The effect of acrylamide incorporation on the thermal and physical properties of denture resins
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PURPOSE. Polymethyl methacrylate (PMMA) is the most commonly used denture base material despite typically low in strength. The purpose of this study was to improve the physical properties of the PMMA based denture base resins (QC-20, Dentsply Ltd., Addlestone, UK; Stellon, AD International Ltd, Dentsply, Switzerland; Acron MC; GC Lab Technologies Inc., Alsip, Japan) by copolymerization mechanism. MATERIALS AND METHODS. Control group specimens were prepared according to the manufacturer recommendations. In the copolymer groups; resins were prepared with 5%, 10%, 15% and 20% acrylamide (AAm) (Merck, Hohenbrunn, Germany) content according to the moleculer weight ratio, respectively. Chemical structure was characterized by a Bruker Vertex-70 Fourier transform infrared spectroscopy (FTIR) (Bruker Optics Inc., Ettlingen, Germany). Hardness was determined using an universal hardness tester (Struers Duramin, Struers A/S, Ballerup, Denmark) equipped with a Vickers diamond penetrator. The glass transition temperature (Tg) of control and copolymers were evaluated by Perkin Elmer Diamond DSC (Perkin Elmer, Massachusetts,USA). Statistical analyses were carried out using the statistical package SPSS for Windows, version 15.0 (SPSS, Chicago, IL, USA). The results were tested regarding the normality of distribution with the Shapiro Wilk test. Data were analyzed using ANOVA with post-hoc Tukey test (P<.01). RESULTS. The copolymer synthesis was confirmed by FTIR spectroscopy. Glass transition temperature of the copolymer groups were higher than the control groups of the resins. The 10%, 15% and 20% copolymer groups of Stellon presented significantly higher than the control group in terms of hardness. 15% and 20% copolymer groups of Acron MC showed significantly higher hardness values when compared to the control group of the resin. Acrylamide addition did not affect the hardness of the QC-20 resin significantly. CONCLUSION. Within the limitation of this study, it can be concluded that copolymerization of PMMA with AAm increased the hardness value and glass transition temperature of PMMA denture base resins.
Abstract
PURPOSE. Polymethyl methacrylate (PMMA) is the most commonly used denture base material despite typically low in strength. The purpose of this study was to improve the physical properties of the PMMA based denture base resins (QC-20, Dentsply Ltd., Addlestone, UK; Stellon, AD International Ltd, Dentsply, Switzerland; Acron MC; GC Lab Technologies Inc., Alsip, Japan) by copolymerization mechanism. MATERIALS AND METHODS. Control group specimens were prepared according to the manufacturer recommendations. In the copolymer groups; resins were prepared with 5%, 10%, 15% and 20% acrylamide (AAm) (Merck, Hohenbrunn, Germany) content according to the moleculer weight ratio, respectively. Chemical structure was characterized by a Bruker Vertex-70 Fourier transform infrared spectroscopy (FTIR) (Bruker Optics Inc., Ettlingen, Germany). Hardness was determined using an universal hardness tester (Struers Duramin, Struers A/S, Ballerup, Denmark) equipped with a Vickers diamond penetrator. The glass transition temperature (Tg) of control and copolymers were evaluated by Perkin Elmer Diamond DSC (Perkin Elmer, Massachusetts,USA). Statistical analyses were carried out using the statistical package SPSS for Windows, version 15.0 (SPSS, Chicago, IL, USA). The results were tested regarding the normality of distribution with the Shapiro Wilk test. Data were analyzed using ANOVA with post-hoc Tukey test (P<.01). RESULTS. The copolymer synthesis was confirmed by FTIR spectroscopy. Glass transition temperature of the copolymer groups were higher than the control groups of the resins. The 10%, 15% and 20% copolymer groups of Stellon presented significantly higher than the control group in terms of hardness. 15% and 20% copolymer groups of Acron MC showed significantly higher hardness values when compared to the control group of the resin. Acrylamide addition did not affect the hardness of the QC-20 resin significantly. CONCLUSION. Within the limitation of this study, it can be concluded that copolymerization of PMMA with AAm increased the hardness value and glass transition temperature of PMMA denture base resins.
참고문헌 (41)
- Petersen PE, "The global burden of oral diseases and risks to oral health", Bull World Health Organ, 83, pp.661~669 (2005)
- Tang AT, "Cytotoxicity tests of in situ polymerized resins: methodological comparisons and introduction of a tissue culture insert as a testing device", J Biomed Mater Res, 45, pp.214~222 (1999)
- Rached RN, "Heat-cured acrylic resin repaired with microwave-cured one: bond strength and surface texture", J Oral Rehabil, 28, pp.370~375 (2001)
- Wolfaardt JF, "The occurrence of porosity in a heat-cured poly (methyl methacrylate) denture base resin", J Prosthet Dent, 55, pp.393~400 (1986)
- Honorez P, "The effect of three processing cycles on some physical and chemical properties of a heat-cured acrylic resin", J Prosthet Dent, 61, pp.510~517 (1989)
- Nishii M, "Curing of denture base resins with microwave irradiation: with particular reference to heat-curing resins", J Osaka Dent Univ, 2, pp.23~40 (1968)
- Barbosa DB, "Effect of monomer treatment and polymerisation methods on the bond strength of resin teeth to denture base material", Gerodontology, 26, pp.225~231 (2009)
- Jacob J, "Comparative study of methyl methacrylate cure by microwave radiation versus thermal energy", Polym Test, 14, pp.343~354 (1995)
- Smith LT, "Mechanical properties of new denture resins polymerized by visible light, heat, and microwave energy", Int J Prosthodont, 5, pp.315~320 (1992)
- De Clerck JP, "Microwave polymerization of acrylic resins used in dental prostheses", J Prosthet Dent, 57, pp.650~658 (1987)
- Jerolimov V, "Rapid curing of acrylic denture-base materials", Dent Mater, 5, pp.18~22 (1989)
- Usanmaz A, "Thermal and Mechanical Properties of Microwave- and Heat-Cured Poly(methyl methacrylate) Used as Dental Base Material", J Appl Polym Sci, 90, pp.251~256 (2003)
- Bural C, "Effect of leaching residual methyl methacrylate concentrations on in vitro cytotoxicity of heat polymerized denture base acrylic resin processed with different polymerization cycles", J Appl Oral Sci, 19, pp.306~312 (2011)
- Takahashi T, "Influence of reinforcing materials on strain of maxillary complete denture", Acta Odontol Scand, 71, pp.307~311 (2013)
- Beyli MS, "An analysis of causes of fracture of acrylic resin dentures", J Prosthet Dent, 46, pp.23841~ (1981)
- Jagger DC, "The reinforcement of dentures", J Oral Rehabil, 26, pp.185~194 (1999)
- Cunha TR, "Influence of incorporation of fluoroalkyl methacrylates on roughness and flexural strength of a denture base acrylic resin", J Appl Oral Sci, 17, pp.103~107 (2009)
- Moszner N, "Bis(acrylamide)s as new cross-linkers for resin-based composite restoratives", Dent Mater, 22, pp.1157~1162 (2006)
- Umemoto K, "Basic study of a new denture base resin applying hydrophobic methacrylate monomer", Dent Mater J, 16, pp.21~30 (1997)
- Umemoto K, "Basic study of a new soft resin applied with bisfunctional siloxane oligomer", Dent Mater J, 26, pp.656~658 (2007)
- Mortimer DA, "Synthetic polyelectrolytes- A review", Polym Int, 25, pp.29~41 (1991)
- Friedman M, "Chemistry, biochemistry, and safety of acrylamide. A review", J Agric Food Chem, 51, pp.4504~4526 (2003)
- Pinto Lde R, "Effect of repeated cycles of chemical disinfection on the roughness and hardness of hard reline acrylic resins", Gerodont, 27, pp.147~153 (2010)
- Philips RW, "Science of Dental Materials", pp.15~35 (1991), Saunders Co
- Ping Chaing BK, "Polymers in the service of prosthetic dentistry", J Dent, 12, pp.203~214 (1984)
- The Japan Society of Calorimetry and Thermal Analysis, "Comprehensive Handbook of Calorimetry and Thermal Analysis" (2004), J. Wiley
- Aouachria K, "Miscibility of PVC", PMMA blends by vicat softening temperature, viscometry, DSC and FTIR analysis, 2006, pp.25, 1101~1108
- Vuorinen AM, "Effect of rigid rod polymer filler on mechanical properties of polymethyl methacrylate denture base material", Dent Mater, 24, pp.708~713 (2008)
- Puri G, "Effect of phosphate group addition on the properties of denture base resins", J Prosthet Dent, 100, pp.302~308 (2008)
- Pavlinec J, "Monomers for Adhesive Polymers, 8a Crosslinking Polymerization of Selected N-Substituted bis(Acrylamide)s for Dental Filling Materials", J Appl Polym Sci, 113, pp.3137~3145 (2009)
- Pai RK, "Temperatureinduced formation of strong gels of acrylamide-based polyelectrolytes", J Colloid Interface Sci, 337, pp.46~53 (2009)
- Hacker MC, "Synthesis and characterization of injectable,thermally and chemically gelable, amphiphilic poly(N-isopropylacrylamide)- based macromers", Biomacromolecules, 9, pp.1558~1570 (2008)
- Bhattacharya A, "Polymer grafting and crosslinking" (2009), Wiley
- Azevedo A, "Hardness of denture base and hard chair-side reline acrylic resins", J Appl Oral Sci, 13, pp.291~295 (2005)
- Rueggeberg FA, "Correlation of parameters used to estimate monomer conversion in a light-cured composite", J Dent Res, 67, pp.932~937 (1988)
- Rodford RA, "Further development and evaluation of high impact strength denture base materials", J Dent, 18, pp.151~157 (1990)
- Ruyter IE, "Flexural properties of denture base polymers", J Prosthet Dent, 43, pp.95~104 (1980)
- Blagojevic V, "Microwave polymerization of denture base materials. A comparative study", J Oral Rehabil, 26, pp.804~808 (1999)
- Sperling LH, "Introduction to physical polymer science" (1986), Wiley
- Neppelenbroek KH, "Hardness of heat-polymerized acrylic resins after disinfection and long-term water immersion", J Prosthet Dent, 93, pp.171~176 (2005)
- Rao S, "Cure studies on bifunctional epoxy matrices using a domestic microwave oven", Polym Test, 27, pp.64552~ (2008)
