Odontogenic Infection MCQs _ OMFS MCQs

Odontogenic Infection MCQs _ OMFS MCQs

1. Trismus associated with infection of lateral pharyngeal space is related to irritation of the
a) Buccinator
b) Masseter
c) Lateral pterygoid
d) Medial pterygoid

2. Garre’s osteomyelitis is
a) Chronic focal sclerosis and non-supportive osteomyelitis
b) Chronic focal sclerosis and suppurative osteomyelitis
c) Characterised by suppuration and acute pain
d) Chronic diffuse sclerosing osteomyelitis

3. Death in Ludwig’s angina occurs due to
a) Sepsis
b) Respiratory obstruction
c) Cavernous sinus thrombosis
d) Carotid blow-out

4. The roof of pterygo-mandibular space is formed by
a) Temporalis muscle
b) Medial pterygoid muscle
c) Cranial base
d) Lateral pterygoid

5. Retropharyngeal space infection is mainly due to spread of
a) Cervical tuberculosis
b) Meningo encephalitis
c) Mumps
d) Odontogenic infections

6. The distinguishing feature of maxillary space infection is
a) Pain
b) Dysphagia
c) Trismus
d) Swelling

7. The greatest barrier to infection is
a) Connective tissue
b) Epithelium
c) Muscle
d) Fascia

8. Osteoradionecrosis is due to
a) Infection
b) Endarteritis of blood vessels
c) Sepsis
d) None of the above

9. A mandibular dental infection which exists the buccal cortical plate above the muscle attachment will cause abscess of
a) Buccal space
b) Masseter space
c) Vestibular sulcus
d) Masticatory space

10. Which of the following is not a primary mandibular space
a) Buccal
b) Sublingual
c) Submandibular
d) Pterygomandibular

11. Treatment of garre’s osteomyelitis is
a) Incision & drainage
b) Sequestrectomy
c) Saucerization
d) Surgical recontouring

12. Odontogenic infections are mostly caused by
a) MIXED bacteria
b) Anaerobic bacteria
c) Aerobic bacteria
d) Streptococci

13. The infection from a lower third molar pericoronal area spreads mostly to __ space
a) Submandibular
b) Submental space
c) Pterygomandibular
d) Buccal space

14. Involucrum is
a) Dead bone
b) New live bone surrounding dead bone
c) Previous live bone
d) Sclerotic bone

15. 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

16. The most definite clinical sign indicating odontogenic infection in to the maxillary space is:
a) Trismus
b) Xerostomia
c) Difficulty in swallowing
d) Swelling in submental area

17. Which of the following does not suggest postoperative infection?
a) Increase in temperature
b) Swelling
c) Pain
d) Pitting edema

18. Ludwig’s angina is characterized by
a) Raised tongue
b) Elevation of ear lobe
c) Trismus
d) Unilateral swelling

19. In a 19 years old patient, with a swelling over the left angle of the mandible, temperature of 38°C and negative history of trauma, one should suspect:
a) Spontaneous fracture of the mandible
b) Pericoronal infection
c) Mumps
d) Sjögren’s syndrome

20. Osteomyelitis:
a) Never occurs in infants
b) In acute cases fracture mandible is very common
c) Of mandible can show symptoms of lip Paresthesia
d) Produces no lymphadenopathy

21. Dead bone is seen on the X-ray as:
a) More radiolucent
b) More radiopaque
c) With osteophytes growing out
d) Soap-bubble appearance

22. The most dangerous type of spread of infection from apical abscess is, to:
a) Infratemporal fossa
b) Pterygoid
c) Parapharyngeal space
d) Submandibular space

23. Hyperbaric oxygen is indicated for
a) Obstructive lung diseases
b) Osteoradionecrosis
c) Cardiac failure
d) Renal diseases

24. Cavernous sinus thrombosis following infection of anterior maxillary teeth most often from spread of infection along
a) Facial artery
b) Angular artery
c) Ophthalmic vein
d) Pterygoid plexus

25. A tender swelling in submandibular triangle is mostly likely diagnosed as
a) Lymphadenopathy
b) Ludwig’s angina
c) Phelgom
d) None of the above

26. A patient has an infectious process associated with maxillary right lateral incisor that tooth is deeply carious and non-restorable. His temperature is 102°F. The patient has not been able to chew for the past 24 hours. The right side of the face is swollen. The patient cannot open his right eye, on palpation the area is soft, painful to touch and tissue rebound when palpated; treatment for the patient should be
a) Aspiration
b) Antibiotics of Heat only
c) Incision and Drainage
d) Antibiotics, heat and fluid.

27. Infection of masticatory space is usually associated with
a) Tonsillar abscess
b) Mandibular molar
c) Lateral pharyngeal space
d) Parotid space infection

28. A diagnosis of cavernous sinus thrombosis is made on the basis of:

1. Known site of infection
2. Septicemia
3. Venous obstruction in retina conjunctiva or eyelid
4. Paresis of third fourth and sixth nerves
5. Abscess formation in neighboring soft tissues
6. Nuchal rigidity
   a) 1, 2, 3, 4, 5
   b) 3, 4, 5
   c) 1, 2, 5, 6
   d) All the above correct

29. Osteomyelitis of the jaw can be cured by
a) Resection
b) Physiotherapy
c) Sequestrectomy with antibiotic treatment
d) Drainage

30. Lateral pharyngeal space is not connected directly by:
a) Buccal space
b) Sublingual space
c) Submandibular space
d) Retropharyngeal space

31. A periapical abscess of a mandibular second molar space spreads most commonly to the
a) Submandibular space
b) Temporal space
c) Sublingual space
d) Infra temporal space

32. Palatal abscess most commonly results from in infection of:
a) Maxillary centrals
b) Maxillary laterals
c) Maxillary canine
d) Maxillary premolars

33. Infection from maxillary first molar drains into
a) Submandibular space
b) Infratemporal space
c) Buccal space
d) Infraorbital space

34. After incision and drainage of an abscess the infectious process has failed to regress inspite 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

35. Which of the following is not present in pterygomandibular space
a) Auriculo temporal nerve
b) Lingual nerve
c) Mandibular nerve
d) Myalohyoid nerve

36. Which of the following features is not associated with acute osteomyelitis of mandible
a) Severe pain
b) Purulent exudate
c) Paresthesia of lower tip
d) Radiographic evidence of bone destruction

37. The incision for drainage in Ludwig’s angina extends:
a) Up to the neck
b) To the angle of the mandible
c) Floor of mouth
d) All the above

38. Boundaries of the pterygomandibular space includes all the following EXCEPT
a) Lateral pterygoid muscle.
b) Parotid gland.
c) Masseter muscle.
d) Buccinator muscle.

39. After extraction of upper central incisor, patient develops ophthalmoplegia, meningitis and lateral rectus paralysis. The diagnosis is
a) Cavemous sinus thrombosis
b) Not related
c) Cellulitis
d) Ludwig’s angina

40. 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

41. Subperiosteal abscess, penetrating deep is seen after extraction of
a) Maxillary 3rd molar
b) Mandibular 3rd molar
c) Maxillary 1st molar
d) Mandibular 1st molar

42. In infection involving the submandibular space when extra oral incision 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 muscle and deep cervical fascia.

43. In pericoronal abscess related to disto angular impacted lower third molars the infection may spread to:
a) Submasseteric space
b) Sublingual space
c) Submental space
d) Buccal space

44. Sequestrum means:
a) Is necrosed bone, separated from its surrounding
b) Is a broken tooth piece
c) Is new bone formed in osteomyelitis
d) Is necrosed tooth

45. Masticator space infection usually results from:
a) Infections of the last two lower molar
b) Non aseptic technique in local anaesthesia
c) External or internal trauma to the mandibular angle region
d) All of the above

46. “Dumb-bell” shaped swelling is characteristic of which type of odontogenic space infections:
a) Submandibular space
b) Buccal space infection
c) Submasseric space infection
d) Temporal space infection

47. Allof the following are present in pterygomandibular space except:
a) Nerve to mylohyoid
b) Chorda tympani
c) Long buccal nerve
d) Nerve to pterygoid

48. 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

49. 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

50. Standard airway for Ludwig’s Angina:
a) Tracheostomy
b) Cricothyrotomy
c) Nasal intubation
d) Oral intubation

51. Which of the following is a secondary site of spread of odontogenic infection involving pterygomandibular space?
a) Infra temporal space
b) Canine space
c) Buccal space
d) Sublingual space

52. ‘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

53. Ludwig angina is usually caused by
a) Streptococci and various mixed anaerobes
b) Anaerobic infection by prevotella and fusobacterium.
c) Paramyxovirus.
d) Candida species.

54. 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 thrombisis

55. A 58-year-old healthy man was evaluated for a toothache of 2 day’s duration. He was treated with oral penicillin and an opiate analgesic and advised to have the affected teeth pulled. He returned less than 24 hours later reporting severe swelling in the neck, sore throat, chills, and chest pain. On examination, the floor of his oral cavity was saturated and woody, and he had marked tenderness and adenopathy throughout his neck. He had erythema spreading from his neck down over his anterior chest wall where his chest pain was localized

A. The patient is suffering from
a) Quinsy
b) Ludwigs angina
c) Acute parotitis
d) Angioneurotic edema

B. This condition is an emergency as it can lead to
a) Difficulty in swallowing
b) Aspiration pneumonia
c) Air way obstruction
d) CSOM

C. The infection spreads to the
a) Submental, sublingual, and submandibular spaces
b) Parapharangeal spaces
c) Nasopharyngeal area
d) Sinusis

D. The treatment of choice in such an acute condition would be
a) Antibiotic and antifungal therapy
b) Removal of the offending tooth
c) Continue the penicillin in larger doses
d) Surgical drainage, antibiotic and intensive care

56. There is a swelling in a patient with respect maxillary LI, since last 48 hours, the swelling is hot & palpable rebound on pressure, the treatment of choice is
a) Incision & drainage
b) Antibiotic coverage
c) Antibiotics of heat only
d) Aspiration

57. 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 &prevertebral fascia

58. Untrue regarding ludwig’s angina:
a) Involves submandibular, sublingual & submental space
b) Involves bilateral mandibular spaces & lymphadenopathy
c) Bilateral submandibular, sublingual & submental spaces along with salivary gland enlargements
d) None

59. Sublingual space is divided from submandibular space by:
a) Fibres of mylohyoid
b) Submandibular gland
c) Body of mandible
d) Geniohyoid

60. Penrose drain is
a) A simple rubber tube opens at one end
b) Simple rubber tube opens at both ends
c) Modified corrugated rubber drain
d) Modified Foley’s Catheter

61. A patient comes to the emergency with Ludwig’s angina? Which of the following is done first?
a) Incision and drainage
b) Antibiotic and I.V. fluid infusion
c) Fiberoptic nasotracheal intubation/tracheostomy under local anesthesia
d) Tracheostomy under General Anesthesia

62. Which of the following order is correct?
a) Abscess-cellulitis-inoculation
b) cellulitis-innoculation-abscess
c) Innoculation-cellulitis-abscess
d) Innoculation-abscess-cellulitis

63. You are presented with a patient having a diffuse swelling in the neck bilaterally below the chin region. Intra orally the lower molar is infected on left side

63A. What is the probable source of infection?
a) Sub maxillary space infection
b) Sub mandibular space infection
c) Sub lingual space infection
d) Sub mental space infection

63B. Incision is made for drainage at?
a) Most prominent part of swelling
b) Most dependent part of swelling
c) Choose the area were esthetics is not compromised
d) All of the above

63C. Severe cellulites in the sub maxillary, sub lingual and sub mental spaces may cause death due to
a) Severe sepsis
b) Asphyxiation
c) Both severe sepsis and asphyxiation
d) Edema of the glottis

64. A 36 year old male patient has report to you with swelling in the submandibular region. His tongue is elevated and he complains of dysphagia. He has high fever. Intra orally examination reveals grossly destructed lower first molar.

64A. What would be your initial diagnosis?
a) Sub mandibular space infection
b) Sub mental space infection
c) Both sub mandibular and submental infection
d) Para pharyngeal infection

64B. High fever associated with the above patient may be due to
a) Septiccemia
b) Reduced immunity
c) Severity of Infection
d) All of the above

64C. CST (culture sensitivity test) is carried out to evaluate
a) Severity of infection
b) Whether the antibiotic dosage is adequate
c) Antibiotic is most sensitive or least resistant
d) To decide when to stop the Antibiotics

64D. The surgical line of treatment may be
a) Extraction of the involved tooth
b) Incision and drainage
c) Placement of drain
d) All of the above

65. What is untrue about Ludwig angina?
a) It spreads bilaterally
b) Most common cause is dental infect
c) It involves submandibular and sublil
d) Involvement of submandibular glar nodes is common

66. Necrotizing fasciitis involves wh following?
a) Fascia
b) Skin
c) Muscle
d) All of the al

67. All are the characteristics of celluliti:
a) Acute onset
b) Doughy to indurated consistency
c) Caused by aerobic bacteria
d) Well circumscribed