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Wednesday 10 July 2013

Maxillary Sinus-1

Questions
Answer
The maxillary sinus communicates with the environment via the
Middle nasal meatus
The initial event leading to development of maxillary sinus is at when the embryo is
32 millimeters
During embroyogenesis of maxillary sinus, lateral nasal wall begins to fold to form
Three nasal conchae ; three nasal meatus
The nasal meatus expands immediately into nasal wall as it is formed
Middle nasal meatus
During embroyogenesis of maxillary sinus the middle nasal meatus expands in a
Inferior direction
During embroyogenesis of maxillary sinus the middle nasal meatus expands in an inferior direction due to the presence
Lateral nasal capsule
The maxillary sinus is of 1 millimeter in diameter when the embryo is
50 millimeters
The maxillary sinus has developed its sinus epithelium when the embryo is
50 millimeters
The anteroposterior diameter of maxillary sinus perinatally is
7 - 16 millimeters
The maxillary sinus expands and modify itself till
All permanent teeth erupt
The most common cause of supernumerary maxillary sinus is
Outpocketing of nasal mucosa at two points
Supernumerary maxillary sinus have
Two ostia
The best way to describe a maxillary sinus is a
4 sided pyramid
The inferior surface of the maxillary sinus is formed by
Alveolar and zygomatic process
The four sinus wall converge laterally at an
Obtuse angle
The perforation of the maxillary sinus, ostium is seen at
Base of sinus
The maxillary sinus ostium is at the level of
Middle nasal meatus
The expansion of pneumatic spaces of maxillary sinus  beyond the maxillary body is referred to as
Recesses
The most common recesses of maxillary sinus involves the
Alveolar process
The occurrence of zygomatic recesses brings the space of maxillary sinus in proximity with
Superior alveolar nerve bundles
The presence of alveolopalatine recesses indicate that the bone between tooth apex and sinus is
Thinner
The most commonly involved tooth with alveolopalatine recesses is the roots of
Maxillary first molar
A fully well developed alveolar recesses have
Three depressions; 2 incomplete bony septa
The epithelial layer of maxillary sinus can be best described as
Pseudostratified, columnar and ciliated
The epithelial layer of maxillary sinus is derived from
Olfactory epithelium
The numerous cells in the maxillary sinus epithelium is the
Columnar ciliated cells
The attachment of ciliary microtubules to the maxillary sinus epithelial cells is facilitated by
Basal bodies
The basal bodies of the maxillary sinus epithelial cells are found in the
Apical segment
The typical cilia of the maxillary sinus epithelial cells are made of
9 + 1 pair of microtubules
The cilia facilitates the movement of mucous lining the maxillary sinus epithelium generally from the
Sinus interior toward nasal cavity
Congenital syphilis affect maxillary sinus causing the sinus to be
Smaller
The maxillary sinus is also known as
Antrum of Highmore

1 comment:

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