Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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Effect of the additional application of a resin layer on dentin bonding using single-step adhesives

중간층 레진 적용이 단일 접착과정 상아질 접착제의 접착에 미치는 영향

  • Choi, Seung-Mo (Dept. of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University) ;
  • Park, Sang-Hyuk (Dept. of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University) ;
  • Choi, Kyung-Kyu (Dept. of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University) ;
  • Park, Sang-Jin (Dept. of Conservative Dentistry, Division of Dentistry, Graduate of Kyung Hee University)
  • 최승모 (경희대학교 대학원 치의학과 치과보존학교실) ;
  • 박상혁 (경희대학교 대학원 치의학과 치과보존학교실) ;
  • 최경규 (경희대학교 대학원 치의학과 치과보존학교실) ;
  • 박상진 (경희대학교 대학원 치의학과 치과보존학교실)
  • Published : 2007.03.31
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Abstract

The purpose of this study was to prove that an intermediate resin layer (IRL) oan increase the bond strength to dentin by reducing the permeability of single-step adhesives. Flat dentin surfaces were created on buccal and lingual side of freshly extracted third molar using a low-speed diamond saw under copious water flow. Approximately 2.0 mm thick axially sectioned dentin slice was abraded with wet #600 SiC paper. Three single-step self-etch adhesives; Adper Prompt L-Pop (3M ESPE, St Paul, MN, USA), One-Up Bond F (Tokuyama Corp, Tokyo, Japan) and Xeno III (Dentsply, Konstanz, Germany) were used in this study. Each adhesive groups were again subdivided into ten groups by; whether IRL was used or not; whether adhesives were cured with light before application or IRL or not; the mode of composite application. The results of this study were as follows; 1. Bond strength of single-step adhesives increased by an additional coating of intermediate resin layer, and this increasement was statistically signigicant when self-cured composite was used (p < 0.001). 2. When using IRL, there were no difference on bond strengths regardless the curing procedure of single-step adhesives. 3. There were no significant difference on bond strengths between usage of AB2 or SM as an IRL. 4. The thickness of Hybrid layer was correlated with the acidity of adhesive used, and the nanoleakage represented by silver deposits and grains was examined within hybrid and adhesive layer in most of single-step adhesives. 5. Neither thickness of hybrid layer nor nanoleakage were related to bond strength.

본 연구는 단일 접착과정 상아질 접착제와 복합레진 사이에는 부적합성이 존재하며, 이를 개선하기 위해 중간 레진층이 필요하다는 가설을 규명하기 위해 시행되었다. 발치된 치아의 협설측 상아질에 3종의 단일 접착과정 상아질 접착제를 도포 후 광중합, 2종의 중간 레진층 적용, 광중합 또는 자가중합형 복합레진의 사용여부에 따라 30개의 실험군으로 분류하였다. 미세전단 결합강도를 측정하고 투과전자현미경 (TEM)을 이용하여 접착계면에서의 미세 누출과 수분의 이동경로를 관찰하여 접착제의 투과성을 평가하여 다음과 같은 결론을 얻었다. 중간 레진층을 적용 시 접착층의 투과도가 감소되었고 복합레진에 대한 단일 접착과정 상아질 접착제의 결합강도가 증가되었다. 따라서 시간 절약 및 간단한 접착과정을 선호하여 단순화된 상아질 접착제를 선택하는 것은 재고되어야 한다.

Keywords

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