Bond Strength of a Silicone Soft Lining Material to Poly(methyl methacrylate) Resin Treated with Maleic Anhydride and its Terpolymers |
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Authors: | Mehmet Turgut Orhan Murat Doğan Selda Keskin Arife Doğan Ali Boztuğ |
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Affiliation: | 1. Department of Prosthodontics , Faculty of Dentistry, Cumhuriyet University , Sivas, Turkey;2. Department of Chemistry , Middle East Technical University , Ankara, Turkey;3. Department of Prosthodontics , Faculty of Dentistry, Gazi University , Ankara, Turkey;4. Department of Chemistry , Cumhuriyet University , Sivas, Turkey |
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Abstract: | This study investigated the effectiveness of surface treatment of Poly (methyl methacrylate) (PMMA) denture base resin on tensile bond strength between PMMA/silicone-based soft liner. A total of 25 specimens were fabricated and assigned into five groups (n = 5). The surfaces of PMMA were treated with maleic anhydride, maleic anhydride-styrene-vinyl-acetate, n-butylmaleate-styrene-vinyl-acetate, or n-pentamaleate-styrene-vinyl-acetate prior to Primo adhesive primer application and silicone liner placement. The Primo adhesive primer on applied group untreated dentuse base resin served as control. The tensile test was performed using a universal testing machine. Fractured surfaces were observed under Scanning Electron Microscopy (SEM) and spectroscopic interpretation of the interfaces was done by Fourier Transform Infrared (FTIR). Test results showed that surface treatment increased interfacial strength giving the highest value for n-butylmaleate-styrene-vinyl acetate treated group. SEM micrographs revealed that the specimens with n-butylmaleate-styrene-vinyl-acetate and n-penta maleate-styrene-vinyl-acetate terpolymers underwent cohesive failure. FTIR analysis indicated secondary interactions such as hydrogen bonding, possibly on acrylic resin surfaces, caused by the use of maleic anhydride and its terpolymers, and the adhesive. |
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Keywords: | Infrared spectroscopy Maleic anhydride Poly (methyl methacrylate) Silicone-based soft liner Surface treatment Tensile bond strength Terpolymers |
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