Beautiful PFM Crown Zirconia Dental Post and Core All Teeth

1. The tooth is prepared prior to the pattern fabrication. A heated endodontic condensor is used to safely remove the gutta percha (this is best accomplished at the same time the endodontic therapy is rendered). Gates & Parapost drills are used to shape the canals to an appropriate size and depth. The most common sizes used are Brown Yellow and Red

   ---

   . 
2.  The minimum length of the post is equal to the length of the clinical crown. The recommended length is two-thirds the length of the root in bone while maintaining 5 mm of gutta-percha at the apex. Remember chances of a perforation increase as the length of the post approaches the apex of the tooth.

   ---

    

3. The prefabricated posts are inserted into the canals. In this case a precious metal post is being used in the lingual canal because the canal diameter is only equivalent to a brown sized Parapost (Gates #3 ). The precious metal posts are issued from the Dispensing Window, and require an additional fee.

   ---

    

4. An assistant holds the Duralay powder, liquid, and suction - while the core portion is made in resin. First lubricate the remaining tooth structure with a water soluble lubricant (Surgilube) then apply the resin. The assistant may move the suction near the resin, evaporating monomer from its surface, thus preventing the resin from slumping or running. 

   ---

    

5. The completed resin core is allowed to polymerize - then it is prepared to the shape of an ideal crown preparation

   ---

    

6. Using conventional diamond instruments, water and suction, the resin core is prepared in the same manner as a conventional preparation

   ---

    

7. The preparation is completed to ideal form and in this case its path of insertion is aligned with the preparation of tooth 

   ---

    

8. The completed post & core pattern is submitted to the Service Laboratory for investing & casting in gold alloy. 

   ---

    

9. The casting is cleaned and sandblasted with alumina oxide in preparation for try-in, shaping, and cementation. The canals are dried and the casting inserted using light pressure. Small shiny marks on the casting surface help indicate where adjustment should be made.