Gore-Tex를 이용한 진구성 전방 십자 인대 손상의 치료

김엽(Yeub Kim),김기수(Ki Soo Kim),김성택(Seung Taek Kim),고승희(Seung Hee Ko),송준영(Jun Young Song),정종균(Jong Kun Chung) 대한정형외과학회 1992 대한정형외과학회지 Vol.27 No.5

정량적인 선박 의장시스템 신뢰성 평가를 위한 Dynamic fault tree 작성 및 Bayesian network로의 변환

김성택(Kim, Sung-teak),김현승(Kim, Hyeon-seung),오유택(Oh, Yu-taek),정소연(Chung, So-yeon),양영순(Yang, Young-soon) 한국해양환경·에너지학회 2012 한국해양환경공학회 학술대회논문집 Vol.2012 No.5

선박 의장시스템은 선박에 필요한 다양한 기능을 제공하기 위해 선박 전체에 배치되어 사용된다. 선박 의장시스템이 고장으로 인해 이러한 기능을 할 수 없게 될 경우, 선박 전체의 운항에 영향을 끼쳐 인명이나 환경에 피해를 입힐 수 있는 사고가 발생하는데 원인을 제공할 수 있다. 따라서 선박의 수명주기 중에서도 설계 단계에서 의장시스템의 신뢰성 평가 및 위험도 평가를 수행하는 업무에 대한 필요성이 대두되고 있다. 본 논문에서는 시스템 신뢰성 평가를 위한 방법으로 Dynamic fault trees를 작성한 후, 이를 정량적으로 계산하기 위한 방법으로 Bayesian networks를 사용한다. Ship machinery systems are used to provide a variety of functions at multiple locations in a whole ship. If any system fails to operate and loses its own function, it will affect ship operation. Subsequently, an accident, causing loss of lives or environmental pollution, can be induced by the failures of systems. Thus, ship machinery systems should be analyzed in terms of system reliability or safety during the design stage. This paper gives a methodology for quantitative system reliability assessment by constructing dynamic fault trees and converging them into Bayesian networks for calculation.

정량적인 선박 의장시스템 신뢰성 평가를 위한 Dynamic fault tree 작성 및 Bayesian network 로의 변환

김성택(Kim Sung-teak),김현승(Kim Hyeon-seung),오유택(Oh Yu-taek),정소연(Chung So-yeon),양영순(Yang Young-soon) 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5

선박 의장시스템은 선박에 필요한 다양한 기능을 제공하기 위해 선박 전체에 배치되어 사용된다. 선박 의장시스템이 고장으로 인해 이러한 기능을 할 수 없게 될 경우, 선박 전체의 운항에 영향을 끼쳐 인명이나 환경에 피해를 입힐 수 있는 사고가 발생하는데 원인을 제공할 수 있다. 따라서 선박의 수명주기 중에서도 설계 단계에서 의장시스템의 신뢰성 평가 및 위험도 평가를 수행하는 업무에 대한 필요성이 대두되고 있다. 본 논문에서는 시스템 신뢰성 평가를 위한 방법으로 Dynamic fault trees 를 작성한 후, 이를 정량적으로 계산하기 위한 방법으로 Bayesian networks 를 사용한다. Ship machinery systems are used to provide a variety of functions at multiple locations in a whole ship. If any system fails to operate and loses its own function, it will affect ship operation. Subsequently, an accident, causing loss of lives or environmental pollution, can be induced by the failures of systems. Thus, ship machinery systems should be analyzed in terms of system reliability or safety during the design stage. This paper gives a methodology for quantitative system reliability assessment by constructing dynamic fault trees and converging them into Bayesian networks for calculation.

교근부 보툴리눔 A형 독소(Botulinum Toxin Type A) 주사가 쥐의 턱뼈 성장에 미치는 영향

윤승현(Seung-Hyun Yoon),김지연(Ji-Yeon Kim),김성택(Seong-Taek Kim) 대한턱관절교합학회 2007 구강회복응용과학지 Vol.23 No.2

측두하악장애 환자에서의 통증양상과 수면과의 관계

태일호,김성택,안형준,권정승,최종훈,Tae, Il-Ho,Kim, Seong-Taek,Ahn, Hyung-Joon,Kwon, Jeong-Seung,Choi, Jong-Hoon 대한안면통증구강내과학회 2008 Journal of Oral Medicine and Pain Vol.33 No.2

Interaction between pain and sleep has long been proved through many researches, and various studies are being conducted to identify its mechanism. However, these studies have targeted on patients with systemic disease, such as rheumatic disease and fibromyalgia. There are few researches on patients with orofacial pain including temporomandibular disorder(TMD). In this study, we studied interaction between pain aspect and sleep quality in 229 patients with TMD, who visited the TMJ and Orofacial pain clinic. Pittsburgh Sleep Quality Index(PSQI), Epworth sleepiness scale(ESS) questionnaire were surveyed and sleep-screening device was operated. PSQI showed that sleep quality in TMD patients with pain was poorer than that in TMD patients without pain. The ratio of poor sleeper was higher in TMD patients with pain. Especially, TMD patients with chronic pain showed obviously poorer sleep quality than TMD patients with acute pain. The result of ESS showed that patients with painful TMD showed more daytime sleepiness than painless TMD patients. The ratio of TMD patients with chronic pain who had daytime sleepiness was higher than TMD patients with acute pain, and the amount of daytime sleepiness was higher in the group of chronic pain. In TMD patients with chronic pain, only the poor sleeper(PSQI>5) presented mean ESS>10(diagnostic criteria of daytime sleepiness). There was no correlation between pain intensity and sleep quality or daytime sleepiness. The result of ApnealinkTM for screening of sleep related breathing disorder showed that only 1 patient presented AHI>5 among 19 participants. TMD patients with chronic pain presented poor sleep quality and excessive daytime sleepiness similar to other chronic pain patients. Evaluation of sleep state by questionnaire might be useful for diagnosis and management of TMD, because sleep disturbance decreases pain threshold and pain disturbs sleep. In addition, sleep-screening device would be useful for screening sleep related breathing disorder in dental clinic.

전산화 단층촬영으로 평가한 교근에 대한 보툴리눔 A형 독소주사와 교합안정장치의 효과

장희영,강승철,김성택,김종열,최종훈,Jang, Hee-Young,Kang, Seung-Chul,Kim, Seong-Taek,Kim, Chong-Youl,Choi, Jong-Hoon 대한안면통증구강내과학회 2005 Journal of Oral Medicine and Pain Vol.30 No.2

The purpose of this study is to evaluate the effect of botulinum toxin type A on masseter muscle atrophy and the extent of masseter muscle affected from the injection site in relation to injection dose, with and without occlusal splint therapy through computed tomographic measurement. 32 volunteers were divided into four groups - group 25U (injection dose of 25 unit), group 25Us (injection dose of 25 unit with occlusal splint), group 35U (injection dose of 35 unit), group 35Us (injection dose of 35 unit with occlusal splint). Each group consisted of 8 people. 3 positions (position 1, 2, 3 - 10mm, 20mm and 40mm from the inferior border of the mandible, respectively) were selected for the evaluation of the masseter muscle change. The following results were obtained. 1. The thickness and the cross-sectional area of the masseter muscle had reduced in all groups except for the right side thickness at position 3 of group 25U and group 25Us, and the right side thickness as well as the left side cross-sectional area at position 3 of group 35Us. In group 35Us, the thickness and the cross-sectional area of the masseter muscle had reduced significantly in all positions (P < 0.05). 2. There was no significant difference in the masseter muscle change between the injection dose of 25unit and that of 35unit. 3. The groups with occlusal splint showed greater reduction of the masseter muscle thickness than the other groups (P < 0.05). From the above results, botulinum toxin type A injection together with occlusal splint therapy in the treatment of masseter muscle hypertrophy would be clinically effective.

이갈이의 진단 및 치료

권정승(Jeong-Seung Kwon),정다운(Da-Woon Jung),김성택(Seong-Taek Kim) 대한턱관절교합학회 2012 구강회복응용과학지 Vol.28 No.1

하악신경 손상 후 발생한 감각부전 환자들에 대한 분석

최영찬,권정승,김성택,안형준,Choi, Young-Chan,Kwon, Jeong-Seung,Kim, Seong-Taek,Ahn, Hyung-Joon 대한안면통증구강내과학회 2009 Journal of Oral Medicine and Pain Vol.34 No.4

The purpose of this study was to present basic data that is needed in comprehension of dysesthesia after mandibular nerve injury and grasp meaning. We analyzed medical records of 59 patients who were diagnosed as dysesthesia after mandibular nerve injury from January 2007 to July 2009. The results are summarized as follows. 1. The most frequent cause was implant surgery (59%) and the most frequent injured branch of mandibular nerve was inferior alveolar nerve(81%). 2. The period passed after nerve injury showed significant interrelationship with level of pain. Visual Analogue Scale(VAS) increased from 4.82 to 6.91 after 6 month. 3. The period passed after nerve injury did not show significant interrelationship with recovery of dysesthesia. But, when conservative treatment was offered at earlier stage, ratio of patients who showed recovery of symptom tended to increase. 4. In computed tomography, level of invasion into inferior alveolar nerve canal did not show significant interrelationship with level of pain and recovery of dysesthesia. Conclusively, in the patients with dysesthesia of mandibular nerve, inferior alveolar nerve injury by dental implant surgery dominated most significant problem. Although level of invasion into inferior alveolar nerve is the most important factor to initiation of dysesthesia, there are other various factors exert more influence on the level of pain or recovery of dysesthesia. Therefore, begining conservative therapy at earlier stage is encouraged. Also, because nerve injuries can occur without direct invasion into nerve canal, so leaving enough safe space from nerve canal is needed for prevention of indirect nerve injury.

비치성 치통의 치험 증례

윤승현,최종훈,김성택,안형준,권정승,Yoon, Seung-Hyun,Choi, Jong-Hoon,Kim, Seong-Taek,Ahn, Hyung-Joon,Kwon, Jeong-Seung 대한안면통증구강내과학회 2008 Journal of Oral Medicine and Pain Vol.33 No.4

치아의 통증은 구강안면부에서 가장 흔하게 발생하는 통증이다. 대부분의 치아 통증은 치수 및 치주조직의 병적인 변화로 인한 치성 통증이지만, 구강안면부의 다른 구조물의 병적 변화 또는 다른 질병 등에 의한 통증이 치아의 통증으로 나타나는 경우도 흔히 존재하며, 이러한 통증을 '비치성치통'이라고 한다. 비치성치통은 통증의 발현 부위와 통증의 원인 부위가 일치하는 원발성 통증이 아니라, 통증의 발현 부위와 통증의 원인 부위가 동일하지 않은 이소성 통증에 속하므로 통증의 원인을 찾아 치료해야만 개선될 수 있다. 비치성 치통을 유발하는 요인에는 신경병증성 통증, 부비동질환 기원의 통증, 근막통증, 신경혈관성 통증, 심장질환, 두개 및 구강안면부 종양, 중이염 등에 의한 전이통, 심인성 원인 등이 있다. 이러한 다양한 원인에 의한 통증이 치아부위에 나타나는 경우 치아 및 치주조직에 대한 임상 및 방사선 사진 검사 상 병적인 소견이 관찰되지 않음에도 불구하고, 치아통증과 유사한 임상적 증상을 나타낼 수 있다. 그러므로, 임상가들은 비치성 치통을 유발할 수 있는 원인 및 관련 증상들에 대하여 잘 알고 있어야 하며, 세심한 병력 청취, 치아 관련 구조물 및 그 외의 구조물에 대한 정확한 임상 검사를 통해 치성 통증과 감별할 수 있어야 한다. 본 증례 보고에서는, 치아 통증과 유사한 양상을 보이는 비치성 치통으로 내원한 환자의 진단 및 치료에 관한 증례를 통해, 비치성 치통에 대한 고찰 및 진단과 치료시의 고려 사항에 대하여 살펴보고자 한다.

측두하악관절 골관절염 진단에 있어 전산화 단층촬영의 유용성

전영미,최종훈,김성택,권정승,안형준,Jeon, Young-Mi,Choi, Jong-Hoon,Kim, Seong-Taek,Kwon, Jeong-Seung,Ahn, Hyung-Joon 대한안면통증구강내과학회 2008 Journal of Oral Medicine and Pain Vol.33 No.2

Osteoarthritis is caused by joint degeneration, a process that includes progressive loss of articular cartilage accompanied by attempted repair of articular cartilage, remodeling and sclerosis of subchondral bone, and osteophyte formation. The most common causative factor that either causes or contributes to osteoarthritis is overloading of the articular structures of the joint. The diagnosis of temporomandibular joint(TMJ) osteoarthritis is based on the patient's history and clinical findings such as limited mandibular opening, crepitation and tenderness to palpation on TMJ. The diagnosis is usually confirmed by TMJ radiographs, which will reveal evidence of structural changes in the subarticular bone of the condyle or fossa. Plain radiography techniques such as panoramic, transcranial, transpharyngeal views can be used in most dental offices for evaluation of the TMJs. However, plain radiographs are often limited due to overlapping and distortion of anatomical structures. The aim of this study was to compare the clinical examination and panoramic view with computed tomography for diagnosis of temporomandibular degenerative joint disease, and to compare the findings of condylar bony changes through panoramic radiography with that of computed tomography, hence, to confirm the limitations of clinical and panoramic radiography, and the validity of the computed tomography for diagnosis of temporomandibular degenerative joint disease. The pathophysiology of the TMJ osteoarthritis remains poorly understood, and current treatments are based more on speculation than science, and symptomatic treatments often fail to provide satisfactory pain relief. For diagnosis of TMJ osteoarthritis, clinical examination and radiographic examination for confirmation of the bony changes are essential, and computed tomography are clearly superior to plain radiographs for their limitations.