Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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EFFECT OF INTERMEDIATE RESIN HYDROPHILICITY ON BOND STRENGTH OF SINGLE STEP ADHESIVE

중간레진의 친수성이 상아질 접착에 미치는 영향

  • Kim, Yong-Sung (Department of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University) ;
  • Park, Sang-Hyuk (Department of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University) ;
  • Choi, Gi-Woon (Department of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University) ;
  • Choi, Kyoung-Kyu (Department of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University)
  • 김용성 (경희대학교 대학원 치의학과 치과보존학교실) ;
  • 박상혁 (경희대학교 대학원 치의학과 치과보존학교실) ;
  • 최기운 (경희대학교 대학원 치의학과 치과보존학교실) ;
  • 최경규 (경희대학교 대학원 치의학과 치과보존학교실)
  • Published : 2007.09.29
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Abstract

The purpose of this study was to evaluate the bond strength of a new Single step system with different curing mode composites, and to evaluate the effect of the intermediate resins which have different hydrophilicity on bonding ability by means of the micro shear bond testing and TEM examination for the adhesive interface. The adhesive used in this study was an experimental single step system (Bisco Inc., Schaumburg IL). Experimental groups were produced by using six kinds of intermediate resin having different hydrophilicity that was hydrophilic, hydrophobic and most hydrophobic resin and as filled or not after applying adhesive. Each experimental group was further divided into two subgroups whether the adhesive was light cured or not. Dual cured composite (Bis Core, Bisco Ltd., Schaumburg, IL) was placed on the adhesive layer as light cure or self cure mode. The results or bond strength were statistically analyzed using one way ANOVA and multiple comparisons are made using Tukey's test at ${\alpha}\;<\;0.05$ level. The results of this study were as follows ; 1. The application of intermediate resin did not increase the bond strength for light cured composite. 2. The bond strength of an experimental adhesive with self cured composite was significantly increased by the application of intermediate resin layer. 3. The bond strength of adhesive was irrespective of the cure or not of itself before intermediate resin layer applied. 4. As applied hydrophilic resin layer was, the initial bond strength was higher than both hydrophobic and most hydrophobic one used but there was no significance. Using a single step adhesive with dual/self cured composite, the incompatibility between both of them should be solved by the application of intermediate hydrophobic resin to reduce the adhesive permeability. However, Single step adhesive can be used in the light cured composite restoration without any decrease of the initial bond strength.

단일과정 접착제를 이용함에 있어 복합레진과의 부적합성을 개선하고자 중간레진이 결합에 영향을 미칠 것으로 사료된다. Experimental single step system (Bisco Ltd., Schaumburg, IL)을 대조군으로 하고 6종의 중간레진을 접착제의 중합여부, 복합레진의 광중합-자가중합 여부로 분류하였다. 상아질에 대한 광중합 또는 자가중합형 복합레진의 결합강도를 측정하고 접착계면에 대한 투과전자현미경 관찰하여 다음과 같은 결론을 얻었다. 1. 중간레진의 적용은 광중합형 복합레진의 결합강도를 증가시키지 않았다. 2. 자가중합형 복합레진의 결합강도는 중간레진을 적용할 경우 증가하였다. 3. 중간레진의 적용 전 접착제의 중합여부는 결합강도의 변화에 영향을 미치지 않았다. 4. 중간레진이 친수성일 때 소수성 중간레진을 적용할 때 보다 높은 결합강도를 나타냈으나 통계적 유의차는 없었다. 광중합형 복합레진의 수복 시 단일과정 접착제를 사용하는 것은 초기 결합강도에 영향을 미치지 않으며, 자가중합형 복합레진을 단일과정 접착제와 사용할 때는 접착층의 투과도를 감소시키는 소수성의 중간레진을 적용하여 부적합성을 해소할 수 있을 것이다.

Keywords

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