Polarized light micrograph of a horizontal unstained section through the roots of 4 teeth. The dumb bell-shaped columns of dentin have a central core known as the pulp cavity where nerves and blood vessels are found. Dentin is a hard calcified material similar to bone. The dentinal roots are supported by the surrounding zone of collagen-rich periodontal ligament. This anchors the tooth in the bony jaw sockets and serves to resist forces placed upon the tooth while allowing for limited movement during development and in orthodontic procedures. Magnification x4 when printed at 10 cm.
June 29th, 2016
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