Tooth Development Lecture

Question 1

Teeth develop from what germinal layers?

Answer 1

Ectoderm and mesoderm

Question 2

Give layers of enamel organ

Answer 2

Inner enamel epithelium
Stratum intermedium
Stellate (enamel) reticulum
Outer enamel epithelium

Question 3

Inner enamel epithelium forms

Answer 3

Ameloblasts

Question 4

Purpose of ameloblasts

Answer 4

Make enamel

Single layer of columnar cells

Question 5

Purpose of stratum intermedum

Answer 5

Induces differentiation of inner enamel epithelium into ameloblasts

Question 6

Purpose of enamel reticulum

Answer 6

Provides cushion to protect ameloblasts

Question 7

Purpose of enamel epithelium

Answer 7

Outer boundary of enamel organ

Question 8

Ameloblast role in making dentin

Answer 8

Ameloblasts induce mesenchymal cells of dental papilla to become odontoblasts

Question 9

Give steps of tooth development

Answer 9

1-Formation of dental lamina
2-Tooth bud of deciduous tooth forms at end of dental lamina
3-Formation of enamel organ
4-Formation of permanent tooth bud
5-Formation of crown

Question 10

Dental lamina is from what embryologic origin

Answer 10

Ectoderm

Question 11

What fills indentation of neural crest derived mesenchyme during formation of enamel organ

Answer 11

Dental papilla

Question 12

When formation of permanent tooth bud takes place where does the evagination take place for permanent tooth to form?

Answer 12

Evagination of ectoderm from lingual side (toward tongue) of dental lamina

Question 13

What layer of enamel layer is enamel pulp

Answer 13

Stellate reticulum