Mindblown: a blog about philosophy.

An opening or orifice. In pollen, any absence of part of the exine. A hole drilled in a corneal contact lens in order to facilitate the exchange of gases underneath the lens. Entrance to a body cavity or channel. An orifice or opening, especially to anatomical or bony spaces or canals.  

An occlusal relationship where opposing teeth are not in contact (i.e., an anterior open bite).  

Calcium phosphate of the composition Ca5(PO4)3OH; one of the mineral constituents of teeth and bones (with CaCO3). A mineral containing calcium and phosphate ions and a univalent anion in a specific ratio; the major constituent of teeth and bones.  

Based on Greek antron meaning “cave,” a cavity or chamber in the body, often within bone. Any cavity inside the body, especially one in bone. Section of the stomach that terminates at the pylorus. A cavity, especially a cavity in a bone. The mastoid (or tympanic) antrum is the space connecting the air cells of…

The surgical opening of an antrum for purposes of drainage or grafting. A surgical operation to make an opening in the maxillary sinus to drain an antrum. A surgical operation to produce a permanent or semipermanent artificial opening to an antrum in a bone, so providing drainage for any fluid. The operation is sometimes carried…

Inspection of an antrum using an antroscope.  

An instrument for illuminating and examining the maxillary sinus. An endoscope that can be introduced into the stomach via the esophagus to obtain a view of the pyloric antrum, the region of the stomach wall near the pyloric sphincter. An instrument for visual examination of a cavity, especially the maxillary sinus.  

Calcified mass found in the maxillary sinus, resulting from the complete or partial encrustation of a foreign body (e.g., retained root).  

Multilocular, pendulous, irregularly shaped edematous space usually associated with rhinosinusitis.  

Inferior bony wall of the maxillary sinus cavity.