HISTOLOGY  . If a See also:

• SECTION
• SECTION (Lat. sectio, cutting, secare, to cut)

section he made vertically through a tooth all the exposed See also:

• PART

part or See also:

• CROWN

crown is seen to be covered with See also:

• ENAMEL (formerly " amel," derived through the Fr. amail, emmll, esmail, from a Latin word smaltum, first found in a 9th-century life of Leo IV.)

enamel, which, microscopically, is composed of a number of See also:

• FINE

fine hexagonal prisms arranged at right angles to the See also:

• SURFACE

surface of the tooth, and formed chiefly of See also:

• BONE (a word common in various forms to Teutonic languages, in many of which it is confined to the shank of the leg, as in the German Bein)
• BONE, HENRY (1755-1834)

Bone See also:

• CEMENT (from Lat. caementum, rough pieces of stone, a shortened form of caedimentum, from caedere, to cut)

Cement or Alveolar periosteum crustapetrosa or See also:

• ROOT (late O.E. rot, adopted from Scand., cf. Norw. and Swed. rot, Dan. rod; the true O.E. word was wyrt, plant, represented in Ger. Wurz or Wurzel; the ultimate root is the same in both words, and is seen in Lat. radix)
• ROOT, ELIHU (1845– )

root-membrane From See also:

• AMBROSE (AMBROISE), AUTPERT (d.' 778)
• AMBROSE (ANDREY SERTIS-KAMENSKIY) (1708-1771)
• AMBROSE (fl. 119o)
• AMBROSE, ISAAC (1604-1663/4)
• AMBROSE, SAINT (c. 340-307)

Ambrose See also:

• BIRMINGHAM

Birmingham, in See also:

• CUNNINGHAM, ALEXANDER (c.1655-173o)
• CUNNINGHAM, ALLAN (1784-1842)
• CUNNINGHAM, WILLIAM (1805-1861)

Cunningham's See also:

• TEXT (Lat. textum, woven fabric, from texere, to weave)

Text-See also:

• BOOK

Book of See also:

• ANATOMY
• ANATOMY (Gr. avaroyil, from ava-silo c', to cut up)

Anatomy . its various parts, and its structure . See also:

• CALCIUM [symbol Ca, atomic weight 40.0 (o= x6)]

calcium phosphate with small amounts of calcium carbonate, See also:

• MAGNESIUM [symbol Mg, atomic weight 24.32 (0 = 16)]

magnesium phosphate and calcium fluoride, but containing practically no organic See also:

• MATTER

matter . The enamel rests on the " dentine," of which hard yet elastic substance by far the greater part of the tooth is composed . It is made of the same salts as the enamel, but contains in addition a See also:

• GOOD, JOHN MASON (1764-1827)

good See also:

• DEAL

deal of organic matter and forms a structureless See also:

• MASS (O.E. maesse; Fr. messe; Ger. Messe; Ital. messa; from eccl. Lat. missa)
• MASS, IN

mass through which the fine " dentinal tubes " run from the pulp cavity to the periphery . Surrounded by the dentine is the " pulp cavity," which is filled by the tooth pulp, a highly vascular and See also:

• NERVOUS

nervous mass of branched connective See also:

• TISSUE (Fr. tissu, tissue, participle of tisser, Lat. texere, to weave)

tissue cells, which, in a See also:

• YOUNG
• YOUNG, A
• YOUNG, ARTHUR (1741-1820)
• YOUNG, BRIGHAM (1801-1877)
• YOUNG, CHARLES MAYNE (1777–1856)
• YOUNG, EDWARD (1683–1765)
• YOUNG, JAMES (1811-1883)
• YOUNG, THOMAS (1773-1829)

young tooth, has a layer of See also:

• EPITHELIAL, ENDOTHELIAL

epithelial cells, the " odontoblasts, " lying See also:

• CLOSE
• CLOSE (from Lat. clausum, shut)
• CLOSE, MAXWELL HENRY (1822-1903)

close against the See also:

• WALL (O. Eng. weal, weall, Mid. Eng. wal, wane, adapted from Lat. vallum, rampart; the original O. Eng. word for a wall was wag or tenth)
• WALL, RICHARD (1694-1778)

wall of the cavity and forming new dentine . Slender processes (" Tomes's fibrils ") project from these cells into the dentinal tubes, and are probably sensory . A See also:

• NERVE (Lat. nervus, Gr. vevpov, a bowstring)

nerve and artery enter the See also:

• APEX

apex of the root of the tooth, but it is not understood how the nerve ends . Surrounding the dentine where it is not covered by enamel is the " cement " or " crusta petrosa," a thin layer of bone which is only separated from the bony socket by the alveolar periosteum .