Abstract
The maxillae, by forming the upper jaw and by bounding portions of the oral, nasal, and orbital cavities, constitute a large part of the face. They articulate with all the other bones of the face, except the mandible, with the frontal, ethmoid and occasionally with either or both, the orbital surfaces and lateral pterygoid plates of the sphenoid. Since I am not dealing with congenital absence or nonunion of parts, I shall forego any embryologic discussion of the maxillae. From the dental point of view, the normal complete maxillary structure should have sixteen fully developed teeth, each occluding in the most efficient manner with its opponents. There is no fixed size for a normal dental arch, nor any definitely determinable curves it should have, but all of its features are dependent on (1) the type of the individual and (2) the most favorable environment for full oral development. As the
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