Descriptive Anatomy of the Human Teeth

Descriptive Anatomy of the Human 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. 1902 edition. Excerpt: ...pit. F1o. 72 (Par. 94).--R101-1r UPPER THIRD MoLAR, BucCm. SunmCz. The roots are not quite complete, and show the funnel-shaped openings at the apex. factorily made out. Many examples of the three-cusped teeth show much relative diminution of the disto-buccal lobe. 92. The upper third molar is the smallest of the molars, and is more irregular in its size and conformation than the first or second molar. On account of the small size of the disto-lingual lobe, the distal portion of the tooth is much smaller than the mesial, and in the three-cusped teeth the crown becomes triangular, with its angles well rounded. (Fig. 70.) ' 93. The mesial surface resembles that in the upper first and second molars, but is more rounded, so that a concave portion is less frequent, and the distal surface is well rounded. The lingual and buccal surfaces are more rounded than the same surfaces in the other upper molars. The gingival line is usually horizontal in its course around the neck of the tooth, except that, in a few examples, there is a slight curvature on the mesial surface. Many upper third molars are much flattened from mesial to distal. These generally have a considerable concavity on the mesial surface. Occasionally teeth are found that are also abnormally small and have the appearance of supernumeraries. More rarely this tooth fails to develop, and is wanting entirely. 94. The root of the upper third molar has, in the more regular forms, the three divisions common to the upper molars, though relatively smaller and not so widely separated as those of the first and second molars; and often end in slender conical points; many have but a single root; but in most of these the three roots are outlined by grooves of more or less depth. A more

Product details

  • Paperback | 40 pages
  • 189 x 246 x 2mm | 91g
  • United States
  • English
  • black & white illustrations
  • 1236772687
  • 9781236772688