Restorative Dentistry and Endodontics
- Volume 18 Issue 1
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- Pages.114-121
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- 1993
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- 2234-7658(pISSN)
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- 2234-7666(eISSN)
A STUDY ON THE SHEAR BOND STRENGTH OF THE COMPOSITE RESIN TO AMALGAM ACCORDING TO AMALGAM SURFACE TREATMENT METHODS
아말감의 표면처리에 따른 복합레진과의 전단결합 강도에 관한 연구
- Park, Mun-Hee (Department of Conservative Dentistry, College of Dentistry, Chosun University) ;
- Cho, Young-Gon (Department of Conservative Dentistry, College of Dentistry, Chosun University) ;
- Hwang, Ho-Keel (Department of Conservative Dentistry, College of Dentistry, Chosun University)
- Published : 1993.04.25
Abstract
The purpose of this study was to evaluate the effect on treatment methods to shear bond strength between composite resin and amalgam when the alloy surface was finished with a diamond wheel or an sandblaster. Forty round acrylic cylinders were fabricated with a diameter of 33mm and a height of 20mm to fit into the device used during shear bond strength testing. A round undercut cavity (diameter, 8mm: depth, 2.5mm) was prepared in the center of the acrylic surface and the cavity was restored using a amalgam. A total of 40 acrylic cylinders with amalgam were divided into 4 groups according to treatment method. The group treatment were as follows : Group 1 : acid etching after finishing the amalgam with diamond wheel Group 2 : no acid etching after finishing the amalgam with diamond wheel Group 3 : acid etching after sandblasting the amalgam Group 4 : no acid etching after sandblasting the amalgam The shear bond strength of composite resin bonded to amalgam of each specimen was tested with a universal testing machine at a crosshead speed of 0.5mm/min and 500kg in full scale. The results were as follow: 1. After diamond finishing, the non-acid etching group had highest shear bond strength with 7.29kg/
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