Research Article


DOI :10.26650/eor.20190072   IUP :10.26650/eor.20190072    Full Text (PDF)

Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin

N. Gopi ChanderVenkatraman JayaramanVenkat Sriram

Purpose 
The aim of this study was to compare the differences between the ASTM D790 and ISO 20795.1.2013 standards in evaluating the flexural strength of heat cure poly methyl methacrylate (PMMA) denture base resin. 

Materials and Methods
30 heat cure denture base samples were fabricated in accordance to ISO 20795.1.2013 and ASTM D790 Standards. The specimens were finished and stored following the standardized protocol. The flexural strength was determined using universal testing machine at cross head speed of 1.50 mm/min and a span length of 40.00 mm. The mean flexural strength values were calculated in megapascals (MPa), and statistically analyzed. 

Results
The mean flexural strength of heat cure PMMA found with ISO and ASTM ranged between 60.492 MPa and 61.470 MPa. There was no significant difference between the two methods. 

Conclusion The quantitative differences existed in the flexural strength of denture base resin between ISO 20795.1.2013 and ASTM 790 protocols but those
differences had no statistical and clinical significance. 

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References

  • 1. Chander NG. Polymethyl metha acrylate denture base. An overview. J Indian Prosthodont Soc 2018;18:87-88. [CrossRef] google scholar
  • 2. Gad MM, Fouda SM, Al-Harbi FA, Näpänkangas R, Raustia A. PMMA denture base material enhancement: a review of fiber, filler, and nanofiller addition. Int J Nanomedicine 2017;12:38011. [CrossRef] google scholar
  • 3. Chitchumnong P, Brooks SC, Stafford GD. Comparison of three- and four-point flexural strength testing of denture-base polymers. Dent Mater 1989;5:2-5. [CrossRef] google scholar
  • 4. Sweeney WW, Caul HJ, Genug WA. Transverse Testing Machine for Denture Resins, J Am Dent Assoc 1954;49:174-176. [CrossRef] google scholar
  • 5. Osborne J .Transverse Tests on Denture Base Materials, Br Dent J 1949;86:64-67. google scholar
  • 6. Souder W, and Paffenbarger GC. Physical Properties of Dental Materials, Circular C433, National Bureau of Standards, Washington, DC. US Government Printing Office, 1942:173. google scholar
  • 7. Stafford GD, Bates JF, Huggett R and Handley RW. A Review of the Properties of Some Denture Base Polymers. Br Dent J 1980;8:292-306. [CrossRef] google scholar
  • 8. International Organization for Standardization. ISO 20795-1: 2013. Dentistry - Base polymers- Part 1: Denture base polymers. Geneva: ISO 2013:1-42. google scholar
  • 9. American Society for Testing and Materials. ASTM Standard D 790-02. Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials. ASTM International, West Conshohocken, United States. ASTM 2002:146-154. google scholar
  • 10. Jagger DC, Harrison A, Jandt KD. The reinforcement of dentures. J Oral Rehabil 1999;26:185-194. [CrossRef] google scholar
  • 11. Vallittu PK. A review of fiber-reinforced denture base resins. J Prosthodont 1996;5:270-276. [CrossRef] google scholar
  • 12. Somkuwar S, Mishra SK, Agrawal B, Choure R. Comparison of the flexural strength of polymethyl methacrylate resin reinforced with multiwalled carbon nanotubes and processed by conventional water bath technique and microwave polymerization. J Indian Prosthodont Soc 2017;17:332-339. [CrossRef] google scholar
  • 13. Ucar Y, Akova T, Aysan I. Mechanical properties of polyamide versus different PMMA denture base materials. J Prosthodont 2012;21:173-176. [CrossRef] google scholar
  • 14. Harini P, Mohamed K, Padmanabhan TV. Effect of Titanium dioxide nanoparticles on the flexural strength of polymethylmethacrylate: an in vitro study. Indian J Dent Res 2014;25:459-463. [CrossRef] google scholar
  • 15. Venkat R, Gopichander N, Vasantakumar M. Comprehensive analysis of repair/reinforcement materials for polymethyl methacrylate denture bases: mechanical and dimensional stability characteristics. J Indian Prosthodont Soc 2013;13:439449. [CrossRef] google scholar
  • 16. Phoenix RD, Mansueto MA, Ackerman NA, Jones RE. Evaluation of mechanical and thermal properties of commonly used denture base resins. J Prosthodont 2004;13:17-27. [CrossRef] google scholar

Citations

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APA

Chander, N.G., Jayaraman, V., & Sriram, V. (2019). Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin. European Oral Research, 53(3), 137-140. https://doi.org/10.26650/eor.20190072


AMA

Chander N G, Jayaraman V, Sriram V. Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin. European Oral Research. 2019;53(3):137-140. https://doi.org/10.26650/eor.20190072


ABNT

Chander, N.G.; Jayaraman, V.; Sriram, V. Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin. European Oral Research, [Publisher Location], v. 53, n. 3, p. 137-140, 2019.


Chicago: Author-Date Style

Chander, N. Gopi, and Venkatraman Jayaraman and Venkat Sriram. 2019. “Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin.” European Oral Research 53, no. 3: 137-140. https://doi.org/10.26650/eor.20190072


Chicago: Humanities Style

Chander, N. Gopi, and Venkatraman Jayaraman and Venkat Sriram. Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin.” European Oral Research 53, no. 3 (Feb. 2023): 137-140. https://doi.org/10.26650/eor.20190072


Harvard: Australian Style

Chander, NG & Jayaraman, V & Sriram, V 2019, 'Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin', European Oral Research, vol. 53, no. 3, pp. 137-140, viewed 1 Feb. 2023, https://doi.org/10.26650/eor.20190072


Harvard: Author-Date Style

Chander, N.G. and Jayaraman, V. and Sriram, V. (2019) ‘Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin’, European Oral Research, 53(3), pp. 137-140. https://doi.org/10.26650/eor.20190072 (1 Feb. 2023).


MLA

Chander, N. Gopi, and Venkatraman Jayaraman and Venkat Sriram. Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin.” European Oral Research, vol. 53, no. 3, 2019, pp. 137-140. [Database Container], https://doi.org/10.26650/eor.20190072


Vancouver

Chander NG, Jayaraman V, Sriram V. Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin. European Oral Research [Internet]. 1 Feb. 2023 [cited 1 Feb. 2023];53(3):137-140. Available from: https://doi.org/10.26650/eor.20190072 doi: 10.26650/eor.20190072


ISNAD

Chander, N.Gopi - Jayaraman, Venkatraman - Sriram, Venkat. Comparison of ISO and ASTM standards in determining the flexural strength of denture base resin”. European Oral Research 53/3 (Feb. 2023): 137-140. https://doi.org/10.26650/eor.20190072



TIMELINE


Submitted28.11.2018
Accepted21.03.2019
Published Online10.09.2019

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