Mohamed MORSY, Mohammed AL-DAOUS

Gold nanoparticles-PMMA composite for denture base: Synthesis, mechanical and thermal characteristics

Acrylic resin and rubber-reinforced acrylic polymers represent approximately 95% of the denture base materials used in prosthodontics today. The synthesis of highly dispersed gold nano-particle (AuNP) in polymethyl methacrylate (MMA) as monomer phase transferring agent followed by the formation of polymer composite is described. The resulting nanocomposites undergo various pertaining physicochemical analysis, especially the thermal diffusivity measurements and dynamic mechanical analysis (DMA), to evaluate their basic functional properties. Cylindrical test specimens containing an embedded Pt-wire were used to determine heat conductivity and thermal diffusivity of the investigated samples over a physiologic temperature range (0 to70 oC) based on the in-stationary heat-wire method. The DMA has been conducted on the basis of the Young’s Modulus’ approximation to investigate the viscoelasticity of rectangular samples of these materials using the three point bending test as well as the compression plats. The results indicated that the modified PMMA resin with gold nanoparticles fillers have potential as added components in denture bases to provide increased thermal diffusivity and well enhanced viscoelastic responses, which could lead to more patient satisfaction

Anahtar Kelimeler:

xx

Gold nanoparticles-PMMA composite for denture base: Synthesis, mechanical and thermal characteristics

Keywords:

Gold-Nanoparticles, PMMA Thermal,

PDF

___

Brady, A. P.; Lee, H.; Orlowski, J. A. "Thermal conductivity studies of composite dental restorative materials." J. Biomed. Mater. Res. 1974; 8: 471-85.
Craig, R. G. "Restorative dental materials." St Louis: Mosby C. V.; 1993.
Diwan, R. "Materials Prescribed in the Management of Edentulous Patients". In: ZarbG., Bolander C. L. (ed): "Prosthodontic Treatment for Edentulous Patients." 12th edn St. Louis, Mosby C. V., 2004: 190-207.
Ellakwa, A. E.; Morsy , M. A.; El-Sheikh, A. M. "Effect of aluminum oxide addition on the flexural strength and thermal diffusivity of heat-polymerized acrylic resin." J. Prosthodont. 2008; 17(6): 439-44.
Green, B. G.; Frankmann, S. P. "The effect of cooling on the perception of carbohydrate and intensive sweeteners." Physiol. Behav. 1988; 43: 515-9.
Hisada, K.; Takeshita, T. "Poly(methyl methacrylate) (PMMA)-based denture base materials with good biocompatibility" Jpn. Kokai Tokkyo Koho 2007, JP 2007332044 A 20071227.
Ishida, H.; Nakagaki, N. "Resin composites as dental materials" Jpn. Kokai Tokkyo Koho 2006, JP 2006069924 A 20060316.
Jinno, S.; Suzuki, T.; Ishikawa, A.; Hayashi, T.; Deguchi, M.; Ito, M.; Nakano, K.;Kawai, T.; Noguchi, T. "Influence of newly developed resin and MMA resin on Mouse fibroblasts cellular viability" Key Engineering 2,Bioceramics), 817-820. 2006, 309-311(Pt.
Kurata, S.; Nihei, T.; Umemoto, K. "Study on the development of antibacterial dental resin using silver methacrylate as an antibacterial substance. Part 1. Solubility of silver methacrylate in MMA and the mechanical strength of the resin with silver methacrylate" Shika Zairyo, Kikai 2005, 24(6), 466- 470.
Nakamura, M.; Kurihara, K. "Temperature dependence of amiloride-sensitive and insensitive components of rat taste nerve response to NaCl." Brain Res. 1988; 15:159-64.
Nakamura, M.; Kurihara, K. Differential temperature dependence of taste nevre responses to various taste stimuli in dogs and rats." Am. J. Physiol. 1991; 261 (6 Pt2): R1402-8.
Narva, K. K.; Lassila, L. V. J.; Vallittu, P. K. "Flexural fatigue of denture base polymer with fiber- reinforced composite reinforcement Composites" Part A: Applied Science and Manufacturing 2005, 36A(9), 1275-1281.
Narva, K. K.; Lassila, L. V. J.; Vallittu, P. K. "Flexural fatigue of denture base polymer with fiber- reinforced composite reinforcement Composites" Part A: Applied Science and Manufacturing 2005, 36A(9), 1275-1281.
Narva KK, Lassila LV, Vallittu PK. The static strength and modulus of fiber reinforced denture base polymer. Dent Mater 2005;21(5):421-8
Ogawa, T.; Hasegawa, A. "Effect of curing environment on mechanical properties and polymerizing behaviour of methyl methacrylate autopolymerizing resin" Journal of Oral Rehabilitation 2005, 32(3), 221- 226.
Phoenix, R. D. "Denture Base Materials." Dent. Clin. North Am. 1996; 40: 113-120.
Ren, Y.; Chen, H.; Li, B.; Li, G. "Antimicrobial activity of polymethyl methacrylate denture base with Ag- nano-TiO2 in vitro" Zhejiang Yixue 2007, 29(10), 1045-1047.
Shklar, G.; Chernin, D. (ed). Chapter 22, "Dental Science and Practice in the Twentieth Century, Part 2. A Sourcebook of Dental Medicine." Wabam, Maro Publications, 2002.
Zappini G, Kammann A, Wachter W. Comparison of fracture tests of denture base materials. J Prosthetic Dent 2003;90(6):578-85
Zellner, D. A.; Stewart, W. F. "Rozin P, Brown JM. Effect of temperature and expectations on liking for beverages." Physiol. Behav. 1988; 44: 61-8.