DR ARMEN TARANYAN / SCIENCE PHOTO LIBRARY DR ARMEN TARANYAN / SCIENCE PHOTO LIBRARY
Dental abscess. Close-up of the mouth of a patient with a dental abscess (red, centre-left), showing the swollen tissue. A dental abscess is a painful pus-filled swelling caused by a bacterial infection around the root of a tooth. Here, a drain, (white, lower centre) has been inserted to drain the pus from the abscess. Abscesses may be treated with antibiotics, but may require root canal treatment or tooth extraction.
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