Monster cavity under filling- Can tooth be saved?

This patient had a large silver filling with a pin. Extensive decay underneath the filling would lead someone to consider extracting it. The patient was able to avoid needing a root canal at this time but knows this will most likely happen. A crown should be placed on the tooth but the patient can only afford a large filling at this time. Craig S Kohler DDS MBA MAGD practices in Wilmette, IL. Visit him at his website at