Schneiderian Membrane
Pronunciation: shny-DEER-ee-an
The periosteal lining of the maxillary sinus composed of pseudostratified ciliated columnar epithelium, which must be elevated and preserved intact during sinus augmentation procedures.
Full Definition
The Schneiderian membrane is the thin mucoperiosteal layer lining the internal surface of the maxillary sinus, named after the anatomist Conrad Victor Schneider. It consists of an epithelial layer (pseudostratified ciliated columnar epithelium) and an underlying periosteum. During sinus floor elevation procedures, this membrane must be carefully elevated from the sinus floor without perforation to create a protected space for graft material beneath it. Perforation of the Schneiderian membrane is the most common intraoperative complication of sinus augmentation, potentially compromising graft containment and increasing infection risk. Editors should capitalise 'Schneiderian' (eponymous adjective) and not confuse the membrane with the maxillary sinus floor (bone) itself.
Usage
Usage note: Always capitalise 'Schneiderian' as an eponymous term. Do not write 'schneiderian membrane'. Distinguish from the sinus floor (bony structure) in clinical descriptions.
In Context
- "A small perforation of the Schneiderian membrane was repaired intraoperatively using a collagen membrane before graft placement." — Complication management case report
- "The editors flagged two instances of 'schneiderian membrane' with a lowercase 's' and corrected both to the capitalised eponymous form." — Manuscript copyediting notes