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PART I.

CHAPTER I.

SECTION I.

ANATOMY OF THE MAXILLARY BONES.

The Jaw Bones, technically termed the Maxillary, consist
of four bones, to of which form the upper and two the
under jaw, usually termed Maxillaria Inferiora and Su-
periora.

Upper Jaw.
Maxillaria superiora, or upper jaw, consists of two bones
situated on the inferior and anterior surface of an irregular
pile of bones which with the maxillaria superiora, constitute
the bones of the face. The superior face of these bones is
formed by a thin triangular plate which is the floor of the
orbit. In the posterior part of this plate is a groove leading
to a canal terminating in the front of the bone at the foramen
infra orbitarium. This foramen is situated just below the
middle of the lower margin of the orbit, and gives passage
to the superior maxillary nerve and an artery. Externally
the triangular plate is terminated by a rough surface, the
malar process v hich articulates with the malar bone.
The nasal process arises by a thick strong root, from this
front upper part of the bone at its upper side. Its front edge
is thin, the posterior margin is thicker, and the upper edge is