IOTN essentials

Question 1

4a

Answer 1

Overjet 6-9mm

Question 2

4h

Answer 2

Less severe hypodontia requiring space closure to remove need for prosthetic restoration

Question 3

4d

Answer 3

Major contact point displacement >4mm

Question 4

5a

Answer 4

Increased overjet >9mm

Question 5

5h

Answer 5

Hypodontia with restorative implications (>1 congenitally missing tooth in any quadrant)

Question 6

5i

Answer 6

Impeded tooth eruption (except 8s) due to crowding, displacements, supernumerary teeth, retained deciduous teeth and all pathological reasons

Question 7

MOCDO (order of priority)

Answer 7

Missing, overjet, crossbite, displacement (contact point), overbite

Question 8

Which health component IOTN scores require referral?

Answer 8

All 4s and 5s

Question 9

How might someone qualify for NHS treatment by aesthetic component?

Answer 9

AC of 6+ with IOTN of 3

Question 10

Andrew’s six key goals of orthodontic treatment:

Answer 10

Class 1 molar relationship

All crowns angled mesially

Incisors inclined labially and buccal teeth inclined lingually

No rotations

No spaces

Flat occlusal planes

Question 11

Risks of orthodontic treatment

Answer 11

Iatrogenic damage - caries, root resorption, bone loss, vitality loss, soft tissue trauma,
allergy to Ni in wires, burns from etch, perio problems

TMD - weak evidence

Relapse

Profile changes

CONSENT FOR: pain/discomfort, resorption, decalcification, relapse