Development Of The Dentition Flashcards
1
Q
Stages of tooth development?
A
- initiation
- morphogenesis
- cytodifferentiation
- matrix secretion
- dentinogenesis
- amelogenesis
- root formation
2
Q
What happens during initiation?
A
- epithelium thickens to the primary epithelial band
- grows to form the dental lamina
- divides into vestibular lamina and dental lamina
3
Q
What does the vestibular lamina give rise to?
A
Buccal sulcus
4
Q
What does the dental lamina give rise to?
A
The enamel organ
5
Q
What happens during morphogenesis?
A
- dental lamina thickens to bud stage
- ectomesenchyme cells condense to form dental papilla
- enamel organ forms a cap over the dental papilla
6
Q
What does the dental papilla give rise to?
A
Dentine and pulp
7
Q
What happens during cytodifferentiation?
A
- bell stage
- tooth shape becomes defined
8
Q
What happens during matrix secretion?
A
- late bell stage
- crown is well defined
- apposition of enamel and dentine begins
9
Q
What is dentinogenesis?
A
- ondontoblasts differentiate from the internal enamel epithelium
- the deposit dentine matrix
- pre dentine is mineralised
10
Q
What is amelogenesis?
A
- ameloblasts differentiate from the internal enamel epithelium
- secrete enamel
- mineralisation
11
Q
What happens during root formation?
A
- AFTER complete crown formation
- migration of cervical loop
- apical growth
- hertwigs epithelial root sheath (2 cell layers)
12
Q
How does cementum form?
A
Mesenchymal cells differentiate into cementocytes
13
Q
Order of stages of shape during dental development?
A
- bud
- cap
- bell
- late bell
