The Retention and Fracture Resistance of Two All-ceramic Post and Core Systems in Anterior Endodontically Treated Teeth
| Autor: | Anahita Safari, Amir Alireza Khaledi, Zeinab Shafiee, Naeeme Rahmani |
|---|---|
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Galen Medical Journal. 3:95-101 |
| ISSN: | 2322-2379 2588-2767 |
| DOI: | 10.31661/gmj.v3i2.113 |
| Popis: | 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 groupsMaterial 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 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|