Abstract

The aim of the study was to evaluate and compare the physical properties of Heat & Chemically activated Denture Base Resin with addition of fillers. A total of 120 specimens were prepared. For evaluation of transverse strength and surface hardness of both Denture Base Resins, 80 specimens were prepared using standard mold measuring 65 mm x 10 mm x 2.5 mm, consisting of control plus experimental groups reinforced with three different fillers (5 wt% ZrO2 nanoparticles, 5 wt% Al2O3 nanoparticles, 2.5 wt% glass fibers). For evaluation of water sorption, 40 specimens were prepared using standard mold measuring 50 mm x 0.5 mm, consisting of control plus experimental groups reinforced with three different fillers. Results: Both Denture Base Resins showed increase in transverse strength and surface hardness after addition of fillers. Highest transverse strength and surface hardness was found to be in Heat Cure and Cold Cure reinforced with ZrO2 Nano Particles> Glass fiber >Al2O3 Nano Particles whereas the results of water sorption were in accordance with ISO specification. Conclusion: Reinforcement of both Denture Base Resins by addition of fillers can inhibit undesirable physical changes resulting from oral fluids and can prevent denture fractures by enhancing its properties.

• 1.   Sonkesariya S, Jain D, Shakya P, Agarwal R. Prevalence of dentulism, partial edentulism and complete edentulism in rural and urban population of Malwa region of India: A population-based study. Int J Prosthodont. 2014; 4(4):112-9.
• 2.   Marcus PA, Joshi A, Jones JA, Morgan SM. Complete denture and denture use for elders in new England. J Prosthet Dent. 1990; 63: 345-9.
• 3.   Rodford RA. Further development and evaluation of high impact strength denture base materials. J Prosthet Dent. 1990; 18:151-7.
• 4.   Lambrecht JR, Kydd WL. A functional stress analysis of the maxillary complete denture base. J Prosthet Dent. 1962; 12: 865-72.
• 5.   Stipho HD. Effect of Glass Fibre Reinforcement on Some Mechanical Properties of Autopolymerizing Polymethyl Methacrylate. J Prosthet Dent.1998; 79(5):580-4.
• 6.   Vallittu P. Flexural properties of acrylic resin polymer reinforced with unidirectional and woven glass fibres. J Prosthet Dent. 1999; 81(3): 318-26.
• 7.   Fujii K, Kanie T, Arikawa H, Inoue K. Flexural properties and impact strength of denture base polymer reinforced with woven glass fibers. Dent Material. 2000; 16(2):150-8.
• 8.   Lappalainen R, Yli-Urpo A, Huuskonen O. Frequency of damage to and need for repairs of removable dentures. Dental Society.1985; 81:151-5.
• 9.   Mowade TK, Dange SP. Effect of fiber reinforcement on impact strength of heat polymerized polymethyl methaacrylate denture base resin. J Adv Prosthodont. 2012; 4(1):30-6.
• 10.   Anusavice KJ. Phillips’s Science of Dental Materials. 11th ed. Saunders Philadelphia: 2003.
• 11.   Sehajpal SB, Sood VK. Effect of metal fillers on some physical properties of acrylic resin. J Prosthet Dent. 1989;61(6):746-51.
• 12.   Safaradadi M, Khansari N. An experimental investigation of HA/Al203 nanoparticle on mechanical properties of restoration material. Engineering solid mechanics. 2014; 2:173-82.
• 13.   Kanie T, Fujii K, Arikawa H, Inoue K. Flexural properties and impact strength of denture base polymer reinforced with woven glass fibers. Dent Mater. 2003;16: 150-8.
• 14.   Lambrecht JR and Kydd WL. A functional stress analysis of the maxillary complete denture base. J Prosthet Dent. 1962; 12: 865-72.
• 15.   Cucci A, Vergani E, Giampaolo E, Afonso F. Water sorption, solubility and bond strength of two autopolymerizing acrylic resins and one heatpolymerizing acrylic resin. The Jour of Prosthetic Dent.1998; 80(4): 434- 38.
• 16.   Eick JD. Biological properties of denture base resins. Dent Clin North Am. 1977;21: 459-64.
• 17.   Peyton FA. History of resins in dentistry. Dent Clin North Am. 1975;19: 211-22.
• 18.   Waters NE. The fatigue fracture of acrylic. Dent Pract. 1968;18: 389-92.
• 19.   Beyli MS, Mohahofer JA. An analysis of causes of fracture of acrylic resin dentures. J Prosthet Dent. 1981; 46(3): 238-41.
• 20.   Ahmad A, Alhareb A. Effect of Al2O3/ZrO2 reinforcement on the mechanical properties of PMMA denture base. Journal of Reinforced Plastics and Comp. 2011; 30:1–8.
• 21.   McCabe F and Walls A. Applied dental materials. 9th edition, 2009.
• 22.   Ferracane JL. Hygroscopic and hydrolytic effects in dental polymer networks. Dent Mater. 2006; 22: 211-22.
• 23.   Cucci A, Vergani E, Giampaolo E, Afonso F. Water sorption, solubility and bond strength of two autopolymerizing acrylic resins and one heatpolymerizing acrylic resin. The Jour of Prosthetic Dent.1998; 80(4): 434- 38.
• 24.   Jagger DC, Harrision A. The reinforcement of dentures. Journ of Oral Rehab. 1999; 26:185-94.
• 25.   Cui R, Li XM, Feng R. The use of nanoscale fibers or tubes to improve biocompatibility and bioactivity of biomedical materials. J. Nanomater. 2013; Article ID 728130: pg 16.
• 26.   Hua Y, Gu L, Watanabe H. Micromechanical analysis of nanoparticle-reinforced dental composites. Int. J. Eng. Sci. 2013; 69: 69–76.
• 27.   Ayman E, Mohamed A, Ali M, Sheikh E. Effect of Aluminum Oxide Addition on the Flexural Strength and Thermal Diffusivity of HeatPolymerized Acrylic Resin. J Prosthodont. 2008; 17(6): 439–44.
• 28.   Volkan N, Hamdi A, Korkmaz A, Turkyilmaz I. Influence of various metal oxides on mechanical and physical properties of heat-cured polymethylmethacrylate denture base resins. J Adv Prosthodont. 2013; 5: 241-47.
• 29.   Mohammed M, Ahmad M, Rahoma A, Reem A, Fahad A, Akhtar S. Reinforcement of PMMA Denture Base Material with a Mixture of ZrO2 Nanoparticles and Glass Fibers. International Journal of Dent. 2019;1: 1–11.
• 30.   Thakur K, Nagpal A, Gupta R, Verma R, Saini R, Mahajan V. Evaluation of the Transverse Strength of the Heat Cure PMMA Resin Reinforced with Various Concentrations of Two Different Nanoparticles: An In vitro Study. Journal of Advances in Medicine and Medical Res. 2019; 29(8): 1-8.
• 31.   Yu S, Lee Y, Oh S, Cho H, Oda Y, Bae M. Reinforcing Effects of Different Fibers on Denture Base Resin Based on the Fiber Type, Concentration, and Combination. Dent. Mater. J. 2012; 31: 1039–46.
• 32.   Alhotan A, Zidan S, Silikas N, Haider J, Jahantigh J, Yates J. Evaluation of Equivalent Flexural Strength for Complete Removable Dentures Made of Zirconia-Impregnated PMMA Nanocomposites. Dent. Mater. J. 2020; 13: 25-8.
• 33.   Vojdani M, Bagheri R, Khaledi, Amir R. Effects of aluminum oxide addition on the flexural strength, surface hardness, and roughness of heatpolymerized acrylic resin. Journal of Dental Sci. 2012; 7(3): 238–44.
• 34.   Mulla M, Murphy W, Huggett R, Brooks S. Effect of water and artificial saliva on mechanical properties of some denture-base materials. Dent. Mater. J. 1989; 5: 399–402.
• 35.   John J, Gangadhar A, Shah I. Flexural strength of heat-polymerized polymethyl methacrylate denture resin reinforced with glass, aramid, or nylon fibers. The J Prosthet Dent. 2001; 86(4): 424- 27.
• 36.   Panyayong W, Oshida Y, Andres CJ, Barco TM. Reinforcement of acrylic resins for provisional fixed restorations. Part III: effects of addition of titania and zirconia mixtures on some mechanical and physical properties. Biomed Mater Eng. 2002;12: 353-66

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