The stress evaluation of root posts using the finite element analysis

Resumo

Introduction and objective: The aim of this investigation was to
evaluate through Finite Element Analysis (FEA) the displacement
and stress distribution of prefabricated serrated and tapered dental
root posts of different compositions: carbon fiber, glass fiber and
titanium. Material and methods: Through this biomechanical analysis
a carbon fiber post (CF), a glass fiber post (GF) and a titanium
post (TI) were compared according to their design (tapered [T]) and
serrated [S]) and under a load of 250 N, at 45º, in order to simulate
an occlusal load of a canine tooth. Results: FEA demonstrated
the following maximum displacement (MXD) in millimeters: T.CF
(tapered carbon fiber post) = 2.48 mm; T.GF = 1.58 mm; T.TI =
0.50 mm; S.CF = 7.66 mm; S.GF = 4.87mm. Conclusion: These
results showed that the carbon fiber post demonstrated the greatest
displacement, followed by the glass fiber and the titanium posts.
The tapered design presented detachment values much lower than
the serrated design.