Eruption of teeth is a process in which teeth move through the jawbone and over lying mucosa to emerge in the oral cavity. Humans are diphyodonts which means we have 2 sets of teeth during our lifetime.

Here is the eruption sequence of primary dentition: 

Lower central incisor 6-9 months

Upper central incisor 7-10 months

Upper lateral incisor 8-11 months

Lower lateral incisor 9-13 months

Upper first molar 13-17 months

Lower first molar 14-18 months

Upper canine 16-22 months

Lower canine 17-23 months

Lower 2nd molar 24-31 months

Upper 2nd molar 25-33 months

Eruption sequence of permanent dentition: 

Lower first molar 6- 7 years

Upper first molar 6-7 years

Lower central incisor 6-7 years

Upper central incisor 7-8 years

Lower lateral incisor 8-9 years

Lower canine 9-10 years

Lower first premolar 10-11 years

Upper first premolar 10-11 years

Upper 2nd premolar 10-12 years

Lower 2nd premolar 11-12 years

Upper canine 11-12 years

Lower 2nd molar 12-13 years

Upper 2nd molar 12-13 years

Lower 3rd molar   17-23 years

Upper 3rd molar 17-23 years