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Advances in Medicine
Volume 2016, Article ID 5073459, 8 pages
Research Article

Impact of a Core Ferrule Design on Fracture Resistance of Teeth Restored with Cast Post and Core

1Department of Prosthodontics, Lebanese University, School of Dentistry, P.O. Box 6573/14, Beirut, Lebanon
2Faculty of Engineering and Architecture, American University of Beirut, Mazraa-Daybess Street, Ferdawss Building, First Floor, P.O. Box 11-0236, Beirut 1107 2020, Lebanon

Received 1 April 2016; Accepted 29 May 2016

Academic Editor: James K. Hartsfield

Copyright © 2016 Loubna Shamseddine and Farid Chaaban. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Objectives. To investigate the influence of a contra bevel on the fracture resistance of teeth restored with cast post and core. Materials and Methods. Sixty plastic analogues of an upper incisor were endodontically treated and prepared with 6° internal taper and 2 mm of ferrule in order to receive a cast post and core. The prepared samples were divided into two groups (); the first group serves as control while the second group was prepared with an external 30° bevel on the buccal and lingual walls. All samples crowned were exposed to a compressive load at 130° to their long axis until fractures occurred. Fracture resistance loads were recorded and failure modes were also observed. Mann-Whitney test was carried out to compare the two groups. Results. Mean failure loads for the groups were, respectively, 1038.69 N (SD ±243.52 N) and 1078.89 N (SD ±352.21 N). Statistically, there was no significant difference between the two groups (). Conclusion. In the presence of a ferrule and a crown in the anterior teeth, adding a secondary ferrule to the cast post and core will not increase the resistance to fracture.