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The maxillary bones on each side join in the middle at the intermaxillary suture, a fused line that is created by the union of the right and left âhalvesâ of the maxilla bone, thus running down the middle of the upper jaw.axilla. The maxilla forms the upper jaw by fusing together two irregularly-shaped bones along the median palatine suture, located at the midline of the roof of the mouth.
Home > Skeletal System > Bones of the Head and Neck > Maxilla. The maxilla consists of maxillary bones that form the upper jaw; together they are the keystone of the face, for all other immovable facial bones are connected to them. Portions of these bones make up the front of the roof of the mouth (hard palate), the floors of the orbits, and the sides and floor of the nasal cavity. They also contain the sockets of the upper teeth. Inside the maxillae, on the sides the nasal cavity, are the maxillary sinuses (antrum of Highmore). These air-filled spaces are the largest of the sinuses, and they extend from the floor of the orbits to the roots of the upper teeth.