Maxillary sinus

MAXILLARY SINUS:

1). Ostium of maxillary sinus opens into

a)      Inferior meatus

b)      Middle meatus

c)      Superior meatus

d)     None of the above.

       ANS: B

2). In the intact skull size of the opening of maxillary sinus is reduced by

a)      Uncinate process of ethmoid.

b)      Inferior nasal concha

c)      Perpendicular plate of palatine bone

d)     All of the above.

       ANS: D.

      3). Drainage of maxillary sinus is difficult in chronic conditions because

a)      Ostium lies at a highr level then its floor.

b)      Cilia in the lining mucosa are destroyed

c)      Both a and b

d)     None of the above.

        ANS: C.

      4). All of the following are the methods to remove the roots accidentally displaced into the maxillary antrum except:

a)      Patient is asked to blow air with nostrils closed.

b)      Insert suction tip into the antrum.

c)      Place iodoform gauze in the sinus and pull out in 1 stroke so tat the root piece comes out with the gauze

d)     Refer to an experienced surgeon to perform Caldwll-luc operation.

        ANS: B

       5). If a small opening is made into maxillary antrum during extraction, immediate treatment is

a)      Pack the socket with gauze

b)      Allow the clot to form no special t/t necessary.

c)      Place the pt. on antibiotics

d)     Raise a big mucoperiosteal flap and close the antrum.

      ANS: B.