Try it out

 

Here's you chance to have a go at measuring an Overjet using the IOTN ruler.

Rules are:

  1. Click on "Your go" and....
  2. Position the mouse cursor over the ruler, press and hold the left mouse button.
  3. Drag the ruler across to the study model.
  4. Place the left hand side of the ruler against the labial surface of the lower incisor and record the reading in the IOTN ruler by looking at the position of the upper incisor tip!

Your go