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Dental Charts to Understand Tooth Numbering System



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dental numbering or notation systems

provide the dentist's with a standard

method for referring to particular teeth

bustled presents dental charts to

understand tooth numbering systems did

you know the universal numbering system

which is widely used in the United

States was adopted by the American

Dental Association in 1968 most adults

have 32 teeth which are referred to as

permanent teeth the first set of teeth

that appear during childhood are

referred to as primary or deciduous

teeth there are 20 primary teeth that

erupt by the age of 6 months and are

shed during childhood usually the last

primary tooth is shed by 11 - 12 years

by the time one reaches the age of 13 28

of the 32 permanent teeth have erupted

the last four permanent teeth usually

erupt by the age of 25 both the

maxillary upper jaw and mandibular lower

jaw arches contain similar types of

teeth there are four types of teeth that

are present in the upper as well as

lower jaw these are called incisors

canines premolars and molars in

dentistry permanent and deciduous teeth

are identified with the help of

numbering systems here is some

information on the classification of the

teeth and the popular numbering systems

classification of permanent and

deciduous teeth the front four teeth in

the upper and lower jaw called incisors

the two teeth in the center are called

central incisors whereas the teeth on

either side of the central incisors are

called lateral incisors these help us in

cutting or biting food canines which are

also called cuspids are slightly pointed

these help in tearing food particles

while chewing separated by the incisors

there are two canines each in the upper

and lower jaw four premolars are present

in each dental arch two premolars are

located behind each canine in both

arches

these help us crush food while chewing

molars are class

find into first second and third molars

normally six molars are present in each

dental arch these are located behind the

second premolar on both sides of each

arch these are bigger than the premolars

and help us grind food into smaller

particles the third molars are also

referred to as wisdom teeth not every

person may develop wisdom teeth

deciduous teeth are the first set of 20

teeth that appear in childhood it must

be noted that children don't have

premolars only adults have premolars

which are part of permanent teeth only

dental numbering systems it is believed

that the first dental numbering system

was proposed by a Hungarian dentist

named Adolf Sigmund II in 1861 though

more than 20 dental notation or tooth

numbering systems have been developed

over the years most dentists use one of

the three tooth numbering systems that

are given below Universal numbering

system widely used by the dentists in

the United States

Palmer notation systems D world Dental

Federation two-digit notation

international Universal numbering system

for adult even the universal numbering

system the third molar on the right in

the upper or maxillary dental arch is

assigned the number one the teeth are

numbered along with upper dental arch

from right to left as 1 to 16 with the

last molar tooth back on the top left of

the upper dental arches in number 16

similarly in the lower mandibular dental

arch or jaw the numbering continues with

the third molar on the left being given

the number 17 the teeth in the lower jaw

are numbered from left to right as 17 to

32 with the third molar or the tooth

farthest back on the bottom right side

of the mouth as the number 32 all the

adult teeth are numbered in this manner

even if the third molars are wisdom

teeth have not yet erupted or some of

the teeth have been removed due to

dental problems Universal numbering for

primary or deciduous teeth as mentioned

earlier there are a total of 20 primary

teeth in the original system

these were numbered as 1 to 20 as per

the method used for adults the only

difference was that a small letter D

followed each number to suggest that the

teeth are deciduous or primary these

days dentists use another version of the

universal numbering system for children

instead of numbering the teeth each

tooth is assigned a letter children's

teeth are assigned uppercase letters

from A through T the second primary

molar in the upper jaw on the right is

assigned the letter a' and the numbering

continues in the alphabetical order with

the second primary molar on the left in

the upper jaw being assigned the letter

J similarly in the lower jaw the second

primary molar on the left is assigned

the letter K and the numbering continues

in the order tilty which is the letter

that is assigned to the second primary

molar on the right Palmer notation

system mainly used by some orthodontists

petted on tests and oral surgeons the

Palmer notation method is the method

followed by dentists in the United

Kingdom it was earlier called the Sigma

D system after Adolph Sigma D a dentists

from Hungary who came up with this

concept of tooth numbering system in

1861 the teeth were divided into four

quadrants and the adult teeth in each

quadrant were numbered 1 to 8 whereas

the 20 primary or milk teeth were

depicted with a quadrant grid using

Roman numerals i-23 IV and V to number

the teeth from the midline kerydin

Palmer a dentist from Ohio made changes

to this dental notation replacing the

Roman numerals with letters in case of

primary teeth this notation involves the

use of a symbol plus plus plus plus for

each quadrant with the number or letter

assigned to the tooth position from the

midline that divides the teeth into four

quadrants while adult teeth in each

quadrant are numbered 1 to 8 the 5

deciduous milk teeth in each quadrant

are indicated by O to ease us number or

letter for a particular type of tooth in

the upper and lower jaw would be the

same but the symbol for the quadrant

would be different right and left

of the upper jaw would be denoted by

plus and plus respectively on the other

hand the right and left quadrants of the

lower jaw would be denoted by plus and

plus respectively though the Palmer

method was suggested for the purpose of

dental notation earlier in the United

States the American Dental Association

adopted the Universal numbering system

as it was easier to type due to the

absence of symbols the federation and

tear internationale e numbering system d

this is a two digit system that is used

worldwide for permanent or adult teeth

the mouth is divided into quadrants that

are numbered from 1 to 4 in the

clockwise direction starting from the

upper right or the right side of the

upper jaw as seen by the dentist it must

be noted that patients write would

correspond to left side of the dental

chart every tooth is numbered on the

basis of the quadrant and its position

so in the first quadrant that is right

side of the upper jaw starting from the

central incisor the central incisor will

be numbered as 11 the next tooth or the

lateral incisor in the first quadrant

will be numbered 12 the numbering of the

teeth in the first quadrant will

continue in this manner till the third

molar that will be numbered 18 similarly

the teeth in the second quadrant central

incisor to the third molar or the left

side of the upper jaw will be numbered

as 21 22 23 24 25 26 27 and 28 the adult

teeth in the third and fourth quadrant

would be numbered from 31 to 38 and 41

to 48 respectively

in case of the 20 mil teeth the mouth is

divided into four quadrants that are

numbered from 5 to 8 in the clockwise

direction starting from the upper right

or right side of the upper jaw central

incisor to second primary molar as

observed by the dentist again the

child's right would correspond to the

left side of the dental chart every

tooth is numbered on the basis of the

quadrant and its position so in the

upper right quadrant that is right side

of the upper jaw starting from the

central incisor the central incisor will

be numbered as 51 the next tooth or the

lateral incisor in the first quadrant

will be numbered 52 the numbering of the

teeth in this quadrant will continue in

this manner till the second primary

molar that will be numbered 55 similarly

the teeth in the upper left quadrant

central incisor to the second primary

molar or the left side of the upper jaw

will be numbered as 61 62 63 64 and 65

the teeth in the lower left and lower

right quadrant would be numbered from 71

to 75 and 81 to 85 respectively though

we would find it easier to refer to the

specific names given to each tooth

dental charts or tooth numbering systems

are tools used by the dentist's to refer

to the adult or primary teeth if you

look at the dental charts to understand

the tooth numbering system you will

realize that the numbering system is not

that difficult to understand