Anatomy of a Tooth
The hardest, white outer part of the tooth. Enamel is mostly made of calcium phosphate. Enamel is the hardest substance in the body.
A Porous layer underneath the enamel. Dentin is made of living cells, which secrete a hard mineral substance. Dentin is similar to but harder than bone.
The softer, living inner structure of teeth. Blood vessels and nerves run through the pulp of the teeth. The pulp nourishes the dentin.
A layer of connective tissue that covers the root of the tooth. The cementum attaches the tooth to the bone by attaching to the periodontal ligament.
A fibrous tissue that helps hold the teeth tightly within the jaw by attaching to the cementum.