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Dental Formula Dr.MUSTAFA I.ELGHOUL B.SC,B.D.S, M.S(ORTHO)

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The denomination and number of teeth for all Mammalia are expressed by formulae. The denomination of each tooth is represented by its initial letter, I for incisor, C for canine, P for premolar. M for molar; each letter is followed by a horizontal line and the number of each type of tooth is placed above the line for the maxilla (upper jaw) and below the line for the mandible (lower jaw). The formula includes one side only.

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I 2 C 1 M 2 = The dental formula for the primary teeth in humans is:

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This formula should be read thus: Incisors, two maxillary and two mandibular; canines, one maxillary and one mandibular; molars, two maxillary and two mandibular, or ten altogether on one side, right or left.

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The permanent dental formula in humans is: I 2 C 1 P 2 M 3 =

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To complete oral examination on a patient, it is necessary to use a standardized system for tooth numbering.

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Numbering and Coding Systems of the Teeth (Nomenclature)

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ToothQuadrantArchDentition CanineRightMandibularPermanent 1 MolarLeftMaxillaryPrimary

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Universal System. Palmer Notation System. The Federation Dentaire International.

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Universal System: It uses the Arabic numbering system from 1 through 32 for Permanent Teeth. The letters A through T are used for the Primary Teeth. For the Mixed Dentition we use Arabic numbers and Letters.

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For Permanent Teeth

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For Primary Teeth

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Palmer Notation System: In this system each of the four quadrants is given its own symbol. A cross is drown, the horizontal line of which separates the maxillary teeth above from the mandibular teeth below. The vertical line represents the median line of the mouth separating the right from the left side.

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Palmer Notation System: Maxillary Left TeethMaxillary Right Teeth Madibular Left TeethMandibular Right Teeth

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For Permanent Teeth

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Maxillary Left TeethMaxillary Right Teeth Madibular Left TeethMandibular Right Teeth

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For Primary Teeth

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Maxillary Left TeethMaxillary Right Teeth EDCBAABCDE EDCBAABCDE Madibular Left TeethMandibular Right Teeth

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The Federation Dentaire International: (FDI) system assigns two numbers to each tooth in any quadrant. The first number indicates the quadrant in which the tooth is positioned and the second number identifies the specific tooth. The first numbers 1 through 4 for Permanent Dentition, 5 through 8 for the Primary Dentition.

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Permanent Dentition Maxillary Left TeethMaxillary Right Teeth Madibular Left TeethMandibular Right Teeth

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Permanent Dentition Maxillary Left TeethMaxillary Right Teeth Mandibular Left TeethMandibular Right Teeth

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Primary Dentition Maxillary Left TeethMaxillary Right Teeth Madibular Left TeethMandibular Right Teeth

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Primary Dentition Maxillary Left TeethMaxillary Right Teeth Mandibular Left TeethMandibular Right Teeth

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Thank You

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