An evaluation of post length within the elastic limits of dentin

Fracture Resistance of Teeth Restored with Post-retained Restorations: An Overview

“…In order to obtain adequate fracture resistance, at least 1:1 crown:root ratio should be ensured and the post should extend beyond the level of alveolar bone (77). Surgical crown lengthening can reduce the crown:root ratio and predispose tooth fracture.…”

“…Adhesive cements, ferrule effect, and full coronal restoration may reduce the effect of post length on the tooth fracture resistance (77,84).…”

“…Longer posts provide greater rigidity and less root bending than short posts (13). An endodontic post should extend beyond the level of alveolar bone to provide better root support (77).…”

Influence of different posts and cores on marginal adaptation, fracture resistance, and fracture mode of composite resin crowns on human mandibular premolars. An in vitro study

“…Studies indicate that the tooth is less prone to fracture when less dental hard tissue is removed during treatment. 1,2 On the other hand, endodontic therapy is often necessitated by pulpal infection after substantial hard-tissue loss by caries or following extensive tooth preparation for crown-and bridgework. In both cases, much hard tissue has already been lost before root canal therapy.…”

Retentive Force of Three Fiber-reinforced Resin Composite Posts and a Zirconia Post Cemented with Two Adhesive Luting Agents: In Vitro Study

“…This was because canal obturation has little or no effect on root strength [18][19][20] . However, if the obturation procedure had been performed using endodontic sealer containing eugenol, the eugenol might affect the setting characteristics and bonding properties of the resin cement.…”