DENTAL
DENTALNN
UMBERING
UMBERING
SYSTEMS
SYSTEMS
Permanent Teeth
There
are are
three
different
numbering
systems
usedused
to identify
the the
teeth
in dentistry.
There
three
different
numbering
systems
to identify
teeth
in dentistry.
1.The
been
adopted
by the
ADA
in use
by most
TheUniversal
UniversalNumbering
NumberingSystem
Systemhas
was
adopted
by the
ADA
andand
is inisuse
by most
general
general
dentists
today.
dentists
today.
Tooth
number
1 is1the
tooth
farthest
backback
on the
rightright
sideside
of your
mouth
in in
thethe
upper
(maxTooth
number
is the
tooth
farthest
on the
of the
mouth
upper
illary)
jaw. Numbering
continuescontinues
along your
upper
the front
across
the to the
(maxillary)
jaw. Numbering
along
the teeth
uppertoward
teeth toward
theand
front
and to
across
tooth
farthest
backback
on the
top top
left left
sideside
number
16.The
numbers
continue
by dropping
down
tooth
farthest
on the
number
16.The
numbers
continue
by dropping
down
to the
lower
(mandibular)
jaw.jaw.
Number
17 is17the
tooth
farthest
backback
on the
left left
sideside
of your
to the
lower
(mandibular)
Number
is the
tooth
farthest
on the
of the
mouth
on the
bottom.
Numbering
continues
again
toward
the the
front
andand
across
to the
tooth
mouth
on the
bottom.
Numbering
continues
again
toward
front
across
to the
tooth
farthest
backback
on the
bottom
rightright
sideside
of you
mouth
number
32. 32.
In this
system,
thethe
teeth
thatthat
farthest
on the
bottom
of the
mouth
number
In this
system,
teeth
should
be there
are are
numbered.
If you
are are
missing
youryour
third
molars,
youryour
firstfirst
number will be 2
should
be there
numbered.
If you
missing
third
molars,
instead
of 1,will
acknowledging
missing
tooth. If you’ve
had teeth
removed
teeth
missing,
number
be 2 insteadthe
of 1,
acknowledging
the missing
tooth.
If you’veorhad
teeth
removed
the or
missing
willthe
be missing
numbered
as will
well.be numbered as well.
teeth teeth
missing,
teeth
2.The
ThePalmer
PalmerNotation
NotationNumbering
NumberingSystem
Systemis isused
usedbybysome
someorthodontists,
orthodontists,pedodontists,
pedodontists,
andand
oraloral
surgeons.
Originally
called
the the
Zsigmondy
system
afterafter
an Austrian
dentist
of that
surgeons.
Originally
called
Zsigmondy
system
an Austrian
dentist
of that
name
whowho
developed
the the
ideaidea
in 1861.
name
developed
in 1861.
TheThe
mouth
is divided
intointo
fourfour
sections
called
quadrants.The
numbers
1 through
8 and
a a
mouth
is divided
sections
called
quadrants.The
numbers
1 through
8 and
unique
symbol
is used
to identify
the the
teeth
in each
quadrant.The
numbering
runsruns
from
the the
unique
symbol
is used
to identify
teeth
in each
quadrant.The
numbering
from
center
of the
mouth
to the
back.
In the
upper
rightright
quadrant
tooth,
number
1 is1the
incisor.
center
of the
mouth
to the
back.
In the
upper
quadrant
tooth,
number
is the
incisor.
TheThe
numbers
continue
to the
rightright
andand
backback
to tooth
number
8, which
is the
third
molar.The
numbers
continue
to the
to tooth
number
8, which
is the
third
molar.The
numbers
sit inside
an L-shaped
symbol
usedused
to identify
the the
quadrant.The
L isLright
sideside
up for
numbers
sit inside
an L-shaped
symbol
to identify
quadrant.The
is right
up for
the the
teeth
in the
upper
rightleft
quadrant.The
teeth
in in
thethe
upper
leftright
use use
a backwards
L. For
the the
teeth
in the
upper
quadrant.The
teeth
upper
a backwards
L. For
bottom
quadrants,
the the
L isLupside
down
following
the the
same
pattern
from
the the
uppers.
Letters
bottom
quadrants,
is upside
down
following
same
pattern
from
uppers.
Letters
suchsuch
as UR
or URQ
for for
the the
upper
rightright
or upper
rightright
quadrant
maymay
alsoalso
identify
the the
quadas UR
or URQ
upper
or upper
quadrant
identify
rants.
quadrants.
3.The
TheFederation
FederationDentaire
DentaireInternationale
InternationaleNumbering
NumberingSystem
System(FDI).
(FDI).Internationally
Internationally the
the two-digit
two- digitsystem
systemisisused
usedworldwide.
worldwide.Every
Everybranch
branchofofdentistry
dentistryuses
usesthis
thissystem.
system.
EachEach
quadrant
is assigned
a number.The
maxillary
rightright
quadrant
is assigned
the the
number
1, the
quadrant
is assigned
a number.The
maxillary
quadrant
is assigned
number
1, the
maxillary
left left
quadrant
is assigned
the the
number
2, the
mandibular
left left
quadrant
is assigned
the the
maxillary
quadrant
is assigned
number
2, the
mandibular
quadrant
is assigned
number
3, and
the the
mandibular
rightright
quadrant
is assigned
the the
number
4.The
teeth
within
eacheach
number
3, and
mandibular
quadrant
is assigned
number
4.The
teeth
within
quadrant
are are
assigned
a number
from
1 through
8 with
1 being
the the
central
incisor
andand
8 being
quadrant
assigned
a number
from
1 through
8 with
1 being
central
incisor
8 being
the the
third
molar.
third
molar.
Justi Educational Department
Dental Numbering Systems Perm - Rev. 9/03
P ERMANENT T EETH
2
DENTAL NUMBERING SYSTEMS
ILLUSTRATED
(R) Central
Incisor
(L) Central
Incisor
11
(R) Lateral
Incisor
1
12
13
(R) Second
Bicuspid
7
2
18
8
1
32
47
7
31
(R) Second
Bicuspid
Lower
(mandibular)
(R) First
Bicuspid
(L) Second
Molar
(L) Third
Molar
17
8
38
(L) Third
Molar
7
37
(L) Second
Molar
6
5
36
35
(L) First
Molar
(L) Second
Bicuspid
4
4
22
27
26
43
25
24
1
41
(R) Central
Incisor
34
3
23
1
(L) Cuspid
32
31
(L) Central
Incisor
(L) First
Bicuspid
33
2
2
42
(R) Lateral
Incisor
Justi Educational Department
Dental Numbering Systems Perm - Rev. 9/03
28
21
3
(R) Cuspid
8
20
28
44
16
19
29
5
27
18
30
6
45
RIGHT
8
15
7
(L) First
Molar
FDI
48
46
14
Upper
(maxillary)
26
6
PALMER
(R) First
Molar
3
17
5
13
(L) Second
Bicuspid
25
UNIVERSAL
(R) Second
Molar
12
(L) First
Bicuspid
24
4
LEFT
(R) Third
Molar
6
3
11
4
UNIVERSAL
(R) Third
Molar
5
(L) Cuspid
23
10
5
PALMER
(R) Second
Molar
4
15
16
2
6
14
(L) Lateral
Incisor
22
9
7
3
FDI
(R) First
Molar
1
8
2
(R) Cuspid
(R) First
Bicuspid
21
(L) Lateral
Incisor