On the origin and development of the pulps and sacs of the human teeth / by John Goodsir.

Date:
[1839?]
Catalogue details

Licence: Public Domain Mark

Credit: On the origin and development of the pulps and sacs of the human teeth / by John Goodsir. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    9/38 (page 9)
    tlie upper lip had become closely attached to, and continuous with, the median lobule. The outlines of the horse-shoe lobe were still perceptible, and on its external side the lobule, all along marked (;•,) was visible. The outer lip of the dental groove, or the external alveolar process, was equally developed all around. The upper lip was still much retracted. There were ten papillae, inclosed in open-mouthed follicles, and ranged at nearly equal dis- tances all around the dental groove. * The four anterior papillae were flattened from before backwards with a straight edge, and were somewhat similar to the future incisive teeth. The next one on each side was a simple cone. The two posterior on each side were also conical, but flattened transversely, so as considerably to resemble carnivorous molars. Each of these papillae adhered by its base to the fundus, while its apex, as during the eleventh and twelfth weeks, presented itself at, or, as in the present instance, pro- truded from, the mouth of its follicle. The point of the needle could be introduced through the mouth, so as to move the papilla about in the interior of the follicle. By removing the outer lip of the dental groove, and the outer wall of all the follicles by the scis- Fig. 14. sors, a good view was obtained of the configuration of these parts (Fig. 14). The follicles were observed to be mere duplications of the mem- brane of the groove, and consequently of the general gastro-in- testinal mucous membrane. The inner surface of the follicles was of a greyish-yellow colour. The papillae had increased rela- tively so as to protrude from the mouths of their follicles. They were granular, friable, and ef-a dead-white -coIoup. Lower Jaw.—No remarkable change had taken plaee in the lower jaw, except in the relative enlargement of the papillae, and in the distinct developement of the follicle of the posterior papilla (5, Fig. 13). The outer lip of the dental groove was not very distinctly marked, but the inner was well developed.—The breadth of the superior arch was 3 lines, and the length was also 3 lines. 8.—\Uh Week.—Upper Jaw.—The median lobule had un- dergone little change, the lateral lobules had become broader from before backwards, apparently in consequence of the retraction of the palate, which, instead of exhibiting on its anterior part the confused transverse wrinkles formerly mentioned, presented on its lateral divisions, (coiTcsponding to the horse-shoe lobe,) four or five parallel rugae, which were apparently remains of the wrinkles. The • Arnold, Salzburg Med. Chirurg. Zeitung 1831. Erstcr Band, p. 230'. Val- entin, Handbuch dcr Entwickelungs-gesdiiohtc dcs Mcnsclicn, p. 482.