This fact is from Eruption Chronology in Pedodontics. It is a commonly tested concept in NEET MDS examinations. Understanding this fact is crucial for answering MCQs correctly.
First primary tooth = mandibular central incisor at 6 months
First permanent tooth = mandibular first molar at 6 years
Neonatal teeth = first 30 days
Nolla stages of tooth development 0 to 10
Primary dentition complete by 2.5 to 3 years
Ugly duckling stage = normal spacing 8-9 years
Mixed dentition = 6 to 12 years.