Skip to main content

Advertisement

SpringerLink
Log in

Evaluating The Fracture Toughness and Flexural Strength of Pressable Dental Ceramics: An In Vitro Study

  • Original Article
  • Published:
The Journal of Indian Prosthodontic Society

Abstract

The study was undertaken to evaluate the biaxial flexural strength, biaxial flexural strength after etching with 9 % HF acid and fracture toughness of three commonly used pressable all ceramic core materials. Ninety glass ceramic specimens were fabricated from three commercially available leucite based core ceramic material (1) Esthetic Empress, (2) Cergo, and (3) Performance Plus. Thirty discs of each material were divided into three groups of 10 discs each. Biaxial flexural strength (30 discs,) Biaxial flexural strength for samples treated with 9 % HF acid (30 discs) and fracture toughness (30 discs) were evaluated. Core material Performance Plus had the lowest biaxial strength of 124.89 MPa, Cergo had strength of 152.22 MPa and the highest value of 163.95 was reported for Esthetic Empress. For samples treated 9 % HF, Performance Plus had the lowest biaxial strength of 98.37 MPa, Cergo had strength of 117.42 MPa and the highest value of 143.74 was reported for Esthetic Empress. Core material Performance Plus had the lowest fracture toughness of 1.063 MPa, Cergo had strength of 1.112 MPa and the highest value of 1.225 was reported for Esthetic Empress. The results shows that Esthetic Empress had better mechanical properties compared to Cergo had Performance Plus in relation to the parameters tested.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

  1. Sadighpour L, Geramipanah F, Raeesi B (2006) In vitro mechanical tests for modern dental ceramics. J Dent 3:143–152

    Google Scholar 

  2. Hoosmand T, Parvizi S, Keshavad A (2008) Effect of surface acid etching on the biaxial flexural strength of two hot pressed glass ceramics. J Prosthodont 17:415–419

    Article  Google Scholar 

  3. Albakry M, Guazzato M, Swain MV (2003) Fracture toughness and hardness evaluation of three pressable all ceramic dental materials. J Dent 31:181–188

    Article  PubMed  Google Scholar 

  4. Denry IL, Holloway JA (2004) Elastic constants, Vickers hardness, and fracture toughness of fluorrichterite based glass ceramics. Dent Mater 20:213–219

    Article  PubMed  Google Scholar 

  5. Guazzato M, Albakry M, Ringer SP, Swain MV (2004) Strength, fracture toughness and microstructure of a selection of all ceramic materials. Part 1. Pressable and alumina glass infiltrated ceramics. Dent Mater 20:441–448

    Article  PubMed  Google Scholar 

  6. Yilmaz H, Aydin C, Gul BE (2007) Flexural strength and fracture toughness of dental core ceramics. J Prosthet Dent 98:120–128

    Article  PubMed  Google Scholar 

  7. Wang H, Isgro G, Pallav P, Feilzer AJ (2007) Fracture toughness determination of two dental porcelains with the indentation strength in bending method. Dent Mater 23:755–759

    Article  PubMed  Google Scholar 

  8. Albakry M, Guazzato M, Swain MV (2003) Biaxial flexural strength, elastic moduli, and X-ray diffraction characterization of three pressable all ceramic materials. J Prosthet Dent 89:374–380

    Article  PubMed  Google Scholar 

  9. Ban S, Anusavice KJ (1990) Influence of test method on failure stress of brittle dental material. J Dent Res 69:1791–1799

    Article  PubMed  Google Scholar 

  10. Wagner WC, Chu TM (1996) Biaxial flexural strength and indentation fracture toughness of three new dental core materials. J Prosthet Dent 76:140–144

    Article  PubMed  Google Scholar 

  11. Cattell MJ, Clarke RL, Lynch EJR (1997) The transverse strength, reliability and micro structural features of four dental ceramics—part 1. J Dent 25:399–407

    Article  PubMed  Google Scholar 

  12. Gorman CM, McDevitt WE, Hill RG (2000) Comparison of two heat pressed all ceramic dental materials. Dent Mater 16:389–395

    Article  PubMed  Google Scholar 

  13. Della Bona A, Anusavice KJ, Shen C (2000) Microtensile strength of composite bonded to hot-pressed ceramics. J Adhes Dent 2:305–313

    PubMed  Google Scholar 

  14. Della Bona A, Anusavice KJ, DeHoff PH (2003) Weibull analysis and flexural strength of hot pressed core and veneered ceramic structures. Dent Mater 19:662–669

    Article  Google Scholar 

  15. Della Bona A, Anusavice KJ, Mecholsky JJ Jr (2003) Failure analysis of resin composite bonded to ceramic. Dent Mater 19:693–699

    Article  PubMed  Google Scholar 

  16. Seghi RR, Denry IL (1995) Relative fracture toughness and hardness of new dental ceramics. J Prosthet Dent 74:145–150

    Article  PubMed  Google Scholar 

  17. Mackert JR Jr, Russell CM (1996) Leucite crystallization during processing of a heat-pressed dental ceramic. Int J Prosthodont 9:261–265

    PubMed  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Prosthodontics, Sri Sai College of Dental Surgery, Kothrepally, Vikarabad, Hyderabad, 501101, India

    Ravi Gurram, C. H. Vamsi Krishna, K. Mahendranadh Reddy, G. V. K. Mohan Reddy & Y. Mahadev Shastry

Authors
  1. Ravi Gurram
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. C. H. Vamsi Krishna
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. K. Mahendranadh Reddy
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. G. V. K. Mohan Reddy
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Y. Mahadev Shastry
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to C. H. Vamsi Krishna.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Gurram, R., Krishna, C.H.V., Reddy, K.M. et al. Evaluating The Fracture Toughness and Flexural Strength of Pressable Dental Ceramics: An In Vitro Study. J Indian Prosthodont Soc 14, 358–362 (2014). https://doi.org/10.1007/s13191-013-0331-1

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s13191-013-0331-1

Keywords

Search

Navigation