JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY
Healthy teeth. Dental X-ray of the healthy molar teeth of a child, seen in the upper and lower jaw. The forked roots buried deep in the upper jawbone can be clearly seen (at top). In the centre of each tooth is the dark pulp which contains blood vessels and nerves. On the flattened biting surfaces of the teeth (at centre) is an extremely hard white enamel layer. The molar teeth, of which there are three on each side of the upper and lower jaw, help to grind up food. A dental X-ray provides information that helps to diagnose the state of health of the teeth, gums and jawbones.
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