Hypodontia

Question 1

Define Hypodontia

Answer 1

The missing of one or more deciduous or permanent teeth
<6

Question 2

Define Oligodontia

Answer 2

More than 6 teeth missing

Question 3

Define Anodontia

Answer 3

Total loss of teeth

Question 4

Most common teeth absent?

Answer 4

U/L 5’s
U 2’s

Question 5

What is the percentage of population missing 5’s?

Answer 5

3%

Question 6

What is the percentage of the population missing U2’s?

Answer 6

2%

Question 7

What is the prevalence of hypodontia?

Answer 7

• 6%
• more common in females

Question 8

Aetiology of hypodontia:

Answer 8

1. Genetic
2. Local- CLP
3. Syndromes - Downs and Hermifacial microsomia

Question 9

Associations with hypodontia

Answer 9

• Microdontia
• impacted canines
• transposition
• alveolar atrophy
• abnormal tooth positions
• retained deciduous teeth
• delayed dental

Question 10

IOTN for hypondontia

Answer 10

4H
5H

Question 11

IOTN for Hypodontia

Answer 11

4H
5H

Question 12

Describe 5H

Answer 12

• more than 1 tooth missing in each quad
•requiring pre resto ortho

Question 13

Describe 4H

Answer 13

• 1 tooth missing in each quad.
• Requiring pre resto ortho and space closure