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KMID : 0362219940210010007
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Journal of The Korean Research Society for Dental Materials
1994 Volume.21 No. 1 p.7 ~ p.20
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STUDY ON THE BONDING ABILITY OF DENTIN BON AGENTS
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김철위
김명국/백기석/이용근
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Abstract
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In the study, the shear bond strength of dentin bonding agents to the extracted dentin surface was measured. six knds of dentin bonding agents and nine kinds of dental composite resins currently used in Korea were studied. Extracted premolar or
molar
tooth was embedded in acrylic resin and one of the nonocclusal surface of the crown was exposed by grinding.
The exposed surface was polished up # 600 silicone carbide paper and the secimen was soaked in Fusayama's artificial saliva more than 24 hours. After the exopsed dentin surface was air-dired in the case of dry technique and blotted with tissue
paper
softly in the case of wet technique, dentin bonding agent was applied and dental composite resin packed in gelatin capsule was bonded on it.
The specimens were stored in 37℃Fusayama's artificial saliva for 24 hours and then the attached composite resin nodule was detached with Instron Universal testing Machine woth the cross-head speed of 0.2 mm.min.
From the experiment, the following results were obtained :
1. the shear bond strength of Ab2 to the extracted dentin was 8.61~12.23 MPa and those values were not significantly different depending on the composite resins attached (p>0.05).
2. The shear bond strength of DH2 was 7.93~14.17 MPa, and that of SC2 was 9.75~15.13 MPa. With these dentin bonding aggents, the shear bond strength was not significantly different depending on the appliction technique (wet or dry bonding
)(p>0.05).
3. DH2 and SC2 generally showed high shear bond strength and DH2/ SUP(W,D) DH2/CRA(D). SC2/P50(W) and SC2/SUP(W) couples showed somewhat higher shear bond strength than others.
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KEYWORD
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