Thus composition of gas content in the maxillary sinus is similar to venous blood, with high carbon dioxide and lower oxygen levels compared to breathing air.
22.
Furthermore, the drainage orifice lies near the roof of the sinus, and so the maxillary sinus does not drain well, and infection develops more easily.
23.
In addition, when a maxillary molar or premolar is lost, the floor of the maxillary sinus expands, which further diminishes the thickness of the underlying bone.
24.
Sinusitis resulting from maxillary sinus augmentation is considered a Class 1 sinonasal complication according to Felisati classification and should be addressed surgically with a combined endoscopic endonasal and endoral approach.
25.
He is especially known for his description of the maxillary sinus, which used to be more popularly referred to as the "'antrum of Highmore " '.
26.
|File : Cleidocranial dysplasia teeth . jpg | Panoramic view of the jaws showing multiple unerupted supernumerary teeth mimicking premolar, missing gonial angles and underdeveloped maxillary sinuses in cleidocranial dysplasia.
27.
This is particularly important following the removal of upper wisdom teeth, as their nerve can extend up into the maxillary sinus, and inadequate healing may lead to a permanent oroantral fistula.
28.
Inflammation may be restricted to a single sinus or may be present in several or in all of one or both sides but the maxillary sinus is the commonest victim of all the sinuses.
29.
The maxillary sinus appears as a shallow groove on the nasal surface of the bone about the fourth month of development, but does not reach its full size until after the second dentition.
30.
The bone between the floor of the maxillary sinus and the roots of the upper back teeth is very thin, and frequently the apices of these teeth disrupt the contour of the sinus floor.
