Periodontal Probe

Correct way to hold a periodontal probe, modified pen grip.© Lisa Milella 2013

Periodontal probe (14W type) showing graduations of the tip© Lisa Milella 2013

The periodontal probe is a narrow rounded or flat, blunt-ended, graduated instrument. Due to its blunt end, it can be inserted into the gingival sulcus without causing trauma.

The periodontal probe is used to:

• Measure periodontal probing depth
• Determine degree of gingival inflammation by gentle probing
• Measure gingival attachment loss (recession)
• Evaluate furcation lesions
• Evaluate extent of tooth mobility

The markings on the probe are either engraved rings or colour coded bands. A screening probe for example has 3 or 4mm banded block markings whilst a Williams periodontal probe is more accurate with mm markings. Before using the probe, the operator should ensure that they know what the markings represent by comparing the probe to a ruler.