Interceptive Orthodontics 1

Question 1

Between what ages do deciduous teeth begin to erupt ?

Answer 1

6 months to 2.5 years.

Question 2

What is a natal/neo-natal tooth ?

Answer 2

Abnormal dental development where child presents with tooth (usually lower incisor) at or just after birth.

Question 3

What are the 2 indications for XLA of nata/neo-natal teeth ?

Answer 3

Mobile and risk of inhalation.
Causing difficulty breast feeding.

Question 4

What are the 3 stages of tooth eruption process ?

Answer 4

1. Pre-eruptive phase.
2. Eruptive phase.
3. Post-eruptive phase.

Question 5

When does the pre-eruptive phase of tooth eruption start and begin ?

Answer 5

Starts when crown starts to form.
Ends when crown formation complete and root formation about to start.

Question 6

When does the eruptive phase of tooth eruption start and begin ?

Answer 6

Starts as soon as root formation starts.
Ends when teeth reach occlusal plane.

Question 7

What are the two phases of eruptive phase of eruption ?

Answer 7

Intra-osseous and extra-osseous stage.

Question 8

What is the post-eruptive phase of eruption ?

Answer 8

Tooth movement and eruption continues as root forms and throughout life in small increments.

Question 9

What are the three reasons in which movements occur during eruption ?

Answer 9

Positional changes of neighbouring crowns.
Growth of mandible and maxilla.
Resorption of the deciduous tooth roots.