Dental In preparing an endodontically treated tooth for receiving a cast post, the minimal amount of gutta percha to be maintained for proper apical seal is A 1 mm B 8 mm C 4 mm D 0 mm 💡 Explanation In preparing an endodontically treated tooth for receiving a cast post, the minimal amount of gutta percha to be maintained for proper apical seal is ✓ Correct Answer: C. 4 mm