Objectives: The aim of this study is to evaluate the effect of the endodontic treatment on the fatigue resistance of endodontic post adhesive interfaces. Materials and methods: 50 single-rooted human teeth have been severed at the cement-enamel junction and randomly assigned to 5 groups receiving different endodontic treatments as follows: 1) distilled water + gutta-percha (control); 2) NaOCl 5% + gutta-percha and Pulp Canal Sealer EWT (Kerr); 3) NaOCl 5% + gutta-percha and Top Seal (Dentsply-Maillefer); 4) NaOCl 5% and EDTA 10% (alternatively) + gutta-percha and Pulp Canal Sealer EWT; 5) NaOCl 5% and EDTA 10% (alternatively) + gutta-percha and Top Seal. Subsequently, Light-Post DT #2 quartz fiber posts (RTD, France) have been placed in the root canal using All-Bond 2 adhesive and Bisfil 2B cement (Bisco). Five specimens from each group have been subjected to 2.000.000 fatigue cycles ranging from 0 to 37.5 N at 8Hz frequency and 37°C water irrigation, whereas the remaining were stored in distilled water at room temperature. After the fatigue cycles, all the specimens were severed obtaining 4 sections from each tooth, which were evaluated with the push-out test at a constant speed of 1mm/min. Stereomicroscope and SEM observation were done to evaluate the interface failures. Results: no statistically significant differences were observed between the five groups in both fatigue stressed (P=0.298) and water stored specimens (P=0.093). Also, the microscope analysis of interface failures showed that the post-cement interface is weaker than the cement-dentin one. The difference was significant with P=0.001. Conclusions: the results suggest that the interface resistance is not influenced by the canal treatments adopted in this study. Probably, the hard tissue removal necessary for post placement eliminates contaminated or altered dentin that may affect the bonding with the luting cement. High resistance of cement-dentin interface strongly supports this last hypothesis.

Baldissara, P., Zicari, F., Melilli, D., Monaco, C. (2003). Effect of endodontic treatment on fatigue resistance of fiber posts bonding. In Journal of Dental Research 2003; 82 (Special Issue B).

Effect of endodontic treatment on fatigue resistance of fiber posts bonding

MELILLI, Dario;
2003-01-01

Abstract

Objectives: The aim of this study is to evaluate the effect of the endodontic treatment on the fatigue resistance of endodontic post adhesive interfaces. Materials and methods: 50 single-rooted human teeth have been severed at the cement-enamel junction and randomly assigned to 5 groups receiving different endodontic treatments as follows: 1) distilled water + gutta-percha (control); 2) NaOCl 5% + gutta-percha and Pulp Canal Sealer EWT (Kerr); 3) NaOCl 5% + gutta-percha and Top Seal (Dentsply-Maillefer); 4) NaOCl 5% and EDTA 10% (alternatively) + gutta-percha and Pulp Canal Sealer EWT; 5) NaOCl 5% and EDTA 10% (alternatively) + gutta-percha and Top Seal. Subsequently, Light-Post DT #2 quartz fiber posts (RTD, France) have been placed in the root canal using All-Bond 2 adhesive and Bisfil 2B cement (Bisco). Five specimens from each group have been subjected to 2.000.000 fatigue cycles ranging from 0 to 37.5 N at 8Hz frequency and 37°C water irrigation, whereas the remaining were stored in distilled water at room temperature. After the fatigue cycles, all the specimens were severed obtaining 4 sections from each tooth, which were evaluated with the push-out test at a constant speed of 1mm/min. Stereomicroscope and SEM observation were done to evaluate the interface failures. Results: no statistically significant differences were observed between the five groups in both fatigue stressed (P=0.298) and water stored specimens (P=0.093). Also, the microscope analysis of interface failures showed that the post-cement interface is weaker than the cement-dentin one. The difference was significant with P=0.001. Conclusions: the results suggest that the interface resistance is not influenced by the canal treatments adopted in this study. Probably, the hard tissue removal necessary for post placement eliminates contaminated or altered dentin that may affect the bonding with the luting cement. High resistance of cement-dentin interface strongly supports this last hypothesis.
26-giu-2003
81st General Session of the IADR, 2nd Meeting of the PEF
Goteborg
25-28 Giugno 2003
81st General Session
1
A stampa
Abstract n. 2562
Baldissara, P., Zicari, F., Melilli, D., Monaco, C. (2003). Effect of endodontic treatment on fatigue resistance of fiber posts bonding. In Journal of Dental Research 2003; 82 (Special Issue B).
Proceedings (atti dei congressi)
Baldissara, P; Zicari, F; Melilli, D; Monaco, C
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/280621
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact