post and core
use of a metal casting, usually with a post in the pulp or root canal, designed to support and retain an artificial crown
en-GB/ˈpəʊst ən kɔːɹ/
en-US/ˈpoʊst ˈænd ˈkoʊɹi/
use of a metal casting, usually with a post in the pulp or root canal, designed to support and retain an artificial crown