Development L15 - tooth development and developing occlusion

Question 1

why it is only in specific areas that a tooth forms?

Answer 1

The reason for this is down to a couple of transcription factors

The first transcription factor is PitX2 this is very important in tooth development as once oral cavity is formed then it is only expressed in Dental epithelium.

Shh is also over-ecpressed. Shh increaases cell proliferation

Question 2

transcription factor PitX2 is only expressed where

Answer 2

dental epithelium

Question 3

when do primary teeth start tpo erupt

Answer 3

6 months

Question 4

which primary teeth erupts first

Answer 4

lower central incisor

Question 5

• When is the primary dentition complete?

Answer 5

The complete set of primary teeth is in the mouth from the age of 2 ½ to 3 years of

Question 6

• When does the mixed dentition stage begin?

Answer 6

ages 6-7 years

Question 7

When is the permanent dentition established?

Answer 7

ages 10-12 years

Question 8

Which teeth erupt first in mixed dentition stage

Answer 8

lower central incisors

Question 9

What are the 2 main phases of the mixed dentition stage?

Answer 9

• 6-8 (incisors and 1st molars)