When rct has been performed and excessive loss of tooth structure is evident then your dentist in order to strengthen your tooth might opt for inserting a post in the canal and building it up in order to ensure the success of the treatment.
Posts may be inserted in one or more canals depending on the clinical evaluation.
At our clinic we use the “para post” system from “whaledent” switzerland.the post and core build up procedure in most cases needs to be give a custom made crown.