ST BARTHOLOMEW HOSPITAL / SCIENCE PHOTO LIBRARY ST BARTHOLOMEW HOSPITAL / SCIENCE PHOTO LIBRARY
Bleeding in gum disease. Close-up of the mouth of a person with bleeding caused by gum disease (gingivitis). Gum disease is most often caused by inadequate dental hygiene, allowing bacteria to build up between the teeth and below the gumline. This leads to chronic inflammation and gradual recession of the gums. In severe cases the underlying bone can be eroded leading to loosened teeth and ultimately tooth loss.
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