Unformatted text preview: nce of the catalysts show the following trend: RHA-5Cr5Ag >RHA5Ag >RHA-5Cr. RHA-5Cr5Ag was successfully regenerated after each runs. Silver was found to leach out from RHA-5Cr5Ag during the reaction. 159 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia MAT-P12 THERMAL AND ENVIRONMENTAL CHARACTERIZATION OF OPAQUE DENTAL PORCELAIN POWDER AS FILLER IN DENTURE BASE POLY (METHYL METHACRYLATE) Asam M. A. Abudalazez, Azlan Ariffin and Zainal Arifin Ahmad School of Materials & Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, Nibong Tebal 14300 Pulau Pinang, Malaysia E-mail: [email protected] About 90 - 95 % of dentures are fabricated from PMMA material which is a preferred material for removable complete and partial prostheses. In this study, opaque dental porcelain powder as ceramic filler incorporated into PMMA matrix. The resulted composite was tested for its environmental and thermal qualities for the applicability in dental restoration. The diagnoses results of filled and unfilled samples showed that the filler-filled formulations had less water solubility, less absorption and reduced weight loss after 28 days of immersion in SBF at 37 °C. The water absorption and solubility values of all filled formulations were below the values specified by the ISO standards for denture base materials . The degradation temperature of the filler -filled PMMA samples had shown slightly higher than that of the unfilled samples. The environmental and thermal qualities approved initially the feasibility of the prepared composite denture base material in dentu re restoration applications. MAT-P13 SIMPLE TECHNIQUE TO MEASURE THE DENSITY OF SHAPELESS MATERIALS BY VACUUM SYSTEM
1 Sugeng Triwahyono, Nur Hazirah Rozali Annuar, Nurrulhidayah Ahmad Fadzlillah , Aishah Abdul 1 1 1 Jalil, Ainul Hakimah Karim, Nurun Najwa Ruslan and Sharifah Najiha Timmiati 1 1 2 1 Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia 2 Dept. of Chemical Eng., Faculty of Chemic...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.
- Spring '11