Eruption of 1st molar permanent tooth occurs at the age of:
b. 6-7 years(Ref: Nelson's 20/e p 1768-1771, Ghai 8/e p 11)Permanent dentition begins at 6 years and is completed by 12 years (except for 3rd molar).
4-5 years
6-7 years
7-8 years
8-10 years
Growth, Development, and Behavior