Endodontic retreatment often includes removal or disassembly of the coronal restoration and post and core. One of the challenges is to create straight-line access to the root canal system while preserving as much sound tooth structure as possible. Once the root canal treatment is completed, immediate restoration of the tooth is recommended, because coronal leakage is a potential cause of endodontic failure. In particular post spaces should be restored immediately because of the difficulties associated with maintaining the temporary seal. For that reason, it would be beneficial if the clinician who performs the endodontic treatment, were also able to place the post and core. This presentation will give an overview of modern treatment concepts when retreating and restoring endodontically treated teeth. Topics to be discussed will include coronal disassembly, reuse of existing crowns, removal of various types of posts and prevention of possible procedural errors, the rationale for and against the use of posts and the selection and use of composite core materials. Various clinical cases with long-term follow-up will be discussed to illustrate decision making and current treatment procedures.
Determine the feasibility of crown removal
Describe current instruments and procedures for coronal disassembly
Describe the clinical procedure for removal of various types of posts