What are the boundaries of maxillary sinus?

What are the boundaries of maxillary sinus?

Radiographically, the maxilla sinus has the following borders: Superiorly, the maxillary sinus is bordered by the orbital floor, which houses the infraorbital canal. Inferiorly, the floor of the maxillary sinus approximates the roots of the maxillary teeth.

What does the maxillary sinus communicate with?

The nasal wall of the maxillary sinus, or base, presents, in the disarticulated bone, a large, irregular aperture, communicating with the nasal cavity.

Which sinuses are paired?

There are four paired sinuses in humans, all lined with pseudostratified columnar epithelium: the maxillary sinuses, the largest ones located under the eyes in the maxillary bones;[2] the frontal sinuses, superior to the eyes within the frontal bone; the ethmoid sinuses, formed from several air cells within the ethmoid …

Are sinuses interconnected?

That’s the story of your sinuses ― four pairs of air-filled interconnected cavities located between your eyes and nose. Along with the nasal passages in the nose, your sinuses produce and circulate mucus. While the sinuses are small, they can cause a lot of misery for some people.

Where are the maxillary sinuses located?

A type of paranasal sinus (a hollow space in the bones around the nose). There are two large maxillary sinuses, one in each of the maxillary bones, which are in the cheek area next to the nose. The maxillary sinuses are lined with cells that make mucus to keep the nose from drying out.

How many walls does the maxillary sinus have?

There are six maxillary sinus walls: the superior, anterior, lateral and medial walls are broad, with narrow posterior and inferior walls. Superior: the thin superior wall (forming most of the orbital floor), separates the contents of the orbit from the maxillary sinus.

What is the function of the maxillary sinus?

The maxillary sinuses might simply serve to improve the respiratory function of the nose. A flow of inspiratory air does not occur. The maxillary sinuses are decisively involved in the production of nitrogen monoxide (NO) and thus in supporting the immune defense of the nasal cavity.

What are the paired and unpaired venous sinuses?

There are seven paired (transverse, cavernous, greater & lesser petrosal, sphenoparietal, sigmoid and basilar) and five unpaired (superior & inferior sagittal, straight, occipital and intercavernous) dural sinuses.

Are left and right sinuses connected?

Sinuses actually begin to develop during the early years of life from an initial small pocket or pouch within the bones of the face. This pocket, which is connected to either the right or left nasal passage by the above channels, slowly enlarges and expands within the bone filling with air during this process.

Do both nostrils lead to the same place?

The two openings in the nose care called nostrils, or napes. They lead to two nasal cavities that are separated by the septum, a wall of cartilage. Inside the face is an intricate system of canals and pockets of air called sinus cavities.

Which nostril is connected to which ear?

The ear has three parts: the outer ear, the middle ear, and inner ear. The middle ear is connected to the top of the back of the throat by the Eustachian tube which is lined with mucous, just like the inside of the nose and throat….Our Locations.