Restorative Dentistry and Endodontics

  • 제27권4호
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  • Pages.403-410
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  • 2002
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  • 2234-7658(pISSN)
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  • 2234-7666(eISSN)
대한치과보존학회 (The Korean Academy of Conservative Dentistry)
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다양한 파장폭의 가시광선에 의해 중합된 복합레진의 미세경도와 변연누출도

MICROHARDNESS AND MICROLEAKAGE OF COMPOSITE RESIN CURED BY VISIBLE LIGHT WITH VARIOUS BAND OF WAVELENGTH

  • 박수만 (단국대학교 치과대학 보존학교실) ;
  • 이재용 (단국대학교 치과대학 보존학교실) ;
  • 한승렬 (단국대학교 치과대학 보존학교실) ;
  • 하상윤 (단국대학교 치과대학 보존학교실) ;
  • 신동훈 (단국대학교 치과대학 보존학교실)
  • Park, Soo-Man (Dept. of Conservative Dentistry, School of Dentistry, Dankook University) ;
  • Lee, Jae-Yong (Dept. of Conservative Dentistry, School of Dentistry, Dankook University) ;
  • Han, Seung-Ryul (Dept. of Conservative Dentistry, School of Dentistry, Dankook University) ;
  • Ha, Sang-Yoon (Dept. of Conservative Dentistry, School of Dentistry, Dankook University) ;
  • Shin, Dong-Hoon (Dept. of Conservative Dentistry, School of Dentistry, Dankook University)
  • 발행 : 2002.07.01
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초록

Several ways of curing are being tried to improve material's properties and reduce marginal gap. However, all are considering about the pattern of light intensity. It was noted from the preliminary study the change of light wavelength from filter changing may give an impact on material's property and microleakage. The object of this study was to verify the effect of filters with various wavelength width on the microhardness and microleakage of composite resin ; hybrid type of DenFil and submicron hybrid type of Esthet X. Composite resins were cured using 3 kinds of filter; narrow-banded(465-475 nm), mid-banded(430-470 nm), wide-banded(400-500 nm). After the estimation of microhardness. degree of dye penetration and the maximum gap from SEM evaluation were done between 4 groups that showed no difference in microhardness value of the lower surface . The results were as follows : 1 Adequate microhardness could not be gained with a narrow-banded filter irrespective of curing time. At the upper surface, DenFil should be polymerized with middle or wide-banded filter for 20 seconds at least, while Esthet X be col$.$ed with middle or wide-banded filter for 30 seconds at least to get simitar hardness value to control group. 2. There was little dye penetration in enamel margin, but all dentin margins skewed much more dye penetration irrespective of curing conditions. Although there was no statistical difference, groups cured with mid-banded filter for 40 seconds and with wide-width filter for 20 seconds showed relatively less dye penetration. 3. It was revealed from the SEM examination that group cured with wide-banded filter had the smallest gap without statistical significance. Spearman's rho test showed that the correlation between the results of dye penetration and SEM examination was very low. From these results, it could be concluded that curing with wide-width filter would be better than the other techniques, even though the curing technique using mid-width filter seems to have its own unique advantage.

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