IOTN

Question 1

IOTN a?

Answer 1

Overjet

Question 2

IOTN i?

Answer 2

Impeded/impacted

Question 3

IOTN m&b?

Answer 3

Reverse overjet

Question 4

IOTN p?

Answer 4

Cleft lip and palate

Question 5

IOTN s?

Answer 5

Submerged deciduous teeth

Question 6

IOTN h?

Answer 6

Hypodontia

Question 7

IOTN L?

Answer 7

Lingual cross bite

Question 8

IOTN t?

Answer 8

Tipped teeth

Question 9

IOTN x?

Answer 9

Supernumerary

Question 10

IOTN g?

Answer 10

Good occlusion

Question 11

IOTN c?

Answer 11

Crossbite

Question 12

IOTN d?

Answer 12

Displacements of contact points

Question 13

IOTN e?

Answer 13

Open bites/anterior open bites

Question 14

IOTN f?

Answer 14

Overbite/deep bite

Question 15

What does MOCDO stand for?

Answer 15

Missing teeth
Overjet 
Crossbites
Displacements of contact points 
Overbite

Question 16

What is retruded contact position?

Answer 16

The position which teeth first meet before deviating into complete intercuspation

Question 17

What is intercuspal position?

Answer 17

Complete intercuspation with the opposing teeth

Question 18

What does IOTN stand for?

Answer 18

Index of orthodontic treatment need

Question 19

What are the two components of IOTN?

Answer 19

1. Dental health component

2. Aesthetic component

Question 20

What is IOTN?

Answer 20

• ranks occlusal traits according to their severity
• attempts to identify patients who would most likely benefit from orthodontic treatment
• recently - it is a means by which patients are assessed to whether they qualify for NHS treatment

Question 21

What is the aesthetic component in IOTN?

Answer 21

• a set of 10 coloured photographs

* the clinician assessed the malocclusion by picking a photo which best represents the patient

Question 22

What are the 5 categories of severity in the dental health component?

Answer 22

1. No need
2. Little need
3. Moderate/borderline
4. Great need
5. Severe need

Question 23

What is the dental health component of IOTN?

Answer 23

• looks at the worst feature of the malocclusion that has an impact on the dental health
• used the acronym MODCO - to help identify the worst feature

Question 24

IOTN is used to determine?

Answer 24

The need for orthodontic treatment

Question 25

What is the disadvantages of the aesthetics component in IOTN?

Answer 25

* all the same just presenting more crowding | * no examples of anterior open bites, class III or posterior open bites

Question 26

Why used the acronym MOCDO?

Answer 26

Helps to identify the worst feature of malocclusion

Question 27

What is IOTN 4a?

Answer 27

Overjet more than 6mm or equal to 9mm

Question 28

What is IOTN 5a?

Answer 28

Overjet more than 9mm

Question 29

What is IOTN 5h?

Answer 29

More than one missing tooth in any quadrant

Question 30

What is IOTN 4h?

Answer 30

Only one missing tooth in any quadrant

Question 31

What is IOTN 5i?

Answer 31

Impeded / Impacted teeth

Question 32

What is IOTN 4m?

Answer 32

Reverse overjet more than 1mm but less than 3.5mm with masticstory / speech difficulty

Question 33

What is IOTN 4f?

Answer 33

Increased and complete overbite with trauma