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KMID : 0353319980220020233
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Oral Biology Research
1998 Volume.22 No. 2 p.233 ~ p.244
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Effect on the shear vond strength of a compomer to dentin according to surface conditioning
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Abstract
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The purpose of this stud- was to evaluate the shear bond strength of the compoglass carvifil bonded on the dentin surface according to etching or non-etching and two time
application or three time application of single component.
Human non-carious 60 extracted 3rd molar were used. The occlusal dentin surfaces of all teeth were exposed with Diamond Wheel Saw and polished with Lapping & Polishing machine (South Bay Technology Co., U.S.A.).
The teeth were then distributed randomly into four groups of 15 teeth each and dentin surface were conditioned as following.
Control group : Non-etching, two times application of Syntac single component. (According to manufacture´s instruction)
Experimental group 1 Non-etching, three times application of Syntac single component. Experimental group 2 : Etching, two times application of Syntac single component. Experimenta group 3 : Etching, three times application of Syntac single component. Compoglass were bonded to exposed dentin surfaces and all samples were placed in
distilled water for 7 days.
The shear bond strengths were measured by universal testing machine (SHIMADAZU AUTOGRAPH. AGS-4D.. Japan).
The results were as follows
1. Experimental group 3 revealed the highest vlaue(30.754.74 MPa) and control group revealed the lowest value(14.85 - 2.69 MPa). There was significant difference of shear bond strength among four groups (P<0.01).
2. The acid-etching groups (experimental group 2, 3) had a higher shear bond strength than non etching groups (control group and experimental group 1).
3. The additional application of Syntac single component groups revealed a higher bond strength than two times application groups (control group and experimental group 2).
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