TECHNIQUE FOR FABRICATION OF CUSTOM MADE POST WITH METAL POST AND CERAMIC CORE

Post space preparation should be completed first. Make a keyway at the coronal end of the root canal to provide adequate metal and ceramic thickness.

Select an appropriate size prefabricated plastic burnout post pattern to the prepared root canal and leave an extension for the retention of ceramic core. After lubrication of the root canal, reline the plastic post with a self curing acrylic resin material to ensure an optimal adaptation to the canal.

Finish line should be a rounded shoulder, which will provide adequate ceramic thickness.

Cast the post using a porcelain metal alloy and coat the core extension with opaque ceramic to mask the metal.

Verify the fit of the post in the canal and build up the core with self curing acrylic resin. Once the resin has polymerized, prepare the core pattern in the usual manner for an all-ceramic crown .

Remove and invest the resin core with the cast metal post. After the burnout and preheating process, heat-press the core from leucite reinforced glass-ceramic (ex : IPS impress , ivoclar , germany ) with the desired shade

After verifying the fit, cement the metal post and ceramic core assembly using a self-curing resin cement. The post-and-core is ready to undergo impression for the all-ceramic crown.

Finally cement the finished all-ceramic crown to the core.

REF : Dental Traurnatology ,21, 2005.