Orthodontic Indices (IOTN index, IOFTN index, PAR index) Made Easy To Remember by Dr. Abbas Naseem: Download & Print just a click away: https://royaldentalcare.pk/product/iotn-index-ioftn-index-par-index/

1. IOTN H A B C D E F G
Missing Overjet Reverse OJ Crossbite Displacement Openbite Deepbite
Grade 1 - - - - <1mm - -
Grade 2 -
mild
- >3.5 - ≤6 mm
with
competent lips
>0 - ≤1mm with <1mm
CO-CR
discrepancy
>1 - ≤2mm >1 - ≤2mm Increase OB
≥3.5mm without
gingival contact
Pre normal
or post
normal
occlusion
with no
other
anomalies
Grade 3 -
moderate
- >3.5 - ≤6 mm
with
incompetent
lips
>1 - ≤3.5mm >1 - ≤2mm
CO-CR
discrepancy
>2 - ≤4mm >2 - ≤4mm Deepbite-
complete-on
gingival or
palatal tissue-
BUT no trauma
Grade 4 -
severe
less extensive
hypodontia (one
tooth/quadrant)
>6 - ≤9 mm M
>1 - ≤3.5mm
with recorded
speech and
masticatory
difficulties
B
>3.5mm with
no
masticatory or
speech
difficulties
>2mm CO-CR
discrepancy
>4mm >4mm Increase and
complete OB
with gingival or
palatal trauma
4 l Posterior lingual crossbite with no functional occlusal contact in one or
both buccal segments.
4.t Partially erupted teeth, tipped, and impacted against adjacent teeth.
4.x Presence of supernumerary teeth.
Grade 5 -
extreme
extensive
hypodontia (more
than one
tooth/quadrant)
>9 mm M
>3.5mm
with recorded
speech and
masticatory
difficulties
I Impeded eruption of teeth due to crowding, displacement, presence of
supernumerary teeth, retained deciduous teeth, any pathological cause.
S Submerged deciduous teeth
P Defect of cleft lip and palate.
Aesthetic component
1: most attractive
10: least attractive
1 to 4: no need of treatment
5 to 7: moderate need of treatment
8 to 10: definite need of treatment

2. IOFTN C O O O S S S O G A
Cleft Overjet Reverse OJ Openbite Scissor bite Sleep
Apnea
Skeletal
Anomalies
Overbite ULS Gingival
exposure
Asymmetry
1 2 3 4 5 6 7 8 9 10
Grade 1 1.12: Speech difficulties
1.13: Treatment purely for TMD
1.14: Occlusal features not classified below
Grade 2 -
mild
2.11: Marked occlusal cant with no effect on the occlusion Increase
overbite
but no
evidence
of dental
or soft
tissue
trauma
<3mm at
rest
with no
evidence of
gingival or
periodontal
effects
Grade 3 -
moderate
≥0 - <3mm
with no
functional
difficulties
<4mm
with no
functional
difficulties
<3mm at
rest,
but with
evidence of
gingival or
periodontal
effects
Facial
asymmetry
associated with
no occlusal
disturbance
Grade 4 - severe
or great need
≥6 - ≤9mm ≥0 - <3mm
with
functional
difficulties
<4mm
with
functional
difficulties
Increase
overbite
with
evidence
of dental
or soft
tissue
trauma
≥3mm at
rest
Facial
asymmetry
associated with
occlusal
disturbance
Grade 5 -
extreme or very
great need
Defect of
cleft lip and
palate and
other
craniofacial
anomalies
>9mm ≥3mm ≥4mm Complete
scissors bite
affecting
whole buccal
segment(s)
with signs of
functional
disturbance
and/or
occlusal
trauma
Sleep apnea
not
amenable
to other
treatment
such as
MAD or
CPAP (as
determined
by sleep
studies)
Skeletal
anomalies
with
occlusal
disturbance
as a result
of trauma
or
pathology

3. PAR SCORE ASSESSMENT FORM
PRE – TREATMENT PAR SCORE
Right Buccal Occlusion
AP Score=
Transverse Score=
Vertical Score=
Total score: x 1 =
Overjet / Anterior Crossbite:
Score=
Total score: x 6=
Overbite / Open bite:
Score=
Total score: x 2=
Centerline:
Score=
Total score: x 4=
Left Buccal Occlusion
AP Score=
Transverse Score=
Vertical Score=
Total score: x1=
Upper anterior segment Lower anterior segment
R (3-2) ____ (2-1) ____ (1-1) ___
L (1-2) ____ (2-3) ____
Total score: x1 =
R (3-2) ____ (2-1) ____ (1-1) ___
L (1-2) ____ (2-3) ____
Total score: x1 =
Total Pre-Treatment PAR Score: ___
POST – TREATMENT PAR SCORE
Right Buccal Occlusion
AP Score=
Transverse Score=
Vertical Score=
Total score: x 1 =
Overjet / Anterior Crossbite:
Score=
Total score: x 6=
Overbite / Open bite:
Score=
Total score: x 2=
Centerline:
Score=
Total score: x 4=
Left Buccal Occlusion
AP Score=
Transverse Score=
Vertical Score=
Total score: x1=
Upper anterior segment Lower anterior segment
R (3-2) ____ (2-1) ____ (1-1) ___
L (1-2) ____ (2-3) ____
Total score: x1 =
R (3-2) ____ (2-1) ____ (1-1) ___
L (1-2) ____ (2-3) ____
Total score: x1 =
Total POST-Treatment PAR Score: ___
ASSESSMENT OF OUTCOME - PAR SCORE IMPROVEMENT
PAR SCORE
Change in PAR
score
% Change in PAR
score
IMPROVEMENT
Greatly improved
Improved
Worse or no
different