The situation of Paranasal
Sinuses in direct proximity to the bony cavity of the skull containing
the eye and associated structures, the eye socket, the brain, the
roots of the teeth, can influence illness.
The paranasal sinuses
laid out in pairs enlarge the surface of the nasal cavity. Based
on the anatomical situation and development we can differentiate
the frontal sinus, the maxillary sinus, and the sphenoid sinus.
They all have different entrances to the different passages of the
The development of
paranasal sinuses begins as evaginations of the nasal mucous membrane
during the 2nd and 4th month of pregnancy. Further development takes
place after birth. With the start of the 2nd teething, a further
The process of development
is completed after puberty. The construction of the single sinus
can be individually quite different and also dissimilar on both
sides of the same person.
An inflammation of
the ethmoidal (ethmoid, a bone at the root of the nose forming part
of the cranium, with perforations through which pass the olfactory
nerves) cells, can infect the brain, or the bony cavity of the skull
containing the eye and associated structures and develop into meningitis
or retrobulbar abscess.
The maxillary sinus
is easily irritated by granuloma (response to infection, inflammation,
or the presence of a foreign substance) of the roots of the 2nd
premolar and 1st molar teeth. The hiatus semilunaris, which is the
opening of the maxillary sinus to the middle passage of the nose
is located at the lowest point of the sinus, therefore, a congestion
of secretion is very likely.