Universal Numbering System
Definition
The North American standard. Permanent teeth are numbered 1-32 running clockwise from the maxillary right third molar. Deciduous teeth are lettered A-T in the same clockwise order.
Related terms
- FDI Notation
- The two-digit system published by the Federation Dentaire Internationale. The first digit (1-4 for permanent, 5-8 for deciduous) encodes the quadrant; the...
- Midline
- The anatomical midpoint of the dental arch dividing it into left and right halves. In notation systems, position 1 is always the...
- Palmer Notation
- A grid-based system where a bracket symbol indicates the quadrant and a number 1-8 (or letter A-E for deciduous) indicates position from...
- Quadrant
- One of four sections of the dentition: upper right, upper left, lower left, lower right. The midline divides left from right; the...
Explained in
- Tooth Numbering: FDI, Universal and Palmer SystemsThe North American standard. Permanent teeth are numbered 1-32 running clockwise from the maxillary right third molar. Deciduous teeth are lettered A-T in the...