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KMID : 0362419950330040662
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Journal of Korean Academy of Prosthodontics
1995 Volume.33 No. 4 p.662 ~ p.684
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A study on the shear bond strength between resin-bonded retainers and enamel according to the adhesive resins and retention types
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Cho Mi-Sook
Yang Jae-Ho
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Abstract
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The purpose of this study was to evaluate the shear bond strength between various resin-bonded retainers and enamel according to the adhesive resins and retention types and observe the bond failure modes with scanning electron microscope (SEM). For this purpose, the following eight sub-groups were tested in shear bond strength : 1) electrochemically etched group (Verabond) using Panavia EX and Superbond C&B 2) tin-plated group (PG-S) using Panavia EX and Superbond C&B 3) salt-treated group (Verabond) using Panavia EX and Superbond C&B 4) mesh-treated group(Verabond) using Panavia Ex and Superbond C&B. Thermocycling test was conducted on the condition of 15 second dwell time each in 5℃ and 55℃ bath. Shear bond strength was measured by Instron Universal Testing Machine (Model 1125). @ES The obtained results were as follows: @EN 1. After thermocycling, the shear bond strengths of tin-plated group and electrochemically etched group were significantly greater than those of salt-treated group and mesh-treated group. And the shear bond strength of Panavia EX was greater than that of Superbond C&B with salttreated group and tin-plated group (p<0.05) 2. Before thermocycling, electrochemically etched group using Superbond C&B produced the greatest shear bond strength(p<0.01 3. The shear bond strength of electrochemically etched group using Superbond C&B was significantly decreased after thermocycling (p<0.01). 4. In observation of bond failure modes before thermocycling, Panavia EX highly exhibited enamel fracture. Tin-plated group using Superbond C&B exhibited adhesive failure between metal and resin and electrochemically etched group using Superbond C&B exhibited adhesive failure between enamel and resin. 5. In observation of bond failure modes after thermocycling, Panavia Ex exhibited cohesive failure and Superbond C&B exhibited adhesive failure between resin and metal.
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KEYWORD
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