Page 773 - My FlipBook

''JUMPING THE BITEr 111

bicuspid closes beliind the upper second instead of in front of it, which
is the normal articulation. Fig. 774 shows such a case of disto-
lingual occlusion.
Fig. 773.

Wire ligatures with the bow, for various movements of the teeth.

If the lower jaw can be moved forward the width of a bicuspid, or
less, sometimes, the normal occlusion will be produced. This move-
ment is termed "jumping the bite," and originated with Dr. N. W.
Kingsley more than twenty years ago.
The lower jaw may be voluntarily moved forward but not backward.
Any patient v/ith an abnormal occlusion can move the lower jaw for-
¥m.

Disto-lingual occlusion.
ward the width of a tooth and thus occlude normally. If this can be
made a permanent habit, the patient will have "jumped the bite."
Unless some change takes place in the glenoid cavity, such as a filling
up of its posterior portion, or in the condyle, such as the bending of the
neck, as suggested by Dr. Case, or in the angle of the jaw itself, so as
to ])revent the jaw from moving back into its old position, the new
position cannot be maintained.
The first recorded operation of this kind was described as follows