Restorative Dentistry and Endodontics

  • 제28권4호
  • /
  • Pages.354-359
  • /
  • 2003
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  • 2234-7658(pISSN)
  • /
  • 2234-7666(eISSN)
대한치과보존학회 (The Korean Academy of Conservative Dentistry)
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LED를 이용한 복합레진의 광조사시, 중합수축의 속도와 양, 미세경도에 관한 연구

THE AMOUNTS AND SPEED OF POLYMERIZATION SHRINKAGE AND MICROHARDNESS IN LED CURED COMPOSITES

  • 박성호 (연세대학교 치과대학 보존학교실) ;
  • 김수선 (연세대학교 치과대학 보존학교실) ;
  • 조용식 (연세대학교 치과대학 보존학교실) ;
  • 이순영 (연세대학교 치과대학 보존학교실) ;
  • 김도현 (연세대학교 치과대학) ;
  • 장용주 (연세대학교 치과대학) ;
  • 문현승 (연세대학교 치과대학) ;
  • 서정원 (연세대학교 치과대학) ;
  • 노병덕 (연세대학교 치과대학 보존학교실)
  • Park, Sung-Ho (Department of Conservative Dentistry, Yonsei University) ;
  • Kim, Su-Sun (Department of Conservative Dentistry, Yonsei University) ;
  • Cho, Yong-Sik (Department of Conservative Dentistry, Yonsei University) ;
  • Lee, Soon-Young (Department of Conservative Dentistry, Yonsei University) ;
  • Kim, Do-Hyun (College of Dentistry, Yonsei University) ;
  • Jang, Yong-Joo (College of Dentistry, Yonsei University) ;
  • Mun, Hyun-Sung (College of Dentistry, Yonsei University) ;
  • Seo, Jung-Won (College of Dentistry, Yonsei University) ;
  • Noh, Byung-Duk (Department of Conservative Dentistry, Yonsei University)
  • 발행 : 2003.07.01
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초록

This study evaluated the effectiveness of the light emitting diode(LED) units for composite curing. To compare its effectiveness with conventional quartz tungsten halogen (QTH) light curing unit. the microhardness of 2mm composite. Z250, which had been light cured by the LEDs (Ultralume LED2, FreeLight, Developing product Dl) or QTH (XL 3000) were compared on the upper and lower surface. One way ANOVA with Tukey and Paired t-test was used at 95% levels of confidence. In addition. the amount of linear polymerization shrinkage was compared between composites which were light cured by QTH or LEDs using a custom-made linometer in 10s and 60s of light curing, and the amount of linear polymerization shrinkage was compared by one way ANOVA with Tukey. The amount of polymerization shrinkage at 10s was XL3000 > Ultralume 2. 40. 60 > FreeLight, D1 (P<0.05) The amount of polymerization shrinkage at 60s was XL3000 > Ultralume 2, 60> Ultralume 2.40 > FreeLight, D1 (P<0.05) The microhardness on the upper and lower surface was as follows ; (equation omitted) It was concluded that the LEDs produced lower polymerization shrinkage in 10s and 60s compared with QTH unit. In addition. the microhardness of samples which had been cured with LEDs was lower on the lower surfaces than the upper surfaces whereas there was no difference in QTH cured samples.

키워드

참고문헌

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피인용 문헌

  1. Measurements of shrinkage stress and reduction of inter-cuspal distance in maxillary premolars resulting from polymerization of composites and compomers vol.29, pp.4, 2004, https://doi.org/10.5395/JKACD.2004.29.4.346
  2. The polymerization rate and the degree of conversion of composite resins by different light sources vol.29, pp.4, 2004, https://doi.org/10.5395/JKACD.2004.29.4.386