Restorative Dentistry and Endodontics
- Volume 20 Issue 1
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- Pages.193-213
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- 1995
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- 2234-7658(pISSN)
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- 2234-7666(eISSN)
THE STUDY OF CHANGE IN SURFACE HARDNESS AND TEXTURES OF COMPOSITE RESIN DUE TO ENZYMATIC ACTION
수종 복합레진에 있어서 효소 역할에 의한 표면 경도와 조도 변화에 관한 연구
- Kim, Mi-Ri (Department of Conservative Dentistry, College of Dentistry, Seoul National University) ;
- Lee, yung-Jong (Department of Conservative Dentistry, College of Dentistry, Seoul National University)
- Published : 1995.03.10
Abstract
The purpose of this study is to investigate a possible contribution of nonspecific esterases, which occur in the oral cavity, to the degradation of ester bonds in polymethacrylates. One of the problems connected with the use of composite resins for restorations is their inadequate resistance to wear. It has been shown that methacrylate hydrolysis can be catalyzed by enzymes and that a carboxylic hydrolase (porcine liver esterase) catalyzed the hydrolysis of several mono - and dimethacrylates. The softening effect on a BISGMA/TEGDMA polymer induced by hydrolase will accelerate the in vivo wear of the polymer. Porcine liver esterase (EC 3.1.1.1) 3.2 mol/L
Keywords
- Porcine liver eseterase;
- Composite resin;
- curing oven;
- Vickers hardness number;
- Profilometer;
- Stereoscopy