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.

Haemophilus influenzae 티올 과산화효소의 특성

황영선(Young Sun Hwang),김강화(Kanghwa Kim) 전남대학교 생활과학연구소 2000 生活科學硏究 Vol.10 No.-

Haemophilus influenzae HI0571 protein that shows homology to E. coli thiol peroxidase uses yeast thioredoxin system as an electron donor[Hwang. Y. S., Chae. H. Z., and Kim. K. (2000) J. Biochem. Mol. Biol. 33, 514~518]. The microorganism has two open, reading frames. HI1158 and HI0084, showing homology to a thioredoxin reductase and a thioredoxin, respectively. Both proteins consisting thioredoxin system were expressed in E. coli, and then the proteins were subsequently purified. The H. influenzae thioredoxin system showed 5.5’-dithiobis-(2-nitrobenzoic acid) reduction activity. H, influenzae HI0751 protein, thiol peroxidase was characterized using the thioredoxin system as an electron donor. The thiol peroxidase showed the thioredoxin dependent peroxidase activity. And glutamine synthetase protection activity of thiol peroxidase against Thiol/Fe³⁺/O₂ system was enhanced by addition of the thioredoxin. An antioxidant function of thiol peroxidase in intact cells was demonstrated by the observation that E. coli cells overexpressed with H. influenzae thiol peroxidase were less sensitive to growth inhibition by alkyl hydroperoxides.

외음부의 기저세포암

김보영 ( Bo Young Kim ),황선정 ( Sun Jung Hwang ),박병준 ( Byung Joon Park ),이은실 ( Eun Sil Lee ),한호섭 ( Ho Suap Han ),김용욱 ( Yong Wook Kim ),김태응 ( Tae Eung Kim ),노덕영 ( Duck Yeong Ro ),이안희 ( An Hi Lee ) 대한산부인과학회 2010 Obstetrics & Gynecology Science Vol.53 No.9

Basal cell carcinoma (BCC) is the most common human malignant neoplasm, accounting for 75% of all non-melanoma skin cancer. The incidence of BCC is strongly correlated with sun exposure as well as older age. Therefore, the vast majority of BCCs is observed in elderly patients on the sun-exposed skin of the head and neck with a frequency of more than 80%. BCC is very rare on sun-protected skin such as the perianal and genital regions and other etiologic factors must be considered in these cases. Although the pathogenesis of vulvar BCC is unclear, early diagnosis is very important. Because BCC in these areas sometimes seems innocuous, it is recommended that a biopsy of all suspect lesions be performed. We report a woman with BCC of the vulva treated with wide local resection and reviews the literatures on this subject.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

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

최근 10년간 조선대학교 부속치과병원 교정과에 내원한 부정교합 환자에 관한 역학적 연구(1990~1999)

황미선,윤영주,김광원 대한치과교정학회 2001 대한치과교정학회지 Vol.31 No.2

With socioeconomic development and change of esthetic recognition, the demand for orthodontic treatment and number of orthodontic patients has been increasing so rapidly. And frequency of malocclusion was changed. So this study was done in an attempt to provide an epidemiologic study so that we can accomodate their orthodontic needs adequately and to obtain the reliable quantitative iHormation regarding the characteristics of orthodontic patients. Distribution and trends were examined in 3,070 malocclusion patients who had been examined and diagnosed at Department of Orthodontics, Dental Hospital, Chosen University over 10 year-period from 1990 to 1999. The results were as follows : 1.The number of patients per year was increasing trend and higher visiting rate in female(56.5%) than in male(43.5%). 2.Age distribution had shown 7∼12 year-old group being the largest(37.9%) and each percentage of 13∼18, 19∼24, above-19, 0∼6 year-old group was 32.0%, 19.6%, 7.1%, 3.4%. 3.Hellman dental age rya which is completion of the permanent dentition showed the highest percentage in male and female. 4.Geographic distribution showed a majority of patients in Kwang Ju(71,0%). Group within the distance 1017n from Chosun Dental Hospital was 56.3% and group within 20km was 14.7%. 5.Anterior cross bite showed the highest percentage in chief complaints and percentage of Mn, prognathism and Protrusion of Mx. teeth was 12.6%, 12.2%. 6.Distribution In the types of malocclusion according to the Angle's classification had shown; 38.9% for Class 1,20.7% for Class II division 1, 2.0% for Class II division 2.384% for Class III. 7.In the dental vertical dysplasia according to the Angle's classification, deep bite was the most frequent in Class II div.1 and div. 2(24.3%, 56.7%) and open bite in Class III(21.4%). 8.In the skeletal sagittal dysplasia, 39.3% of skeletal ClassII was due to the undergrowth of the mandible and 46.3% of skeletal ClassIII was due to the overgrowth of the mandible. 9.Distribution in nrthodontlc treatment accoding to The extraction and nonextraclion had shown 66.9% for nonextraction case, 33.1% for extraction case, and four first bicuspids have been extracted in the highest percentage(38.6%). 10.Patients who had orthognathic surgery comprised 7.9%, with an Increasing trend.

高麗初期의 王位繼承

황선영 동의대학교 2004 인간과 문화 연구 Vol.- No.9

급성 포름알데히드 가스 흡입에 의한 흰쥐 후각상피의 형태학적 변화

백선용,전재기,문용석,황승영,노환중,고의경,왕수건 대한해부학회 1998 Anatomy & Cell Biology Vol.31 No.3

중학교 가정과 학습내용에 대한 예비중학생과 학부모의 인식

황선화,정영숙 한국 가정과 교육 학회 1995 한국가정과교육학회지 Vol.7 No.2

The purpose of this study was to investigate the recognition degrees of contents in Home Econimics textbook for middle school students among pre-middle school students and their parents. It is for developing better Home Econonmics textbook. Three objectives of this study were: 1) To find the recognition degrees of the fact that Home Economics subject is supposed to utilize for not only girls, but boys students in middle schools in 1996 among pre-middle shcool students and their parents. 2) To find the degrees of necesiity in each field of Home Economics subject among pre-middle school students and their parents. 3) To find the differences in recognition degrees of understandings, attitudes, and skill of Home Economics subject between pre-middle school students and their parents. Questionnaire survey metod was utilized to 1,205 sizth grade students and their parents in Pusan. The results of this study as follows; 1) It was low that the recognition degrees of the fact that Home Economics subject is supposed to utilize for both girls and boys in middle school among both pre-middle school students and their parents. This result implies that it is important to dissenminate the curriculum change in Home Economics practice to the public. 2) It was high that the recognition degrees of necessity in each field of Home Economics subject among pre-middle school students and their parents. Th recognition defree were different according to sociodemographic factors. That is, ① the recognition degrees of students were lower than their parents; ② the recognition degrees of parents who have high education were higher than those who have low education; ③ the recognition degree of an evirionmental field was highest. 3) There were little differences between pre-middle school students and their parents in the recognition degrees of understandings, attitudes, and skills of Home Economics subject: The recognition degrees of girls fathers showed higher scores than boys fathers those of in understandings and skills of Home Economics subject. The recognition degrees of girls fathers showed higher scores than those of girls in attitudes of Home Economics subject.