic ascites and dramatic steroid response. A 15-year-old woman with lower abdominal pain visited our hospital. She had a peripheral blood eosinophilia and moderate amount of ascites that is mainly composed of eosinophils. Small bowel series showed diffuse mucosal thickening from the duodenum to the ileum. We diagnosed the case as eosinophilic enteritis with ascites on the basis of clinical, laboratory, radiologic findings. She was treated with corticosteroid and responded rapidly with a complete resolution of ascites and the abdominal pain.
박은주,박경남,이용욱,이민호,조윤주,최호순,이동후,손주현,함준수,손영우,은창수,전용철,기춘석,윤병철,유정수 대한소화기내시경학회 2000 Clinical Endoscopy Vol.20 No.1
Pancreatic pseudocysts are a well-recognized complication of pancreatitis. Most occur in or adjacent to the pancreas. Occasionally, duodenal involvement may occur due to the nonperitonealized posterior surface of the duodenum is in direct contact with the head of the pancreas. But there is little awareness of the intramural and major extrinsic involvement of the duodenum with also occurs. A case was recently experienced involving an intramural pancreatic pseudocyst of the duodenum.