about tooth numbering system

1. Moamer Gabsa
BDS,diploma of research method
NUMBERING SYSTEM
Moamer Gabsa- Alneelain university

2. OBJECTIVE
By the end of this lecture you can be able to :
•Know the nomenclature of tooth
•Identify the common types of tooth numbering system .
•Know why we used this numbering system
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3. DENTAL NOMENCLATURE
By words
•Set: Deciduous or permanent
•Jaw: Maxillary or mandibular
•Side: Right or left
•Order within a class
• Central or lateral
• First/second/third
•Class: Incisor/canine/premolar/molar
Example : permanent mandibular right central incisor
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4. •permanent maxillary right central incisor 1
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5. Of the many systems, the three most commonly used will be
described.
A.Palmer Notation Method
B.Universal Numbering System
C.FDI System
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6. • Numbering systems in dentistry serve as abbreviations.
Instead of writing out the entire name of a tooth, such as
permanent maxillary right central incisor, it is much simpler
to assign it a :
• Number
• letter
• symbol
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7. Moamer Gabsa- Alneelain university

8. PALMER NOTATION METHOD
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9. • Approved by American Dental Association in 1947
• Tooth is represented by a number 1 – 8 (permanent) or a letter
A – E (deciduous)
• Two lines; indicates which quadrant the tooth belongs to
• a horizontal representing the occlusal plane
• a vertical representing the midline
• Examples:
• Permeant Maxillary right central incisor
• Deciduous Mandibular left second molar
1
E
Palmer/Zsigmondy notation system
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10. E D C B A
E D C B A A B C D E
A B C D E 8 7 6 5 4 3 2 1
8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
DeciduousDeciduous PermanentPermanent
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11. Tooth Code
Central incisor 1
Lateral incisor 2
Canine 3
First premolar 4
Second premolar 5
First molar 6
Second molar 7
Third molar 8
Tooth Code
Central incisor A
Lateral incisor B
Canine C
First molar D
Second molar E
Permanent
Deciduous
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12. Right Left
Mandibular
Maxillary
Maxillary Left
Maxillary Right
Mandibular Left
Mandibular Right
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14. UNIVERSAL NUMBERING SYSTEM
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15. • Palmer – difficulty in keyboard typing
• ADA adopted the universal system in 1968
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16. • Letters for deciduous teethLetters for deciduous teeth
• Consecutive from A to T
• Following a clockwise order from maxillary right second molar to
mandibular right second molar
A B C D E
T S R Q P O N M L K
F G H I J
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17. • Numbers for permanent teethNumbers for permanent teeth
• Consecutive from 1 to 32
• Following a clockwise order from maxillary right third
molar to mandibular right third molar
1 2 3 4 5 6 7 8
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
9 10 11 12 13 14 15 16
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18. Tooth Code
Third molar 1
Second molar 2
First molar 3
Second
premolar
4
First premolar 5
Canine 6
Lateral incisor 7
Central incisor 8
Right maxillary
Tooth Code
Central incisor 9
Lateral incisor 10
Canine 11
First premolar 12
Second
premolar
13
First molar 14
Second molar 15
Third molar 16
Tooth Code
Third molar 17
Second molar 18
First molar 19
Second
premolar
20
First premolar 21
Canine 22
Lateral incisor 23
Central incisor 24
Right mandibularLeft mandibularLeft maxillary
Tooth Code
Central incisor 25
Lateral incisor 26
Canine 27
First premolar 28
Second
premolar
29
First molar 30
Second molar 31
Third molar 32
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19. Tooth Code
Central incisor F
Lateral incisor G
Canine H
First molar I
Second molar J
Tooth Code
Second molar A
First molar B
Canine C
Lateral incisor D
Central incisor E
Left maxillaryRight maxillary
Tooth Code
Second molar K
First molar L
Canine M
Lateral incisor N
Central incisor O
Tooth Code
Central incisor P
Lateral incisor Q
Canine R
First molar S
Second molar T
Left mandibular Right mandibular
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20. Moamer Gabsa- Alneelain university

21. FDI NUMBERING SYSTEM
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22. •Proposed by FDI & adopted by WHO
•Each tooth is allocated a two-digit number; the left
designates the quadrant and the right designates the tooth
order
•Examples
• Mandibular right permanent canine 43
• Maxillary left deciduous lateral incisor 62
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23. Permanent
Deciduous
Quadrant Code
Right maxillary 1
Left maxillary 2
Left mandibular 3
Right mandibular 4
Quadrant Code
Right maxillary 5
Left maxillary 6
Left mandibular 7
Right mandibular 8Moamer Gabsa- Alneelain university

24. Tooth Code
Central incisor 1
Lateral incisor 2
Canine 3
First premolar 4
Second premolar 5
First molar 6
Second molar 7
Third molar 8
Tooth Code
Central incisor 1
Lateral incisor 2
Canine 3
First molar 4
Second molar 5
Permanent
Deciduous
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25. 55 54 53 52
51
85 84 83 82
81
71 72 73 74
75
61 62 63 64
65
18 17 16 15 14 13 12
11
48 47 46 45 44 43 42
41
21 22 23 24 25 26 27
28
31 32 33 34 35 36 37
38
Permanent
Deciduous
FDI NUMBERING SYSTEM
(TWO DIGIT SYSTEM)
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26. Right maxillary
Tooth Code
Central incisor 21
Lateral incisor 22
Canine 23
First premolar 24
Second
premolar
25
First molar 26
Second molar 27
Third molar 28
Right mandibularLeft mandibularLeft maxillary
Tooth Code
Central incisor 41
Lateral incisor 42
Canine 43
First premolar 44
Second
premolar
45
First molar 46
Second molar 47
Third molar 48
Tooth Code
Central incisor 11
Lateral incisor 12
Canine 13
First premolar 14
Second
premolar
15
First molar 16
Second molar 17
Third molar 18
Tooth Code
Central incisor 31
Lateral incisor 32
Canine 33
First premolar 34
Second
premolar
35
First molar 36
Second molar 37
Third molar 38
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27. Tooth Code
Central incisor 61
Lateral incisor 62
Canine 63
First molar 64
Second molar 65
Left maxillaryRight maxillary
Tooth Code
Central incisor 81
Lateral incisor 82
Canine 83
First molar 84
Second molar 85
Left mandibular Right mandibular
Tooth Code
Central incisor 51
Lateral incisor 52
Canine 53
First molar 54
Second molar 55
Tooth Code
Central incisor 71
Lateral incisor 72
Canine 73
First molar 74
Second molar 75
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28. • Some times we used the hash (#) before the two digit (FDI
system) to differentiate between universal codes and FDI codes
• #22 = permanent maxillary left lateral incisor
• 22 = permanent mandibular left canine
18 17 16 15 14 13 12
11
48 47 46 45 44 43 42
41
21 22 23 24 25 26 27
28
31 32 33 34 35 36 37
38
1 2 3 4 5 6 7 8
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
9 10 11 12 13 14 15 16
FDI system Universal system
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29. ANY QUESTION ?
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Summary

31. REFERENCES
• Bunn S (19 May 2006). "Tooth Numbering". Retrieved 2010-04-21
• WHEELER’S DENTAL ANATOMY, PHYSIOLOGY, ISBN: 978-1-4160-6209-7
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