What is maxillary air sinus ?

Related Mcqs:

1. Maxillary sinus is described as a four sided pyramid containing base, apex, roof and floor. The apex of maxillary sinus extends________________?

   A. Laterally into zygomatics process of maxilla
   B. Medially into zygomatic process of maxilla
   C. Laterally into lateral nasal wall
   D. Superiorly into floor of orbit

2. The maxillary air sinus opens into middle meatus at______________?

   A. Infundibulum
   B. Summit of infundibulum
   C. Bulla ethmoidalis
   D. Hiatus semilunaris

3. The maxillary sinus drains into_______________?

   A. Middle plexus
   B. Inferior meatus
   C. Superior meatus
   D. Spheno ethmoidal recess

4. The tooth present close to maxillary sinus is_________________?

   A. 1st molar
   B. 2nd premolar
   C. 1st premolar
   D. 2nd molar

5. The process of recesses formation in maxillary sinus is most frequently seen with________________?

   A. Zygomatic process
   B. Frontal process
   C. Alveolar process
   D. Palatine process

6. Functional importance of maxillary sinus is______________?

   A. Lightening of skull weight and production of bactericidal lysozyme to the nasal cavity
   B. Protects the brain against exposure to cold air by arresting air in sinus temporarily
   C. Resonance of voice and enhancement of faciocranial resistance to mechanical shock
   D. All of the above

7. The type of epithelium lining maxillary sinus is_______________?

   A. Simple columnar
   B. Pseudo stratified columnar and cilliated
   C. Stratified squamous
   D. Simple squamous

8. Mobility of teeth in carcinoma of Maxillary sinus is due to involvement by tumor of_________________?

   A. Anterior wall of the sinus
   B. Posterior wall of the sinus
   C. Roof of the sinus
   D. Floor of the sinus

9. In comparison to maxillary central incisor , Maxillary canine has a height of contour that is______________?

   A. More
   B. Less
   C. Same
   D. Different on different teeth

10. The maxillary lateral incisor is smaller than the maxillary central incisor on all aspects EXCEPT which one of the following______________?

    A. Crown length
    B. Mesiodistal crown width
    C. Faciolingual crown width
    D. Root length