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Glass Ionomer시멘트에 의한 상아질구조변화에 관한 주사전자현미경적 연구
박성규,우이형,최대균,최부병,박남수,Park, S.K.,Woo, Y.H.,Choi, D.K.,Choi, B.B.,Park, N.S. 대한치과보철학회 1987 대한치과보철학회지 Vol.25 No.1
This study was designed to investigate the pulpal effects of the glass ionomer cement. (Lining cement, G-C Co. Japan) For this purpose, 10 cats were selected, and Class V cavities were prepared on canines of the cats. One experimental group was filled with glass ionomer cement and the other group was filled with zinc phosphate cement . (G-C Co, Japan) The animals of the experimental and control group were sacrificed at 1,2,3,4,6, weeks after the experiment. For comparison of reparative dentin formation pattern in direction of the pulpal and fractured lateral surface, each of them was observed with scanning electron microscope. The findings led to the following conclusions; 1. Reparative dentin of the glass ionomer cement and zinc phosphate cement filling groups were formed on the internal surface of dentin as the shape of hemispherical and spherical with a rough surface. 2. Some of reparative dentin of the glass ionomer cement filling group was started to form at 1 week after experiment, and at 6 weeks after experiment, it had been increased gradually in number and size. 3. Reparative dentin of zinc phosphate cement filling group was formed vigorously, however, gradually was decreased in number and size, and disappeared at 6 weeks after experiment. 4. During the formation of reparative dentin, peritubular dentins were indistinguishable. 5. The diameter of dentinal tubules of reparative dentin has been decreased, during the reparative dentin formed, and it became very irregularly at 6 weeks after experiment.
박성규,이민기,최진성,Park, S.G.,Lee, M.G.,Choi, J.S. 한국전자통신연구원 2005 전자통신동향분석 Vol.20 No.4
2004년, 개봉 39일만에 국내관객 1000만 명을 돌파하며 국내영화사상 신기록을 수립한 영화 ‘태극기 휘날리며’에선 사상 유례없는 10만여 명 이상의 피난 및 중공군 진격장면이 연출되었다. 그러나, 10만여 명이 나오는 장면을 찍기 위해 동원된 엑스트라는300여 명에 불과하다. 1982년작 영화 ‘간디’의 장례식에 동원된 30만 명의 엑스트라를 생각한다면 괄목할 발전이라 할 수 있다. 이와 같은 대규모 스펙터클 잠연이 영화에서 빈번히 활용될수록 첨단영상 장비에 대한 활용도는 제고될 것으로 예상된다.