The Retention and Fracture Resistance of Two All-ceramic Post and Core Systems in Anterior Endodontically Treated Teeth

Authors

  • Zeinab Shafiee school of dentistry, shiraz university of medical science, shiraz, Iran
  • Naeeme Rahmani school of dentistry, shiraz university of medical science, shiraz, Iran
  • Anahita Safari school of dentistry, shiraz university of medical science, shiraz, Iran
  • Amir Alireza Khaledi school of dentistry, shiraz university of medical science, shiraz, Iran

DOI:

https://doi.org/10.31661/gmj.v3i2.113

Keywords:

Ceramic post, Ceramic core, Empress Ceramic, Zirconium-based ceramic, fracture strength, retention

Abstract

Background: In anterior endodontically treated teeth a better esthetic can be achieved by using all-ceramic post -core restorations instead of metal post systems. Maximum retention and fracture resistance of the post are the criteria upon which selection of a post system is based. The aim of this study was to evaluate the fracture resistance and retention of two all-ceramic post and core systems including IPS Empress 2 post-core system and IPS Empress 2 core connected to Zirconium Cosmopost, and comparing these features among the two groups

Material and methods:  Eighty extracted maxillary central incisors and canines were divided into two groups of 40 including IPS Empress 2 and zirconium Cosmopost. To evaluate retention, shear force was applied to the cement at the crosshead speed of 0.5 mm/min; force was applied until the post was detached from the canal.  To measure the fracture resistance, the samples were loaded at 45-degrees to the horizon at the crosshead speed of 5 mm/min until fracture occurred.

Result: The mean fracture strength and standard deviation of zirconium Cosmopost and IPS Empress 2 were 302.10 N (69.922), 151.63 N (48.661), respectively. The difference between groups was significant statistically (P<0.001). The zirconium Cosmoposts had lower retention than IPS Empress2 dowel-core, but the difference between groups was insignificant (p =0.134).

  Conclusion:  Within the limitations of the study, it could be concluded that zirconium Cosmopost system may be a candidate for the restoration of anterior endodontically treated teeth, as the high fracture toughness and propitious esthetic feature.

Author Biographies

Zeinab Shafiee, school of dentistry, shiraz university of medical science, shiraz, Iran

dental student, student research committee

Naeeme Rahmani, school of dentistry, shiraz university of medical science, shiraz, Iran

dental student, student research committee

Anahita Safari, school of dentistry, shiraz university of medical science, shiraz, Iran

assisstant professor, department of prosthodontics

Amir Alireza Khaledi, school of dentistry, shiraz university of medical science, shiraz, Iran

assisstant professor, department of prosthodontics

Published

2014-05-19

How to Cite

Shafiee, Z., Rahmani, N., Safari, A., & Khaledi, A. A. (2014). The Retention and Fracture Resistance of Two All-ceramic Post and Core Systems in Anterior Endodontically Treated Teeth: . Galen Medical Journal, 3(2), e113. https://doi.org/10.31661/gmj.v3i2.113

Issue

Section

Original Article