Characterization Of Denture Base Poly (Methylmethacrylate) Reinforced With Alumina / Zirconia Particles

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dc.contributor.authoralHareb, Ahmed Omran Salem
dc.date.accessioned2018-08-28T00:46:10Z
dc.date.available2018-08-28T00:46:10Z
dc.date.issued2011-05
dc.description.abstractThe properties of PMMA matrix composite incorporated with alumina (Al2O3) and yttria-stabilized zirconia poly crystal (Y-TZP) powders, as dental base material, was studied. The limitation of PMMA matrix is due to its weak fracture toughness. The PMMA powder was mixed with liquid MMA monomer and stabilized with 0.0025% hydroquinone. Benzoyl peroxide (BPO) and ethylene glycol dimethacrylate (EGDMA) were used as initiator and as cross-linking agent, respectively. The study was divided into two different stages. The first stage, the amount of Al2O3/Y-TZP as filler material was fixed at 5 wt% in the PMMA matrix composite. However, the ratio between Al2O3 and Y-TZP was varied from 0 to 100. In this stage the optimum amount for both untreated and treated fillers with silane (γ-MPS) was evaluated through their tensile, flexural and fracture toughness tests and microstructure examination. It was found that the optimum ratio is 80/20 (Al2O3/Y-TZP). Composites filled with treated filler produced superior properties. In the second stage, the optimum filler ratio (80/20) was used to study the effect of solid loading in the PMMA matrix composite. The solid loading was varied from 0 to 20 wt%. Their properties were evaluated based on their mechanical properties, microstructure examination, Vickers micro hardness, thermal properties, effect of simulated body fluid (SBF) exposure and radiopacity test. The results show that 10% solid loading is the best.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/6419
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectCharacterization of denture base poly Methylmethacrylateen_US
dc.subjectreinforced with alumina / zirconia particlesen_US
dc.titleCharacterization Of Denture Base Poly (Methylmethacrylate) Reinforced With Alumina / Zirconia Particlesen_US
dc.typeThesisen_US
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