[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit ::
Main Menu
Journal Information::
Editorial Policies::
Articles archive::
For Authors::
Contact us::
Site Facilities::
::
Search in website

Advanced Search
Receive site information
Enter your Email in the following box to receive the site news and information.
Last site contents
:: Contact Us
:: Volume 18, Issue 2 (Foll Text in Persian 2006) ::
J Iran Dent Assoc 2006, 18(2): 58-64 Back to browse issues page
Comparison of the effect of shoulder and contra bevel preparation on fracture resistance of teeth restored with cast posts
Shojaedin Shayegh * 1, Fereshteh Gangy
1- , sha13417@yahoo.com
Abstract:   (17483 Views)

Comparison of the effect of shoulder and contra bevel preparation on fracture resistance of teeth restored with cast posts

 Dr. SA. Shayegh* - Dr. F. Gangy**

 *- Assistant Professor of Prosthodontics Dept. - Faculty of Dentistry – Shahed University of Medical Sciences.

**- Dentist.

 Background and Aim: Studies concerning the effects of post-core design on fracture resistance of endodontically treated teeth remain controversial. The aim of this in vitro study was to compare the effect of two post-core designs on the fracture resistance of endodontically treated teeth

Materials and Methods: Sixty extracted human maxillary central and canine incisors with similar root dimensions were selected for this study. The crowns were sectioned from 4mm above the buccal CEJ line. All crowns were prepared with 1 mm reduction and a chamfer finish line. After mounting and endodontic therapy, the teeth were randomly divided into 3 groups: Group 1 (control): restored with self-cured composite (no posts) Group 2: restored with cast post-cores and a shoulder preparation Group 3: restored with cast post-cores and a contra bevel preparation. Each specimen was subjected to load (N) on the lingual surface at a 135° angle to the long axis with an Instron material testing machine until fracture at a crosshead speed of 2 mm/min. One way analysis of variance and t-test were used to compare the results.

Results: The mean fracture resistance for groups 1, 2 and 3 was 534.62 N, 709.38 N and 1395.94 N, respectively. The fractures in group 1 were restorable in 61.5% of the specimens, and in group 2 and 3 in 12.5% of the cases. There were no statistically significant differences between the three groups.

Conclusion: Within the limitations of this study neither of the two tested post-core designs, improved the strength of the endodontically treated anterior teeth.

Key words: Shoulder - Contra bevel - Post-core - Root fracture

Keywords: Shoulder, Contra bevel, Post-core, Root fracture
Full-Text [PDF 383 kb]   (3375 Downloads)    
Type of Study: Research | Subject: General
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA


XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Shayegh S, Gangy F. Comparison of the effect of shoulder and contra bevel preparation on fracture resistance of teeth restored with cast posts. J Iran Dent Assoc 2006; 18 (2) :58-64
URL: http://jida.ir/article-1-54-en.html


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 18, Issue 2 (Foll Text in Persian 2006) Back to browse issues page
Journal of Iranian Dental Association

AWT IMAGE

This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly

Persian site map - English site map - Created in 0.04 seconds with 37 queries by YEKTAWEB 4645