Carl Cha tfield is a certified Project Management Professional (PMP) with extensive knowledge of Microsoft Office Project as well as specific usability issues. Timothy Johnson has previously worked as an Office Project support professional for several years. Tim possesses in-depth technical knowledge about the software.
The complete set of primary teeth is in the mouth from the age of 2 Â½ to 3 years of age to 6 to 7 years of age. Other primary tooth eruption facts: A general rule of thumb is that for every 6 months of life, approximately 4 teeth will erupt.
He states that the average age for the bottom two teeth to erupt is 4-6 months, however babies can be born with bottom teeth or they could not erupt until 15 months. Teeth eruption is very variable and sometimes upper teeth can even come in before lower teeth.