Amelogenesis Imperfecta

Question 1

What is enamel hypoplasia?

Answer 1

Enamel hypoplasia may be defined as an incomplete or defective formation of the organic enamel matrix of teeth.

Question 2

Basic type of enamel hypoplasia?

Answer 2

1. Hereditary type- amelogenesis impefecta

2. A type caused by environmental factors

Question 3

Differences between hereditary and environmental factors?

Answer 3

Hereditary type

• both deciduous and permanent dentitions usually are involved
• generally only enamel is affected

Environmental type

• either dentition may be involved and sometimes only a single tooth
• both enamel and dentin are usually affected

Question 4

Other names of amelogenesis imperfecta? 3

Answer 4

• hereditary enamel dysplasia
• hereditary brown enamel
• hereditary brown opalescent teeth

Question 5

3 main groups of amelogenesis imperfecta?

Answer 5

Witkop & Sauk 1976

1. Hypoplasia (HP)
2. Hypocalcified (HC)
3. Hypomature (HM)