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 out to treat infection of the paranasal sinuses.
The operation in which an opening is made through the nose into the maxillary antrum.
Operation to form an opening in an antrum.