MCQs on Odontogenic Infections - Oral and Maxillofacial Surgery

# Trismus associated with infection of lateral pharyngeal space is related to irritation of the:
A. Buccinator
B. Masseter
C. Lateral pterygoid
D. Medial pterygoid

# Garre's osteomyelitis is:
A. Chronic focal sclerosis and non suppurative osteomyelitis
B. Chronic focal sclerosis and suppurative osteomyelitis
C. Characterized by suppuration and acute pain
D. Chronic diffuse sclerosing osteomyelitis



# Death in Ludwig's angina occurs due to:
A. Sepsis
B. Respiratory obstruction
C. Cavernous sinus thrombosis
D. Carotid blow-out

# The roof of pterygomandibular space is formed by:
A. Temporalis muscle
B. Medial pterygoid muscle
C. Cranial base
D. lateral pterygoid

# Retropharyngeal space infection is mainly due to spread of:
A. Cervical tuberculosis
B. Meningoencephalitis
C. Mumps
D. Odontogenic infections

# The distinguishing feature of masticatory space infection is:
A. Pain
B. Dysphagia
C. Trismus
D. Swelling

# The greatest barrier to infection is:
A. Connective tissue
B. Epithelium
C. Muscle
D. Fascia

# Osteoradionecrosis is due to:
A. Infection
B. Endarteritis of blood vessels
C. Sepsis
D. None of the above

# A mandibular dental infection which exits the buccal cortical plate above the muscle attachment will cause abscess of:
A. Buccal space
B. Masseter space
C. Vestibular sulcus
D. Masticatory space

# Which of the following is not a primary mandibular space?
A. Buccal
B. Sublingual
C. Submandibular
D. Pterygomandibular

# Treatment of Garre's osteomyelitis is:
A. Incision and drainage
B. Sequestrectomy
C. Saucerization
D. Surgical recontouring

# Odontogenic infections are most commonly caused by:
A. Mixed bacteria
B. Anaerobic bacteria
C. Aerobic bacteria
D. Streptococci


# The infection from a lower third molar pericoronal area spreads mostly to _________ space.
A. Submandibular
B. Submental space
C. Pterygomandibular space
D. Buccal space

# Involucrum is:
A. Dead bone
B. New live bone surrounding dead bone
C. Previous live bone
D. Sclerotic bone

# The facial space that is divided by styloid process into an anterior and posterior compartment is:
A. Pterygomandibular
B. Lateral pharyngeal
C. Retropharyngeal
D. Infratemporal

# The most definite clinical sign indicating odontogenic infection in to the masticatory space is:
A. trismus
B. xerostomia
C. difficulty in swallowing
D. swelling in submental area

# Which of the following does not suggest post operative infection?
A. Increase in temperature
B. Swelling
C. Pain
D. Pitting edema

# Ludwig's angina is characterized by:
A. Raised tongue
B. Elevation of ear lobe
C. Trismus
D. Unilateral swelling

# In a 19 year old patient with a swelling over the left angle of the mandible, temperature of 38 degrees centigrade and negative history of trauma, one should suspect:
A. spontaneous fracture of the mandible
B. pericoronal infection
C. Mumps
D. Sjogren's syndrome

# Osteomyelitis:
A. never occurs in infants
B. in acute cases fracture of the mandible is very common
C. of mandible can show symptoms of lip paresthesia
D. produces no lymphadenopathy

# Dead bone is seen on the radiograph as:
A. more radiolucent
B. more radioopaque
C. with osteophytes growing out
D. soap bubble appearance

# The most dangerous type of spread of infection from apical abscess is to:
A. Infratemporal fossa
B. Pterygoid
C. Parapharyngeal space
D. Submandibular space

# Hyperbaric oxygen is indicated for:
A. Obstructive lung disease
B. Osteoradionecrosis
C. Cardiac failure
D. Renal disease

# Cavernous sinus thrombosis following infection of anterior maxillary teeth most often from infection along:
A. Facial artery
B. Angular artery
C. Ophthalmic vein
D. Pterygoid plexus

# A tender swelling in submandibular triangle is most likely diagnosed as:
A. Lymphadenopathy
B. Ludwig's angina
C. Phlegmon
D. None of the above

# Infection of masticatory space is usually associated with:
A. tonsillar abscess
B. mandibular molar
C. lateral pharyngeal space
D. Parotid space infection

# A diagnosis of cavernous sinus thrombosis is made on the basis of: i) known site of infection ii) septicemia iii) venous obstruction in retina, conjunctiva, or eyelid iv) Paresis of third, fourth, and sixth nerves v) Abscess formation of neighboring soft tissues vi) Nuchal rigidity
A. 1,2,3,4,5
B. 3,4,5
C. 1,2,5,6
D. All of the above correct

# Osteomyelitis of the jaw can be cured by:
A. Resection
B. Physiotherapy
C. Sequestrectomy with antibiotic treatment
D. Drainage

# Lateral pharyngeal space is not connected directly to:
A. Buccal space
B. Sublingual space
C. Submandibular space
D. Retropharyngeal space

# A periapical abscess of a mandibular second molar space spreads most commonly to the:
A. Submandibular space
B. Temporal space
C. Sublingual space
D. Infratemporal space

# Palatal abscess most commonly results from infection of:
A. Maxillary centrals
B. Maxillary laterals
C. Maxillary canine
D. Maxillary premolars

# Infection from maxillary first molar drains into:
A. Submandibular space
B. Infratemporal space
C. Buccal space
D. Infraorbital space

# After incision and drainage of an abscess, the infectious process has failed to regress in spite of the patient being on high doses of an antibiotic. It would be wise to:
A. Insert a large drain
B. Repeat culture and sensitivity tests
C. Debride and irrigate the area with a fibrinolytic agent
D. Begin the parenteral administration of proteolytic enzymes to augment the antibiotics

# Which of the following is not present in pterygomandibular space?
A. Auriculotemporal nerve
B. Lingual nerve
C. Mandibular nerve
D. Mylohyoid nerve

# Which of the following features is not associated with acute osteomyelitis of mandible ?
A. Severe pain
B. Purulent exudate
C. Paresthesia of lower lip
D. Radiographic evidence of bone destruction

# The incision for drainage in Ludwig's angina extends:
A. upto neck
B. to the angle of mandible
C. floor of mouth
D. all of the above

# Boundaries of the pterygomandibular space includes all of the following except:
A. Lateral pterygoid muscle
B. Parotid gland
C. Masseter muscle
D. Buccinator muscle

# After extraction of upper central incisor, patient develops opthalmoplegia, meningitis and lateral rectus paralysis. The diagnosis is:
A. Cavernous sinus thrombosis
B. Not related
C. Cellulitis
D. Ludwig's angina

# Pericoronitis is seen in relation to:
A. Impacted third molars only
B. Around incompletely erupted crown
C. Completely erupted crowns only
D. None of the above

# Subperiosteal abscess, penetrating deep is seen after extraction of:
A. Maxillary third molar
B. Mandibular third molar
C. Maxillary first molar
D. Mandibular first molar

# In infection involving the submandibular space when extra oral incision and drainages are necessary, which of the following structures should be divided?
A. Skin only
B. Skin, superficial fascia only
C. Skin, superficial fascia, platysma and masseter muscle
D. Skin, superficial fascia, platysma, masseter and deep cervical fascia

# In pericoronal abscess related to distoangular impacted lower third molars, the infection may spread to:
A. Submasseteric space
B. Sublingual space
C. Submental space
D. Buccal space

# Sequestrum means:
A. necrosed bone, separated from its surrounding
B. a broken tooth piece
C. is new bone formed in osteomyelitis
D. is necrosed tooth

# Masticatory space infection usually occurs from:
A. Infections of the last two lower molar
B. Non aseptic technique in local anesthesia
C. External or internal trauma to the mandibular angle region
D. All of the above

# Dumb bell shaped swelling is characteristic of which type of odontogenic space infections?
A. Submandibular space infection
B. Buccal space infection
C. Submasseteric space infection
D. Temporal space infection

# All of the following are present in pterygomandibular space except:
A. Nerve to mylohyoid
B. Chorda tympani
C. Long buccal nerve
D. Nerve to pterygoid


# Cavernous sinus thrombosis can occur due to spread of odontogenic infection via:
A. Tissue Spaces
B. Lymphatic route
C. Hematogenous route
D. All of the above

# Which of the following infection is the cause for multiple sites of osteomyelitis of the jaw:
A. Peritonsillar abscess
B. Local Trauma
C. Hematogenous infection
D. Buccal space infection

# Standard airway for Ludwig's angina :
A. Tracheostomy
B. Cricothyrotomy
C. Nasal intubation
D. Oral intubation

# Which of the following is a secondary site of spread of odontogenic infection involving pterygomandibular space?
A. Infratemporal space
B. Canine space
C. Buccal space
D. Sublingual space

# 'Hot potato' voice is characteristically seen in:
A. Pterygomandibular space infection
B. Retropharyngeal space infection
C. Pre tracheal space infection
D. Lateral pharyngeal space infection

# Ludwig's angina is usually caused by:
A. Streptococci and various mixed anaerobes
B. Anaerobic infection by Prevotella and Fusobacterium
C. Paramyxovirus
D. Candida species

# The most common serious complication which can occur following surgery in maxillary incisor region is:
A. Iritis
B. Cellulitis
C. Periapical abscess
D. Cavernous sinus thrombosis

# There is a swelling with respect to maxillary lateral incisor, since 48 hours. The swelling is hot and palpable, rebound on pressure. The treatment of choice is:
A. Incision and drainage
B. Antibiotic coverage
C. Antibiotics of heat only
D. Aspiration

# In oral and maxillofacial surgery, 'danger space' is known as:
A. carotid sheath
B. Posterior to carotid sheath in posterior triangle of neck
C. posterior to transverse process of vertebrae
D. space between alar and prevertebral fascia

# Untrue regarding Ludwig's angina:
A. Involves submandibular, sublingual, and submental space
B. Involves bilateral mandibular spaces and lymphadenopathy
C. Bilateral submandibular, sublingual and submental spaces alongwith salivary gland enlargements
D. None

# Sublingual space is divided from submandibular space by:
A. Fibres of mylohyoid
B. Submandibular gland
C. Body of mandible
D. Geniohyoid

# Penrose drain is:
A. a simple rubber tube which opens at one end
B. simple rubber tube which opens at both ends
C. Modified corrugated rubber drain
D. Modified Foley's catheter

# A patient comes to the emergency with Ludwig's angina. Which of the following is done first?
A. Incision and drainage
B. Antibiotic and IV fluid infusion
C. Fiberoptic nasotracheal intubation/tracheostomy under local anesthesia
D. Tracheostomy under general anesthesia