Paranasal sinuses

What are the paranasal sinuses?

Air filled extensions of the nasal cavity. They are the maxillary, frontal, sphenoid and ethmoid sinuses.

Which sinus develops last?

The ethmoid sinus

Which sinus is defined as a cavity at birth?

The maxillary sinus

At what age do the frontal and sphenoid sinuses become visible on a radiograph?

6/7

What lines the nasal cavity?

Ciliated columnar epithelium

What is the largest sinus?

The maxillary sinus

How is the maxillary sinus bound?

Anteriorly bound by the facial surface of the maxilla and posteriorly bound by the pterygopalatine fossa

What is the nerve supply for the maxillary sinus?

Branches of the superior alveolar and infraorbital nerves from the maxillary division of the trigeminal nerve.

What is the nerve supply for the frontal sinus?

The supraorbital nerve from the ophthalmic division of the trigeminal nerve

What is the nerve supply for the ethmoid bone?

The ethmoidal branches of the maxillary division of the trigeminal nerve.

What is the nerve supply for the sphenoid sinus?

Ethmoidal branches of the maxillary division of the trigeminal nerve.

Where is the sphenoid sinus?

Directly below the sella turcica

What is a mandibular tori?

An Atypical bony growth which occurs near the floor of the mouth on the lingual aspect of your mandible

What is a possible complication when extracting an 16

Causing an infection called sinusitis due to the open contact between the maxillary sinus and the oral cavity