Gingival retraction cord pdf

This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. A post and core crown is a type of dental restoration required where there is an inadequate amount of sound tooth gingival retraction cord pdf remaining to retain a conventional crown.

A post is cemented into a prepared root canal, which retains a core restoration, which retains the final crown. The role of the post is firstly to retain a core restoration and crown, and secondly to redistribute stresses down onto the root, thereby reducing the risk of coronal fracture. The post does not play any role in reinforcing or supporting the tooth and can in fact make it more likely to fracture at the root. Is there is a ferrule to retain a conventional crown?

Is the canal long enough to retain a post? Are there large curvatures which would make post placement difficult? Is the remaining dentine thick enough for post preparation?