Continuous Wave of Condensation Technique으로 근관충전시 치근면 온도상승 분석

김영주,황윤찬,김선호,황인남,최보영,정영진,정우남,오원만 전남대학교 치의학연구소 2003 구강과학 Vol.15 No.4

This study was conducted to evaluate safety to the supporting tissues of the root while the root canal is obturated using continuous wave of condensation technique. A extracted maxillary central incisor was prepared for repeated canal obturation. After conventional access opening, working length was then established to the point 1㎜ from anatomical root apex. The root canal was prepared with GT rotary Ni-Ti file (Dentsply Maillefer, Switzerland). Five thermocouples (Onega Engineering Inc., USA) were placed at 2㎜ increments on one side beginning 1㎜ from the anatomical root apex and the other five thermocouples at 2㎜ increments on the other side beginning 2㎜ from it. For obturation, a nonstandardized medium size gutta-percha cone and a ML Buchanan plugger (Analytic technologies, USA) were selected. After drying of root canal, AH 26 root canal sealer (Dentsply Detrey, Germany) was applied on the wall of the root canal. Baseline temperature was measured on the root surface. The ML size plugger was preheated for 2seconds and then the real temperature of it was recorded before insertion into the root canal. The root canal was obturated with continuous wave of condensation technique as described by Buchanan. The root surface temperature was recorded during obturation and it was performed ten times at each of the following temperature settings: 150℃, 200℃, 250℃ and 300℃. After completion of the temperature recording, the dentinal-cementum thickness at each sites where thermocouples were attached was measured. The data were analyzed using one-way ANOVA followed by Scheffe's test and linear regression test. The results were as follows. 1. When the temperature was set at 150℃, 200℃, 250℃ and 300℃ on the digital display of System B HeatSource, the real temperature of the plugger at the 1㎜ point from the tip revealed 130.82±2.96℃, 158.00±5.26℃, 215.92±6.91℃ and 249.88±3.65℃ respectively. 2. The position of 8 ㎜ from the anatomical apex showed the highest temperature increase at each temperature settings and it was significantly higher than those of other positions (p<0.01). The temperature rise was constantly increased toward coronal portion from apex of the root. 3. The maximum temperature increase on the root surface was 2.37±0.09℃ at 150℃ setting, 3.11±0.12℃ at 200℃ setting, 3.93± 0.09℃ at 250℃ setting and 5.69± 0.15℃ at 300℃ setting. These results suggest that it be relatively kind to the supporting tissues of the root that the root canal is obturated using continuous wave of condensation technique at 150℃, 200℃, 250℃ and 300℃ temperature settings on digital display of System B HeatSource.

Continuous Wave of Condensation Technique으로 근관충전시 치근면 온도상승 분석

김영주,황윤찬,김선호,황인남,최보영,정영진,정우남,오원만 大韓齒科保存學會 2003 Restorative Dentistry & Endodontics Vol.28 No.4

This study was conducted to evaluate the temperature rise on the root surface while the root canal is being obturated using continuous wave of condensation technique. Maxillary central incisor was prepared for repeated canal obturation. Ten thermocouples (Omega Engineering Inc., Stanford, USA) were placed at 1mm increment from the anatomical root apex. The real temperature of Buchanan plugger was recorded before insertion into the root canal. The root canal was obturated with continuous wave of condensation technique as described by Buchanan and the root surface temperature was recorded during obturation at 150℃, 200℃, 250℃ and 300℃ temperature settings of System B HeatSource (Model 1005, Analytic technologies, Redmond, WA, USA). After completion of the temperature recording, the dentinal-cementum thickness at each sites was measured. The data were analyzed using one-way ANOVA followed by Scheffe's test and linear regression test. The results were as follows. 1. When the temperature was set at 150℃, 200℃, 250℃ and 300℃ on the digital display of System B HeatSource, the real temperature of the plugger at the 1mm point from the tip revealed 130.82±2.96℃ 158.00±5.26℃, 215.93±6.91℃ and 249.88±3.65℃ respectively. 2. The position of 8 mm from the anatomical apex showed the highest temperature increase at each temperature settings and it was significantly higher than those of other positions (p<0.01). The temperature rise was constantly increased toward coronal portion from apex of the root. 3. The maximum temperature increase on the root surface was 2.37±0.09℃ at 150℃ setting, 3.11±0.12℃ at 200℃ setting, 3.93±0.09℃ at 250℃ setting and 5.69±0.15℃ at 300℃ setting respectively. These results suggest that it be relatively kind to the supporting tissues of the root that the root canal is obturated using continuous wave of condensation technique at 150℃, 200℃, 250℃ and 300℃ temperature settings on digital temperature display of System B HeatSource.

대동맥 협착증과 동반된 출혈성 위장관 동정맥 기형에서 Estrogen-Progesterone 치료 1예

김도연,김화정,김효정,남준식,박수영,박영미,신정은,주미순,황민규,정혜경,손혜영,이선영,이한주 大韓消化器內視鏡學會 1999 Clinical Endoscopy Vol.19 No.부록2

Removal of Cochlodinium polykrikoides using a novel material produced from sediment - A field study

Young一Chae Song,S. Sivakumar,Sung-Chung Ko,Eung-Ju Hwang,Qtae Jo 한국항해항만학회 2007 한국항해항만학회 학술대회논문집 Vol.2 No.추계

The present study was conducted in three fields at Namhae to examine the removal efficiency of organic free, heavy metal immobilized sediment on Cochlodinium polykrikoidesand on sea water quality. The present study results concluded that removal efficiency was depends on the initial number of red tide cells. There was no drastic change in the sea water quality after sediment spray. For the comparison of effectiveness of betonite, zeolite and lime were mixed with sediment did not show any marked difference in removal. Finally, the present study evaluated 5Og/m² sediment is Sufficient to remove 100% cells density, even though various environmental factors are interfering the mechanism.

槐花에 關한 文獻的 考察

朱榮丞,黃成淵 又石大學校 1998 論文集 Vol.20 No.-

In order to strengthen objectivity and availability of oriental herb medicine, the standard formula for herbs has been attempted to set up by documentary testing. original herbs which were recorded in authorized document. The object herb midicine is SOPHORAE FLOS. Specially the internal and external morphological standard in this study is expected to supply the search for several physiochemical reaction, biological reaction, determination of indicator material and indicator material and identification of gene with basic sources in the future. As for the supplement about this search, considering that many kinds of same genus-degree of relatedness are being current now, it is necessary that each herb should be collected only after identifying and that the succeeding search of each herb should be proceeded for the regular establishment of internal and external standard.

폐목질을 사용한 모르터의 물성에 관한 기초적 연구

황병준,김영주,강태경,정근호,임서형,정상진 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

Recently, as the alternatives to preserve environment such as effective usage of wastes or unusable resources are drawing attentions, researches and measures for the two tasks, which are reuse of waste wood and development of eco friendly materials, are being examined and established in various fields. However, they are still insufficient. Therefore, in this study, for the efficient application of waste woods and eco-friendly effects, mortar was produced using sawdust as the waste wood and mineral material cement for combination, in order to produce inorganic boards using waste woods, which were made when sawing. This study attempted to suggest a basic material about the physical properties of mortar, which used waste woods, after examining the features of wood mixture rate, water-cement rate, congelation according to the mixture rate of the setting accelerator, specific gravity, compression intensity, and bending intensity as experiment factors.

農民所得增大를 위한 고구마의 栽培와 利用에 관한 硏究

黃鍾奎,梁熙天,崔定植,權涌周 全北大學校 1977 論文集 Vol.19 No.-

New varieties of sweet potato Sinmi and Hwangmi were cultivated in the reclaimed hilly area of four kinds of soil series in Jeonbug province and their growth conditions such as cutting time, row spacing, application of fertilizers and plant growth regulators and covering effect were investigated. Besides these studies on cultivation of sweet potatoes, experiments on the change of chemical components of sweet potato tubers, adaptibility for storage and drying of sliced sweet potato tubers were carried out. The results are summarized as follows : 1. The early cutting of May 20, alley of 90 X 20cm, application of potassium(28kg/10a)and covering produced the high yield of sweet potatoes. The apllication of OED green did not increase the yield of sweet potatoes, 2. The yield of Hwangmi was higher than that of Sinmi. These two varieties of sweet potatoes grew well in all the test soil series except Bansan. By early cutting of May 20, the highest yield of Hwangmi was obtained in Songjung series soil and the highest yield of Sinmi was in Yesan. 3. Starch content was higher in Sinmi than in Hwangmi while yield of starch per unit area was high in Hwangmi because of its high yield of sweet potato tubers. Both Hwangmi and Sinmi showed very high water content of more than 70 per cent. The highest yield of total solid matter from Sinmi was on September 15 and that from Hwangmi on September 30. Sinmi and Hwangmi harvested on September 30 showed the highest starch content. 4. Variation in water content, starch, soluble sugar, protein and fat content during storage was minimum in the sweet potatoes stored in the temperature controlled storage chamber and was maximum in those stored in the cave under ground. As a result, percent of grade A sweet potatoes remaining was highest in the temperature controlled storage chamber and lowest in the cave under ground. 5. Hwangmi was more susceptible to Rhizopus nigricans than Sinmmi, especially under the humid condition. 6. Shape and thickness of slice did not affect the yield of dried sweet potatoes but affected the time needed for drying. Depending on the thickness and the shape of slice, variations of 36 hours and 12 hours in drying time were observed respectively. Drying table was most effective in drying of sweet potatoes and drying rack was also effective and required 2 days less time than mat. Dipping in water did not show any effect on drying time but improved the color of dried sweet potatoes.

先天性代謝異常症의 Pilot 硏究

黃泰周,崔榮倫,程文泰 全南大醫大 1985 전남의대학술지 Vol.22 No.4

부정교합 환자의 교정치료전 치근흡수에 관한 방사선학적 연구

황충주,송영윤 대한치과교정학회 1999 대한치과교정학회지 Vol.29 No.2

영구치의 치근흡수는 대개 특별한 상황, 즉 외상, 감염, 교정적 치아이동, 또는 전신질환의 경우에만 일어난다고 생각되어 왔지만, 정상적인 상황에서도 영구치의 치근흡수를 나타낼 수 있음이 보고된 이래로 치근흡수의 원인을 밝히려는 많은 연구가 있었다. 특히, 교정치료의 연관된 치근흡수의 빈도 및 심각도에 관한 많은 연구들이 있음에도 불구하고 실제로 교정치료를 위해 내원한 영구치열기의 부정교합 환자에서 교정치료전 치근흡수에 대한 연구는 없었다. 이에 본 연구는 교정치료를 위해 내원한 부정교합 환자 중에서 제3대구치를 제외한 모든 영구치의 치근 형성이 완료된 사람을 대상으로 전치부는 평행촬영법으로 촬영한 구강내 치근단 방사선 사진을, 구치부는 파노라마 방사선 사진을 이용하여 교정치료전 치근흡수의 빈도 및 삼각도를 분석하였다. 본 연구에서는 개개 치아에서 치근흡수의 빈도 및 심각도와 나이, 성별, Angle씨 분류법에 따른 부정교합 분류, 수평피개 및 수직피개, 상하악 전치부 치축각도 등의 분류에 따른 치근흡수의 빈도 및 심각도, 그리고 개개 치아에서 나타나는 부정교합의 특징 및 뚜렷한 교합마모면과 치근흡수의 빈도에 대해서 분석해 보아 다음과 같은 결론을 얻었다. 1. 본 연구에서 조사된 모든 사람에서 하나 이상의 치아에서 치근흡수를 나타내었고, 총 22.099개의 치아 중에서 7.920개의 치아, 즉 35.84%에서, 또 남성보다는 여성에서 빈도가 높았다(p<0.01). 2. 개개 치아에서의 치근흡수 감수성은 전체적인 이환치아에 대해서는 하악 전치, 상악 전치 순으로 감수성이 높았지만, 뚜렷한 치근흡수에 대해서는 상악 중절치, 상악 제 1소구치, 상악 측절치 순으로 감수성이 높았다. 3. 상하악 전치의 치축 각도에 대해서는 상악 전치 치축 각도가 클수록 상악 4전치의 치근 흡수에 미치는 영향이 컸고, 하악 전치 치축 각도가 클수록 하악 4 전치의 치근흡수에 미치는 영향이 컸다. 4. 수평피개보다는 수직피개가 치근흡수에 미치는 영향이 컸으며 개방교합의 경향이 커질수록 치근흡수의 빈도가 높았다. 5. 개개 차이에서 나타나는 부정교합의 특징에 대해서는 반대교합과 개방교합을 함께 나타내는 치아에서 치근흡수의 빈도가 가장 높았다. This study was designed to evaluate the frequency and the severity of root resorption of the permanent teeth before orthodontic treatment by means of radiograph in the malocclusion patients. In this study the author analysed the frequency and the severity of root resorption in individual teeth, the relationships of the frequency and the severity of root resorption and age, sex, Angle`s classification, overjet, overbite, and maxillary and mandibular incisor inclination, and the relationships of the frequency of root resorption and the characteristics of malooclusion and marked occlusal attrition showed in individual teeth. The results were as follows. 1. All of the persons examined showed some evidence of root resorption in one or more of the permanent teeth, 35.84% of the teeth examined and more frequent in female group than male group(p<0.01). 2. On the susceptibility of the root resorption in individual teeth in this study, the author found the mandibular incisors and the maxillary incisors, in the order named, to be most susceptible in all affected teeth, but maxillary central incisors, maxillary first bicuspids, and maxillary lateral incisors, in the order named, were more susceptible to marked root resorption. 3. The more proclined maxillary incisors the more affected root resorption in four maxillary incisors and the more proclined mandibular incisors the more affected root resorption in four mandibular incisors. 4. Overbite more affected root resorption than overjet,and the higher tender to openbite the more frequent was root resorption. 5. On the characteristics of malooclusion showed in individual teeth, the openbite teeth combined with crossbite, were most frequent in root resorption.

Apt. 거주주부의 부엌공간과 식생활 가사작업에 대한 만족도 연구

황경애,주영애 진주산업대학교 1994 論文集 Vol.33 No.-

This study is to investigate the satisfaction of kitchen space and household work. 223 homemakers of upper and middle class residing in Seoul were slected for the survey. For the statistical analysis of data, frequency, Pearson's γ, F-test, regression and cronbach's α for reliability were performed. The satisfaction of kitchen space was significantly related to the satisfaction of household work. Significant differences in degree of satifaction of kitchen space could be found independent variables.