Effect of silica layer on bonding strength of thermoplastic nylon to cold cure acrylic resin
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Abstract
Materials and Method: Forty five (45) specimens were prepared from flexible acrylic bonded to auto-polymerizing acrylic resin and divided into three groups according to the surface treatments as follows:
Group A: 15 specimens of flexible acrylic bonded with cold-cure acrylic by holes.
Group B: 15 specimens of flexible acrylic bonded with cold-cure acrylic by silica coated layer.
Group C: 15 specimens of flexible acrylic bonded with cold-cure acrylic by combination of holes and silica coated layer. All specimens were analyzed by using Instron testing machine.
Results: The result of this study showed that high mean values were obtained from group C (combination) while low mean values were obtained from B (silica coated layer).
Conclusion: It can be concluded that combination of mechanical surface treatment resulted in significant improvement in shear bond strength of flexible acrylic bonded with cold cure acrylic
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