Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The post is suitable for those types of fractures in which the fracture line passes apical to the crown. In the first stage it is necessary to examine the patient in order to be sure that there is no sign of any fracture in the mandible or maxilla, then analyse the possibility of treatment of the fractured tooth canal. In addition, the condition of the tooth for using the bur requires to be checked as well. In the situation of having suitable condition, after treatment and preparation of the root canal, it is possible to use this type of post-core. The root canal requires a two different sizes preparation. In this case the post and core are separate and they will be joined together in the second stage. By rotating the serrated post that is fixed to the special core the system keeps the broken parts together.

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