A Study On The Effect Of a-Cordierite Ceramic Powder As A Filler In Denture Base Poly (Methyl Methacrylate)
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Date
2011-05
Authors
Shawi, Hoaida. K. Salem
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The aim of this research is to investigate on the effect of α-cordierite ceramic powder reinforcement filler in poly methyl methacrylate (PMMA). In this study the formulation used include PMMA, α-cordierite ceramic powder, benzoyl peroxide (BPO) as the initiator, methyl methacrylate as the monomer and ethylene glycol dimethyl acrylate (EGDMA) as the cross-linking agent. The α-cordierite was treated with a silane coupling agent (γ-MPS) before it was mixed with the powder components (PMMA, BPO). The samples are prepared according to the standard dental laboratory application. The incorporation of α-cordierite filler into PMMA matrix resulted in an increase tensile modulus, flexural strength and modulus and fracture toughness with slightly reduction in tensile strength. The formulations which contained treated filler with γ-MPS had shown much higher mechanical properties than that of the untreated samples. Also, the results showed an improvement on surface hardness of PMMA composite. Absorption in water and simulated body fluid (SBF) revealed that the filled samples showed slightly higher absorption as compared to the unfilled samples. However, the filled samples showed lower solubility than the unfilled samples. Apart from that, the flexural strength was decreased as a function of the period of immersion in water and SBF. Finally, the radiopacity of PMMA composite was improved when the filler percentage increased.
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Keywords
Effect of α-cordierite ceramic powder , filler in poly methyl methacrylate