Body of maxilla
Encyclopedia
The body of the maxilla
is somewhat pyramidal in shape, and contains a large cavity, the maxillary sinus
(antrum of Highmore).
Maxilla
The maxilla is a fusion of two bones along the palatal fissure that form the upper jaw. This is similar to the mandible , which is also a fusion of two halves at the mental symphysis. Sometimes The maxilla (plural: maxillae) is a fusion of two bones along the palatal fissure that form the upper...
is somewhat pyramidal in shape, and contains a large cavity, the maxillary sinus
Maxillary sinus
The pyramid shaped maxillary sinus is the largest of the paranasal sinuses, and drains into the nose. It is present at birth as rudimentary air cells, and develops throughout childhood.-General characteristics:...
(antrum of Highmore).
Surfaces
It has four surfaces - an anterior, a posterior or infratemporal, a superior or orbital, and a medial or nasal.- Anterior surface of the body of the maxillaAnterior surface of the body of the maxillaThe anterior surface is directed forward and lateralward. It presents at its lower part a series of eminences corresponding to the positions of the roots of the teeth...
- Posterior or infratemporal surface of the body of the maxillaInfratemporal surface of the body of the maxillaThe infratemporal surface is convex, directed backward and lateralward, and forms part of the infratemporal fossa.It is separated from the anterior surface by the zygomatic process and by a strong ridge, extending upward from the socket of the first molar tooth...
- Superior or orbital surface of the body of the maxillaOrbital surface of the body of the maxillaThe orbital surface is smooth and triangular, and forms the greater part of the floor of the orbit.It is bounded medially by an irregular margin which in front presents a notch, the lacrimal notch; behind this notch the margin articulates with the lacrimal, the lamina papyracea of the ethmoid and...
- Medial or nasal surface of the body of the maxillaNasal surface of the body of the maxillaThe nasal surface presents a large, irregular opening leading into the maxillary sinus. At the upper border of this aperture are some broken air cells, which, in the articulated skull, are closed in by the ethmoid and lacrimal bones....