혈액 투석 환자에서 중심정맥 협착에 대한 스텐트 삽입술 : Wallstent Placement

임대승,노상필,이유선,정승현,김보영,이정우,강정아,김정희,이민수,정준용,최시완,정진옥,성인환,이강욱,신영태 충남대학교 의과대학 의학연구소 2002 충남의대잡지 Vol.29 No.1

Stenosis of central vein is a common complication arising after percutaneous subclavian vein catheter insertion performed for temporary vascular access in chronic renal failure patients undergoing hemodialysis. There are several treatment methods for the condition like percutaneous angioplasty(PTA), stent insertion, and surgery, but recent trend is toward PTA and stents. Among the patients diagnosed with chronic renal failure from March 1993 to May 2002 and undergoing hemodialysis through AV fistula, the 14 Patients in whom central vein stenosis arose were selected for the study. A total of 28 percutaneous interventions(5 PTA and 23 stent placement) were performed, and restenosis rate and the time taken till the restenosis in de novo lesions and instant lesions were compared. All 28 cases were operated successfully. The 14 cases that received both anigioplasty and stent placement initially. (de novo lesion : 14 cases), Among the 10 cases with de novo lesion that followed up more than 1 year, 3 cases are currently undergoing hemodialysis without restenosis, and the remaining 7 cases have recurred stenosis with the mean time to restenosis of 10.9 months. In the 7 cases in whom stenosis recurred, 11 interventions were done(instent lesion: 11 cases). 4 of these were using only ballon angioplasty with 100% restenosis rate and the mean time of 3 months until restenosis. The remaining 7 cases were using both balloon angioplasty and stent placement, also with 100% restenosis rate but with the mean time of 12 months until restenosis, which was later than the group receiving only balloon angioplasty. In treating the patients with central vein stenosis, stent placement seems to be more advantageous over PTA in terms of restenosis rate and the mean duration of patency. In the case of instent lesion, inserting the stent for the second time after stenosis recurred lengthened the duration of patency compared to performing balloon angioplasty alone.

대용섬유자원으로써 어저귀를 이용한 한지제조 (제2보) : 인피 및 목질부 섬유를 이용한 한지 제조 Manufacturing of The Hanjis Made from Bast Fiber and woody core fibers

정선화,조남석,최태호 한국목재공학회 2004 목재공학 Vol.32 No.1

생장속도가 빨라서 단위면적당 Biomass의 생산량이 많은 어저귀(Indian mallow, Abutilon avicennae G.)를 원료로 하여 펄프화하였으며, 제조한 한지의 물리적·기계적·현미경적 특성에 관하여 비교 검토하였다. 제조한 한지의 특성을 살펴보면 광학적, 강도적 현미경적인 특성에서 설포메틸 펄프화법이 우수한 결과를 나타냈고, 장섬유인 인피부 펄프에 대한 단섬유인 목질부 펄프의 혼입량 증가에 따른 변화에 있어 지질(밀도, 백색도, 불투명도, 지합)의 변화는 점차 증가했으나, 강도는 감소하는 경향을 나타냈다. This study was carried out to investigate the sheet properties of Indian mallow Hanji, made by different pulping methods, such as alkali and sulfomethylated pulpings, and different stock compositions, various mixing ratios of bast fiber and woody core fibers. Indian mallow hanjis made from the sulfomethylated pulps had higher brightness and sheet strength than the alkali pulps. It was found that the brightness of sulfomethylated pulp was enough high without an extra-bleaching. In the mechanical properties of Indian mallow hanjis mixed with bast fiber and woody core stalk pulps, the sheet strength were decreased as wood core pulps contents were increased. The sheet formation were increased as the increase of woody core pulps contents, while the sheet strength decreased Although the sulfomethylated pulping resulted in higher pulp yield, no morphological differences of fiber surfaces were shown as compared to the different pulping methods.

발 形態分析과 體能力間의 關係에 관한 比較硏究

崔鶴犧,鄭善太 진주산업대학교 1982 論文集 Vol.20 No.-

In order to enforce the test of the physical fitness by ages which is based on the classification of the foot by forms, I choosed 1096 male-students in J. high shool, and tried to analize to compare the normal foot to the physical test by forms. The results obtained in this study are following. 1. The number of the students of the foot by forms are following. The normal foot that students have is 869(79.28%), and the flat foot is 227(20.8%) 2. The record of the physical fitness test between the normal foot and the flat foot are following. The normal foot obtained more good results than the flat foot in 100 m sprit, in standing broad jumps, in ball throwing, in sit-up, and in pull-ups. 3. Upon investigation the record of the physical fitness test by ages between the normal foot and the flat, I found that 15 years old classes obtained more goods results than 16, 17years old classes in full-ups and in sit-ups.

血液型別 男女 體格과 體力檢査 成績 比較에 관한 硏究

최학의,鄭善太,丁光福 진주산업대학교 1981 論文集 Vol.19 No.-

In order to compare and analyze the result of the test for physique and strength by the type of blood, analysis was conducted to total numbers of 884 of boys girls high school, and as a result the following conclusion was obtained. 1. In the comparison of the result of the test for the physique by the type of blood, the more both the boys and girls who have the O type of blood are big in age the more the height is big in compared with other types of bloods, and for boys the result was revealt as the smallest, and on the centrary, for girls, it was revealt as big with similar result of the O type of blood. On the hand, for the weight, the circumference of the chest and the sitting height, both boys and girls by the type of blood and for the arcumference of the chest of boys who have the O type of bloods and of girls who have the AB type of bloods, it was revealt as little high in compared with the holders of other types of bloods Especially, for the sitting hight, the holders of the O type of bloods had the highest difference in the holders of the O types of bloods. 2. On the comparision of the result of test for physical strenght by the type of blood, the holders of the O type of bloods have shown the superior result in compared with the holders of other types of blood for all sorts of tests in exception of 100 race of boys who have the B type of bloods and sit ups of girls. Both boys and girls who have the A and B types of bloods have shown a lower difference than the O type of bloods which are of similar sesult on the whole, but the sesult for the AB type of blood has shown the lowest result. On the other hand, in case of girls, the more age is high the more the result is improved. But for 100 meter race and F.A.H. it was revealt that the result of the third grade of middle school was superior to that of high school. It seems to be caused from the result of must training for entering high school.

파노라마 방사선사진에서 하악관과 이공의 관찰되는 정도

정성진,최의환,김재덕 대한구강악안면방사선학회 2001 Imaging Science in Dentistry Vol.31 No.3

Purpose : To determine the head position that the superior border of the mandibular canal as well as mental foramen can be more clearly visualized in panoramic radiography Materials and Methods : Ten dry mandibles were radiographed bilaterally using PM 2002 CC panoramic machine. A 20 mm thick aluminium filter was added to the slit collimator to obtain radiographs with acceptable density. The specimens were tilted by 2, 4, 6, 8, and 10 degrees downward with and without radiopaque markers. Radiopaque markers were inserted into the mandibular canals and the mental canals of each side of the specimens to serve as reference image when assessing the radiographs. The visibility of the mandibular canal and the mental foramen was estimated by 4 observers on all radiographs. The obtained results were analyzed statistically. Results : Mandibular canals were significantly more clearly visible in the radiographs with 4 and 6 degree downward position on both sides (P〈0.05). Mental foramens were significantly more clearly visible in the radiographs with 4, 6, and 8 degree downward on right side and 6 degree downward on left side (P〈0.05). There was not significant difference between right and left sides. Conclusion : Panoramic radiographs with 4 to 6 degree downward tilting could be valuable in locating the mandibular canal as well as the mental foramen. (Korean J Oral Maxillofac Radiol 2001; 31 : 153-8)

컴포머에 대한 복합레진의 전단결합강도에 관한 연구

정송란,최남기,양규호,김선미,송호준 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.3

컴포머(compomer) 충전물이 파절될 경우 즉, 컴포머 수복이 실패했을 때 기존 컴포머의 파절된 부분(aged compomer)을 복합레진으로 수복해야 하는 경우를 고려해야 한다. 본 연구에서는 컴포머의 표면처리 방법에 따른 수리(repair)를 위한 복합레진과의 전단결합강도 변화를 알아보기 위해 두 개의 mold를 만들어서 Dyract AP, F2000를 컴포머 수복재료로, Z250을 수리용 복합레진 재료로 사용하여 컴포머와 레진을 부착시킨 시편을 제작하였다. 컴포머와 복합레진의 종류 조합, 본딩레진 사용유무, 열순환 처리 유무, 표면거칠기 부여 유무, 기존 수복물의 시효(aging)에 따라 10개의 군으로 나누어, 컴포머와 복합레진간의 전단결합강도를 측정하고 그 파절양상을 관찰하여 다음과 같은 결과를 얻었다. 1. 컴포머의 복합레진에 대한 전단결합강도를 측정한 결과, Dyract AP가 F2000 보다는 높은 전단강도 값을 보였으나 통계적으로 유의한 차이는 없었으며 (p>0.05), fresh 컴포머군이 aged 컴포머군보다 결합강도가 높았다(p<0.05). 2. 각 군간의 전단결합강도를 측정한 결과 Dyract AP에 접착제를 도포하고 Z250을 접착시킨 제 5군이 가장 높았으며, Dyract AP를 충전하고 1주일간 물에 보관한 후 건조시켜 표면을 roughening 한 후 Z250을 충전시킨 제 9군에서 가장 낮았다(p<0.05). 3. 열순환을 시행한 군이 시행하지 않은 군보다 전단결합강도가 낮게 나타났으나 통계적으로 유의한 차이는 없었다. 4. 각 재료들의 결합실패가 일어난 파절단면을 조직학적으로 관찰한 결과, 전반적으로 접착파괴를 보였으나, 접착제를 도포한 군에서는 응집파괴가 우세하게 나타났다. 이상의 결과 fresh 컴포머 위에 접착제를 도포한 다음 수리용 복합레진 재료를 사용함으로써 컴포머와 복합레진간의 결합력을 증가시킬 수 있음을 알 수 있었다. 그리고 fresh 컴포머 위에 복합레진을 즉시 충전한 경우가 높은 결합력을 얻을 수 있었다. Aged 컴포머와 복합레진간의 성공적인 결합력을 얻으려면 aged 컴포머의 표면을 mechanically roughening하고 접착제를 도포한후 복합레진을 충전해야 할 것으로 사료된다. For the purpose of comparing the bond strengths of compomers to composite resin, composite 2250, and two polyacid modified composite resin, Dyract AP and F2000, were selected and investigated using universal testing machine for measuring the shear bond strengths. Additionally, the failure modes were examined by observing the fractured surfaces of each specimen. The following results were obtained. 1. The shear bond strength of Dyract AP to Z250 were higher than those of F2000, but there was no statistically significant difference between group 1 and group 3(p>0.05), and groups using fresh compomers showed higher bond strength than those using aged compomers(p<0.05). 2. After measuring the shear bond strength of each group, it was highest in group 5 and was lowest in group 9(p<0.05). 3. Although there was no statistically significant difference, groups treated with thermocycling showed lower bond strengths than those of non-thermocycling groups. 4. Overall compomer/composite resin failures were adhesive. Cohesive failures occurred mainly in groups using bonding agent. Based on these results, the application of a bonding agent on fresh polyacid-modified resin composite increases the bond strength between polyacid-modified resin composite and composite resin. Additionally, the surface of aged polyacid-modified resin composite has to be roughened mechanically and a bonding agent has to be used in combination with composite resin.

부산시 고등학생들의 환경에 대한 인식정도와 영향요인 분석

최인영,윤성효,고정선 부산대학교 사범대학 과학교육연구소 2004 科學敎育硏究報 Vol.31 No.-

The purpose of this study was to identify the degree of recognition of the high school students about environmental and influential factors on it, selecting two regular schools and three vocational schools among the high schools in Busan area, questionnairing one class in the 10th, 11th, 12th grades of each school and analyzing the result. The result of analyzing the degree of knowledge, practice and recognition of seriousness concerning environment according to grade and gender is that the significant difference has been found in the degree of practice. The result of analyzing them according to maternal academic background is that the significant difference has been found in the degree of knowledge and a living standard and the style of housing have no effect on the environmental education, In the survey according to family style, it is shown that the students 'who live with their parents' recognize the seriousness of environment more. In the survey according to the experience of having the subject 'environment' in their school curriculum or not, it is shown that the significant difference has been found in the degree of knowledge. As the source of information on environment, mass media such as TV, magazines and newspapers have a great impact on the students. As the significant difference has been found in the degree of knowledge, practice, the recognition of seriousness from the viewpoint of the analysis on the survey according to the degree of the recognition on the necessity of the environmental preservation, it is shown that the more the students feel the necessity of environmental preservation, the higher the degree of knowledge, practice and recognition of seriousness on environment becomes, In the survey according to the kind of school, the significant difference has been found in the degree of knowledge, In the survey according to the degree of maternal concern on environment it is shown that the more concerns the mothers have, the more the students put what they learn into practice, In the survey according to the kinds of school, the significant difference has been found in the degree of knowledge. As the result of multiple regression analysis is summarized as below. 1. The variables influencing the environmental knowledge are the experience of having the class, 'environment', the recognition of the necessity of the environmental preservation and maternal academic background. 2. The elements influencing the degree of recognition of seriousness about environmental contamination are gender, the experience of having a class, 'environment' or not and the necessity of the environmental education. 3. The elements influencing the degree of practice are grade, information on environment, and maternal concern.

대용섬유자원으로써 어저귀를 이용한 한지제조(제1보) : 어저귀의 건물 생산량 및 펄프화 특성 Productivity and Pulping Characteristics of Indian Mallow

정선화,조남석,최태호 한국목재공학회 2002 목재공학 Vol.30 No.2

본 실험은 산림자원의 감소 예방과 지구의 환경보존을 위해서 생장이 빠르고 펄프원자재로 활용할 수 있는 비목재 섬유작물을 도입하는 것을 목적으로 하고 있다. 또한 부족한 한지의 원료인 닥나무를 수입하고 있는 실정에서, 국내에서 자생하고 있는 비목재섬유로 한지를 제조함으로써 수입대체 및 원가절감 등 일석이조의 효과를 거둘 수 있다. 이에 불량한 환경조건에서도 생육이 왕성한 어저귀(Abutilon avicennae G.)를 재배하여 그간의 진보된 펄프 제조기술을 적용하여 새로운 제지용 원료로 개발함으로써 부족한 원자재는 물론이거니와 국내 부존자원 이용의 극대화를 꾀하고자 실시하였다. 또한 폐기처리되는 농산물의 이용극대화를 꾀하기 위해 전목펄프화를 실시하였다. 그 결과 어저귀는 생장속도가 빠르고 수확기가 짧으며 집약적 재배 및 관리가 가능하여 단위면적당 최대의 수확량을 올릴 수 있었다. 어저귀 인피부의 섬유장은 2.4㎜로써 목재섬유 중 소나무와, 비목재섬유 중 케나프와 매우 유사한 결과를 보여주었고, 화학성분의 분석결과 어저귀 섬유는 추출성분의 함량이 높고 리그닌이 적은 것이 특징적으로 나타났다. 펄프화와 관련하여 인피부는 150℃에서 48∼57%, 전간부는 170℃에서 43∼51%의 높은 수율을 나타냈고, 설포메틸 펄프화법의 수율이 더 높게 나타났다. 펄프의 탈리그닌율도 두가지 펄프화법 모두 90% 이상의 높은 탈리그닌율을 나타내었다. Indian mallow is characterized by the rapid growth and high harvest of the fibrous materials. This study was carried out to investigate the sheet properties of Hanji using Indian mallow, made by different pulping methods, such as alkali and sulfomethylated pulpings and different stock compositions, various mixing ratios of bast fiber, woody core and whole stalk fibers. The results from this study were summarized as follows. The length and width of the bast fibers were 1.40∼4.30㎜(av. 2.35㎜) and 9.2∼26.4㎛(av. 18.3㎛), respectively. The cell wall thickness was 4.0∼11.5㎛(av. 7.7㎛). Runkel ratio, flexibility coefficient and fiber length/fiber width ratio were 1.38, 0.42 and 128 respectively. Bast fiber and whole stalk were cooked by alkali and sulfomethylated methods. Sulfomethylated pulping resulted in superior pulp in terms of yield and quality as compared with those of alkali pulping. The pulp yields of bast fiber was higher than those of whole stalk.

변위된 미맹출 상악 견치의 교정 치험례 : CASE REPORT

임혜정,최남기,김선미,양규호 大韓小兒齒科學會 2005 大韓小兒齒科學會誌 Vol.32 No.3

상악 견치는 가장 긴 치근을 가지며 저작기능과 함께 하악의 측방운동을 유도하고 심미적으로도 치열궁의 구각부위에 위치하여 교합관계의 조화와 대칭을 유지하는 등의 중요한 기능을 수행한다. 상악 견치는 발육기간이 가장 길며 형성되어 맹출하기까지 복잡한 경로를 갖기 때문에 다른 치아보다 매복의 빈도가 높다. 이러한 매복치를 치료하기 위해 임상의는 관찰을 하거나 외과적 노출과 교정적 견인, 자가치아이식, 발치 등 다양한 치료방법을 고려할 수 있다. 외과적 노출과 교정치료는 견치를 교합선상에 배치할 수 있기 때문에 가장 이상적인 접근으로 생각할 수 있다. 본 증례 보고는 구개측으로 매복된 상악 견치를 외과적 노출과 교정적 치아이동을 통해 기능적, 심미적으로 양호한 결과를 얻었다. The maxillary canine is especially important as it has the longest root, provides guidance for lateral movement of the mandible and masticatory function and is a key in esthetics due to its position. Maxillary canine has the longest time to develop and a complex route from the place of formation to the site of eruption, and so it is prone to impaction more than other teeth. The clinician should consider the various treatment options : (a) No treatment and observation, (b) surgical exposure and orthodontic traction (c) autotransplantation (d) extraction. Surgical exposure of the canine and orthodontic treatment to bring the tooth into the line of occlusion is considered the most desirable approach. This case presents the results of treatment for impacted maxillary canine by surgical exposure and orthodontic tooth movement.

상아질 접착제의 미세누출에 관한 연구

손정민,최남기,김선미,양규호,박지일 大韓小兒齒科學會 2008 大韓小兒齒科學會誌 Vol.35 No.4

본 연구는 여러가지 상아질 접착제들의 법랑질 변연과 상아질 변연에서의 미세누출을 비교 평가하기 위해 이루어졌다. 발거된 건전한 영구치의 협면과 설명에 5급 와동을 형성하고 형성된 50개의 와동을 무작위로 5개의 군으로 나누어 각군에 Adper™ Scotchbond™ Multi-purpose Plus Adhesive (SM; 3M ESPE. USA), Adper™ Single bond 2 (SB; 3M ESPE, USA), Clearfil™ SE Bond (SE; Kuraray Medical Inc., Japan), Adper™ Prompt™ L-Pop™ (PL; 3M ESPE, USA), G-Bond™ (GB; GC Co., Japan)를 적용하고 Filtec™ Z350 A3 (3M ESPE. USA)로 충전하였다. 시편을 37℃ 증류수에 24시간 보관한 후 5℃와 55℃에서 10초씩 1000회 열순환하고 2% methylene blue 용액을 24시간 넣어 염색한 뒤, 주수 하에 치아를 협설로 절단하여 색소의 침투 정도를 화상분석현미경을 이용하여 침투깊이를 측정한 뒤 각 군간의 미세누출 정도를 비교하여 침투깊이에 따라 0~3점으로 분류하여 다음과 같은 결과를 얻었다. 1. 범랑질 변연에서의 미세누출은 PL(0.85), SB(0.55), GB(0.50), SM(0.35), SE(0.25) 순이었으며 PL은 SM 및 SE와 통계학적으로 유의한 차이를 나타냈다(p<0.05). 2. 상아질 변연에서의 미세누출은 GB(2.10), SE(1.45), PL(1.40), SB(1.05), SM(0.70) 순이었으며 GB는 SB 및 SM과 통계학적으로 유의한 차이를 나타냈다(p<0.05). 3. 각 실험재료 군내에서 법랑질 변연에 비해 상아질 변연에서 미세누출이 더 크게 나타났으며, SE, PL, GB에서 통계학적으로 유의한 차이를 나타냈다(p<0.05). The objective of this study was to compare the microleakage of five adhesive systems in the enamel and dentin of permanent teeth. Class V cavity preparations with occlusal margins in enamel and gingival margins in dentin were prepared on both buccal and lingual surfaces of 25 extracted human molar teeth. The tested adhesives were: Adper Scotchbond Multi-purpose Plus Adhesive (SM), Adper Single bond 2 (SB), Clearfil SE Bond (SE), Adper Prompt L-Pop (pL) and G-Bond (GB). The results were as follows: 1. At the enamel margins, PL showed the highest leakage value(0.85), and others showed values of SB(0.55), GB(O.50), SM(O.35) and SE(0.25) in decreasing order. There were statistically significant differences in PL vs. SM and PL vs. SE(p<O.05). 2. At the dentin margins, GB showed the highest leakage value(2.10), and others showed values of SE(1.45), PL(1.40), SB(1.05), SM(0.70) in decreasing order. There were statistically significant differences in GB vs. SB and GB vs. SM(p<O.05). 3. Dentin margins showed high dye penetration rate than enamel margins in all material tested groups and there were statistically significant differences for SE, PL and GB.