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Effect of ferrule height and glass fibre post length on fracture resistance and failure mode of endodontically treated teeth
Author(s) -
Abdulrazzak Shurooq S.,
Sulaiman Eshamsul,
Atiya Basim K.,
Jamaludin Marhazlinda
Publication year - 2014
Publication title -
australian endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.703
H-Index - 34
eISSN - 1747-4477
pISSN - 1329-1947
DOI - 10.1111/aej.12042
Subject(s) - ferrule , materials science , post and core , fracture (geology) , maxillary central incisor , dentistry , composite material , orthodontics , crown (dentistry) , medicine , optics , optical fiber , physics
Abstract The purpose of this study was to evaluate the combined effect of ferrule height and post length on fracture resistance and failure mode of endodontically treated teeth restored with glass fibre posts, composite resin cores and crowns. Ninety human maxillary central incisors were endodontically treated and divided into three groups ( n = 30) according to the ferrule heights: 4, 2 and 0 mm, respectively. Post spaces in each group were prepared at 2/3, 1/2 and 1/3 of the root length ( n = 10). The specimens were received fibre posts, composite resin core build up and cast metal crowns. After thermocycling, compressive static load was applied at an angle of 135° to the crowns. Two‐way analysis of variance showed significant differences in the failure load in the ferrule height groups, no significant differences in post length groups and no significant interaction between ferrule heights and post lengths. More restorable failure modes were observed.