Cavity below gum line
A cavity at or below the gum line can affect exposed root dentine and may need gum assessment, filling, root treatment, or extraction.
What can a cavity below the gum line affect?
A cavity at or below the gum line can affect exposed root dentine and may need gum assessment, filling, root treatment, or extraction.
Why can a receding gum expose vulnerable tooth surfaces?
The crown is protected by enamel, but a receding gum can expose cementum and dentine on the root. These softer surfaces can decay near the gum margin, where moisture, plaque, and access can make the lesion difficult to see.
How can you care for a cavity below the gum line?
Keep the gum margin clean with a soft brush and fluoride toothpaste, and clean between the teeth without snapping the floss into the gum. Limit frequent sugary or acidic drinks and arrange an examination rather than trying to scrape the area.
When should a cavity near the gum be examined?
Book care for a rough notch, brown or black area, sensitivity, food trapping, or pain near the gum. Swelling, spontaneous pain, or a draining spot can indicate pulp or root infection and needs prompt assessment.
What could a defect below the gum line represent?
Ask whether the defect is decay, abrasion, abfraction, or exposed root surface, and how deep it extends. Discuss fluoride treatment, a bonded filling, gum treatment, root canal treatment, or removal if those options are relevant.
Frequently asked questions
Can a root cavity be filled?
Often it can, if enough sound tooth remains and the site can be isolated and cleaned during treatment.
Can a cavity below the gum heal by itself?
A formed cavity does not rebuild like intact enamel; early mineral loss may be managed differently from a cavitated lesion.
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Who wrote this page
This library is published by Dental Nation, a licensed dental group practising in the United Arab Emirates. Pages are written and overseen by the same clinical team that treats patients in our clinics, and are held to a fixed editorial standard for safety and accuracy.
This page is patient education, not medical advice, and cannot replace an examination. Anything urgent — facial swelling, trauma, uncontrolled bleeding or severe pain — needs a dentist or emergency care now.