The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
권호 표지
DOI QR코드

DOI QR Code

The effect of repeated porcelain firings on corrosion resistance of different dental alloys

  • Received : 2012.12.14
  • Accepted : 2013.02.12
  • Published : 2013.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

PURPOSE. The aim of this study was to evaluate the effects of repeated porcelain firing process on the corrosion rates of the dental alloys. MATERIALS AND METHODS. Cr-Co, Cr-Ni and Pd-Ag alloys were used for this study. Each metal supported porcelain consisted of 30 specimens of 10 for 7, 9 and 11 firing each. Disc-shaped specimens 10 mm diameter and 3 mm thickness were formed by melting alloys with a propane-oxygen flame and casted with a centrifuge casting machine and then with the porcelain veneer fired onto the metal alloys. Corrosion tests were performed in quintuplicate for each alloy (after repeated porcelain firing) in Fusayama artificial saliva solution (pH = 5) in a low thermal-expansion borosilicate glass cell. Tamhane and Sheffe test was used to compare corrosion differences in the results after repeated firings and among 7, 9 and 11 firing for each alloy. The probability level for statistical significance was set at ${\alpha}$=0.05. RESULTS. The corrosion resistance was higher (30 mV), in case of 7 times firing (Commercial). On the other hand, it was lower in case of 11 times firing (5 mV) (P<.05). Conclusion. Repeated firings decreased corrosion resistance of Pd-Ag, Cr-Co and Cr-Ni alloys. The Pd-Ag alloy exhibited little corrosion in in vitro tests. The Cr-Ni alloy exhibited higher corrosion resistance than Cr-Co alloys in in vitro tests.

Keywords

References

  1. Kedici SP, Aksüt AA, Kílíçarslan MA, Bayramoğlu G, Gökdemir K. Corrosion behaviour of dental metals and alloys in different media. J Oral Rehabil 1998;25:800-8. https://doi.org/10.1046/j.1365-2842.1998.00305.x
  2. Elshahawy W, Watanabe I, Koike M. Elemental ion release from four different fixed prosthodontic materials. Dent Mater 2009;25:976-81. https://doi.org/10.1016/j.dental.2009.02.004
  3. Viennot S, Dalard F, Lissac M, Grosgogeat B. Corrosion resistance of cobalt-chromium and palladium-silver alloys used in fixed prosthetic restorations. Eur J Oral Sci 2005; 113:90-5. https://doi.org/10.1111/j.1600-0722.2005.00190.x
  4. McLean J. The science and art of dental ceramics. The nature of dental ceramics and their clinical use. 1st ed. Chicago; Quintessence Publishing; 1979.
  5. Schmalz G, Garhammer P. Biological interactions of dental cast alloys with oral tissues. Dent Mater 2002;18:396-406. https://doi.org/10.1016/S0109-5641(01)00063-X
  6. Wataha JC. Biocompatibility of dental casting alloys: a review. J Prosthet Dent 2000;83:223-34. https://doi.org/10.1016/S0022-3913(00)80016-5
  7. Johnson T, van Noort R, Stokes CW. Surface analysis of porcelain fused to metal systems. Dent Mater 2006;22:330-7. https://doi.org/10.1016/j.dental.2005.05.003
  8. Roach MD, Wolan JT, Parsell DE, Bumgardner JD. Use of x-ray photoelectron spectroscopy and cyclic polarization to evaluate the corrosion behavior of six nickel-chromium alloys before and after porcelain-fused-to-metal firing. J Prosthet Dent 2000;84:623-34. https://doi.org/10.1067/mpr.2000.111496
  9. Bumgardner JD, Lucas LC. Surface analysis of nickel-chro mium dental alloys. Dent Mater 1993;9:252-9. https://doi.org/10.1016/0109-5641(93)90070-7
  10. Lin HY, Bowers B, Wolan JT, Cai Z, Bumgardner JD. Metallurgical, surface, and corrosion analysis of Ni-Cr dental casting alloys before and after porcelain firing. Dent Mater 2008;24:378-85. https://doi.org/10.1016/j.dental.2007.06.010
  11. Reclaru L, Lüthy H, Eschler PY, Blatter A, Susz C. Corrosion behaviour of cobalt-chromium dental alloys doped with precious metals. Biomaterials 2005;26:4358-65. https://doi.org/10.1016/j.biomaterials.2004.11.018
  12. Matković T, Matković P, Malina J. Effects of Ni and Mo on the microstructure and some other properties of Co-Cr dental alloys. J Alloys Compd 2004;366:293-7. https://doi.org/10.1016/j.jallcom.2003.07.004
  13. Huang HH. Effect of chemical composition on the corrosion behavior of Ni-Cr-Mo dental casting alloys. J Biomed Mater Res 2002;60:458-65. https://doi.org/10.1002/jbm.10080
  14. Beck KA, Sarantopoulos DM, Kawashima I, Berzins DW. Elemental release from CoCr and NiCr alloys containing palladium. J Prosthodont 2012;21:88-93. https://doi.org/10.1111/j.1532-849X.2011.00800.x
  15. Manaranche C, Hornberger H. A proposal for the classification of dental alloys according to their resistance to corrosion. Dent Mater 2007;23:1428-37. https://doi.org/10.1016/j.dental.2006.11.030
  16. Benatti OF, Miranda WG Jr, Muench A. In vitro and in vivo corrosion evaluation of nickel-chromium- and copperaluminum- based alloys. J Prosthet Dent 2000;84:360-3. https://doi.org/10.1067/mpr.2000.109377
  17. Rao SB, Chowdhary R. Evaluation on the corrosion of the three Ni-Cr alloys with different composition. Int J Dent 2011;2011:397029.
  18. Geis-Gerstorfer J, Weber H. In vitro corrosion behavior of four Ni-Cr dental alloys in lactic acid and sodium chloride solutions. Dent Mater 1987;3:289-95. https://doi.org/10.1016/S0109-5641(87)80064-7
  19. Wylie CM, Shelton RM, Fleming GJ, Davenport AJ. Corrosion of nickel-based dental casting alloys. Dent Mater 2007;23:714-23. https://doi.org/10.1016/j.dental.2006.06.011
  20. Goodall TG, Lewis AJ. The metallography of heat treatment effects in a nickel-base casting alloy. A preliminary report. Aust Dent J 1979;24:235-7. https://doi.org/10.1111/j.1834-7819.1979.tb02931.x
  21. Lewis AJ. Metallographic changes and phase identification in a nickel base alloy upon fusion and casting. Aust Dent J 1975;20:378-83. https://doi.org/10.1111/j.1834-7819.1975.tb04386.x
  22. Leung VW, Darvell BW. Artificial salivas for in vitro studies of dental materials. J Dent 1997;25:475-84. https://doi.org/10.1016/S0300-5712(96)00068-1
  23. Reclaru L, Meyer JM. Zonal coulometric analysis of the corrosion resistance of dental alloys. J Dent 1995;23:301-11. https://doi.org/10.1016/0300-5712(95)91150-L
  24. Holland RI. Corrosion testing by potentiodynamic polarization in various electrolytes. Dent Mater 1992;8:241-5. https://doi.org/10.1016/0109-5641(92)90093-R

Cited by

  1. Data Fitting to Study Ablated Hard Dental Tissues by Nanosecond Laser Irradiation vol.11, pp.5, 2016, https://doi.org/10.1371/journal.pone.0156093
  2. Effect of Cooling Rate on Hardness and Phase Transformation of a Pd-Ag-Based Metal-Ceramic Alloy with or without Ice-Quenching vol.11, pp.5, 2013, https://doi.org/10.3390/met11050680
  3. Does Simulated Porcelain Firing Influence Corrosion Properties of Casted and Sintered CoCr Alloys? vol.14, pp.15, 2013, https://doi.org/10.3390/ma14154147