Riva Sharples | Editor
This month, in honor of Children’s Dental Health Month, The Republic newspaper is shining a spotlight on children and their dental health. This week, let’s look at the four stages of tooth development.
Stage 1 and 2: Inside the Womb
Teeth start developing in the unborn baby. Good nutrition from the mother during pregnancy is important in tooth development. The mother’s diet should have adequate amounts of calcium, phosphorus, vitamin C, and vitamin D. Certain medicines (such as tetracycline) should not be taken during pregnancy. These can cause the unborn baby’s developing teeth to be discolored. There are four main stages of tooth development:
The first stage begins in the unborn baby at about 6 weeks of pregnancy (gestation). This is when the basic substance of the tooth forms.
Next, the hard tissue that surrounds the teeth is formed around 3 to 4 months of gestation.
Stage 3: After Birth
After the child is born, the next stage occurs when the tooth actually sticks out (protrudes) through the gum. These are “primary teeth” or “baby teeth.”
Every child is different. But the baby or primary teeth begin to come in (erupt) between the ages of 6 and 12 months. Most of the primary teeth will come in by 33 months. Girls tend to have their teeth come in before boys. The following are general guidelines for the eruption of the baby teeth:
The first tooth to come in is usually a middle front tooth on the lower jaw. This is called the central incisor. This is followed by the second central incisor on the lower jaw.
Next, the 4 upper incisors usually come in.
This is followed by the first 4 molars, and the remaining bottom 2 lateral incisors. Lateral incisors are beside (lateral to) the central incisors. Next, the 4 first molars come in.
Then the cuspids, or the pointed teeth, appear.
Often, after the child reaches 2 years old, the 4 second molars (the last of the baby teeth) appear.
The teeth on the upper jaw often erupt 1 to 2 months after the same tooth on the lower jaw. There are a total of 20 primary teeth. Often, about 1 tooth comes in per month once the teeth start coming in. There is normally a space between all the baby teeth. This leaves room for the larger permanent teeth to erupt.
Stage 4: Permanent Teeth Arrive
The final stage of tooth development in humans is that the child loses the primary or baby teeth for permanent teeth.
Your child will begin losing his or her primary teeth around age 6. The first teeth to be lost are usually the central incisors. This is followed by the first permanent molars coming in. The last baby tooth is often lost around age 12. This is the cuspid or second molar. There will be a total of 32 permanent or adult teeth.