A layer of tough, yellowish, bone-like tissue that covers the root of a tooth. It helps hold the tooth in the socket. The cementum contains the periodontal ligament that attaches the tooth to the bone.
Dentin
The
hard but porous tissue located under both the enamel and cementum of
the tooth. Dentin is harder than bone.
Enamel
The tough, shiny, white outer surface of the tooth that is visible.
It holds the tooth in place. Enamel is the hardest substance in the
body.
Pulp
(Nerve)
The
soft center of the tooth. The pulp contains blood vessels and nerves;
it nourishes the dentin.
Gingiva
(Gums)
The firm pink flesh inside the mouth. It covers the bones and
surrounds the teeth.
Bone
The
alveolar bone. It forms the tooth socket and provides the tooth with
support.
Periodontal
Ligament
The fleshy tissue between the tooth and the tooth socket.
It holds the tooth in place.