maxillary antrum

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 [an´trum] (pl. an´tra, antrums) (L.)
a cavity or chamber. adj., adj an´tral.
antrum of Highmore maxillary sinus.
mastoid antrum an air space in the mastoid portion of the temporal bone communicating with the middle ear and the mastoid cells.
antrum maxilla´re (maxillary antrum) maxillary sinus.
pyloric antrum (antrum pylo´ricum) the proximal, expanded portion of the pyloric part of the stomach.
tympanic antrum (antrum tympa´nicum) mastoid antrum.

max·il·lar·y si·nus

the largest of the paranasal sinuses occupying the body of the maxilla, communicating with the middle meatus of the nose.

maxillary sinus

A facial region that is one of a pair of usually symmetrical, hollow cavities located in the maxillary body. It is pyramidal, with the base projecting medially on the nasal cavity and laterally to the apex of the zygoma.

Maxillary sinus anatomy
• Roof—Formed by maxilla’s alveolar process (the roof forms the floor of the orbit).
• Walls (anterior)—Forms part of nasal cavity’s lateral wall, which is the facial surface of the medial maxilla.
• Walls (posterior)—Relates to the infratemporal space and pterygopalatine fossa.

maxillary antrum

The maxillary sinus; a cavity in the maxillary bone communicating with the middle meatus of the nasal cavity.
See also: antrum
References in periodicals archive ?
The operative findings included significant septic secretions within the left middle meatus and gelatinous soft tissue within the left maxillary antrum, which was sent for histological analysis.
Computed tomography (CT) demonstrated a space-occupying process involving and expanding the left maxillary antrum, which contained inhomogenous, low-density, fat-like material (figure).
Gross examination revealed a hard, bony, 5 x 5 x 3-cm mass that involved the maxillary bone and compressed the maxillary antrum.
Computed tomography (CT) of the sinuses demonstrated a completely opacified maxillary antrum with areas of calcification suggestive of fungal sinusitis (figure 2).
This system uses proprietary technology to allow direct, endoscopic visualization of the maxillary sinus ostium and balloon advancement into the ostiomeatal unit (OMU) by accessing the maxillary antrum at the canine fossa through a small hole approximately 3 mm in diameter, as shown in figure 1, A.
Ectopic supernumerary tooth, imbedded in superior wall of left maxillary antrum.
A middle-meatal antrostomy revealed another large quantity of clotted blood in the maxillary antrum, which was also removed endoscopically.