외상성 흉·요추접합부 파열골절의 Kaneda 기구를 이용한 내고정술에 대한 임상적 검토 : Results of Anterior Decompression and Stabilization with Kaneda Device

장주호,김수한,정신,김재휴,강삼석,이제혁 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.4

The authors report clinical results of twenty-three traumatic thoracolumbar burst fractures treated by internal fixation with Kaneda device after anterior decompression during recent three years. Thoracolumbar injuries made up 28.9% of total spinal injuries and the burst fractures treated by anterior decompression and stabilization with Kaneda device constituted 19.0% of all spinal injuries. The burst fractures occurred most frequently at the age of twenties and thirties. The main causes of injury were fall and vehicle accident. Superior end-plate fracture type was most common according to the types of burst fracture. The first and the second lumbar vertebrae were frequently involved. No patient showed neurological deterioration after surgery. Conus medullaris lesions in burst fractures of the thoracolumbar junction have a high potentiality for functional recovery because the lesions are not due to discontinuity or severe crush injury but due to simple compression by bony fragments. The Kaneda device offered enough stability to enable early ambulation with good alignment and solid fusion.

동종 골수이식 후 만성 이식편대숙주질환과 동반된 그레이브스병

황호인,이제중,조상희,김여경,이병환,정익주,김형준 대한조혈모세포이식학회 2002 대한조혈모세포이식학회지 Vol.7 No.1

저자들은 중증 재생불량성빈혈로 동종 골수이식 및 추가적인 동종 말초혈액 조혈모세포이식을 시행 받은 후 만성 이식편대숙주질환이 발생하여 면역억제제로 조절되었으나 자가면역성 갑상선기능항진증이 병발한 1예를 경험하였기에 이를 보고하는 바이다. Chronic graft-versus-host disease (GVHD), which is a frequent complication following bone marrow transplantation (BMT), is characterized by fibrosis of the skin, liver, lungs, and gastrointestinal tract, immunodeficiency, and the production of autoantibodies. Endocrine dysfunction, in particular thyroid disease, has been described following BMT, but this has previously meant hypothyroidism secondary to total body irradiation or transfer of autoimmune hyperthyroidism from a donor with Graves’ disease rather than in association with chronic GVHD. We report a case of a 26-year-old man who developed Graves’ disease eight years after BMT and who had remission of chronic GVHD. He received an allogeneic BMT for severe aplastic anemia. Eighteen months after BMT, diarrhea and chronic GVHD developed and were treated with cyclosporine and steroid. Four years after ceasing the cyclosporine, the patient developed weight loss, palpitations, fever, and anterior neck swelling, and was diagnosed with Graves’ disease based on typical thyroid function tests. The signs and symptoms in the patient improved with propylthiouracil and propranolol.

土留構造物의 버팀과 Anchor 軸力에 關한 硏究

서정호,류제천,김송만,박춘수 충남대학교 산업기술연구소 2000 산업기술연구논문집 Vol.15 No.2

When SUNEX program was used to research for design axial force of strutting and anchoring for retention. In comparing to horizontal displacement and material force calculated elasto-plastic analysis that found following conclusion. 1)Increasing the initial axial force of strutting and anchoring for the retaining wall, the effect of wall displacement control become increase. 2)In the last stage of excavation, respectively, the reaction of strut and anchor, loading the initial axial force, increase in a linear. 3)Loading the initial axial force, bending moment is inclined to reduce, but the shearing force is increase. Therefore the safety of the cross section of wall have to be a fully assessment. 4)I propose the result in this study that the design axial force of strutting is "design load×(1-a), and the design axial force of anchoring is "design load×1.5×(1+a)". From the comparative study, I proposed the Design Axial Force of strutting and anchoring for retention. However further study is needed to verify in this value using another research and actual design.

연속슬래브교량의 고유진동해석에 대한 수치모형

박제선,심도식,이정호,정경일 江原大學校 産業技術硏究所 1997 産業技術硏究 Vol.17 No.-

The problem of deteriorated highway concrete slab is very serious all over the world. Before making any decision on repair work, reliable non-destructive evaluation is necessary. One of the dependable methods is to evaluate the in-situ stiffness of the slab by means of obtaining the natural frequency. By comparing the in-situ stiffness with the one obtained at the design stage, the degree of damage can be estimated rather accurately. In this paper, the numerical modeling of vibration analysis to three span continuous reinforced concrete bridge with elastic intermediate support is presented.

한국수출기업의 무역클레임관리에 관한 실증연구

최정호,이제현 서강대학교 경영학연구원 2004 서강경영논총 Vol.15 No.1

International trade claims in Korea have been brought up in the past 10 years in terms of various types as well as the number, which have been gradually increased in proportion to the growth of the trade volume. Since 1991, however, no attempt has been done for the study of claims under the changed international environments.The major purposes of this study are to investigate the relationship between the degree of identification of international trade claims and the characteristics of Korean export firms, and to analyze how effectively Korean export firms manage international trade claims. The major findings of this study are as follows: The more export-oriented Korean export firms are, the higher the degree of identification of international trade claims. The more frequent the international logistics · claims are, the higher the degree of identification of international trade claims. The more frequent the international logistics costs are, the higher the degree of identification of international trade claims. The more frequent the D/A or D/P export transactions are, the higher the degree of identification of international trade claims.

계승영구치가 선천적 결손된 유치의 치근 흡수

이정은,이제호,최형준,김성오,송제선,손흥규,최병재 대한소아치과학회 2009 大韓小兒齒科學會誌 Vol.36 No.4

유치의 정상적인 치근 흡수는 계승 영구치의 맹출 압력으로 단핵구 세포가 방출되어 파골세포로의 분화가 촉진되어 일어나며, 계승 영구치의 맹출 경로를 따라 유치의 치근이 흡수되어서 유치가 탈락하게 된다. 계승 영구치가 선천적으로 결손되었을 때에도 유치의 치근은 흡수될 수 있는데, 유치의 비정상적 치근흡수는 외상이나 염증, 교합압의 증가, 지지조직의 약화 등으로 발생할 수 있다. 치아의 선천적 결손은 인간에서 가장 흔한 발육이상이며, 영구치가 결손되었을 때 유치는 만기 잔존할 수 있다. 영구치의 선천적 결손은 전신질환이 있는 경우뿐만 아니라 국소적 원인이나 인류 진화에 따른 영향 등에 의해서도 발생한다. 이 증례들은 계승 영구치가 선천적으로 결손된 어린이에서 유치의 치근이 비정상적으로 흡수된 경우로 계승 영구치가 결손 된 유전치와 유견치, 유구치의 치근이 1/2 ~ 3/4정도까지 흡수 되었으며 흡수 부위는 불규칙적인 형태를 보였다. 원인으로는 흡수에 감수성이 높은 유치의 치주인대, 그리고 성장에 따라 증가되는 저작근육과 저작력, 혼합치열기에 유발되는 비정상적 교합 등을 생각할 수 있다. 계승 영구치가 결손된 유치가 비정상적인 치근 흡수를 보이는 경우에 유치는 유지될 수도 있지만, 여러 요인에 의하여 탈락될 경우에는 공간을 유지 할 것인지 판단해야 하며, 향후 보철치료나 교정치료를 요하므로 장기적인 치료계획을 수립해야 한다. Root resorption of primary teeth usually occurs as the succeeding permanent teeth erupt, which induces differentiation of the hemopoietic cells into osteoclasts. Their root resorption pattern reflects the eruption path of the succeeding permanent teeth, and eventually the primary teeth shed as their succeeding permanent teeth erupt. Even when a permanent tooth germ is congenitally missing, root resorption of the corresponding primary tooth may still occur due to various factors, such as inflammation, traumatic occlusal force, and weakness of periodontium etc. Such congenital missing of permanent teeth is a commonly observed phenomenon in human be ing, and it often accompanies delayed retention of primary teeth. The etiologic factors for congenital missing in elude not only systemic diseases, but also local factors and human evolution process. In the radiographs of the cases in this report, the primary teeth without succeeding permanent teeth show pathologic root resorption. Root resorption progressed about 1/2~3/4 of the roots, and the surfaces of the resorption area were irregular. Considering high susceptibility of the periodontal ligament of primary teeth to root resorption, pathologic root resorption of primary teeth with delayed retention can be explained by the increased masticatory muscle force and abnormal occlusion developed during the mixed dentition. When the primary teeth without succeeding permanent teeth are lost, decision for space maintenance is required and long-term treatment plan for further prosthetic or orthodontic treatment should be establsihed.

초음파 펄스에코 신호의 3차원 처리

송문호,손상락,조정호,성제중,안형근,장순재 한국비파괴검사학회 2003 한국비파괴검사학회지 Vol.23 No.5

비파괴 시험을 위한 3차원 구조의 초음파 영상에는 다양한 결함을 명백하게 보여줄 수 있을 만큼 상세하고 쉽게 알아볼 수 있는 정보가 제공되어야 한다. 수년 동안 원자력 발전소에서 사용된 금속관에 발견되는 소규모의 균열은 전형적인 결함들인데, 이러한 밀리미터 이하의 균열이나 결함은 최종 3차원 영상에서 묘사되어야만 의미있는 검사가 될 것이다. 향상된 선명도와 그에 따른 결함의 발견 과정의 한 단계로써, 펄스에코(pulse-echo) 초음파를 사용한 3차원 영상제작 기술을 제안한다. 이 기술은 필요한 스캐닝과 펄스에코 데이터의 처리과정을 통한 검사로 3차원 물체의 3차원 영상을 생성하는데, 2차원 위너필터(Wiener filter)에 의해 초음파 빔을 선명하게 하는 기술을 포함한다. 제안하는 위너필터는 빔의 전달에서 펄스에코 데이터를 초음파 빔 방향의 수직방향에 따라 필터링한다. 이 3차윈 처리과정은 결함의 선명성을 증진시키고 사용자에게 3차윈 구조물의 좌우 회전 및 축 회전과 같은 조작 능력을 제공한다. 이러한 조작 능력은 3차원에서 다양한 결함들의 크기와 위치의 분명한 묘사를 가능하게 한다. Infrasonic imaging of 3-D structures for nondestructive evaluation must provide readily recognizable images with enough details to clearly show various flaws that may or may not be present. Typical flaws that need to be detected are miniature cracks, for instance, in metal pipes having aged over years of operation in nuclear power plants; and these sub-millimeter cracks or flaws must be depicted in the final 3-D image for a meaningful evaluation. As a step towards improving conspicuity and thus detection of flaws, we propose a pulse-echo ultrasonic imaging technique to generate various 3-D views of the 3-D object under evaluation through strategic scanning and processing of the pulse-echo data. We employ a 2-D Wiener filter that filters the pulse-echo data along the plane orthogonal to the beam propagation so that ultrasonic beams can be sharpened. This three-dimensional processing and display coupled with 3-D manipulation capabilities by which users are able to pan and rotate the 3-D structure improve conspicuity of flaws. Providing such manipulation operations allow a clear depiction of the size and the location of various flaws in 3-D.

ICP(Inductively Coupled Plasma) 처리에 따른 n-type SiGe/Metal contact의 SBH(Schottky Barrier Height) 연구

김이곤,장호원,전창민,송영주,강진영,심규환,제정호,이종람 대한금속재료학회 2005 대한금속·재료학회지 Vol.43 No.2

The effect of surface treatment of n-type SiGe using the inductively coupled plasma (ICP) was studied by current-voltage and x-ray photoemission spectroscopy measurements. The ICP treatment produced surface oxides and point defects at the surface of SiGe. The x-ray photoemission spectroscopy measurements showed that atomic ratio of Ge/Si was increased after the etching treatment. These results provide the evidence that Si vacancies were produced at the etched surface. Si vacancies acting as donor for electrons resulted in shift of Fermi level to near the conduction band. As a result, Fermi level could be pinned at such Si vacancies, leading to the remarkable reduction of Schottky barrier height and the reduced dependence of Schottky barrier height on metal work function. (Received September 7, 2004)

암 생쥐에서 Testosterone으로 인한 유해감각예민도 둔화와 이에 대한 Naloxone의 차단효과

양구범,박제민,김명정,전명호,이국희 대한생물치료정신의학회 2000 생물치료정신의학 Vol.6 No.1

In order to examine the effect of testosterone on antinociception and the role of opioid system as an underlying mechanism, thirty-seven adult female mice(Institute of Cancer Research) were randomized to Naloxone(n=18) and Control group(n=19). Testosterone propionate(1mg/kg, ip) with naloxone HCL(2mg/kg, ip) or with normal saline(5ml/kg, ip) was administered on the first and the third experimental days. Nociceptive sensitivity was measured by Tail flick test(TFL, sec) before and after injection on the first and the third experimental days. The same dose of testosterone was injected on the second experimental day. The results were as follows; 1.TFL of control group was significantly increased by testosterone. TFL of control group measured on the first experimental day before and after injection were 5.5±1.1 sec(mean±sd) and 6.3±1.2 sec, respectively, and the change was significant(t=4.06, p=0.001). That measured on the third experimental day before injection was 5.9±1.0, showing a significant increase compared to that of the first experimental day(t=2.37, p=0.029). 2.Testosterone-induced antinociception was blocked by naloxone. In naloxone group, change in TFLs measured before(5.6±0.8) and after(5.3±0.9) injection was not significant on the first experimental day. On the third day, TFL measured before injection(6.6±1.2) was increased significantly than that of the first experimental day(t=2.87, p=0.011), but it decreased to baseline level after injection of naloxone(5.3±1.3; t=4.73, p=0.000). From these results, it is suggested that testosterone has antinociceptive effect, which is mediated by endogenous opioid system.

상악 전치부에 발생한 낭종성 치아종의 치험례

김효언,윤규호,전인성,신재명,한광홍,배정호 大韓顎顔面成形再建外科學會 2003 Maxillofacial Plastic Reconstructive Surgery Vol.25 No.1

Odontomas are odontogenic harmatomas which are composed of hard dental tissue. This lesion is composed of more than one type of tissue and, for this reason, has been called a composite odontoma. Odontogenic cysts are derived from epithelium associated with the development of the dental apparatus. Dentigerous cyst originated after the crown has been completely formed by accumulation of fluid between the reduced enamel epithelium and the crown. It also associated with crown of impacted tooth. Cystic odontomas are closely similar to dentigerous cysts clinically and radiologically. Treatment of choice is total removal(enucleation) or decompression(marsupialization). We represent two cases of Cystic odontomas with literature review in 69-year old male and 55-year old female occured in anterior maxilla. The leisions were successfully treated by marsupializaion.