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서울지역(地域) 중(中).고등학생(高等學生)의 전치외상(前齒外傷)에 관(關)한 연구(硏究)
김종철,Kim, Chong-Chul 대한소아치과학회 1979 大韓小兒齒科學會誌 Vol.6 No.1
The author surveyed traumatized anterior teeth of 12~17 year old 9453(male 4740, female 4713) school students. The results were as follows: 1. The prevalence of traumatized anterior teeth was $10.3{\pm}0.6%$. 2. The prevalence of traumatized anterior teeth of male was $12.2{\pm}0.9%$, and that of female was $8.4{\pm}0.8%$. The prevalence of male was higher than that of female. 3. The distribution of traumatized teeth by severity was as follows: Class I-65.3%, Class II-20.7%, Class III-8.2%, Missing teeth-5.4%, Others-0.4%. 4. Maxillary central incisors had the highest trauma frequence. 5. Single fractures were found to occur more commonly than multiple fractures. 6. The percentage of treated person was 5.1%. 7. 72.3% of the sample was not affected by the traumatized anterior teeth, and 27.7% of the sample thought the traumatized anterior teeth ugly.
김종철(Jong-Chul Kim),고봉철(Bong-Chul Ko),정혁진(Hyok-Jin Chong),임형준(Hyung-Jun Rim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The paper is development of SRSW(Smart Rear Side Warning) system using 24GHz radar. SRSW system consists of two radar sensors and HMI for driver and ECU. To distinguish closing and falling back vehicle SRSW system use extended kalman filter algorithm. LED and motorized seat belt are used for subject driver to warn the side and rear collision. And hazzard lamp is used for other vehicle driver to warn rear collision. To implemet tracking algorithm and warning algorithm in real time SRSW use ECU. And SRSW systems use TTC warning algorithm for BSD(Blind Spot Detection), LCA(Lane Change Assist) and RPC(Rear Pre Crash). These algorithms are tested and verified on the proving ground and real road.
Matlab/M-file을 사용한 Switched Reluctance Motor의 시뮬레이션
김종철(Kim Chong-Chul),현동석(Hyun Dong-Seok) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
This paper presents a new analytical representation and simulation of the phase inductance of a Switched Reluctance Motor(SRM) using Matiab/M-file. This simulation method has many advantages It is free from expression, can be applied widely, demonstrates inductance profile Using motor parameter only, and save run time Moreover, this simulation method can be easily realize various SRM model unlikely the existing method that limited Itself to one model. And analytical expression for inductance profile is welcome as it allows for easier analysis of the motor, for it can bring insight In It working, In formulating control strategies and In achieving high accuracy in performance computations.
김종철(Chong-Chul Kim),신중묵(Jung-Mug Shin),이병석(Byeong-Seok Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In industrial field, electric fork-lift has been mainly powered by batteries which are varied from DC 36V to 80V. Operating electric fork-lift truck depends on stable electric power supplies which are ensured by using Switched Mode Power Supply (SMPS). This paper presents design of SMPS for stable electric power supply. The SMPS has much strength such as high effectiveness, low cost and high stability of output voltage. At the same time, SMPS is small and multi output and has simple design of circuit.
Dental treatment of a Down syndrome patient with acute lymphoblastic leukemia
Jung-Woo Kim(김정우),Chong-Chul Kim(김종철),Sang-Hoon Lee(이상훈),Ki-Taeg Jang(장기택),Jung-Wook Kim(김정욱),Young-Jae Kim(김영재),Teo-Jeon Shin(신터전),Hong-Keun Hyun(현홍근) Asia association of Disability and Oral health 2011 International Journal of Disability and Oral Healt Vol.7 No.2
다운 증후군(Down syndrome, Trisomy 21)은 가장 흔하게 나타나는 증후군으로 대략 1/1000의 확률로 태어난다. 세 개의 유전적 유형이 있지만, 95% 정도가 3개의 21번 염색체를 갖는 비분리 염색체 유형이다. 주된 구강 증상으로는 거대설, 균열설, 과잉치, 결손치, 왜소치, 유치와 영구치의 맹출지연 그리고 이에 따른 부정교합 등이 있다. 75%의 환자에서는 어린 나이에 치주질환에 이환되기 쉬우며, 치아우식증에는 낮은 이환율을 보인다는 보고가 있다. 급성 림프구성 백혈병(Acute Lymphoblastic Leukemia)은 주로 어린이에서 나타나며, 특히 다운 증후군 환자에서의 발병율은 정상인에 비해 20배 높다. 치은비대와 출혈의 양상이 주로 나타나며, 간혹 상악골과 구개골에 종괴가 관찰되기도 한다. 본 증례에서는 서울대학교치과병원 소아치과에 내원한 환자 중 급성림프구성 백혈병을 앓고 있는 다운 증후군 환아가 있어 이를 보고하고자 한다.
소아 환자의 치수 혈류 평가를 위한 광용적맥파 파형 분석
김효은 (Hyo-Eun Kim),신터전(Teo Jeon Shin),공현중 (Hyoun-Joong Kong),김필종(Pil-Jong Kim),현홍근(Hong-Keun Hyun),김영재(Young-Jae Kim),김정욱(Jung-Wook Kim),장기택(Ki-Taeg Jang),김종철(Chong-Chul Kim),이상훈 (Sang-Hoon Lee) 大韓小兒齒科學會 2016 大韓小兒齒科學會誌 Vol.43 No.2
The purpose of this study was to analyze photoplethysmographic waveforms from pulse oximeter using raw data of red and infrared light and investigate the reference values of parameters (Height, Width50, Maximum slope, Minimum slope, Area) for evaluating pulpal blood flow in maxillary central incisors with normal pulp vitality in children. The study was performed in 30 pediatric patients, aged 7-16 years old, using pulse oximeter (MEKICS Co., Ltd, Korea) combined with a custom-made sensor. The raw data was obtained and recorded by custom-made software and analyzed by LabChart (v.7.3, ADInstruments, Germany) offline. In this study, we analyzed photoplethysmographic waveforms from pulse oximeter applied to maxillary central incisor for assessment of pulpal blood flow and suggested several reference values of young permanent maxillary central incisor with normal pulp. On average, the waveform of red light was higher, stiffer and wider than that of infrared light. Future studies about reference values for other normal teeth and the teeth with impaired pulp vitality are needed. 본 연구는 맥박산소측정기를 이용하여 광용적맥파 파형의 원데이터를 기록하고 분석함으로써 치수 생활력 측정에 이 원데이터 분석의 적용가능성을 살펴보고 정상 치수 생활력을 갖는 소아환자의 상악 중절치에 대한 광용적맥파 파형의 파라미터에대한 기초 자료를 마련할 목적으로 시행되었다. 상악 중절치에 대해 정상 치수 생활력을 갖고 전신질환이 없는 30명의 환아(남 16명, 여 14명, 평균연령 11.4세)를 연구대상으로 선정하였다. 맞춤형 센서와 맥박산소측정기를 이용하여 측정하였으며 측정결과는 적색 파장과 적외선 파장의 원데이터 형태로 기록되었고 LabChart(v.7.3, ADInstruments, Germany)를 이용하여 분석하였다. 본 연구를 통해 소아에서 정상 치수생활력을 갖는 상악 중절치에 대한 광용적맥파 파형의 파라미터의 기준값을 제시할 수있었으며 소아의 치수혈류측정에 이러한 광용적맥파 파형 분석이 활용될 수 있음을 확인하였다.
김동현(Dong-Hyun Kim),신터전(Teo-Jeon Shin),현홍근(Hong-Keun Hyun),김영재(Young-Jae Kim),김정욱(Jung-Wook Kim),이상훈(Sang-Hoon Lee),김종철(Chong-Chul Kim),장기택(Ki-Taeg Jang) Asia association of Disability and Oral health 2016 International Journal of Disability and Oral Healt Vol.12 No.2
Regular dental visit of disabled patients is an important strategy for maintenance of oral health because of the lack of awareness of oral care. But there is limited information about follow up period in disabled patients after dental treatment. The aim of this study was to investigate the pattern of dental visit and dental management of special care needs patients according to the types of disabilities. A total of 140 patients who received dental treatment at Seoul National University Dental Hospital from 2010 to 2012 were reviewed. Patients were divided 3 groups according to the types of disabilities (disorder of external physical function, disorder of internal organ, psychic disability). Patient’s characteristic, dental treatment performed, follow up period and frequency were investigated. The mean follow up period was 28.2 months and average frequency of visit was 3.69 times per year. There was no difference in period and annual visit between 3 groups, but significantly difference in cooperation with medical hospital in affiliation. Regular check-up was the most common dental treatment in all groups. In psychic disorder group, the proportion of sedative treatment was significantly higher than other groups. The results of this study provide information necessary for treatment planning and dental management of disabled patients.
미다졸람 경구 전투약을 이용한 발달장애 환아의 전신마취하 우식치료 증례보고
김효은(Hyo-eun Kim),신터전(Teo-Jeon Shin),김영재(Young-Jae Kim),김정욱(Jung-Wook Kim),장기택(Ki-Taeg Jang),이상훈(Sang-Hoon Lee),김종철(Chong-Chul Kim),현홍근(Hong-Keun Hyun) Asia association of Disability and Oral health 2013 International Journal of Disability and Oral Healt Vol.9 No.1
Developmental disorders are a group of psychiatric conditions originating in childhood that involve serious impairments in different areas. These disorders comprise language disorders, learning disorders, motor disorders and autism spectrum disorders. Midazolam is a short-acting drug in the benzodiazepine class developed by Hoffmann-La Roche in the 1970s. The drug is used for treatment of acute seizures, moderate to severe insomnia, and for inducing sedation and amnesia before medical procedures. It possesses profoundly potent anxiolytic, amnestic, hypnotic, anticonvulsant, skeletal muscle relaxant, and sedative properties. The anterograde amnesia property of midazolam is useful for premedication before surgery to inhibit unpleasant memories. This article presents a case report including caries treatment of a 8-year-old male patient with developmental disorders using oral midazolam premedication as an alternative method of behavior management prior to general anesthesia.
Dental treatment of a Down syndrome patient with acute lymphoblastic leukemia : a case report
김정우,김종철,이상훈,장기택,김정욱,김영재,신터전,현홍근,Kim, Jung-Woo,Kim, Chong-Chul,Lee, Sang-Hoon,Jang, Ki-Taeg,Kim, Jung-Wook,Kim, Young-Jae,Shin, Teo-Jeon,Hyun, Hong-Keun Korean Association for Disability and Health 2011 대한장애인치과학회지 Vol.7 No.2
다운 증후군(Down syndrome, Trisomy 21)은 가장 흔하게 나타나는 증후군으로 대략 1/1000의 확률로 태어난다. 세 개의 유전적 유형이 있지만, 95% 정도가 3개의 21번 염색체를 갖는 비분리 염색체 유형이다. 주된 구강 증상으로는 거대설, 균열설, 과잉치, 결손치, 왜소치, 유치와 영구치의 맹출지연 그리고 이에 따른 부정교합 등이 있다. 75%의 환자에서는 어린 나이에 치주질환에 이환되기 쉬우며, 치아우식증에는 낮은 이환율을 보인다는 보고가 있다. 급성 림프구성 백혈병(Acute Lymphoblastic Leukemia)은 주로 어린이에서 나타나며, 특히 다운 증후군 환자에서의 발병율은 정상인에 비해 20배 높다. 치은비대와 출혈의 양상이 주로 나타나며, 간혹 상악골과 구개골에 종괴가 관찰 되기도 한다. 본 증례에서는 서울대학교치과병원 소아치과에 내원한 환자 중 급성림프구성 백혈병을 앓고 있는 다운 증후군 환아가 있어 이를 보고하고자 한다.