Hooper, Robert [Hrsg.]: The Anatomist's Vade-Mecum: Containing The Anatomy, Physiology, Morbid Appearances, &c. Of The Human Body ; The Art of making Anatomical Preparations, &c. To which are added Anatomical, Physiological, Medical, And Surgical Examinations For Students (London, 1811)

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cavity, by ligaments arising from their edges, and the whole
is surrounded by a capsular ligament, fixed to the temporal
bone and the neck of the condyle. By the peculiar forma-
tion of this joint, the lower jaw has many motions ; thus, when
the condyles slide forwards, the lower jaw passes horizontally
forwards, as in the action of biting ; or the condyles only may
be brought forwards, while the rest of the jaw passes back-
wards, as is the case when the mouth is open. The condyles
may also slide alternately backwards and forwards, and vice
vers/1, so that while one condyle advances, the other moves
backwards, turning the body of the jaw from side to side, as
in grinding the teeth. The principal use of ihe interarticular
cartilages, seems to be that of securing the articulation, by
adapting themselves to the different inequalities in these se-
veral motions of the jaws, and to prevent any injuries from
friction.

The lower jaw, at birth, consists of two pieces, which
meet at the symphysis.

Besides the usual diseases of bones, the author has seen
one case of necrosis of this bone, in which the whole
of the lower jaw came away at four different times;
and another, where one half came away at one time.
The former was under a long-continued salivation ;
the latter from an abscess destroying the nutritious
artery. Their loss was supplied by a very firm body
of Lone.