Tooth Eruption

Question 1

Last primary tooth to erupt?

Answer 1

Maxillary 2nd Molar

Question 2

First primary tooth to erupt?

Answer 2

Mandibular R-L Central Incisors

Question 3

Around the 1st year, a child is expected to have what teeth erupted?

Answer 3

Primary Mx + Mn incisors, and M1s

Question 4

A parent notices a new primary tooth at 12 months, what tooth is it most likely to be?

Answer 4

Mandibular M1

Question 5

When are the primary M2s expected to erupt?

Answer 5

Around a child’s 2nd birthday

Question 6

The PM2 mesial slope is … than the distal cusp slope.

Answer 6

shorter

Question 7

When do permanent teeth begin to form?

Answer 7

4 months in utero

(Md M1)

Question 8

What is the 1st succedaneous tooth to erupt?

Answer 8

Mn CI at 6-7 yrs

• Don’t get tricked - Mn M1 is NOT succedaneous, because it does not replace a primary tooth

Question 9

When do Mx + Mn M1s begin to calcify?

Answer 9

at birth

• Begin formation at 4 months in utero

Question 10

When is the initiation of calcification for the mandibular CIs?

Answer 10

3-4 months

Question 11

When do perm M3s begin to calcify?

Answer 11

8 - 10 years of age

Question 12

At eruption how much of the root is formed?

Answer 12

50%

Active eruption of teeth occurs after 1/2 of the root is formed.

Question 13

When do you have 100% root formation (apex fully developed)?

Answer 13

2-3 years after eruption