최근 8년간 K지방대학병원 응급실로 내원한 치과 응급환자에 관한 임상적 연구

유재하,김종배,김태우,문선재,권혁찬,김승범 大韓顎顔面成形再建外科學會 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.6

The delivery of the proper care to the emergency dental patients is more important in the aspdect of community dental service. To attain such a purpose requires the sacred duty to the training of oral and maxillofacial surgeons. This is a retrospective study on the characteristics of dental injuries and diseases in emergency patients. Ths study was based on a series of 2,649 patients treated as dental emergency patients at K country hospital of medical college, from Jan. 1, 1993, to Dec. 31, 2000. The obtained results were as follows. The trauma(71.6%) was the most frequent cause in dental emergency patients, odontogenic infection and oral hemorrhage were next in order of frequency. The primary interdental wiring and transpalatal wiring were frequent proper methods with rubber drainage for prevention of hemorrhage and infection in the primary care of jaw fracture. The peak incidence(45.0%) about the infection group was occurred in the pulpitis of advanced dental caries, and common treatments were the medication of antibiotics & anagesics and I&D. In the dentoalveolar hemorrhage group, a major cause was postoperative hemorrhage(57.9%) and hemostasis was obtained by pressure dressing, suture and drainage of infected wound. About TMJ disorder group, the peak incidence was showed in the post-traumatic myofascial pain dysfunction syndrome and its primary care was medications(anagesics & sedatives). In the other groups, various irritable specific pains were complained, such as trigeminal neuralgia-form pain, acute stomatitis, chemical burn, terminal stage neuritis of head & nech cancer and their primary care methods were various individually. For the rapid and correct care of the emergency dental disease above, well-trained education should be presented in the intern and resident curriculum of oral & maxillofacial surgery.

非晶質 유리半導體 As-Te-Ga系의 電氣的 및 光學的 特性

이종록,柳善玉 梨花女子大學校 韓國生活科學硏究院 1988 韓國生活科學硏究院 論叢 Vol.41 No.-

3성분계 비정질 유리 반도체 As-Te-Ga 계에서 Ga을 0,5,10,15 at.%의 비로 첨가하여서 bulk시료를 만든 후에 thermal evaporation 방법에 의해서 박막 시료를 만들어 직류 전기 전도도와 광 흡수도를 측정하였다. X-선 회절 실험에 의해서 각 시료는 비정질임이 확인되었다. 직류 전기 전도도는 약 200K에서 350K의 온도범위에서 1/T에 비례하며 σ=σ_0exp(-ΔE_a/kT)의 관계식을 만족한다. 이 온도 범위에서 그 값은 1.2×10^-2(Ω^-2cm^-1)∼1.4×10^-7(Ω^-1cm^-1)을 나타내며 Ga의 농도가 증가함에 따라서 그 값은 증가한다. 또한 Ga의 농도가 증가함에 따라 전도도의 활성화 에너지는 감소한다. 광학적 에너지 gap은 Ga의 농도가 증가함에 따라 0.81eV에서 0.64eV로 감소한다. 광학적 에너지 gap과 활성화 에너지의 차는 Ga의 농도에 관계없이 일정하다. Dc conductivity and optical absorption coefficient of glassy semiconductors As-Te-Ga system are measured as a function of Ga content up to 15 at. %. The thin film samples are prepared by the thermal evaporation form bulk material obtained by melt quenching. By the result of X-ray diffraction experiment, it is convinced that all samples are confirmed as amorphous semiconductor. Dc conductivities are proportional to inverse of temperature and satisfied the relation σ=σ_0exp(-ΔE_a/kT). Over the temperature range from about 200K to 350K, the dc conductivity of the investigated samples are 1.2×10^-2(Ω^-2cm^-1)∼1.4×10^-7(Ω^-1cm^-1). Dc conductivity increases with increase of Ga concentration. And the activation energy of conductivity decreases with increase of Ga concentration, the optical energy gap E^opt_g decrease with the Ga concentration having the value of the range. It is also shown that the value of difference E^opt_g-ΔE_a is independent of Ga concentration.

Beta-차단제와 Hydrochlorothiazide 倂用에 依한 본태성 고혈압 환자의 血淸脂質에 미치는 效果

金善政,李宗經,劉元相 인제대학교 1984 仁濟醫學 Vol.5 No.4

Serial changes of serum lipids were observed in 54 patients with essential hypertension, administered several beta-blockers (e.g. acebatolol 400mg, atenolol 50mg, pindolol 10mg, propranolol 160mg, respectiviely) combined with hydrochlorothiazide 25mg for up to 12 weeks. The results were as follows: 1.The blood pressure was normalized at 12 weeks except propranolol group. 2.Seroum total cholesterol was decreased to 11% in both pindolol group and propranolol group, and not remarkable in other groups. 3.Triglyceride was decreased in propranolol group to 50% at 6week and 12 weeks, and not remarkable in other groups. 4.HDL-Cholesterol was decreased from 5% to 20%, most remarkable in propranolo group and decreased in pindolol group to 5% only. 5.Cholesterol ratio was increased only in pindolol group to 4.5% and decreased from 5% to 10% in other groups. In summary, these mild changes of serum lipid profiles alarm the physicians to check serum lipids before and during medication, especially in youger hypertensive and hyperlipidemic patient.

Digital imaging fiber-optic trans-illumination과 laser fluorescence를 이용한 평활면 초기우식증의 재광화에 관한 비교 연구

황규선,김종수,유승훈 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2

본 연구는 Digital Imaging Fiber-Optic Trans-Illumination(DIFOTI)이나 Laser Fluorescence(LF)를 이용한 방법이 평활면 법랑질 초기우식증의 재광화 정도를 정확하게 monitoring 할 수 있는지의 여부를 평가하기 위하여 진행되었다. 우치 법랑질로부터 얻어진 인공 우식 절편을 특별히 제작된 의치에 식립한 다음, 10명의 실험 참가자들이 구강 내에 장착하고 3주 동안 불소 양치용액을 사용하도록 한 다음 Confocal Laser Scanning Microscopy(CLSM)로 측정된 병소 깊이를 gold standard로 사용하여 DIFOTI와 LF로 측정된 우식 절편의 재광화 정도를 비교 평가한 후 다음과 같은 결론을 얻었다. 1. DIFOTI에 측정된 광도 백분율이 재광화 기간이 지남에 따라 증가하였으며, CLSM에서 측정된 병소 깊이와 유의한 역상관관계를 보였다(r=-0.683, p<0.01). 2. LF 측정치는 재광화 기간이 경과함에 따라 증가하였으며 CLSM에서 측정된 병소 깊이와 유의한 상관관계를 보였다(p<0.05). 3. CLSM 촬영 결과 500 ppm 불소 양치군이 0 ppm 불소 양치군보다 빠른 속도로 병소 깊이가 감소하는 양상을 보여 주었다. Through out the world dental caries seems to be decreased as it is difficult to make an accurate diagnosis for dental caries. The traditional diagnostic method which is probing and x-ray taking has many limitations to diagnose the early caries, so there were recommendations for the needs of new equipments such as laser fluorescence(LF), digital imaging fiber-optic trans-illumination(DIFOTI), and quantitative light fluorescence(QLF) which were developed from various study results. Also confocal laser scanning microscopy(CLSM) and ultrasonics are used for research progression. This study is to evaluate whether it is possible to monitor accurately for remineralization amount of enamel surface early caries using DIFOTI or LF. After inducing artificial caries to bovine teeth to 10 participants. remineralization was enhanced by 0 ppm and 500 ppm fluoride mouth rinse solution for 3 weeks. Then they were cross sectioned and analyzed using gold standard of the lesion depth measured by CLSM. The following results were obtained: 1. The measured percentage of light intensity(luminosity ratio) by DIFOTI increased with remineralization period, and showed significant reverse correlation with lesion depth measured by CLSM(p<0.01). 2. The measurement of laser fluorescence increased with remineralization period, and showed significant correlation with lesion depth measured by CLSM(p<0.01). 3. To the result for CLSM, 500 ppm fluoride mouth rinse group showed rapid rate for decreased tendency of lesion depth than 0 ppm fluoride mouth rinse group. In conclusion DIFOTI system was used to measure accurately for the remineralization amount of early surface caries, it is a very useful equipment to detect precisely the changes for early enamel caries remineralization during treatments.

배전시스템에서의 재폐로 과도현상분석

김재철,유선종,임성정 崇實大學校 生産技術硏究所 1996 論文集 Vol.26 No.1

This paper analyzed the transient phenomena due to auto-reclosing on electrical distribution system. Computer models presented in this paper consist of a distributio overhead line model, underground cable model, transformer, model, grounding model, load model, substation model, capacitor bank model, and distribution sruge-arrester model. The computer models are represented by Electromagnetic Transients Program(EMTP). Ther results from the simulation depict the validity of a computer model and the impact of custormer side during auto-reclosing at 22.9kV distribution systme. Also, parametric analysis illustrate that the various factors affct the transient thenomena caused to anto-reclosing.

노박덩굴(Celastrus orbiculatus)의 繁殖에 관한 硏究

沈慶久,安永熙,柳美先,劉鍾勳 成均館大學校 科學技術硏究所 1984 論文集 Vol.35 No.2

Bittersweet(Celastrus orbiculatus) grown widely in the mountains of Korea is perennial, deciduous and climbing plant. They have strong vines, flower from May to June and mature in October. The red coloured fruits are beautiful, use as the cut-flower materials, and also as the food of birds. This is now considered worthwhile to exploit as an outstanding landscape plant. The objectives of this study were investigation of the suitable propagation methods, reaffirmation of the utility of mist room for softwood cuttings, influence of bed temperature for hardwood cuttings, and determination of the effectiveness of various rooting promotion treatments. The results obtained were summarized as follows. The germination rate was 70% when the period of stratification was 50 days. In softwood cuttings, the rooting percentage and rootlet number tended to be greater in closed moist chamber than those in mist rooms. The rooting percentage, rootlet number and length of root in the 25℃-bed temperature were higher than those in the bed of 20℃ or 30℃ in hardwood cuttings. Cuttings treated with IBA 1000ppm rooted better than those received other hormone treatments in hardwood and softwood cuttings.

인지기능과 사건관계 전위

이성훈,이종섭,한은선,유계준 大韓神經精神醫學會 1990 신경정신의학 Vol.29 No.4

Event related potential(ERP) were measured in thirty one normal controls(32.9±6.3 in average age), while two kinds of stimuli, frequent and infrequent stimuli were given with an instruction(for counting infrequent stimuli), without an instruction. The amplitudes on N1, P2, P3 were significantly higher with infrequent stimuli than with frequent stimuli in ignoring condition. In instructed condition, the significantly higher amplitudes in P1, N1, P3 components were noted with infrequent stimuli than with frequent stimuli. The amplitude of P3 increased most prominently in an attending condition comparing to an ignoring condition. Good performers of this task showed significantly higher amplitudes in N1 and P3 than bad performers.

등칡(Aristolochia manshuriensis)의 繁殖에 관한 硏究

沈慶久,安永熙,柳美先,劉鍾勳 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1

Aristolochia manshuriensis KOM. distributed in the northern parts of Kangweon Province centering Mt. Seorag in Korea is a vigorous and climbing vine. It has been used widely as one of ingredients of chinese medicine. The unusual flowers by virtue of their shape and hue are beautiful, flowered in May and matured in October. The large leaves are coarse in texture, and have been used as arbor, trellis, pergola, and pillar. Therefore, it is now considered as an excellent ornamental plants for Landscape. The objectives of this study were investigation of the suitable propagation methods, comparison of the influence of bed temperature for hardwood cuttings, and determination of the effectiveness of various rooting promotion treatments. The results obtained were as follows. The germination rate 53% when the period of stratification was 70 days. The rooting percentage, rootlet number, and length of root male plants are generally better than those of female plants. The female and male plants cuttings tended to have the largest root system in the 20℃-bed temperature. The female plants treated with 20℃, IBA 1000ppm and 25℃ IBA 1000ppm. The male plants treated with 20℃, IBA 500ppm rooted well.

Prediction of successful caudal epidural injection using color Doppler ultrasonography in the paramedian sagittal oblique view of the lumbosacral spine

( Seon Woo Yoo ),( Min-jong Ki ),( A Ram Doo ),( Cheol Jong Woo ),( Ye Sull Kim ),( Ji-seon Son ) 대한통증학회 2021 The Korean Journal of Pain Vol.34 No.3

Background: Ultrasound-guided caudal epidural injection (CEI) is limited in that it cannot confirm drug distribution at the target site without fluoroscopy. We hypothesized that visualization of solution flow through the inter-laminar space of the lumbosacral spine using color Doppler ultrasound alone would allow for confirmation of drug distribution. Therefore, we aimed to prospectively evaluate the usefulness of this method by comparing the color Doppler image in the paramedian sagittal oblique view of the lumbosacral spine (LS-PSOV) with the distribution of the contrast medium observed during fluoroscopy. Methods: Sixty-five patients received a 10-mL CEI of solution containing contrast medium under ultrasound guidance. During injection, flow was observed in the LSPSOV using color Doppler ultrasonography, following which it was confirmed using fluoroscopy. The presence of contrast image at L5-S1 on fluoroscopy was defined as “successful CEI.” We then calculated prediction accuracy for successful CEI using color Doppler ultrasonography in the LS-PSOV. We also investigated the correlation between the distribution levels measured via color Doppler and fluoroscopy. Results: Prediction accuracy with color Doppler ultrasonography was 96.9%. The sensitivity, specificity, positive predictive value, and negative predictive value were 96.7%, 100%, 100%, and 60.0%, respectively. In 52 of 65 patients (80%), the highest level at which contrast image was observed was the same for both color Doppler ultrasonography and fluoroscopy. Conclusions: Our findings demonstrate that color Doppler ultrasonography in the LS-PSOV is a new method for determining whether a drug solution reaches the lumbosacral region (i.e. , the main target level) without the need for fluoroscopy.

역모기지제도가 국민경제에 미치는 파급효과

유선종(Yoo, Seon-Jong),구본영(Gu, Bon-Young) 한국노년학회 2005 한국노년학 Vol.25 No.3

The purpose of this study is to empirically identify the economic effect of the Reverse Mortgage System on the Gross Domestic Production as a method to justify the necessity of the overall introduction of the Reverse Mortgage System into Korean society. For this analysis the input-output table provided by the Bank of Korea in 2000 has been used. The economic effects of the Reverse Mortgage System are analyzed under the categories: Production, Value Addition, and Employment. This research results indicate that the overall effect will be 1,145.3 billion Krw and the product induction ratio could be 1.98. The number of new jobs generated from the interrelationship between the total number of employees in the employment index and GDP will be up to 8,873. The aggregated income from these jobs will be 213.3 billion krw. The overall effects of reverse mortgage system mirrored from the price table of producers contribute to the increase in GDP by 0.19%, From the above macro-economic analysis, the paper concludes that the expansion of the reverse mortgage system have a positive impact on national economy and other related areas. 이 연구는 우리나라의 급속한 고령사회 현상에 따른 공적 역모기지제도 도입이 국민경제에 미치는 파급효과를 분석한 연구이다. 조사 대상자는 서울특별시 25개구 전역의 50세 이상 70세 이하 중ㆍ장년층 세대주 530명을 대상으로 하였으며, 이 제도의 관심 및 이용의향 등을 면접ㆍ설문조사하였다. 조사대상자의 28.2%가 이 제도의 이용의향이 있는 것으로 조사되었으며, 이를 토대로 2000년 한국은행에서 발표한 산업연관표를 이용하여 국민경제에 미치는 직접효과, 1차 파급효과, 2차 파급효과 등을 정리하여 종합적인 파급효과를 분석하였다. 그 결과 직접투자효과는 5,795억원으로 추정되었고, 이에 따른 전체 파급효과는 직접투자금액의 1.98배인 1조 1,453억원으로 추계되었다. 이러한 생산유발효과로 발생하는 부가가치총액은 5,213억원으로 0.9배의 생산유발효과가 있으며 또 고용자소득은 0.36배인 2,114억원으로 추계되었고, 8,873명의 고용유발효과를 보일 것으로 추정되었다. 또한 전체 파급효과로 나타난 생산유발액은 우리나라 전체 부가가치(GDP)의 약 0.19%를 차지하였다. 즉, 이 제도 실시에 따른 경제파급효과로서 다른 산업에 상당한 파급효과가 있는 것으로 나타났다.