European Journal of Prosthodontics and Restorative Dentistry

cover art

Cover Date:
June 2010
Electronic ISSN:
0965-7452
Vol:
18
Issue:
2

Influence of Thermomechanical Fatigue Loading on the Fracture Resistance of All-ceramic Posterior Crowns

Abstract - This study evaluated the fracture resistance and the survival rate of different all-ceramic crowns invitro after thermomechanical fatigue loading in comparison to porcelain-fused-to-metal posterior crowns. Sixteen crowns for human mandibular first molars were made of each of the following: Cercon, IPS-Empress 2, In-Ceram Zirconia, Procera AllZircon and porcelain-fused-to-metal. Half of the specimens of each group was thermocycled and dynamically loaded using a chewing simulator. All samples were thereafter tested for the maximum fracture resistance. The survival rates after 1-2 million cycles in the artificial mouth were 100% in all the tested crown systems. The chewing simulation and thermocycling did not significantly decrease the fracture strength of the ceramic crowns (P> 0.005). The median fracture load of Cercon, Procera AllZircon, In-Ceram Zirconia and PFM was significantly higher than IPS-Empress 2 both for loaded and non loaded groups (P< 0.005) while the difference between Cercon, Procera AllZircon, In-Ceram Zirconia and PFM was not significant (P> 0.005). All-ceramic systems showed fracture load values similar to those of porcelain-fused-to-metal molar crowns and therefore may be considered for use in clinical studies.

KEY WORDS: All-ceramics; dynamic loading; fracture resistance; thermomechanical fatigue.

Article Price
£15.00
Institution Article Price
£
Page Start
50
Page End
54
Authors
Dilek Pinar Senyilmaz, Senay Canay, Guido Heydecke, Joerg Rudolf Strub

Articles from this issue

  • Title
  • Pg. Start
  • Pg. End

  1. Influence of Thermomechanical Fatigue Loading on the Fracture Resistance of All-ceramic Posterior Crowns
  2. 50
  3. 54

  1. Fabrication of a Fixed Provisional Implant Restoration A Report of Three Cases
  2. 55
  3. 59

  1. Tensile Strength of Laser Welded Cobalt-Chromium Alloy With and Without an Argon Atmosphere
  2. 60
  3. 65

  1. The Heat Emitted from Some Qth and Led Light Curing Units in Consecutive Activations A Laboratory Assessment
  2. 66
  3. 69

  1. Marginal Behaviour of Self-etch Adhesive/composite and Combined Amalgam-composite Restorations
  2. 70
  3. 77

  1. Three-Dimensional Positional Changes of Teeth Adjacent to Posterior Edentulous Spaces in Relation to Age at Time of Tooth Loss and Elapsed Time
  2. 78
  3. 83

  1. Temperature Rise During Intraoral Polymerization of Self-Cured Hard Denture Base Liners
  2. 84
  3. 88

  1. Colour Stability, Opacity and Cross-Link Density of Composites Submitted to Accelerated Artificial Aging
  2. 89
  3. 93

  1. Book Reviews
  2. 94
  3. 95