유한요소법을 이용한 치근단절제술후 근첨의 응력분포에 관한 연구

이세준,최호영,민병순,박상진,최기운 大韓齒科保存學會 1998 Restorative Dentistry & Endodontics Vol.23 No.1

The purpose of this study is to evaluate the distribution of stress in the root end resected teeth. The finite element method was used to compare stresses along the root and retrograde filling material in seven two-dimensional models of mandibular 2nd premolar. Each model was endodontic treatment and gold crown restoration. Each model divided with amagam corerestoration or gold casting post restoration. Thus each model divided with shape of root end resection, depth of retropreparation and exposure length of root in the bony cavity. The seven models were classified as in the table 1 below. ◁표참조▷ A load of 500N was applied 45°diagonally on the lingual slope of the buccal cusp. These models were analyzed with two dimensional finite element methods. The results of this study were as follows : 1. The maximum tensile stress along the inner canal wall was shown on the model 7. 2. When the model 1 was compared with the model 5, the maximum tensile stress along the inner canal wall showed the model 1. 3. Less equivalent stress was shown on the model 6 and more equivalent stress was shown on the model 4. 4. More shear stress was shown on the retrograde filling material of the model 7. 5. The models with increased length of exposed root in the bony cavity demonstrated a gradual increase to the tensile stress in X direction which occurred approximately a boundary between the bone and exposed root in the bony cavity. 6. The model which had a case of matching the apex of post and a boundary between the bone and exposed root in the bony cavity demonstrated more increase tensile stress in X direction than other models.

광개토호태왕 비문의 성 이름 연구

장세경,최병선 한양대학교 한국학연구소 1997 韓國學論集 Vol.31 No.-

급성기 뇌졸중 환자의 삶의 질

김세주,김영신,최낙경,이윤영,이병철,이만홍 한국정신신체의학회 2002 정신신체의학 Vol.10 No.1

대형 고무사출기의 구조해석 및 응력측정

노병욱,이태세,최병오,배성인 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-

The most important structural components of the injection molding machines had been analyzed by using finite element analysis. And the results were compared with strain which were measured by using straingage and data-logger. The position and the value of stress concentration were known by this study. So the optimal design can be expected as possible.

급성기 뇌졸중 환자 자살 사고

김세주,김영신,최낙경,서동향,이병철,이만홍 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.2

연구목적: 일반적으로 자살과 자살 사고의 가장 주된 위험 인자는 우울증, 불안장애와 같은 정신과적 질환의 동반 유무이다. 그러나 정신과적 질환 외에 신체적 질환의 동반 유무 또한 자살 및 자살 사고에 영향을 미치는 것으로 알려져 있다. 일반적인 신체 질환과 마찬가지로 뇌졸증 환자들에 있어 자살율이 증가한다는 몇몇의 보고들이 있다. 그러나 우리나라에서는 뇌졸중 환자의 자살 사고에 대한 연구가 보고된 바가 없다. 따라서 본 연구에서는 급성기 뇌졸중 환자들을 대상으로, 자살 사고의 발현율을 조사하고, 자살 사고 유무에 따른 사회문화적 변인 및 신경과적, 정신과적 임상 양상에 있어서의 차이에 대해 알아보고자 하였다. 방법: 1999년 7월부터 2000년 6월까지 한림대학교 성심병원 뇌졸중 센터에 입원한 77명의 급성기 뇌졸중 환자를 대상으로 하였다. Beck Suicidal Ideation Scale(BSIS)을 이용하여 자살 사고를 평가하였고, 우울 증상과 불안 증상은 각각 Beck Depression Inventory(BDI)와 Beck Anxiety Inventory(BAI)를 사용하였다. 사회적 지지체계의 정도는 사회적 지지체계 척도(Social Support Scale)를 사용하였으며, 뇌졸중 후 신경학적 장애의 정도는 National Institutes of Health Stroke Scale(NIHSS)와 Barthel's Index를 사용하였다. 결과: 약 35%의 뇌졸중 환자들이 심한 자살 사고를 보고하였다. 심한 자살 사고군에서 심하지 않은 자살 사고군에 비해 BDI, BAI 그리고 사회적 지지체계 척도 점수가 높은 반면, Barthel's index와 NIHSS는 두 군간에 유의한 차이를 보이지 않았다. 심한 자살 사고를 지닌 뇌졸중 환자의 대부분은 우울 증상이나 불안 증상을 가지고 있었으나, 일부의 환자들은 우울 증상이나 불안 증상 없이 자살 사고를 보고하였다. 결론: 급성기 뇌졸중 환자들의 많은 수가 정신과적 평가와 개입이 필요한 자살 사고를 가지고 있었다. 따라서 모든 급성기 뇌졸중 환자들을 대상으로 정기적으로 불안 및 우울 증상에 대한 평가와 더불어 직접 또는 간접적인 방법을 통한 자살 사고의 평가가 반드시 필요할 것으로 생각된다. Objective: The presence of psychiatric disorders including depression and anxiety disorders is considered to be the most important risk factor of suicide. Also, suicidal risk is known to be increased in patients who have serious medical illnesses. Like in patients with other medicalillness, some authors reported that suicidal risk is increased in patients with stroke. But there have been no reports with korean patients. The aim of this study is to investigate the frequency of suicidal ideation of patients in the acute stage of stroke, and to examine the demographic characteristics, and psychiatric and neurological symptoms between the patients with and without suicidal ideation. Method: Seventy seven hospitalized stroke patients at the Hallym Stroke Center from July of 1999 to June of 2000 were included in this study. Beck Suicidal Ideation Scale(BSIS) was used to evaluate suicidal ideation. Beck Depression Inventory(BDI) and Beck Anxiety Inventory(BAI) for depression and aniety, and Social Support Scale(SSS) for social support system of the stroke patients were used. Neurologic disabilities were rated with National Institutes of Health Stroke Scale(NIHSS) and Barthel's Index. Results: Thirty five percent(N=27) of the stroke patients reported severe suicidal ideation. Scores of BDI, BAI and SSS were higher in the patients with severe suicidal ideation than their counterpart. There were no differences in Barthel's index score and NIHSS between two groups. Most patients with severe suicidal ideation had depressive or anxiety symptoms. But patients without depressive or anxiety symptoms also reported severe suicidal ideation. Conclusions: Thirty five percent of stroke patients in acute stage of their illness have severe suicidal ideation that requires careful psychiatric evaluation and intervention. Inclusion of routine assessment of suicidal ideation in these patients is recommended.

초등학생의 과학에 대한 인지모니터링 기능의 효율성 분석

고광병,고세환,김범기,최관순 한국과학교육학회 2004 한국과학교육학회지 Vol.24 No.6

본 연구는 초등학생의 과학에 대한 인지모니터링 기능이 어느 정도인지, 또한 학년별 수준은 어떠한지를 알아보는데 그 목적이 있다. 연구 대상은 대전시에 위치하는 5개 학교에서 2~6학년까지 각 1개반을 표집하여 총 1001명을 대상으로 2~4학년용인 과학 인지모니터링 검사지Ⅰ(TSCMⅠ)와, 4~6학년용인 과학 인지모니터링 검사지Ⅱ(TSCMⅡ)를 개발하여 검사를 실시하였다. 학년별, 성별 과학 인지모니터링 기능의 효율성에 차이가 있는지를 알아보기 위해 분산 분석과 Scheffe´검증을 실시하였다. 연구 결과에 의하면 2~4학년의 인지모니터링 기능은 63.4%, 4~6학년에서는 57.4%의 효율성을 갖는 것으로 나타났다. 인지모니터링 기능의 효율성을 학년별로 구분 할 때, 3, 4학년은 2학년보다 유의미하게 높게 나타났으며, 5, 6학년이 4학년보다 더 높게 나타났다. 성별로 보면 2, 3학년은 여학생이 남학생보다 높았으며, 4~6학년은 성별 차이가 나타나지 않았다. The purpose of this study was to investigate the effectiveness of cognitive monitoring skills of elementary students on science by the grade and sex. The subject of this study was 1001 elementary students of 2~6 grade from 5 schools. The instrument of study, TSCM Ⅰ(Test of Science Cognitive Monitoring Ⅰ) for 2~4 grade and TSCM Ⅱ for 4~6 grade were developed. The results of this study showed that the effectiveness of cognitive monitoring skills was 63.4% for 2~4 grade and 57.4% for 4~6 grade. The effectiveness of cognitive monitoring skills of 3 and 4 graders was significantly higher than 2, while 5 and 6 was higher than 4 graders. Girls were higher than boys for 2 and 3 grade, but 4?6 graders were not significantly different by the sex.

소아에서 외상성 질식 증후군에 대한 임상적 고찰

박승현,최승필,나병호,황주일,나석주,전해명,김세경 大韓應急醫學會 1996 대한응급의학회지 Vol.7 No.1

Traumatic asphyxia has often been described as a rare clinical syndrome characterized by cervicofacial cyanosis and edema, multiple petechiae, and subconjunctival hemorrhage after a severe crush injury of the thorax or upper part of the abdomen. The pathogenesis of traumatic asphyxia is that after compression of the chest or upper abdomen, intrathoracic pressure increased suddenly. Blood is forced out of the right atrium through the valveless innominate and jugular veins into the head and neck. This sudden increased thoracic pressure in small venules and capillaries causes rapid dilation and minute hemorrhages producing the petechiae often seen. Treatment is supportive and should be focused on the associated injuries. The prognosis for traumatic asphyxia is very good despite the alarming initial physical appearance. If the patient survives the initial insult, the prognosis is excellent. Neurologic sequale may be permernant. We experienced five case of the traumatic asphyxia, and its clinical and pathophysiologic features are discussed. Increased awareness of this syndrome by emergency physicians will result in better reporting ad understanding of its clinical implications.

Ether 및 Halothane마취시 정맥혈에서의 Lactate, Pyruvate 및 Excess lactate치의 변화에 대한 연구

김익수,최세진,백문기,황병두 대한마취과학회 1977 Korean Journal of Anesthesiology Vol.10 No.3

Venous blood lactate, pyruvate and excess lactate have been measured by the enzymatic method and calculated in 24 patients over a period of 2 hours during operation under general anesthesia. When the anesthetic was diethyl, ether, lactate and dyruvate levels showed a gradual increase significantly from 30 minutes and 60 minutes after induction of anesthesia respectively. Excess lactate appeared 30 minuts after induction of anesthesia, being increased slightly thereafter. When halothane was used, lactate level rose significantly in 120 minutes but no significant change in pyruvate and excess lactate was observed. In comparison to the results obtained in arterial blood during ether anesthesia by others, the levels of lactate and pyruvate found in this study were higher than those observed in arterial blood, whereas there was no considerable difference in change with duration of anesthesia and excess lactate. From the above results we suggested that venous blood lactate, pyruvate and excess lactate were essentially the same as those of arterial blood for evaluating tissue hypoxia during general anesthesia.

심한 저칼륨혈증을 동반한 갑상선 중독성 주기성 마비 2례

유승진,최승필,최경호,오동렬,황주일,나병호,김세경 대한응급의학회 1996 대한응급의학회지 Vol.7 No.2

Thyrotoxic periodic paralysis occurs primarily in Orientals with an overwhelming male preponderance and a higher association of specific HLA antigens. Clinical manifestations include onset after high carbohydrate ingestion or heavy exertion with progressive symmetric weakness leading to flaccid paralysis of the extremities and other muscle groups, lasting several hours. Other precipitating facters include trauma, infection, administration of epinephrine, thyroid hormone, or corticosteroid. If hypokalemia is present, potassium administration may help abort the attack. Although propranolol can be efficacious in preventing further episodes, the only definitive treatment is euthyroid state. The pathophysiology is still controversal, but reflects altered potassium and calcium dynamics as well as certain morphologic characteristics within the muscle unit itself. We discribed two patients with thyrotoxic periodic paralysis who had a no familial history of paralysis and had a decreased level of serum potassium during attack.

아세클로페낙 연질캡슬(클란자 에스 연질캡슬)의 개발

용철순,이경희,최진석,박병주,정세현,김용일,박상만,배명수,김귀자,김영식,유창훈,강성룡,유봉규,이종달,최한곤 한국약제학회 2004 Journal of Pharmaceutical Investigation Vol.34 No.1

To develop and aceclofenac soft capsule, four preparations with various solubilizers were prepared and their dissolution test was carried out. Among four preparations tested, a preparation with ethanolamine was selected a formula of aceclofenac soft capsule (Clanza S^(™), since it showed the fastest dissolution rate. Bioequivalence of aceclofenac tablet, Airtal^(™)(Dae-Woong Pharmaceutical Co., Ltd.) and aceclofenac soft capsule, Clanza S^(™)(Korea United Pharmaceutical Co., Ltd.) was evaluated according to the guideline of KFDA. Fourteen normal male volunteers (age 20-25 years old) were divided into two groups and a randomized 2×2 cross-over study was employed. After oral administration of one tablet or capsule containing 100 ㎎ of aceclofenac, blood ws taken at predetermined time intervals and the concentration of aceclofenac in plasma wa determined with an HPLC method under UV detector. The pharmacokinetic parameters (C_(max), T_(max) and AUC_(t)) were calculated and ANOVA was utilized for the statistical analysis of parameters using logarithmically transformed AUC_(t), C_(max) and T_(max) between Airtal tablet and Clanza soft capsule were 2.89%, 0.18% and 43.0%, respectively. There were no sequence effects between two formulations in these parameters. The 90% confidence intervals using logarithmically transformed data were within the acceptance range of log(0.8) to log(1.250(e.g.log(0.81) - log(1.23) and log(0.89) - log(1.14)) for AUC_(t) and C_(max), respectively. Thus, the criteria of the KDFA guidelines for the equivalence was satisfied, indicating that Clanza S^(™) soft capsule is bioequivalent to Airtal^(™) tablet.