Case Study Number 432835
Persistent disease on second mandibular premolar. Tooth decay on abutment. Risks of post removal include: fracture of the tooth, leaving the tooth non restorable, root perforation, post breakage, and inability to remove the post. An additional concern is ultrasonically generated heat damage to the periodontium. Therefore, an apicoectomy and retrofilling or an extraction and replacement with an implant or a fixed prosthesis is a treatment option before initiating the retreatment. Post has been removed in 20 minutes.The use of ultrasonic energy for short periods and water cooling to prevent excessive amount of heat generation proved to be most efficient in this case. A casted post and a new crown are planned.