What Do Periodontal Pocket Numbers Mean?

Dentist examining periodontal pockets in Seattle, WA

Periodontal pocket numbers measure, in millimeters, the depth of the space between the edge of your gum tissue and the point where it attaches around each tooth. These measurements help your dental team evaluate your gum health and determine whether you could benefit from specialized periodontal services.

Located in Seattle, WA, Pacific Northwest Periodontics provides care for gum disease and other dental conditions. The team includes Dr. Darrin Rapoport and Dr. Riccardo Di Gianfilippo, who are both board-certified periodontists. Dr. Rapoport completed three years of specialized periodontal and implant training at the University of Washington, while Dr. Di Gianfilippo earned a Master of Science in Periodontics from the University of Michigan.

How Are Periodontal Pockets Measured?

During a periodontal exam, your dental professional gently places a small instrument called a periodontal probe between each tooth and the nearby gum tissue. The markings on the probe show how deep the space is.

Several areas around each tooth are typically checked because one side may have a different reading from the other. You might hear a series of numbers as the measurements are recorded in your periodontal chart.

The exam also considers bleeding, gum recession, tooth movement, plaque buildup, and changes in the bone supporting your teeth. One pocket number doesn’t provide the full picture.

What Do the Different Numbers Indicate?

Pocket measurements are interpreted alongside your complete oral health evaluation, but the following ranges can provide a general idea of what the numbers mean:

  • 1 to 3 millimeters: These readings are commonly found around healthy gums, particularly when there’s no bleeding, inflammation, or attachment loss.
  • 4 millimeters: This reading might indicate inflammation or an area that warrants closer evaluation. Its meaning depends on bleeding, gum recession, attachment levels, and changes over time.
  • 5 to 6 millimeters: Pockets at this depth can be difficult to clean thoroughly with brushing and flossing alone. They are often associated with periodontitis and the loss of the tissues that support the teeth.
  • 7 millimeters or deeper: These readings can occur with advanced periodontal tissue damage and may be accompanied by substantial attachment or bone loss.

A deeper number doesn’t automatically determine your diagnosis. Your periodontist will also consider how many areas are affected, whether the gums bleed, and what dental X-rays show.

Why Do Pocket Measurements Change?

Readings can increase when plaque and tartar trigger inflammation. As gum disease progresses, the tissue might pull away from the tooth, creating a deeper space where additional bacteria can collect.

Numbers can also improve after periodontal treatment. Removing buildup beneath the gumline and controlling inflammation may allow the tissue to fit more closely around the teeth. Regular measurements help us compare your current gum health with earlier visits.

What Happens When Deeper Pockets Are Found?

Your care will depend on the depth and location of the pockets, the extent of bone loss, and how your gums respond to treatment. Recommendations may include more frequent periodontal maintenance, scaling and root planing, or another form of periodontal care.

Schedule an Exam Today

Knowing your pocket numbers gives you useful information about areas that need extra attention. For a detailed periodontal evaluation in Seattle, WA, contact us at Pacific Northwest Periodontics. You can reach Dr. Rapoport and Dr. Di Gianfilippo’s office at (206) 575-1086.

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411 Strander Blvd,
Suite 302
Seattle, WA 98188

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