Development of Paranasal Sinuses

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 nose.

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 growth begins.

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.