Dental True about 1° teeth: A Calcification of 1° teeth is almost complete at birth. B Calcification of all 1° teeth and permanent incisors is complete at birth. C Calcification of all permanent teeth starts at birth. D Calcification of all permanent and primary teeth except 3rd M is completed at birth. 💡 Explanation True about 1° teeth: ✓ Correct Answer: A. Calcification of 1° teeth is almost complete at birth.