01/24 Flashcards
Why is tooth development important? (3)
a. Clinically, need to know if primary tooth should be treated, pulled, or left
b. Parents want to know developmental stage of child
c. Also very useful for forensic odontology (identifying people as well as aging via data)
Types of Tooth movement (4)
Pre-eruptive
Eruptive
Post-eruptive
Exfoliation
3rd molar with root in root formation stage-over 18?
50/50
*just an interesting fact, nothing too important
When do primary teeth start to erupt
6months-2 years
When do we see eruption of 1st molars (permanent)
6yrs +/-9 months
Which erupts first? Permanent 1st molars or incisors?
1st molars
When does tooth formation begin
in utero
Second permanent teeth to come in?
Central incisors
Which tooth may come in last?
The maxillary canine
As teeth grow, what else grows with it?
The alveolar process and thus the face
In order, how does the tooth form
Crown, root, and then the apex -biting surface down to root
Is how the tooth forms (direction) variable?
No-crown to apex
First part of the tooth to form
cusp tips
How to tell the age of someone based on odontology?
Use statistics available to you
Which surface forms first, mesial or distal?
mesial
Is crown formation done before root formation
Almost
During which stage is enamel and dentin formed?
Bell
After which stage does the root form
After the bell stage
Successional lamina
The bud for the permanent tooth
What is the exception of successional lamina
The 1st molars?? They form seperately
Oldest enamel and dentin will be where?
Cusp tips
Newest enamel/dentin will be where
@CEJ
What recruits odontoblast and initiate them to secrete dentin?
Ameloblast
Initiation & formation of teeth requires the interaction of 2 types of cells:
Oral Ectoderm (Oral Epithelial Cells) Oral Mesenchyme (underlying Mesenchymal Cells)