Dental infections

Question 1

Common features of dentoalveolar abscess

Answer 1

-Severe pain
-Tenderness on percussion

Question 2

Pain in Dentoalveolar abscess caused by

Answer 2

Inflammatory mediators-> Kinins and Histamines
Increased pressure-> Fluid exudates

Question 3

Pain can be relieved by

Answer 3

Evacuation of pus
Extraction of tooth
Removal of infected pulp

Question 4

Spread of infection governed by

Answer 4

-Virulence of microorganisms
-Position of tooth in alveolus (relation of apices of muscle/proximity to lingual and buccal surfaces)

Question 5

Lack of treatment of Dentoalveolar abscess leads to

Answer 5

Chronic Dentoalveolar abscess-> Granuloma

Question 6

The granuloma has potential to

Answer 6

Stimulate epithelial cells-> cyst formation

Question 7

Acute phase radiographically

Answer 7

Loss of lamina dura
Ill defined margins

Question 8

Chronic abscesses/apical granuloma radiographically

Answer 8

Well circumscribed radiolucency

Question 9

Barriers against the spread of infection

Answer 9

-Bone
-Muscle
-Fascia
-Neurovascular bundles
-Skin

Question 10

Most common routes of spread of infection

Answer 10

• upper lip
• canine fossa
• infraorbital region
• buccal space
• palate
• submasseteric
• retropharyngeal;
• lateral pharyngeal
• pterygomandibular space
• infratemporal fossa
• parotid space
• buccinator space
• suprahyoid region
  – submandibular space
  – submental space
  – sublingual space

Question 11

Infection of upper lip originates from

Answer 11

upper anterior teeth

Question 12

spreads on to the orbicularis muscle from the labial sulcus between the levator labii superioris muscle and the levator angularis oris muscle.

Answer 12

Infection of upper lip

Question 13

Infection to canine fossa originates from

Answer 13

Maxillary canine or upper premolar teeth

Question 14

Infection of this space can cause circumorbital infection

Answer 14

Canine fossa

Question 15

Muscle that controls spread of infection in buccal space

Answer 15

Bucinator

Question 16

Infection in buccal space originates from

Answer 16

Maxillary and mandibular molars

Question 17

Usually confined to cheeck

Answer 17

Buccal space infection

Question 18

Infection of buccal space may spread to

Answer 18

-Temporal space
-Submandibular space
-Masseteric space
-Skin-> Fistula formation

Question 19

Infection of palate originates from

Answer 19

-Maxillary lateral incisor
-Palatal roots of posterior teeth

Question 20

Infection of this site very painful due to tightly bound tissue

Answer 20

Palate

Question 21

Infection of this space manifests as trismus

Answer 21

Pterygomandibular space

Question 22

Source of infection of Submasseteric space

Answer 22

Lower third molar pericoronitis

Question 23

Severe trismus characteristic of this space

Answer 23

Submasseteric space due to spasm of masseter muscle

Question 24

Infection of infratemporal space from

Answer 24

Maxillary molars

Question 25

Infratemporal space infection causes

Answer 25

-Pain with mouth opening -Dysphagia -Difficult lateral mandibular movements

Question 26

Infratemporal space infection can spread to

Answer 26

Orbit

Question 27

infection of parotid space is from

Answer 27

-Middle ear or mastoid region -Masseteric space -Lateral pharyngeal space

Question 28

Infection in submandibular space spreads from

Answer 28

Posterior mandibular teeth lingually below mylohyoid muscle

Question 29

Infection of submandibular space causes

Answer 29

-Pain -Redness of skin in region -Dysphagia

Question 30

Submental space infection arises from

Answer 30

Mandibular teeth through lingual cortex

Question 31

Swelling of submental space causes

Answer 31

-Pain -Difficulty swallowing -Buccal spread-> swelling of labial sulcus and over chin

Question 32

Infection in lingual space due to

Answer 32

Perforation of lingual cortex

Question 33

Infection of lingual space leads to

Answer 33

-Tongue displacement -Compromised airway -Dysphagia and difficult speech

Question 34

Infection of pharyngeal space originates from

Answer 34

-Mandibular molars -Third molar pericoronal suppuration

Question 35

Infection of pharyngeal space may cause

Answer 35

-Stiffness of neck -Swelling of lateral wall of pharynx -Dysphagia -Trismus

Question 36

Same clinical features as infection of lateral pharyngeal space

Answer 36

Retropharyngeal space

Question 37

Has significant risk of descending neck infection

Answer 37

Retropharyngeal space