Click or drag across teeth to see each tooth's name and its number in all three numbering systems — Universal (US), FDI (international), and Palmer. Built with the same odontogram engine dental clinics use in DentClosers.
Tip: click a tooth to select it; drag to select several. Switch the numbering system below the chart.
No teeth selected yet — click any tooth on the chart above.
Numbers permanent teeth 1–32, starting at the upper-right third molar (1), crossing to the upper-left third molar (16), dropping to the lower-left third molar (17) and ending at the lower-right third molar (32). Primary teeth use letters A–T. This is the standard in the United States, used by the ADA and most US insurance paperwork.
Two digits: the first is the quadrant (1 = upper right, 2 = upper left, 3 = lower left, 4 = lower right for permanent teeth; 5–8 for primary), the second is the tooth's position from the midline (1 = central incisor … 8 = third molar). So tooth 11 is the upper-right central incisor and 48 the lower-right wisdom tooth. Used in most of the world and in ISO standards.
The tooth's position number (1–8) inside a bracket that indicates the quadrant (⏌⏋⏊ shapes on paper). Still common in UK orthodontics and older records. Our chart shows the Palmer position with a quadrant prefix (UR/UL/LL/LR).
Dentists divide the mouth into four quadrants seen from the dentist's point of view — so 'right' means the patient's right. Upper right, upper left, lower left, lower right. FDI numbers the quadrants 1–4 clockwise from the upper right; each quadrant holds 8 permanent teeth counted outward from the front-center midline.
Children have 20 primary teeth. The Universal system letters them A–T; FDI gives them quadrants 5–8 with positions 1–5 (e.g., 51 is the upper-right primary central incisor, 85 the lower-right primary second molar).
| Universal | FDI | Which teeth |
|---|---|---|
| A–J | 55–51 · 61–65 | Upper primary teeth, right to left (A = upper-right second molar, J = upper-left second molar) |
| K–T | 75–71 · 81–85 | Lower primary teeth, left to right (K = lower-left second molar, T = lower-right second molar) |
The Universal Numbering System — permanent teeth numbered 1 to 32 starting from the upper-right third molar, and primary teeth lettered A to T. The ADA endorses it and US insurance claims use it.
In the Universal system, teeth 8 and 9 are the two upper central incisors — your top front teeth (8 upper right, 9 upper left). In FDI notation the same teeth are 11 and 21.
Click any tooth on the chart above — it shows the Universal, FDI, and Palmer identifiers side by side. As a rule of thumb, FDI's first digit is the quadrant and second the position from the midline, while Universal simply counts 1–32 around the mouth.
An odontogram (also called a dental chart) is a diagram of all teeth on which dental professionals mark each tooth's condition — caries, fillings, crowns, implants, missing teeth — and planned treatments. It's the visual backbone of dental records and treatment plans.
A full adult dentition has 32 permanent teeth — 8 per quadrant: two incisors, one canine, two premolars, and three molars (including the wisdom tooth). Many adults have 28 after wisdom-tooth removal.
This chart is a small taste of the DentClosers odontogram. In the full product, your team diagnoses on it, builds multi-option priced treatment plans from it, and sends patients a translated plan page they can accept online.
See the treatment plan builderWe use analytics cookies to improve this site. Cookie Policy