How to use this odontogram
An odontogram is a chart of the teeth on which a dentist records what each tooth has: decay, fillings, crowns, missing teeth and other findings. This one works in your browser and gives you a clean PDF when you are done.
What you can chart
Select a button in the palette, then click the chart. Each button places its mark in one of five ways:
- On a surface: caries and restorations go on a square of the tooth's surface diagram.
- On a tooth: most conditions, such as a crown, a fracture or a missing tooth, go on the tooth itself.
- Between two teeth: a diastema or a supernumerary tooth goes in the gap between the two teeth.
- Across a range: a fixed orthodontic appliance or a fixed partial denture needs the first and the last tooth; a transposition needs the two adjacent teeth that have changed places.
- On several teeth: dentures, edentulism, removable orthodontics and fusion are marked on each tooth involved.
Reading the chart
The chart uses the symbols of the MINSA odontogram standard (NTS 045-2006).
Red and blue
Red marks a lesion or something temporary: caries, a fracture, a temporary crown or a root remnant. Blue marks a treatment in good condition, such as a restoration, a crown or an implant, and any other finding, such as a missing, rotated or erupting tooth.
Tooth numbers (FDI notation)
Each tooth has two digits: the first is the quadrant and the second the tooth, counted from the midline. The chart is drawn as if you are facing the patient, so the patient's right side is on your left.
- 1 and 2: upper right and upper left permanent teeth (11–18, 21–28).
- 3 and 4: lower left and lower right permanent teeth (31–38, 41–48).
- 5 to 8: the same four quadrants for primary teeth (51–55 to 81–85), shown on the Child chart.
Good to know
Private by design
Nothing you enter is uploaded or stored. The chart and the patient details live only in this browser tab, so download the PDF before you close it.
Abbreviations and corrections
Click the box above or below a tooth to type an abbreviation of up to three letters. Click a mark again, or right-click it, to remove it; Ctrl+Z undoes the last change.