• Title/Summary/Keyword: 전재

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An Experimental Study on Microleakage in Light-activated Temporary Filling Materials (광중합형 임시충전재의 미세누출에 관한 실험연구)

  • Hwang, Su-Hyun;Yu, Ji-Su;Kim, Sun-Ju
    • Journal of dental hygiene science
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    • v.11 no.4
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    • pp.333-337
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    • 2011
  • The purpose of this experiment was to examine possibility of microleakage by water, temperature change, and bite force inside the mouth during the period of using light-activated temporary filling materials. 2 kinds of light-activated temporary filling materials were used in order to measure weight and compressive strength and to evaluate microleakage between filling material and cavity wall according to frequency of thermal circulation. First, Light-activated temporary filling material was increased the weight, which was measured according to the period of using. As for the result of comparing between products, the weight of Quicks was indicated to be higher. Second, Compressive strength of Spacer had significant difference depending on period of using. However, significant difference wasn't shown in the compressive strength of Quicks. In Spacer that showed significant difference, the compressive strength increased greatly in the difference of 3 days. Third. As for micro-leakage according to frequency of thermal circulation, the microleakage was indicated to be the highest in the group that carried out 7,000 times. The group with operation of 1,000 times and the group with operation of 3,000 times were indicated the statistically lower micro-leakage than the group with operation of 7,000 times. This study brought about a rise in micro-leakage depending on the passage in the period of using. However, it is obvious fact that micro-leakage increases according to the passage of time after restoration.

80년도 기업경영분석-경제기획원

  • Korea Petroleum Association
    • Korea Petroleum Association Journal
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    • no.11 s.9
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    • pp.83-92
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    • 1981
  • 이 자료는 경제기획원의 「81년 경제백서」에서 제3장 기업경영 및 중소기업부분중 기업경영분석 내용을 전재한 것이다.

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주요국 주유업계동향

  • Korea Petroleum Association
    • Korea Petroleum Association Journal
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    • no.8 s.174
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    • pp.76-85
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    • 1995
  • 이 자료는 이영희 지음「주유소경영 노하우」에서 일부 전재한 것이다. <편집자 주>

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해외 석유회사의 투자전략 (1)

  • Korea Petroleum Association
    • Korea Petroleum Association Journal
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    • no.2 s.204
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    • pp.73-83
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    • 1998
  • 이 자료는 석유개발공사 석유관계 자료집(통권 92호)에서 전재한 것임 <편집자 주>

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자동차와 환경

  • Korea Petroleum Association
    • Korea Petroleum Association Journal
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    • no.5 s.123
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    • pp.31-42
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    • 1991
  • 이 자료는 지난해 11월 13~14일 스위스 제네바에서 열린 「자동차산업과 환경」주제의 국제세미나에서 발표된 내용으로 자동차회보 4월호에서 전재한 것임 <편집자 주>

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