Glasgow Medical Journal Volume 6

Glasgow Medical Journal Volume 6

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1874 edition. Excerpt: ...III.--CONGENITAL SJIALLNESS OF TUB LOWER JAW. The cases of this on record are more numerous than those of the deformities already discussed, and they have received a larger share of attention, although the views held by the various authors regarding their causation have been unsatisfactory, and even contradictory. Before passing on to consider more closely the forms in which congenital smallness has been met with, it will be well, as a help towards a better understanding of them, to bear in mind the knowledge we possess regarding the normal development of the inferior maxilla. More light has boon Vrolik, Op. Cit. Tab. Ixi. Fig. C. thrown on this by Hiiter than by any other recent author. He has shown that there is little increase of size, between birth and adult development, in the portion bearing the incisor and canine teeth, while the segment bearing the bicuspids and molars is enormously developed in proportion to the rest of the jaw during the like period of time, and this fact has to be kept in mind in the study of congenital smallness, as it is of consequence to observe what relation the jaw bears in each to the number and size of the teeth. Hiiter is of opinion that the increase in the number of the molar teeth at the second dentition, is the cause of the increased growth of the molar segment; while the incisor segment, having always the same number of teeth, does not grow in the same ratio. The ingenuity with which he supports his conclusions does not however blind us to the fact, that the lower border of the molar segment, though not influenced by the teeth in any way, grows equally with the upper border, and that the influence of the teeth, if acknowledged as a sufficient cause, would lead us to expect an increased obtuseness of more

Product details

  • Paperback | 224 pages
  • 189 x 246 x 12mm | 408g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236661257
  • 9781236661258