Anatomy and Histology of the Mouth and Teeth

Anatomy and Histology of the Mouth and Teeth

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 edition. Excerpt: ...of the superior teeth that the process will not be repeated. ' INFERIOR CENTRAL INCISOR. CALCIFICATION BEGiNS, FIRsT YEAR AFTER BiRTH. CALCHFiCATIION COMPLETED, ABOUT THE TENTH YEAR. ERUPTED, SEVENTH To EIGHTH YEAR. AVFRAGE LENGTH oF CROWN, .34.-AVERAGE LENGTH OF R00r, .47. AVERAGE LENGTH OVER ALL, .81. Like the superior central incisor, this tooth presents for examination four surfaces, a cutting-edge, and various angles, margins, etc. By the union of the labial and lingual surfaces at the cutting-edge the incisive feature is established and the double incline plane common to inI-bi"' cisors produced. The Labial Surface of the Crown (Fig. Io6).--This surface is smooth and convex, its general outline resembling an inverted cone, the base of which is formed by the cutCemga, Cggtgil ting-edge and the apex by the cervical line. The margins of the surface are, with the exception of the cutting-edge, not so well defined as those of the superior central. Near the cuttingedge the mesial and distal margins pass somewhat abruptly into the reFIG m6VINm, OR IWSOR, spective lateral surfaces, but as the RM" 3,"" I-'""L 5"""E-neck of the tooth is approached, they are much rounded. The incisive mar gin is squarely cut, and is nearly at right angles with the long axis of the tooth. The cervical margin is fairly well defined, and is deeply concave in the direction of the root. Except in very Mesial Distal Angle Angle young teeth, this surface is seldom much broken by the labial grooves; but in certain types one or more transverse ridges may be found occupying the cervical third. The mesiodistal diameter at the cutting-edge is about one-third greater than at the cervical line, and, while these more

Product details

  • Paperback | 110 pages
  • 189 x 246 x 6mm | 213g
  • United States
  • English
  • black & white illustrations
  • 1236880242
  • 9781236880246