Dental surgery notes.

  • Dowsett, Ernest B. (Ernest Blair)
Date:
1912
Catalogue details

Licence: In copyright

Credit: Dental surgery notes. Source: Wellcome Collection.

    18/176 page 2
    Mandible Developed principally from Membrane, but partly from Cartilage. Meckel’s Cartilage. A transitory cartilage formed in the first Branchial Arch. It disappears as ossification progresses, but small piece persists as the malleus, except which it has entirely gone by end of jth month. Centres : — 1. “ Dentary ”—on outer surface of .Meckel’s car- tilage, just below future mental foramen.— For body of the bone—5 th week. 2. Splenial ”—in membrane on inner surface. —For inner walls of sockets. 3. Mento-Meckelian ”—for chin. 4. For Condyle. 5. For Coronoid process. 6. For Angle. Condition of Jaws at Birth: 1. Halves of mandible separated by fibro- cartilage, allowing free movement. 2. Alveolar depressions show wide open spaces, from which teeth drop out in dry specimens. 3. At posterior walls of sockets of centrals are shallow depressions for pulps of successors. 4. Condyle on level with alveolar margin. 5. Coronoid process makes angle of 1350 with body of jaw. 6. Inferior dental nerve and artery seen at bottom of sockets of lower molars. 7. Large shallow depression for 1st and 2nd temporal'}? molars in common. 8. Shallow depression extending backwards for xst permanent molar germ.
    digitised image 1
    digitised image 2
    digitised image 3