Abstract
Statement of problem
How the placement of fiber posts affects the fracture resistance of endodontically
treated maxillary central incisors with cervical cavities is not well documented.
Purpose
The purpose of this in vitro study was to evaluate the effect of fiber posts on the
fracture resistance of endodontically treated maxillary central incisors with cervical
cavities.
Material and methods
Fifty extracted human maxillary central incisors were selected and divided into 5
test groups (n=10) according to the restoration strategy: GHT, control group; endodontically
treated teeth (ETT) without endodontic posts; GCV, ETT with cervical cavities simulating
coronal destruction; GCF, ETT with cervical cavities and carbon fiber posts; GGF,
ETT with cervical cavities and glass fiber posts; and GCP, ETT with cervical cavities
and composite resin posts. After the fiber posts had been cemented with a resin cement
and the foundations had been placed, all specimens were quasi statically loaded at
45 degrees in a universal testing machine until fracture. All specimens were evaluated
for fracture modes. The data were then analyzed by 1-way ANOVA, followed by multiple
comparisons with the Tukey HSD test (α=.05). The mode of failure was determined by
visual inspection.
Results
The mean ±SD failure loads for the groups ranged from 718.2 ±89.8 N to 943.8 ±93.1
N. In a 1-way ANOVA followed by post hoc testing, GGFs had a higher fracture strength
than all other groups (P≤.05). However, GCPs had a lower fracture strength than all other groups. Statistically
significant differences were observed among groups (P≤.05), except between the GHT group and the GCF and GGF groups (P=.075, P=.226). All groups except GHT showed complete favorable fracture mode within the cervical
third of the roots.
Conclusions
Within the limitations of this in vitro study, placement of glass fiber posts significantly
improved the fracture resistance of endodontically treated maxillary central incisors
with cervical cavities.
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Article info
Publication history
Published online: February 09, 2016
Identification
Copyright
Copyright © 2016 by the Editorial Council for The Journal of Prosthetic Dentistry.
