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Soft chelating irrigation이 GP/AH Plus로 충전된 근관의 sealing ability에 미치는 영향에 대한 평가
유이숙,김태균,이광원,유미경 대한치과보존학회 2009 Restorative Dentistry & Endodontics Vol.34 No.6
본 연구의 목적은 glucose leakage test를 이용하여 soft chelating irrigation이 근관 충전의 sealing ability에 미치는 영향을 평가하는 것이다. 발치된 45개의 단근치를 수집하여 치관부를 잘라내 치근이 총 13mm가 되게 하였다. 근관은 K3 NiTi 구동 기구를 사용하여 성형하고 #45/.06 taper까지 확대하였다. 3개의 실험군(n=13)과 2개의 대조군(n=3)으로 나누었다. 실험군은 다음의 세척 방법으로 처리하였다. 1군, 2.5% NaOCl로 세척; 2군, 2.5% NaOCl로 세척 후 17% EDTA로 최종 세척; 3군, 2.5% NaOCl과 15% HEBP 혼합 용액으로 세척, 근관은 gutta-percha와 AH Plus를 사용하여 측방가압으로 충전하였다. , 습도 100%에서 7일 동안 보관하고 glucose leakage model을 이용하여 치관부로부터 치근부 방향의 미세누출을 정량화하였다. 1, 4, 7, 14, 21, 28일 째 누출된 glucose의 농도를 spectrophotometry로 측정하였다. 분석 결과 모든 실험군에서 실험 기간 동안 누출이 증가하는 경향이 있었다. HEBP처리군은 실험 기간 동안 EDTA처리군과 유의한 차이를 보이지 않았다. HEBP처리군은 21일 이후부터 도말층으로 덮인 NaOCl처리군에 비해 유의하게 낮은 누출을 보였다. HEBP로 처리된 상아질은 EDTA로 처리된 상아질과 비슷한 양상의 폐쇄를 보였으나 도말층이 남아있는 상아질보다는 우수한 sealing ability를 나타냈다. 그러므로 약한 킬레이트제인 HEBP는 EDTA의 대안이 될 수 있을 것이다. The purpose of this study was to evaluate the effect of soft chelating irrigant on the sealing ability of root fillings by using a glucose leakage test. A total of 45 single-rooted teeth were selected for the study. The teeth were decoronated leaving a total length of 13mm. The root canals prepared using K3 NiTi rotary instruments to an apical dimension of size 45(0.06 taper). The specimens were then randomly divided into 3 experimental groups of 13 roots each and 2 control groups of 3 roots each. Specimen in each group were prepared with different irrigation protocols : group 1, 2.5% NaOCl; group 2, 2.5% NaOCl and 17% EDTA: group 3, 2.5% NaOCl and 15% HEBP. The root canals were filled with gutta-percha and AH Plus sealer using lateral condensation. After 7 days in , 100% humidity, the coronal-to-apical microleakage was evaluated quantitatively using a glucose leakage model. The leaked glucose concentration was measured with spectrophotometry at 1, 4, 7, 14, 21 and 28 days. There was a tendency of increase in leakage in all experimental groups during experimental period. HEBP-treated dentin showed no significant difference with EDTA-treated dentin during experimental period. From the 21th day onward, HEBP-treated dentin showed significantly lower leakage than smear-covered dentin. HEBP-treated dentin displayed a similar sealing pattern to EDTA-treated dentin and a better sealing ability than smear-covered dentin. Consequently, a soft chelator(HEBP) could be considered as the possible alternative to EDTA.
이숙연(Sook-Yun Lee),유봉신(Bong-Shin Yu),문혜령(Hye-Ryoung Mun),김성경(Sung Kyung Kim) 한국생약학회 1982 생약학회지 Vol.13 No.3
Nine trace elements in Bear Galls(Fel Ursi) studied in this paper are Na, Mg, K, Ca, Cu, Zn, Fe, Pb and Ge. The contents of Na, Mg, K, Ca, Cu, Zn, Fe, Pb are determined by atomic absorption spectrometry and Ge is determined by graphite atomic absorption spectrometry. In both methods, the sample is digested with nitric-perchloric acid and then ashed. The results of analysis are shown in table and the result obtained from this study are as follows. a. The highest content of trace element of Bear Gall is Na and other elements are getting lower in order of K, Mg, Ca, Ge, Zn, Fe, Cu, and Pb. b. Particularly the content of Ge in Bear Gall was determined.
Tc-Phytate로 확인된 복막 투석액 전이성 수흉에서 흉막 유착술 치험
이태원,김명재,황이숙,김권기,유계수 대한신장학회 1989 Kidney Research and Clinical Practice Vol.8 No.1
Acute or recurrent massive hydrothorax as a complication of CAPD was first reported in 1967 by Unger et al. After that, several additional cases were reported. Talc poudrage and intrapleural tetracycline induced pleurodesis have been attempted to solve the problem. We report a successful case of intrapleural instillation of tetracycline to pleural symphysis and prevent recurrence of CAPD-related hydrothorax which was proved by radioisotope scanning with$quot; Tc-phytate in a patient who refused to change the mode of dialysis.
유기제약 분과학회 Knoevenagel Condensation에 관한 연구
권인선,조금희,은미현,이숙연,유금옥 이화여자대학교약학회 1989 梨花藥學硏究 Vol.- No.28
2-Amino 3-cyano4,5-dimethyl furane(Ⅰ) condensed from acetoin of α-hydroxyketon derivatives and the malondinitril, and then hydrolyzed to 2-amino carbamyl 4,5-dimethyl furane(Ⅱ) in poly phosphoric acid. In the same reaction condensed 1-N-phenyl 2-amino 3-cyano 4,5-dimethyl pyrrole(Ⅵ) condensed from 3-N-phenyl amino 2-butanone(Ⅲ) of α-aminoketone derivatives and malondintrile, and then hydrolyzed to 1-N-phenyl 2-amino 3-carbamyl 4,5-dimethyl pyrrole(Ⅴ)
Knoevenagel Condensation에 관한 연구
권인선,조금희,은미현,이숙연,유금옥 이화여자대학교 약학회 1989 梨花藥學會誌 Vol.- No.28
2-Amino 3-cyano4,5-dimethyl furane(Ⅰ) condensed from acetoin of α-hydroxyketon derivatives and the malondinitril, and then hydrolyzed to 2-amino carbamyl 4,5-dimethyl furane(Ⅱ) in poly phosphoric acid. In the same reaction condensed 1-N-phenyl 2-amino 3-cyano 4,5-dimethyl pyrrole(Ⅵ) condensed from 3-N-phenyl amino 2-butanone(Ⅲ) of α-aminoketone derivatives and malondintrile, and then hydrolyzed to 1-N-phenyl 2-amino 3-carbamyl 4,5-dimethyl pyrrole(Ⅴ)