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KMID : 0378419940140120063
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Dental Focus
1994 Volume.14 No. 12 p.63 ~ p.74
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An Experimental Study on the Fatigue Fracture of Composiste Bond to Enamel Surface
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Abstract
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This study was to evaluate the tensile bond strength and fatigue life of composite bond to enamel surface. Three kinds of composite resin restorative materials including Prisms AP. H., Clearfil Photo-Posterior, and Z 100 were used for this study. Fatigue test was conducted under peak cyclic flexural stresses fo 5.98kg/mm´ and 5.42kg/md using the electro-dynamic type fatigue testing machine.
The obtained results were as follows :
1. Tensile bond strengths were 1.686 0.653kg/mm´ at Z100, 1.637 0.634kg/md at Prisma AP. H, and 1.584 0.361kg/mm´ at Clearfil Photo-Posterior, but didn´t show a significant difference (P>0.05).
2. Average fatigue life were 470,739 388,181 cycle at Z100, 195,010 306,921 cycle at Prisma AP. H, and 33, 219 93,756 cycle at Clearfil Photo-Posteiro under constant fatigue stress of 5.98kg/mm´, and Z100 was significant difference with Clearfil Photo Posteior(P<0.05).
3. Among the mode of failure for the specimens, most of failure was adhesive failure and mode of failuer for Z100 was throughly distributed, but mode of failure of Clearfil Photo-Posterior was entirely adhesive failure.
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