A post and core restoration is used to build up tooth structure for a crown when there is not enough structure remaining. A post is placed in the root canal and a core is built up around the post to provide support and retention for the crown. Key factors in post and core design include post length and diameter, surface texture, and luting agents to provide retention, as well as post design and cement layer to provide resistance to stresses. Custom post and cores are made using direct or indirect techniques involving impression taking, while prefabricated posts are used for circular root canals.

2. A post and core is a dental restoration used to sufficiently build-up tooth structure for future restoration i.e crown when there is not enough tooth structure to properly retain the crown.

3. post is placed within the body of the root of a tooth that has already treated with root canal treatment. The core is the part of the restoration that shows out in the mouth that help anchor a cap or crown

13. Prefabricated post and core system

15. Prepare the root canal according to your usual procedure (Gates,paesso reamers ] the post is chosen according to the canal's diameter, not to the root's.

16. Prepare the composite bonding cement, coat the post Insert it immediately into the canal

17. Fit the core form boxing system Fill up with the core composite while pressing and polymerize

29. Indirect technique of making custom post and core