The effect of post type and length on the fracture resistance of endodontically treated teeth

Abstract

The stiffness and the load to initial fracture of the teeth restored with ParaPost XP posts were higher compared with the fiber-reinforced post groups.

Fracture resistance of endodontically treated teeth using fiber post with an elastic modulus similar to dentin

“…Panavia F 2.0 has demonstrated high shear bond strength between root dentin and FRC posts, therefore it was used as a luting agent between the root dentin and the FRC post 24) . A previous study suggested that the use of cast, prefabricated metal posts and with different lengths affected fracture resistance 7) . However, disparity between the elastic modulus of cast, prefabricated metal posts, and dentin can result in unequal stress distribution and stress concentration in the dentin, leading to root fracture.…”

“…Despite their popularity, a cast post and core has some disadvantages, which may affect the long term success of the restoration, including uneven stress distribution, biological side effects due to microleakage and corrosion, and color reflection of the cast post and core on all-ceramic restorations 6) . The most common failure of the cast post and core is post dislodgement, which leads to root fracture because of uneven stress distribution 7,8) . The mean value of the elastic modulus of dentin is reported to be 13.3+4.0 GPa, with a range of .…”

“…Post debonding has been reported as the most common complication contributing to the incidence of root fracture 7) . Increasing post length improves retention; however, in the apical region of the canal, the bonding between the post and dentin is unpredictable 5,7) .…”

“…Post debonding has been reported as the most common complication contributing to the incidence of root fracture 7) . Increasing post length improves retention; however, in the apical region of the canal, the bonding between the post and dentin is unpredictable 5,7) . The use of adhesive resin cement resulted in increased tensile strength between short FRC posts and root dentin, and improved fracture resistance 13,14) .…”

“…Moreover, restoring ETT using an FRC post and a metal crown with or without a ferrule did not result in significant differences in fracture resistance 20) . It has also been demonstrated Fracture resistance of endodontically treated teeth using fiber post with an elastic modulus similar to dentin that the placement of a metal crown can obscure the effects of different post and core built-up techniques 7) . The effect of different post lengths, presence/absence of a ferrule, and presence/absence of a metal crown on the fracture resistance of ETT remains unresolved.…”