Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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MICROTENSILE BOND STRENGTH OF SELF-ETCHING AND SELF-ADHESIVE RESIN CEMENTS TO DENTIN AND INDIRECT COMPOSITE RESIN

간접 복합레진 합착 시 자가부식형과 자가접착형 레진시멘트의 상아질에 대한 미세인장 결합강도

  • Park, Jae-Gu (Department of Conservative Dentistry, College of Dentistry, Chosun University) ;
  • Cho, Young-Gon (Department of Conservative Dentistry, College of Dentistry, Chosun University) ;
  • Kim, Il-Sin (Department of Dentistry, Graduated School of Chonnam National University)
  • 박재구 (조선대학교 치의학전문대학원 치과보존학교실) ;
  • 조영곤 (조선대학교 치의학전문대학원 치과보존학교실) ;
  • 김일신 (전남대학교 대학원 치의학과)
  • Received : 2010.02.01
  • Accepted : 2010.03.11
  • Published : 2010.03.31
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Abstract

The purpose of this study was to evaluate the microtensile bond strength (${\mu}TBS$), failure modes and bonding interfaces of self-etching and three self-adhesive resin cements to dentin and indirect composite resin. Cylindrical composite blocks (Tescera, Bisco Inc.) were luted with resin cements (PA: Panavia F 2.0, Kuraray Medical Inc., RE: RelyX Unicem Clicker, 3M ESPE., MA: Maxem, Kerr Co., BI: BisCem, Bisco Inc.) on the prepared occlusal dentin surfaces of 20 extracted molars. After storage in distilled water for 24 h, $1.0\;mm\;{\times}\;1.0\;mm$ composite-dentin beams were prepared. ${\mu}TBS$ was tested at a cross-head speed of 0.5 mm/min. Data were analyzed with one-way ANOVA and Tukey's HSD test. Dentin sides of all fractured specimens and interfaces of resin cements-dentin or resin cements-composite were examined at FESEM (Field Emission-Scanning Electron Microscope). In conclusion, PA and RE showed higher bond strength and closer adaptation than MA and BI when indirect composite blocks were luted to dentin using a self-etching and three self-adhesive resin cements.

본 연구는 간접 복합레진 수복물을 1종의 자가부식형 레진시멘트와 3종의 자가접착형 레진시멘트를 이용하여 상아질에 합착하였을 때 각 레진시멘트의 미세인장 결합강도와 결합계면의 차이를 평가하기 위하여 시행하였다. 발거된 상.하악 대구치 교합면 측 상아질에 Tescera 복합레진 블록을 레진시멘트(PA 군: Panavia F 2.0, RE 군: RelyX Unicem Clicker, MA 군: Maxem, BI 군: BisCem)를 이용하여 합착하였다. 증류수에 24시간 동안 보관한 후, 합착된 면의 단면적이 $1.0\;{\times}\;1.0\;mm$인 막대모양의 시편을 제작하여 각 시편에 분당 0.5 mm의 crosshead speed로 인장하중을 가하였다. 각 군의 미세인장 결합강도는 one-way ANOVA와 Tukey의 HSD 방법을 이용하여 비교하였다. FE-SEM 하에서 모든 파절편의 상아질 쪽 파절양상과 레진시멘트-상아질 및 레진시멘트-복합레진의 계면을 관찰하였다. 본 연구의 결과 간접 복합레진 블록을 레진시멘트로 상아질에 합착할 때 PA 군과 RE 군은 MA 군과 BI군보다 높은 결합강도와 긴밀한 접착 및 레진테그가 관찰되었고, 복합레진과 레진시멘트 간에는 간극이 관찰되었다.

Keywords

References

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