A system of dental surgery / by John Tomes and Charles S. Tomes.

  • Tomes, John, 1815-1895.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: A system of dental surgery / by John Tomes and Charles S. Tomes. Source: Wellcome Collection.

    17/776 (page 5)
    maxilla are marked on their floors by a slight groove, in which the inferior dental nerve and artery lie. The very close approximation of the nerve to the developing teeth may serve in some measure to explain the liability of children to reflex nervous disturbances dependent on the teeth. The nerve and artery enter the alveolus on either side through an aperture in the base of the septum, which divides imperfectly the first from the second temporary molar, and pass out to the external surface of the jaw through an orifice in the septum dividing the canine from the former tooth. Posterior to the alveoli for the first temporary molars we have a large open socket, which, in the upper maxilla, has but a very imperfect posterior wall. Projecting inwards from the free edge of the outer and inner alveolar walls, we may observe small spicula, the rudiments of sei)ta which are destined to divide the cavity into two distinct sockets, and thus separate the pulps of the second temporary and first permanent molar teeth, both of which at present occupy one large alveolus. The division usually takes place a little earlier in the lower than the upper jaw. The groove which marks the passage of the nerve and artery in the floor of the socket of the first temporary molar, is continued through the alveoli of the two posterior teeth, having entered the jaw by the inferior dental foramen, which is situated midway between the angle of the jaw and the edge of the inner wall of the alveolus of the first permanent molar, a little below the floor of the posterior part of the last alveolus. At this period the articular process of the lower jaw is scarcely raised above the level of the alveolar edge, while the angle is projected downwards a little below the general level of the inferior margin of the jaw. The coronoid process rises at an angle of forty-five degrees from the alveolar edge, its ascent commencing at the anterior boundary of the socket of the first permanent molar. In the upper jaw the zygo- matic process proceeds outwards from the anterior margin of the large open socket of the second temporary molar.