Land increased strength of the upper jaw depending on the structure of bone tissue related to its formation in phylogenesis. Strong space correspond to points of ossification, the weak – the intermediate lines. Plots of reduced strength are placed along the joints connecting it with the other bones of the facial skeleton and the bones forming the base of the skull. These sites often pass through neognestrelnogo fracture of the upper jaw. This may explain the fact (along with other factors – venue traumatic force, its direction relative to the buttresses), which is most often a fracture line is not strictly within the anatomical boundaries of the upper jaw, but extends to the neighbor, the associated bone.

The upper jaw bone of steam, is connected with the zygomatic, frontal, nasal, Lattice, sphenoid, lacrimal bone. In her distinguished body and four sprouts: frontal, alveolar, palatal and zygomatic. In the body of the upper jaw is aeriferous maxillary sinus, the walls of which are represented by thin lamellae of the compact substance. There are four body surface of the upper jaw: the front, infratemporal, orbital, nasal.  The front surface, fades anterior, limited infraorbital edge (top), skuloalveolyarnym crest and the zygomatic process (laterally), alveolar bone (below), the nasal notch (medial).