05/02/2024
A post and core is a type of dental restoration required where there is an inadequate amount of sound tooth tissue 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.
When deciding whether or not a tooth requires a post and core crown rather than a conventional crown, the following must be established:
1. Presence of an adequate ferrule (coronal tooth structure)
2. Sufficient length of canal to retain a post
3. Curvature and overall anatomy of root canal system
4. Sufficient root (radicular) dentine thickness for post preparation
5. Restorability of tooth
The benefit of placing a post into a root canal is improved retention of the crown.