Anatomy and Cell Biology 3309 Lecture Notes - Lecture 15: Periodontal Fiber, Hard Tissue, Apical Foramen
23 Jan 2017
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Document Summary
8 teeth in each quadrant: 2 incisors, 1 canine, 2 premolars, 3 molars. Permanent teeth are preceded by 20 deciduous (baby) teeth there are no deciduous precursors of the 12 permanent molar teeth. Portion of tooth that projects above the gingiva (or gum) One or more roots lie below the gingiva and hold the teeth in bony sockets (alveoli) Enamel and cementum meet at the neck (or cervix) A tissue filled space surrounded by a calcified material called dentin extends to the root canal, i. e. the apex of the root. An orifice that permits entrance and exit of the blood vessels, lymphatics, and nerves of the pulp cavity periodontal ligament. A collagenous, fibrous structure inserted in the cementum that serves to fix the tooth firmly in its bony socket. A calcified tissue similar to bone but harder due to a higher content of calcium salts. Composed mainly of type 1 collagen, glycosaminoglycans and calcium salts (70% of weight)
