*Restoration of Endodontically Treated Teeth DOI: http://dx.doi.org/10.5772/intechopen.98190*

According to Caputo and Standlee the self-threaded pins and friction lock pins should not be used in endodontically treated teeth [2].

According to Johnson and Sakamura, parallel sided posts resists tensile forces 4.5 times greater than tapered posts [3].

• What is parapost?

parallel pins that are added to the prefabricated post, which provides resistance to rotation and some minimal additional retention.

According to colley parallel sided serrated posts of 5.5 mm long is more retentive than tapered post of 8 mm long [4].

• The ideal required length of the post is 2/3 the length of the root or the length of the clinical crown, whichever is longer and the diameter of the post is 1/3 of the diameter of the root [it is the maximum]
