Tooth notation - permanent/adult

Case contributed by Dr Francis Deng



Patient Data

Age: 30 years
Gender: Male
Annotated image


Cropped orthopantomogram in an adult patient with a full complement of teeth.


CT - ADA Universal Numbering System

Cropped CT of the face for a different adult patient with a full complement of teeth, with annotations according to the ADA Universal Numbering System.

Case Discussion

Different nomenclatures are used for tooth numbering. The American Dental Association Universal Numbering System is most common in the United States, where the left maxillary second premolar may be referred to as "tooth #13" or "ADA 13". Palmer notation, also known as the Zsigmondy system, is commonly used in the United Kingdom but is difficult to reproduce on computer systems, so the alphanumeric modification is often preferred when typing 1. The FDI World Dental Federation notation (ISO 3950 notation) is most common in the rest of the world. 

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Case information

rID: 70397
Published: 17th Aug 2019
Last edited: 6th Oct 2020
System: Head & Neck
Inclusion in quiz mode: Included
Institution: Massachusetts General Hospital

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