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:: Volume 31, Issue 3 (7-2019) ::
J Islam Dent Assoc Iran 2019, 31(3): 177-181 Back to browse issues page
Comparison of Water Sorption of Two Injection Acrylic Resins with a Conventional Pressure-Packed Acrylic Resin
Ehsan Ghasemi1, Ramin Mosharraf2, Siavash Mirzaei *3
1- Assistant Professor, Dental Material Research Center, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
2- Professor, Dental Materials Research Center, Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
3- Dentist, Private Office, Isfahan, Iran , dr.siavash.mirzaei@gmail.com
Abstract:   (638 Views)
Background and Aim: Water sorption is one of the most important properties that affects the quality of a prosthesis, and subsequently, the quality of treatment, and pa-tient’s quality of life. The aim of this study was to determine and compare the water sorption of two types of poly methyl methacrylate (PMMA) using the injection-molding systems with a traditional acrylic resin base material.
Materials and Methods: In this in vitro, experimental study, three groups of PMMA (n=10), consisting of two groups of injection molded PMMA samples (Vertex Castavar-ia and Ivo-Base High-Impact) were used for two different injection molding techniques and one group of conventional pressure-packed PMMA (Meliodent Heat Cure) was used for the conventional pressure-packed technique. After processing, 30 specimens were stored in distilled water at 37°C for 30 days. The water sorption test was then performed. Statistical analysis was carried out using SPSS version 23.0 via the Krus-kal-Wallis and Mann-Whitney tests (α=0.05).
Results: The mean value of water sorption was 17.88±1.08 µg/mm3 for IvoBase spec-imens, 28.45±2.19µg/mm3 for Vertex specimens, and 21.76 ±3.26 µg/mm3 for Melio-dent specimens (P<0.001 for Ivobase-Vertex, P <0.007 for Ivobase-Meliodent, and P<0.001 for Vertex-Meliodent).
Conclusion: Water sorption of IvoBase was significantly lower than that of other ma-terials. Despite such a significant difference, all of them completely fulfilled the re-quirements of EN ISO 20795-1:2008.
Keywords: Adsorption, Injections, Polymethyl Methacrylate
Full-Text [PDF 526 kb]   (156 Downloads)    
Type of Study: Orginal | Subject: Porosthodontics
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Ghasemi E, Mosharraf R, Mirzaei S. Comparison of Water Sorption of Two Injection Acrylic Resins with a Conventional Pressure-Packed Acrylic Resin. J Islam Dent Assoc Iran. 2019; 31 (3) :177-181
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Volume 31, Issue 3 (7-2019) Back to browse issues page
Journal of Islamic Dental Association of Iran

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