In a perio chart the clinician measures the pocket depth at six sites around each tooth with a probe and records the reading in millimeters. Readings of 1 to 3 mm are generally considered healthy; deeper pockets, bleeding on probing and recession indicate disease. Clinical attachment loss is calculated from pocket depth and recession.
Because a full chart means up to 192 readings, entry speed matters. Software offers keyboard entry, voice-activated charting and, more recently, AI that fills the chart from spoken numbers.
From our data: 20 of 47 practice management systems with documented features confirm voice perio charting.
What is recorded at each visit
A periodontal chart records six measurements per tooth, three on the cheek side and three on the tongue side, so a full mouth has up to 192 readings. For each site the clinician notes the probing depth and whether the site bleeds on probing, plus recession, mobility and furcation involvement on multi-rooted teeth.
| Measurement | What it tells you | Typical notation |
|---|---|---|
| Probing depth | The depth of the gum pocket in millimeters | 1 to 3 mm is generally healthy; 4 mm or more needs attention |
| Bleeding on probing | Active inflammation at the site | A dot or mark at the site |
| Recession | How far the gum margin has moved down the root | Millimeters from the cement-enamel junction |
| Clinical attachment loss | Total support lost: probing depth plus recession | Calculated by the software |
| Furcation | Bone loss between the roots of a molar | Class I to III |
| Mobility | How much the tooth moves | Class 0 to III |
Thresholds are clinical guidance, not rules. The treating clinician decides what a reading means for a patient.
Staging and grading
The 2017 classification of periodontal disease describes each patient with a stage (I to IV, based on severity and complexity) and a grade (A to C, the likely rate of progression). Software that supports the classification stores both, so a chart can show how a case changes between visits.
Speed is the real problem
Charting 192 sites with a probe and a keyboard is slow, which is why many hygienists do it in a rush or skip it. Options include keyboard shortcuts, a foot pedal, voice-activated entry in which the hygienist says the numbers, and AI tools that listen to the dictation and fill the chart. Some systems also accept readings from computerized probes.
Whichever you choose, test it on a real patient with a loud suction running and check how corrections are handled. A tool that makes mistakes costs more time than it saves.
Perio charting and billing
Scaling and root planing and periodontal maintenance are coded by quadrant and by the number of teeth treated, and most plans ask for pocket depths and radiographic bone loss in the record as evidence. A complete perio chart is therefore also part of what supports the claim.
Go deeper
FAQ
What is a normal pocket depth?
Depths of 1 to 3 millimeters with no bleeding are generally considered healthy. Deeper pockets, especially with bleeding, suggest gum disease, but the diagnosis depends on the whole picture.
What is clinical attachment loss?
The total amount of periodontal support lost around a tooth, measured from the cement-enamel junction to the bottom of the pocket. In software it is calculated as probing depth plus recession.
How often should a perio chart be updated?
Practices commonly record a full chart at the comprehensive exam and update it at periodontal maintenance and at recall visits, following the clinician’s protocol and the patient’s risk.
Does voice perio charting work?
It can save time, and several practice management and AI tools offer it. Accuracy depends on speech recognition in a noisy room and how easily you can correct an entry, so trial it with your own staff.