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Orthodontic Therapy 2019 > IOTN > Flashcards

IOTN Flashcards

1
Q

What dose the IOTN measure?

A

IOTN measures the worst feature of a malocclusion

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2
Q

What dose IOTN stands for?

A

Index of Orthodontic treatment need

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3
Q

Talk about IOTN

A

Two elements Dental health (DHC) & Aesthetic components (AC)
DHC = to standardize the need for treatment
Attempt to rank malocclusion using the worse feature
Intention to identify individuals who would most likely benefit from orthodontic treatment
AC = Aesthetics of an individual can be identified and rated to a common scale

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4
Q

DHC - what is it used for?

A

Categorizes the severity of malocclusion into 5 Grades

Order of severity relative to the long term detrimental effects on the dentition

Hierarchical order acronym M.O.C.D.O.

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5
Q

MOCDO - What dose it stands for?

A 
M- Missing teeth
O- Overjets (including reverse)
C- Crossbites
D- Displacement of contact points  
O-  Overbites (including open bites)
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6
Q

DHC - talk about grades

A

Grades 1 – 5
1 lowest 5 highest score

Grade 3 Moderate need for treatment

Grade 4 and 5 Definite need for treatment
Grade 1 and 2 no need for tretment

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7
Q

DHC - ‘‘a ‘’

A

a overjet

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8
Q

DHC - ‘‘b ‘’

A

b reverse overjet

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9
Q

DHC - ‘‘c’’

A

c crossbite

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10
Q

DHC - ‘‘d’’

A

d displacement

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11
Q

DHC - ‘‘e

A

e open bite

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12
Q

DHC - ‘‘f

A

f deep bite

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13
Q

DHC - ‘‘g

A

g good occlusion

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14
Q

DHC - ‘‘h

A

h hypodontia

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15
Q

DHC - ‘‘t

IOTN?

A

t part erupted, tipped, impacted

4t Partially erupted teeth, tipped and impacted against adjacent teeth

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16
Q

DHC - ‘’s

IOTN?

A

s submerged teeth

5s Infraoccluded deciduous teeth

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17
Q

DHC - ‘‘p

IOTN?

A

p cleft

5p Defects of cleft lip and palate and other craniofacial anomalies

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18
Q

DHC - ‘‘l

IOTN?

A

l post lingual crossbite

4l Posterior lingual crossbite with no functional occlusal contact in one or both buccal segments

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19
Q

DHC - ‘‘i

A

i impacted

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20
Q

DHC - ‘‘x

IOTN?

A

x supernumerary

4x Presence of supernumerary teeth

21
Q

Aesthetic Component - talk about it

A

Scale of ten colour photographs showing different levels of dental attractiveness

Score reflects the aesthetic impairment

Developed to assess the impact of the appearance of the malocclusion on the patient

To determine the level of potential psychological damage

Used in conjunction with DHC
Patients can compare their teeth to photos

But it is subjective and difficult to accurately assess

22
Q

AC - grades

A

Grades 1 –10
1 most attractive 10 least attractive
Aesthetic =/> 6 qualify for NHS treatment
Grade 6 & 7 moderate /borderline need
Grade 8,9 & 10 Definite need for treatment

23
Q

AC - guidlines

A

The anterior teeth should be graded in their dental attractiveness as seen
No attempt should be made to predict the future appearance of the dentition
Stained restorations, chipped teeth, poor gingival conditions etc should be ignored in this assessment

24
Q

IOTN 5i

A

Impeded eruption of teeth (except 8s) due to crowding, displacement, the presence of supernumerary teeth, retained deciduous teeth and any pathological cause

25
Q

IOTN 5h

A

5h Extensive hypodontia with restorative implications

> 1 tooth missing in any quadrant requiring pre-restorative orthodontics

26
Q

IOTN 5a

A

5a Increased overjet greater than 9mm

27
Q

IOTN 5m

A

Reverse overjet >3.5mm
with reported masticatory
and speech
difficulties

28
Q

What is the IOTN ?
Less extensive hypodontia
requiring pre-restorative orthodontics or
orthodontic space closure to obviate the need for a prosthesis

A

4h

29
Q

IOTN 4a

A

4a Increased overjet > 6mm = 9mm

30
Q

IOTN 4b

A

4b Reverse overjet

>3.5mm with no masticatory or speech difficulties

31
Q

IOTN 4m

A

Reverse overjet >1mm but

32
Q

IOTN 4c

A

4c Anterior or posterior crossbites with >2mm discrepancy between rcp and icp

33
Q

What is the IOTN ?

Severe contact point displacements > 4mm

A

4d

34
Q

IOTN 4e

A

4e Extreme lateral or anterior open bites >4mm

35
Q

IOTN 4f

A

4f Increased and complete overbite with gingival or palatal trauma

36
Q

What is the IOTN?

Increased overjet >3.5mm but =6mm with incompetent lips

A

3a

37
Q

IOTN 3b

A

3b Reverse overjet > 1mm = to 3.5mm

38
Q

IOTN 3c

A

3c-Crossbite<2mm discrepancy between rcp icp

39
Q

IOTN 3d

A

3d Contact point displacements>2mm=4mm

40
Q

IOTN 3e

A

3e Lateral or anterior open bite > 2mm = 4mm

41
Q

IOTN 3f

A

3f Deep overbite complete on gingival or palatal tissues but no trauma

42
Q

IOTN 2a

A

2a Increased overjet >3.5=6mm with competent lips

43
Q

What is the IOTN ?

Reverse overjet > 0mm = 1mm

A

2b

44
Q

IOTN 2c

A

2c Ant or post crossbite =1mm discrepancy between rcp and icp

45
Q

IOTN 2d

A

2d Contact point displacements >1mm=2mm

46
Q

IOTN 2e

A

2e Ant or post openbite >1mm = 2mm

47
Q

IOTN 2f

A

2f Increased overbite>/=3.5mm without gingival contact

48
Q

IOTN 2g

A

2g Pre-normal or post-normal occlusions with no other anomalies-includes up to half a unit discrepancy

49
Q

Extremely minor malocclusions including contact point displacements <1mm

What is the IOTN?

A

IOTN 1

Orthodontic Therapy 2019 (14 decks)

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