BONES OP THE FACE. 197 



ing in contact upon the median line. It is divided into 

 body and processes. The body presents five surfaces for 

 examination. 1, the anterior or facial ; 2, the internal or 



A FIG. 44. 



nasal; 3, the superior or orbital; 4 ; the inferior or palatine ; 

 5, the posterior or zygomatic. 



The anterior surface is concave, and called the canirie 

 fossa. At the upper part of this fossa is the infra-orbital 

 foramen, for transmitting the infraorbital vessels and 

 nerve. From the upper and inner part of this fossa the 

 nasal process of the superior maxilla arises. It ascends 

 and forms the side of the nose. Its superior edge is ser- 

 rated and articulates with the frontal bone. Its anterior 

 edge is smooth and unites with the nasal bone and the 



FIG. 44, A represents an outer view of the superior maxilla of the left side, 

 a Orbitar process. 6 Infra-orbitar canal, c Situation of the os-unguis. d 

 Superior portion of lachrymal canal, e Articulating surface for frontal bone. 

 / Articulating portion with nasal bone, g Anterior part of the floor of the 

 nostril, 'h Point of articulation with its fellow, i Alveolar process, j Canine 

 fossa, fc Articulating surface for the malar bone. 



FIG. 44, B represents an inner view of the superior maxilla of the left side. 

 a Maxillary sinus or Antrum of Highmore. 6 Ductus ad nasum. c Articular 

 point for the frontal bone, d Articular edge for the nasal bone, e Surface 

 for the nasal cartilage. / Anterior point of the floor of the nostril, g Artic- 

 ulating surface for the bone of the right side, h Foramen incisivum. i Pala- 

 tine process, j Articulating edge for the palate bone, fe Anterior articulating 

 ridge for inferior turbinated bone. I Articular surface for the palate bone 

 behind, m Surface for the nasal portion of the palate bone, n Surface for 

 the orbitar plate of the palate bone, o Termination of nasal duct. 



