Restorative Dentistry and Endodontics
- 제12권2호
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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)
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)
STUDY OF THE TENSILE BOND STRENGTH OF COMPOSITES RESINS APPLIED TO ACID-ECHED ENAMEL
- Lee, Young-Kun (Department of Operative, Division of Dentistry, Kyung Hee University) ;
- Min, Byung-Soon (Department of Operative, Division of Dentistry, Kyung Hee University) ;
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Choi, Ho-Young
(Department of Operative, Division of Dentistry, Kyung Hee University) ;
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Park, Sung-Jin
(Department of Operative, Division of Dentistry, Kyung Hee University)
- 발행 : 1987.08.31
초록
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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