The maxilla is a bone which helps to make up the skull. It is specifically located in the mid face, forms the upper jaw, separates the nasal and oral cavities, and contains the maxillary sinuses ...

Maxillary sinus: anatomy, physiology, surgery, and bone grafting related to implantology-Eleven years of surgical experience (1979-1990). J Oral Implantol 1990; 16 : 199–209. PubMed Google Scholar ...

It is similar in size to a fingernail and this rectangular-shaped bone is near the frontal bone, the maxilla, the ethmoid, and the inferior nasal concha.