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Effect of silica layer on bonding strength of thermoplastic nylon to cold cure acrylic resin

Author: Israa M. Hummoudi
Journal: Journal of baghdad college of dentistry مجلة كلية طب الاسنان بغداد ISSN: 16800087 Year: 2013 Volume: 25 Issue: 3 Pages: 24-27
Publisher: Baghdad University جامعة بغداد

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Abstract

Background: The combination of thermoplastic nylon resin materials and auto polymerizing resin is necessary in somesituation for repair and adjustment. This study evaluated shear bond strength between thermoplastic nylon material(flexible) and auto polymerizing acrylic resin subjected to holes and silica coated layer.Materials and Method: Forty five (45) specimens were prepared from flexible acrylic bonded to auto-polymerizingacrylic 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 coatedlayer. 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 lowmean values were obtained from B (silica coated layer).Conclusion: It can be concluded that combination of mechanical surface treatment resulted in significantimprovement in shear bond strength of flexible acrylic bonded with cold cure acrylic

Keywords

Thermoplastic nylon --- silica --- shear bond --- hole

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