The incisal ridge anatomy is rather unique compared to the upper canine. The distal cusp ridge is longer compared to the mesial side, so the cusp tip is located more mesially. It is very easy to get this structure be displaced within the plane. So it is very important that your depth grooves are very accurate to prevent any structures to get lost or being shifted to other places.

Step by Step

Step 1: Placing Depth Grooves

Placing the depth groove is very critical as you want to mark the original location of each anatomy. In this case, the cusp tip should be placed with a very accurate depth groove. First check the highest tip of cusp. Then one groove on the mesial cusp ridge and the distal cusp ridge. The angle of the bur is parallel to the occlusal plane.

Step 2: Connecting Depth Grooves

Still maintaining the angulation of the bur, connect two grooves, creating one plane at a time.