[Focus on post and cores].

Inspite of the new technics using composite resin, cast dowel and core is still used to replace lost coronal structure of endodontically treated teeth. Before the core preparation, an X-ray is essential. The metal used for the post and core must be the same as the one used later for the following full crown. Preparation methods must be well established. Acrylic resin or silicone may be used as impression technics.