Restorative Dentistry and Endodontics
- Volume 12 Issue 2
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- Pages.45-53
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- 1987
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- 2234-7658(pISSN)
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- 2234-7666(eISSN)
STUDY OF THE TENSILE BOND STRENGTH OF COMPOSITES RESINS APPLIED TO ACID-ECHED ENAMEL
산처리(酸處理)된 Enamel표면(表面)에 대(對)한 Composite resin의 인장접착강도(引張接着强度)에 관(關)한 연구(硏究)
- Lee, Young-Kun (Department of Operative, Division of Dentistry, Kyung Hee University) ;
- Min, Byung-Soon (Department of Operative, Division of Dentistry, Kyung Hee University) ;
- Choi, Ho-Young (Department of Operative, Division of Dentistry, Kyung Hee University) ;
- Park, Sung-Jin (Department of Operative, Division of Dentistry, Kyung Hee University)
- Published : 1987.08.31
Abstract
The purpose of this study was to evaluate the tensile bond strength between composite resin and the human enamel. Three composite resin systems, two chemical (Clearfil Posterior, and Clearfil Posterior-3) and one light cure (Photo Clearfil-A), used with and without an intermediate resin (clearfil bonding agent), were evaluated under different amounts of load (10g, 200g and 200g for a moment) for in vitro tensile bond strength to acid-eched human enamel. Clinically intact buccal or lingual surfaces of 144 freshly extracted human permanent molars, embedded in acrylic were flattened with No #600 carborundum discs. Samples were randomly assigned to the different materials and treatments using a table of random numbers. Eight samples were thus prepared for each group(Table 2) these surfaces were etched with an acid etchant (Kurarey Co. Japan) in a mode of etching for 30 seconds, washing for 15 seconds, and drying for 30-seconds. During the polymerization of composite resin on the acid-etched enamel surfaces with and without bonding agent 10-gram, 200 gram and temporary 200 gram of load were applied. The specimens were stored in 50% relation humidity at
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