Tooth development

What are the 5 stages of tooth development

1. Thickening of oral epithelium
2. Bud
3. Cap
4. Bell
5. Eruption

What is the change occurring during bud and cap

morphogenesis

What is the change occurring during bell

differentiation and mineralisation

Describe process of bud

1. Epithelium buds downwards
2. Condensation of neural-crest derived mesenchyme cells

What do the following types of tissue become in tooth development

* Epithelial tissue
* Mesenchymal tissue

Epithelial tissue → enamel organ

Mesenchymal tissue → dental papilla

Label the pink section

Label the yellow section

pink → epithelial tissue

yellow → mesenchymal tissue

What occurs during the cap stage?

Bud epithelium begins to fold inwards

Label the pink section

Label the yellow section

Label the orange section

pink → enamel organ

yellow → dental papilla

orange → dental follicle

Bell stage process

1. Early - cusp architecture begins to form
2. Late - hard tissue (enamel and dentine) develop

Describe development of hard tissue in teeth

1. Dentinogenesis
* Dentine forms downward from ameldodentinal junction
* Forms from odontoblasts
2. Amelogenesis
* Enamel form upward from ameldodentinal junction
* Forms from ameloblasts

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Describe the cervical loop

Internal and external enamel epithelium meet

How long does root development continue for after eruption?

2-3 years

Where do adult teeth develop respective to primary tooth germ

next to it

Successional lamina

Permanent dentition form, adjacent to where primary teeth are developing

Tooth bud

series of dental swelling on dental lamina

What does the primary palate fuse from

Medial nasal prominences fuse

What is contained in the primary palate?

Contains 4 maxillary incisor teeth

Formation of remainder of palate (not primary palate)

Maxillary + mandibular processes from pharyngeal arch

What is occurring here?

Thickening

What is occurring here?

Bud

What is occurring here?

Early cap

What is occurring here?

Late cap

What is occurring here?

Bell