Exam 2 - Max Sinus Infections

Question 1

What accounts accounts for approximately 10-12% of maxillary sinusitis cases?

Answer 1

Odontogenic sinusitis

Question 2

What are the 4 pairs of sinuses?

Answer 2

Frontal
Ethmoid
Maxillary
Sphenoid

Question 3

MB root of Maxillary 2nd molar Root is closest or further to floor of sinus?

Answer 3

Closest it is 1.97mm

Question 4

The premolars are closest or furthest from floor of sinus?

Answer 4

Furtherest

Question 5

What order from closest to furthest are the maxillary teeth to the floor of maxillary sinus?

Answer 5

2nd molars
1st moalrs
3rd molars
premolars

Question 6

What line the sinuses?

Answer 6

pseudostratified columnar epithelia which secrete mucous

The mucous must be pushed into nose into the middle meatus of the nose

Question 7

Development of maxillary sinus

Answer 7

It is the first of the paranasal sinuses to form (it forms in the 3rd month of fetal life. 5th month of fetal life, it begins to grow into adjacent maxilla). Final growth of max sinus is 12-14 years which correlates with permanent teeth dentition eruption.

Question 8

Non-Odontogenic infections are of what microbiology?

Answer 8

Primary aerobic bacteria

H. parainfluenza
S. viridans
B-hemolytic streptococci
S. pneumonia
S. aureus

Question 9

Odontogenic infections are of what microbiology?

Answer 9

More likely ANAEROBIC, mixed

Question 10

Waters view of Maxillary Sinusitis will show?

Answer 10

increased cloudiness on side of infection

Question 11

CT scans of sinuses

Answer 11

If infection is present, there will be increased greyish area on the floor of the sinuses.

The dark areas of the sinuses may also be increased

Question 12

Mechanical injury to teeth during RCT

Overfilling of RCT

Dental extractions

Implant complications

can all cause what

Answer 12

maxillary sinus infections

Question 13

If there is an apical inflammatory lesions at the root of apices what is the mm cut off for removal?

Answer 13

less than 3 mm you can leave it

Question 14

What are symptoms of oro-antral fistula?

Answer 14

escape of fluids from the nose
Escape of air from mouth to nose
alteration in vocal resonance

Question 15

If there is an oro antral how do you confirm?

Answer 15

large - by inspection

small - nose blowing test

Question 16

what is the incidence of odontogenic sinusitis?

Answer 16

12-14%

Question 17

Odontogenic infections are mostly seen in?

Answer 17

males and elderly

Question 18

First molars followed by second molar teeth are most commonly involved in odontogenic sinusitis

Answer 18

True . Even tho 2nd molar MB root is closest to floor