How Periodontal Disease is Diagnosed
Periodontal disease is diagnosed by your dentist or dental hygienist during a periodontal examination. This type of exam should always be part of your regular dental check-up.
A periodontal probe (small dental instrument) is gently used to measure the sulcus (pocket or space) between the tooth and the gums. The depth of a healthy sulcus measures three millimeters or less and does not bleed. The periodontal probe helps indicate if pockets are deeper than three millimeters. As periodontal disease progresses, the pockets usually get deeper.
Stages of Periodontal Disease
Your dentist or hygienist will use pocket depths, amount of bleeding, inflammation, tooth mobility, etc., to make a diagnosis that will fall into a category below:
Gingivitis
Gingivitis is the first stage of periodontal disease. Plaque and its toxin by-products irritate the gums, making them tender, inflamed, and likely to bleed.
1
Periodontitis
Plaque hardens into calculus (tartar). As calculus and plaque continue to build up, the gums begin to recede from the teeth. Deeper pockets form between the gums and teeth and become filled with bacteria and pus. The gums become very irritated, inflamed, and bleed easily. Slight to moderate bone loss may be present.
2
Advanced Periodontitis
The teeth lose more support as the gums, bone, and periodontal ligament continue to be destroyed. Unless treated, the affected teeth will become very loose and may be lost. Generalized moderate to severe bone loss may be present.
3
Frequently Asked Questions
Q.
How is periodontal (gum) disease diagnosed?
A.
Your dentist or hygienist performs a periodontal examination during your regular dental check-up. Using a small dental probe, they measure the space between your gums and teeth (pocket depths), check for bleeding and inflammation, assess tooth mobility, and may review dental X-rays to detect bone loss — all of which help determine your gum health.
Q.
What do pocket depth measurements tell me?
A.
Periodontal pocket measurements indicate gum health. A healthy sulcus is usually 1–3 mm deep and doesn’t bleed. Deeper pockets often signal gum disease because harmful bacteria and plaque build up in those spaces, allowing infection to progress.
Q.
Why are X-rays used in diagnosing gum disease?
A.
Dental X-rays help your dentist see beneath the gum line and evaluate the level of bone supporting your teeth. This information is essential for diagnosing periodontitis and determining how much bone loss — if any — has occurred.
Q.
What signs during the exam indicate gum disease?
A.
Signs may include increased pocket depths, bleeding during probing, gum inflammation or recession, loose teeth, and changes in bite or gum appearance. These findings help categorize whether you have gingivitis, periodontitis, or advanced periodontal disease.
Q.
Should I get a periodontal exam if I have no symptoms?
A.
Yes. Gum disease can develop silently without obvious symptoms like pain. Early detection through periodontal probing and evaluation helps prevent progression to bone loss and tooth instability. Regular periodontal exams should be part of your dental check-ups.
