Leave at least of gutta-percha at the apex to ensure an adequate seal.
Post preparation (often called "post space preparation") is the clinical step of removing a portion of the root canal filling to create room for a dental post, which subsequently supports a core and crown. 55_1mp4
: To provide retention for a core buildup in teeth with insufficient remaining structure while maintaining the integrity of the apical seal. Key Measurements : Leave at least of gutta-percha at the apex