Universal Numbering System

[1][2] Most of the rest of the world uses the FDI World Dental Federation notation, accepted as an international standard by the International Standards Organization as ISO 3950.

[3] However, dentists in the United Kingdom commonly still use the older Palmer notation despite the difficulty in representing its graphical components in computerized (non-handwritten) records.

Then the count begins at the mandibular left third molar, designated number 17, and continues along the bottom teeth to the right side.

Each tooth has a unique number or letter, allowing for easier use on keyboards.

Permanent teeth and their assigned numbers (Universal Tooth Numbering System) Upper right Upper left Lower left Lower right

Universal numbering system. This is a dental practitioner view, so tooth number 1, the rear upper tooth on the patient's right, appears on the left of the chart.
Comparison of alphanumeric notation, Palmer notation, ISO 3950 (FDI) notation, Universal Numbering System, and paleoanthropology notation