The primary teeth begin their development when the fetus is five weeks old, but do not appear in the mouth until the lower central incisors erupt at approximately six months of age. The normal ages of eruption vary greatly from child to child, although the sequence in which the teeth erupt does not.
rooksandbooks: tumblusmaximus: INFINITELY HELPFUL. So far we have those two lower central incisors with no sign of anything else. They’re so cute. I think those lateral incisors will make an appearance soon. Great reference tool. Logan is getting her top 2 right now and I can’t even imagine when she gets more! She will look so grown up!
corporisfabrica: Cutaway of mandible and maxilla, exposing teeth. Child’s mandible and maxilla - you can see the adult teeth inside their formative cavities (spaces) in the bones, ready to (and in some cases already starting to) push the baby teeth out, and replace them with the permanent set that we keep for the rest of our lives. This child was probably around 6.5 years of age, judging by the degree of eruption. From Gray’s Anatomy (1918 printing) via Wikimedia Commons.