Table Tooth Eruption Times Teeth Number Age at Eruption * Deciduous (20 total) Lower central incisors 2 5 - 9 months Upper central incisors 2 8 - 12 months Upper lateral incisors 2 10 - 12 months Lower lateral incisors 2 12 - 15 months 1st molars† 4 10 - 16 months Canines 4 16 - 20 months 2nd molars† 4 20 - 30 months Permanent (32 total) 1st molars† 4 5 - 7 years Incisors 8 6 - 8 years Bicuspids 8 9 - 12 years Canines 4 10 - 13 years 2nd molars† 4 11 - 13 years 3rd molars† 4 17 - 25 years * Varies greatly.