Maxillary sinus

from Wikipedia, the free encyclopedia
  • Frontal sinus (sinus frontalis)
  • Ethmoid cells (Cellulae ethmoidales)
  • Sphenoid sinus (sphenoid sinus)
  • Maxillary sinus (maxillary sinus)
  • The maxillary sinus ( Latin maxillary sinus ; also Sinus Highmori or Antrum Highmori , after Nathaniel Highmore ) is a paranasal sinus that invades into the upper jawbone ( maxilla ). The maxillary sinus is connected to the middle nasal passage through the nasal and jaw opening ( aperture nasomaxillaris ). Infectious agents can spread from the nasal cavity to the maxillary sinus through this opening . At the bottom of the maxillary sinus are alveoli of the maxillary molar teeth separated only by a thin layer of bone of the maxillary sinus. If the tooth roots suppurate , it can break through into the maxillary sinus.

    The infraorbital nerve runs through the maxillary sinus in a bony canal .


    • Inflammation of the maxillary sinus, see sinusitis
    • Accumulation of pus in the maxillary sinus, see empyema

    In the case of accumulations of pus or other pathological changes, an operative opening of the maxillary sinus from the outside may be necessary ( trepanation ).

    Animal kingdom

    Opened jawbone of a dog with a tear and nose duct

    In dogs , one speaks of a jawbone ( maxillary recess ) because the connection to the nasal cavity is very wide and it does not extend between the bone plates of the upper jaw, but between various neighboring cranial bones in this region. In the horse , the very large maxillary sinus is separated into an anterior and a posterior division by the maxillary sinus septum ( septum sinuum maxillarium ).


    • Franz-Viktor Salomon: respiratory system. In: Franz-Viktor Salomon, Hans Geyer, Uwe Gille (Ed.): Anatomy for veterinary medicine. 2nd, revised and expanded edition. Enke, Stuttgart 2008, ISBN 978-3-8304-1075-1 , pp. 324-367.