hi,
about primary teeth.
remember to add 4 teeth every 4 months starting from 7 th month
7 months----4 teeth----------- central incisors
11 month-----8 teeth----------central and lateral incisors
15month------12 teeth--------incisors and 1st molars
19month-------16 teeth--------incisors ,1st molars,canines
23 month--------20 teeth------incisors,1st molars,canines,2nd molars.