Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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EFFECT OF DENTIN SURFACE WETNESS ON TENSILE BOND STRENGTH OF SELF ADHESIVE RESIN CEMENTS

상아질 표면 젖음성이 수종 자가접착레진시멘트의 인장접착강도에 미치는 영향

  • Yoon, Sung-Young (Department of Conservative Dentistry, College of Dentistry, Kangnung National University) ;
  • Park, Se-Hee (Department of Conservative Dentistry, College of Dentistry, Kangnung National University) ;
  • Kim, Jin-Woo (Department of Conservative Dentistry, College of Dentistry, Kangnung National University) ;
  • Cho, Kyung-Mo (Department of Conservative Dentistry, College of Dentistry, Kangnung National University)
  • 윤성영 (강릉대학교 치과대학 치과보존학교실) ;
  • 박세희 (강릉대학교 치과대학 치과보존학교실) ;
  • 김진우 (강릉대학교 치과대학 치과보존학교실) ;
  • 조경모 (강릉대학교 치과대학 치과보존학교실)
  • Published : 2009.03.31
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Abstract

The purpose of this study was to compare the tensile bond strength of several self-adhesive resin cements bonded to dentin surfaces with different wet conditions. Three self-adhesive resin cements: Rely-X Unicem (3M ESPE, St. Paul, MN. USA). Embrace Wetbond (Pulpdent. Oakland. MA. USA). Maxcem (Kerr. Orange. CA. USA) were used. Extracted sixty human molars were used. Each self-adhesive resin cement was adhered to the dentin specimens (two rectangular sticks from each molar) in different wet conditions. Tensile bond strength were measured using universal testing machine (EZ Test. Shimadzu corporation. Kyoto. Japan) at a crosshead speed of 1.0mm/min. After the testing. bonding failures of specimens were observed by Operative microscope (OPMI pro, Carl Zeiss. Oberkochen, Germany). T-test was used to evaluate the effect of dentin surface wetness. One-way ANOVA test was used to evaluate the tensile bond strength of self-adhesive resin cements in the same condition. Scheffe's test was used for statistical analyzing at the 95% level of confidence. The result showed that wetness of dentin surface didn't affect tensile bond strength of self-adhesive resin cements and Maxcem showed the lowest tensile bond strength.

본 연구의 목적은 다른 표면 젖음성을 갖는 상아질에 대한 수종의 자가접착레진시멘트의 인장접착강도를 비교하고자 하는 것이다. 이번 실험을 위해 Rely-X Unicem (3M, ESPE, St. Paul, MN, USA), Embrace Wetbond (Pulpdent, Oakland, MA, USA), Maxcem (Kerr, Orange, CA, USA) 3 종의 자기접착레진시멘트를 사용하였다. 발거한 상, 하악 대구치 60개를 미세절단기 (Acutom P-50, Struers, Copenhagen, Benmark)를 이용해 한 치아에서 $2mm{\times}2mm{\times}7mm$의 치아 시편 두개씩 얻었다. 상아질 표면을 건조 그룹은 10초간 강한 공기로 건조시켰고, 습윤 그룹은 과잉의 수분을 2 초간 거즈로 압박해 제거하였다. 상아질 표면의 젖음성을 달리한 시편에 자가접착레진시멘트를 접착한 후 상온의 상대습도 100% 상태에서 24시간 보관했고, 만능시험기 (EZ Test, Shimadzu corporation, Kyoto, Japan)를 이용해 인장접착강도를 측정했고, 분리된 접착면의 파절양상을 근관 치료용 현미경 (OPMI pro, Carl Zeiss, Oberkochen, Germany)을 이용해 20 배의 배율로 관찰하였다. $SPSS^{TM}$ Ver 10.0 (SPSS Inc., Chicago, IL, USA)을 사용하여 동일한 자가접착레진시멘트에서 상아질 젖음성에 따른 인장접착강도를 T-test로 비교하였으며, 각 자가접착레진시멘트간의 인장접착강도를 One way ANOVA test로 비교 분석하고 95% 유의수준에서 Scheffe's test로 사후검정 하였다. 실험 결과 자가접착레진시멘트의 인장접착강도는 상아질 젖음성에 영향을 받지 않았으며, 상아질 표면 젖음성과 상관없이 Maxcem의 인장접착강도가 Unicem과 Embrace의 인장접착강도보다 유의성 있는 낮은 값을 나타내었다. 또한 모든 시편의 분리된 접착면은 접착실패 양상을 나타내었다. 이상의 실험 결과로 볼 때 자가접착레진시멘트는 상아질 표면 젖음성에 상관없이 사용할 수 있을 것이라고 생각된다.

Keywords

References

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