Congenital malformations of the lower jaw / by Alexander Ogston.

  • Ogston, Alexander, 1844-1929.
Date:
1874
Catalogue details

Licence: Public Domain Mark

Credit: Congenital malformations of the lower jaw / by Alexander Ogston. Source: Wellcome Collection.

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    partly fused together. The dorsal vertebree were twelve in number, but the upper ones were small and oblique. The left ribs were normal in number; the right ribs num¬ bered nine, the upper ones being deficient. 2. Otto ^ describes another case exactly similar, but without the spina bifida. 3. And a third case, t concerning which he simply states, Mandibulm, ut fieri solet, magnse et prominentis synchondrosis abnormem continet nucleum osseum.” It must be admitted that these three cases are far frorn being a convincing proof of the existence of a congenital preponderance of size of the inferior maxilla. In all of them the increase may not have been absolute, but merely relative; the upper jaw may have been unusually small, and thus have given rise to the apparent magnitude of the lower. They are in the original mere sketches without minute details or plates, and although in the first it is expressly remarked that the facial bones were prominent, the suspicion arises that they may have been similar in their nature to the cases of which I now quote two for the sake of com¬ parison, and where diminution of size or alteration of posi¬ tion of the superior maxilla gave to the lower jaw an apparent magnitude which did not really exist. (a,) YrolikJ gives drawings and descriptions of the heads ^ Otto, Op. Cit. Case lix , p. 37. f Otto, Op. Cit. Case lx., p. 37- X Vrolik, Op. Cit. Tab. liii., Fgs. 1 and 2 ; and Tab. liii. Figs 8 and 11. PLATE I. Fig. 1. Apparent increase of size of tbe lower jaw from imperfect develop¬ ment of the upper jaw. (а) Membranous condition of the orbital plate of the frontal bone. (б) Membrane representing the ethmoidal notch of the frontal bone and the deficient ethmoid bone, (c) Malar bone. (rZ) Zygomatic process of the temporal bone. (e) Superior maxillary bones imperfectly developed and fused together. Fig. 2. Apparent increase of size of the lower jaw from imperfect develop¬ ment of the upper jaw. Rudimentary condition of the nasal bones.