Tooth Numbering – Primary and Permanent Systems

Tooth Numbering - Primary and Permanent Systems

There are different notations used in the medical field, tooth numbering is also a dental notation which is concerned with the numbering of the specific teeth and is used in the US. The Numbering starts from the left upper side to the right lower side. Tooth numbering is also known as the universal numbering system. It is invented by the America so also named as the American system. There are two types of teeth one is primary and the other is permanent teeth. The Primary teeth are also named as milk teeth which broke down at the age of the 10 to twelve. After this the permanent teeth began to grow. Let’s take a look at the tooth numbering system of the Primary and the permanent teeth.

  • Primary Teeth Numbering System

 The teeth that begin to grow in the childhood are called the primary teeth. Primary teeth are number from the letters starting from A to K. The diagram that we make in the flow chart will show that the numbering starts from the upper right to the upper left and lower left to lower right. The counting is given in the table.

                      Upper right                       Upper Left
A B C D E F G H I J
T S R Q P O N M L K
                      Lower right                       Lower Left

 

The above numbering will help the dentist when he is going to operate the tooth of the patient.

  • Permanent Teeth Numbering System

The teeth that begin to grow after the breakdown of the primary teeth are called permanent teeth. Permanent teeth are number from the 1 to 32. The diagram that we make in the flow chart will show that the numbering starts from the upper right to the upper left and lower left to lower right. The counting is given in the table.

                      Upper right                            Upper Left
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
                      Lower right                       Lower Left

 

The names according to the numbering are as follow:

 

       Teeth Names      Duration after which they grow
 

 

1.      3rd molar Grow after 17 to 21 years
2.      2nd molar Grow after 12 to 13 years
3.      1st molar Grow after 6 to 7 years
4.      2nd Bicuspid Grow after 10 to 12 years
5.      1st Bicuspid Grow after 10 to 11 years
6.      Canine tooth Grow after 11 to 12 years
7.      Lateral Grow after 8 to 9 years
8.      Central incisor Grow after 7 to 8 years
9.      Central incisor Grow after 7 to 8 years
10.  Lateral incisor Grow after 8 to 9 years
11.  Cusped Grow after 11 to 12 years
12.  1st Bicuspid Grow after 10 to 11 years
13.  2nd Bicuspid Grow after 10 to 12 years
14.  1st molar Grow after 6 to 7 years
15.  2nd molar Grow after 12 to 13 years
16.  3rd molar Grow after 17 to 21 years
17.  3rd molar Grow after 17 to 21 years
18.  2nd molar Grow after 11 to 13 years
19.  1st molar Grow after 6 to 7 years
20.  2nd Bicuspid Grow after 11 to 12 years
21.  1st Bicuspid Grow after 10 to 12 years
22.  Canine tooth Grow after 9 to 10 years
23.  Lateral Grow after 7 to 8 years
24.  Central incisor Grow after 6 to 7 years
25.  Central incisor Grow after 6 to 7 years
26.  Lateral incisor Grow after 7 to 8 years
27.  Cusped Grow after 9 to 10 years
28.  1st Bicuspid Grow after 10 to 12 years
29.  2nd Bicuspid Grow after 11 to 12 years
30.  1st molar Grow after 6 to 7 years
31.  2nd molar Grow after 11 to 13 years
32.  3rd molar Grow after 17 to 21 years

 

Visit this website to learn about human tooth numbering.