For using the periodontal probe index, it is necessary to use the WHO probe. The steel ball at the distal end of the probe features a diameter of 0.5mm.

The steel ball avoids not only injuries but allows the discovery rough surfaces and edges of dental fillings. The first measurement area of the probe is a black 2mm band, which shows the depth rom 3.5mm up to 5.5mm. 

Usable with BIONIK Handle series. Replaceable tip.