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하악지에서의 하치조신경관 주행에 대한 Conebeam CT를 이용한 연구
김형우,권경환,민승기,오승환,지영덕,고세욱,이재환,온병훈,Kim, Hyong-Woo,Kwon, Kyung-Hwan,Min, Seung-Ki,Oh, Seung-Hwan,Chee, Young-Deok,Koh, Se-Wook,Lee, Jae-Hwan,Ohn, Byung-Hun 대한악안면성형재건외과학회 2009 Maxillofacial Plastic Reconstructive Surgery Vol.31 No.5
Objectives: This study was performed to evaluate course of the inferior alveolar canal in the mandibular ramus and to find safety zone when ramal bone is harvested. Patients and Methods: From January, 2009 to February, 2009, the 20 patients who visited in the Department of Oral and Maxillofacial Surgery, Sanbon Dental Hospital. Wonkwang University and the Conebeam CT was taken of various chief complaints, were selected. The patients who had left and right mandibular first molar and incisor missing, jaw fracture and bone pathology were excluded. The R point was defined as the point which occlusal plane was crossed to the mandibular anterior ramus(external oblique ridge). In the cross-sectional coronal and axial views, the inferior alveolar canal position to the R point, buccal bone width(BW), alveolar crest distance(ACD), distance from alveolar crest to occlusal plane(COD) and inferior alveolar canal to sagittal plane(CS) were measured and horizontal distance(HD), vertical distance(VD) and nearest distance(ND) were measured. Results: The inferior alveolar canal is located $6.19{\pm}1.21\;mm$ from the R point. Horizontal distance from the R point were $13.07{\pm}2.45\;mm$, vertical distance from the R point were $14.24{\pm}2.41\;mm$ and nearest distance from the R point were $10.12{\pm}1.76\;mm$. The course of the inferior alveolar canal was positioned within $0.61{\pm}0.68\;mm$. The distance from external buccal bone to the inferior alveolar canal was increased from the R point anteriorly. Conclusions: It is considered that the mandibular ramus from the R point to 10 mm anteriorly can be harvested safely at ramal bone grafting.
김현경 ( Hyun Gyung Kim ),김형우 ( Hyong Woo Kim ),김석환 ( Seok Hwan Kim ),윤유선 ( Yu Seon Yun ),이보희 ( Bo Hee Lee ),윤성로 ( Seong Ro Yoon ),김영수 ( Young Soo Kim ),윤선애 ( Sun Ae Yoon ),김영옥 ( Young Ok Kim ),원유동 ( Yoo 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.6
Purpose: Central venous stenosis or occlusion is commonly associated with placement of central venous catheters or devices. Although rare, central venous stenosis or occlusion may also develop without a history of previous central venous catheter placement. Here we report a case of central venous stenosis without a previous central catheter placement. A 76-year-old woman with hypertensive nephropathy was admitted due to deterioration of renal function. Tunneled cuffed catheter for hemodialysis was inserted in the right external jugular vein, and we intended to insert central venous catheter because of poorly functioning peripheral vein. But, left internal jugular vein was not cannulated. The patients had a history of pulmonary tuberculosis and chest x-ray revealed extensive calcified lesions mainly in left upper lung. Venography and CT angiogram showed complete occlusion at the confluent point of the left subclavian vein and left internal jugular vein, and left brachiocephalic vein by calcified lesion. The anterior cervical vein and jugular venous arch forming an anastomosis between the neck vein were marked dilated. The patient did not show any clinical symptoms and signs associated with central venous stenosis, and the central venous catheter functioned well, correction of central vein stenosis was not necessary. After the supportive care including temporary hemodialysis, the patient improved from renal dysfunction.
전인철,권대근,유대현,이준,오세리,김형우,민승기,Jeon, In-Chul,Kwon, Dae-Gun,Yoo, Dae-Hyun,Lee, Jun,O, Se-Ri,Kim, Hyong-Woo,Min, Seung-Ki 대한악안면성형재건외과학회 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.1
Eagle's syndrome occurs when an elongated styloid process or calcified stylohyoid ligament causes recurrent throat pain or foreign body sensation, dysphagia. It is supposed that this symptoms and signs are due to the compression of the styloid process on some neural and vascular structures. More uncommonly, symptoms such as dysphagia, tinnitus, and otalgia may occur in patients with this syndrome. It may also cause stroke due to the compression of carotid arteries. The compression depends on the size, shape, and orientation of the ossified styloid process Besides, degenerative or inflammatory changes in the tendinous portion of the styloid ligament insertion or rheumatic styloiditis may also cause this syndrome. Diagnosis can usually be made on physical examination by digital palpation of the styloid process in the tonsiller fossa. Three-dimensional computed tomography can utilized for supporting diagnosis. The treatment of Eagle's syndrome is primarily surgical. The styloid process can be shortened through an intraoral and extraoral approach. We report a 62-years-old man with the symptomatology of Eagle's syndrome and literature reviews.
보존적 치료를 통한 단방성 총상형 법랑모세포종의 치험례 :
최수진(Su-Jin Choi),지영덕(Young-Deok Chee),고세욱(Se-Wook Koh),김형우(Hyong-Woo Kim),최지연(Ji-Yeun Choi),이재환(Jae-Hwan Lee) 대한구강악안면외과학회 2008 대한구강악안면외과학회지 Vol.34 No.4
Ameloblastoma is the most common aggressive benign odontogenic tumor of the jaws. Because of slow growth and tendency to local invasion of bone and soft tissue, high rates of recurrence are common. The treatment for ameloblastoma is still controversial and poses some special problems in children. Because of growth of the jaw and the different incidence, prognosis of the tumor make the surgical consideration different from adults. Radical resection cause facial deformity, jaw abnormal movement and masticatory disturbance especially to child and adolescents. So conservative treatment as enucleation, curettage is acceptable initial treatment of ameloblastoma in children who can be followed up in a precise, detailed manner. This report describes a case of unilocular plexiform ameloblastoma treated by enucleation and curettage followed by marsupialization.
이민욱(Minuk Lee),박성재(Soung-Jea Park),여태경(Tae-Kyeong Yeu),김형우(Hyong-Woo Kim),홍섭(Sup Hong),조수길(Su-gil Cho),장준용(Jun-yong Jang),이태희(Tae Hee Lee),최종수(Jong-Su Choi) 대한기계학회 2012 大韓機械學會論文集A Vol.36 No.12
심해저 장비에 사용되는 압력용기는 내장된 전자장비를 대기압 상태로 보호할 수 있도록 설계되어야 한다. 따라서 해수에 노출되지 않도록 수밀성과 심해의 높은 압력을 견딜 수 있는 구조적 안전성을 확보해야 한다. 본 연구의 압력용기는 원통형이며, 중앙부의 원통형 용기와 양 끝단의 평판형 덮개부로 이루어져있다. 일반적으로 압력용기 내부 전자장비와의 통신 및 전력전송을 위해 압력용기 덮개판에 다양한 수중 커넥터를 배치 한다. 그러나 한정된 덮개판 공간에 다수의 홀이 배치되면 응력집중을 유발하여 압력용기 덮개판의 구조적 안전성에 영향을 줄 수 있다. 본 논문에서는 구조적 안전성을 고려한 압력용기 덮개판의 홀 배치 최적화 기법에 대한 연구를 수행하였다. A deep-sea pressure vessel needs to protect the internal electrical equipment from the high external pressure. Thus, the pressure vessel should be designed to be watertight and structurally safe. In this study, a cylindrical-type pressure vessel comprising a hollow cylinder and cover plates at both ends is investigated. For communication between the internal electronic equipment and the external device, holes are bored on the cover plate to install underwater connectors. Considering the type of internal equipment and underwater connector specifications, multiple holes may be required. These holes can affect the structural safety of the pressure vessel cover plate. In this study, the optimum design of the hole arrangement in consideration of the structural safety of the cover plate was performed.
파일럿 집광기의 전기·전자 시스템 설계를 위한 요구사항
박성재(Soung-Jea Park),여태경(Tae-Kyeong Yeu),윤석민(Suk-Min Yoon),김진호(Jin-Ho Kim),홍섭(Sup Hong),김형우(Hyong-Woo Kim),최종수(Jong-Su Choi) 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6
In this paper, we discuss about requirements of electrical and electronics system design for pilot miner. The pilot miner is one of the unique system as a kind of working ROV. We already developed test miner, MineRo, which verified the concept of manganese nodule miner. And we are now designing the pilot miner to examine the concept of commercial miner. The electrical and electronics system of pilot miner is more complex and larger than MineRo system. In the view of requirement engineering, system designers has many uncertainty and ambiguity in system functional definition. In order to reducing those facts, requirements are predetermined using requirement analysis process, so we could use this for having wide applications like design rules, manufacturing specifications and management manual, etc.