International Journal of Prosthodontics and Restorative Dentistry

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VOLUME 9 , ISSUE 4 ( October-December, 2019 ) > List of Articles

Original Article

Evaluation of Impact Strength and Surface Hardness of Acrylic Resin Modified with Different Nano Materials: An In Vitro Study

Kanesha Abrol, Samarth K Agarwal, Rachna Maheshwari, Romil Singhal, Swatantra Agarwal

Keywords : Acrylic resin, Impact strength, Nanoparticles, Silicon dioxide, Surface hardness, Zirconium oxide

Citation Information : Abrol K, Agarwal SK, Maheshwari R, Singhal R, Agarwal S. Evaluation of Impact Strength and Surface Hardness of Acrylic Resin Modified with Different Nano Materials: An In Vitro Study. Int J Prosthodont Restor Dent 2019; 9 (4):113-116.

DOI: 10.5005/jp-journals-10019-1254

License: CC BY-NC 4.0

Published Online: 01-12-2019

Copyright Statement:  Copyright © 2019; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim: The fracture of the denture resulting from the accidental fall on the ground is affected by the impact strength of the acrylic resin. Many attempts have been made to improve the mechanical properties of acrylic resin by reinforcing it with different materials. The aim of this study was to evaluate the effect of addition of different nano materials on the impact strength and surface hardness of the acrylic resin. Materials and methods: Fifty samples of dimensions 65 mm × 10 mm × 3 mm were made and divided into five groups. Group I is the control group of heat-activated polymethyl methacrylate (PMMA) acrylic resin, while groups II, III, IV, and V are having 1% and 3% zirconium oxide (ZrO2) and silicon dioxide (SiO2) nanoparticles in heat-activated PMMA by weight, respectively. A metallic block was fabricated and invested into addition silicone impression material to form a mold. The modeling wax was melted and flown into the mold cavity to form the wax block. The samples were subsequently polymerized, retrieved, finished, and polished. Impact strength and surface hardness were measured by Izod impact testing machine and Vickers hardness tester, respectively. Results: The results showed that the control group had the highest impact strength and lowest value was observed with 1% SiO2. The value of Vickers hardness was maximum with 1% ZrO2 and least with the control group. The analysis of variance (ANOVA) for both the impact strength and surface hardness indicated a p value of <0.001, which is very highly significant. Conclusion: Incorporation of ZrO2 and SiO2 nanoparticles into the heat-activated PMMA affects the impact strength and surface hardness.


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  1. Sabarigirinathan C, Vinayagavel K, Rupkumar P, et al. A comparative study to evaluate the mechanical properties of zirconium oxide added polymethyl methacrylate by two different methods at two different concentrations. Ann Int Med Dent Res 2015;1(3):161–165.
  2. Choksi RH, Mody PV. Flexural properties and impact strength of denture base. J Indian Prosthodont Soc 2016;16(3):264–270. DOI: 10.4103/0972-4052.176532.
  3. Gad MM, Rahoma A, Thobity AM, et al. Influence of incorporation of ZrO2 nanoparticles on the repair strength of polymethyl methacrylate denture bases. Int J Nanomedicine 2016;11:5633–5643. DOI: 10.2147/IJN.S120054.
  4. Ahmed MA, El-Shennawy M, Althomali YM, et al. Effect of titanium dioxide nano particles incorporation on mechanical and physical properties on two different types of acrylic resin denture base. World J Nano Sci Eng 2016;6:111–119. DOI: 10.4236/wjnse.2016.63011.
  5. Cevik P, Yildirim-Bicer AZ. The effect of silica and prepolymer nanoparticles on the mechanical properties of denture base acrylic resins. J Prosthodont 2018;27(8):763–770. DOI: 10.1111/jopr.12573.
  6. Safarabadi M, Khansari NM, Rezaei A. An experimental investigation of HA/AL2O3 nanoparticles on mechanical properties of restorative materials. Eng Solid Mech 2014;2(3):173–182. DOI: 10.5267/j.esm.2014.4.006.
  7. Dikbas I, Gurbuz O, Unalan F, et al. Impact strength of denture polymethyl methacrylate reinforced with different forms of E-glass fibres. Acta Odontol Scand 2013;71(3–4):727–732. DOI: 10.3109/00016357.2012.715198.
  8. Asopa V, Suresh S, Khandelwal M, et al. A comparative evaluation of properties of zirconia reinforced high impact acrylic resin with that of high impact acrylic resin. Saudi J Dent Res 2015;6(2):145–151. DOI: 10.1016/j.sjdr.2015.02.003.
  9. Ihab NS, Moudhaffar M. Evaluation of effect of modified nano-fillers addition on some properties of heat cured acrylic denture base material. J Bagh Coll Dent 2011;23(3):23–29.
  10. Alhavaz A, Dastjerdi MR, Ghasemi A, et al. Effect of untreated zirconium oxide nanofiller on the flexural strength and surface hardness of autopolymerized interim fixed restorations resins. J Esthet Restor Dent 2017;29(4):264–269. DOI: 10.1111/jerd.12300.
  11. McNally LM, Sullivan DJ, Jagger DC. An in vitro investigation of the effect of the addition of untreated and surface treated silica on the transverse and impact strength of polymethyl methacrylate acrylic resin. Biomed Mater Eng 2006;16(2):93–100.
  12. Zhang X, Zhang X, Huang Z, et al. Hybrid effects of zirconia nanoparticles with aluminium borate whiskers on mechanical properties of denture base resin PMMA. Dent Mater J 2014;33(1): 141–146. DOI: 10.4012/dmj.2013-054.
  13. Jagger DC, Harrison A, Jandt KD. The reinforcement of dentures. J Oral Rehabil 1999;26(3):185–194. DOI: 10.1046/j.1365-2842.1999.00375.x.
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