Interceptive Orthodontics I

Question 1

describe the pre-eruptive phase of tooth eruption

Answer 1

starts when crown starts to form and ends when crown formation complete/root formation about to start

Question 2

describe the eruptive phase of tooth eruption

Answer 2

starts as soon as the root starts to form and ends when the teeth reach the occlusal plane

Question 3

describe the post-eruptive phase of tooth eruption

Answer 3

tooth movement/eruption continues as the root forms and throughout life in extremely small increments

Question 4

what are the 2 phases within the eruptive phase of tooth formation?

Answer 4

Intra-osseous

Extra-osseous

Osseous = within bone

Question 5

what should you do in a paediatric patient if they have an unerupted central incisor and its not coming through?

Answer 5

1. remove primary teeth in the way & any supernumeraries
2. create space/maintain space
3. monitor for 12 months to see if eruption occurs
4. Expose the tooth’s crown surgically and apply orthodontic traction

Question 6

what is a problem when early loss of deciduous teeth occurs?

Answer 6

causes localised crowding

Question 7

what is a balancing extraction and why would you do it?

Answer 7

removal of tooth from the opposite side of SAME ARCH

Preserve symmetry

Question 8

what is a compensating extraction and why would you do it?

Answer 8

removal of a tooth from OPPOSING QUADRANT

maintain buccal occlusion

Question 9

what is the IOTN and what does it stand for?

Answer 9

index of orthodontic treatment

A scale designed to measure the orthodontic need of a patient