Restorative Dentistry and Endodontics
- Volume 20 Issue 1
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- Pages.351-361
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- 1995
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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 ACCORDING TO THE SURFACE TREATMENT OF THE BLAEACHED ENAMEL
표백된 법랑질의 표면처리방법에 따른 복합레진과의 전단결합강도에 관한연구
- Kim, Eun-Hee (Department of Conservative Dentistry, College Dentistry, Chosun University) ;
- Cho, Young-Gon (Department of Conservative Dentistry, College Dentistry, Chosun University) ;
- Hwang, Ho-Keel (Department of Conservative Dentistry, College Dentistry, Chosun University)
- Published : 1995.03.10
Abstract
The purpose of this study was to evaluate the shear bond strength of the composite resin bonded on the bleached enamel surface according to its surface treatment. 90 extracted human premolars were divided into six groups. : enamel unbleached (control group) and enamel bleached with 15% carbamide peroxide for 2 weeks (experimental groups: 1, 2, 3, 4 and 5). The surface of bleached enamel in all experimental groups was treated by following manners. Experimental group 1 : catalase immersion for 3 mimutes. Experimental group 2 : catalase immersion for 15 mimutes. Experimental group 3 : artificial saliva immersion for 1 hour. Experimental group 4 : artificial saliva immersion for 48 hours. Experimental group 5: surface reduction of the bleached enamel about 0.5mm-1mm with superfine diamond bur. Composite resin molds(3mm height, 3mm diameter) were bonded to the untreated enamel and treated. The shear bond strengths of composite resin bonded to enamel of each specimen were tested with universal testing machine at a crosshead speed of 5mm/min and 500Kg in full scale and analyzed statistically. The following results were obtained : 1. Control group had the highest shear bond strength with
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