MCQs in Oral & Maxillofacial Surgery

Chapter 1: Principles of Oral Surgery

 

1- A 55 years old male patient presents to your clinic for the extraction of his upper right first molar. He explains to you that he has a cardiac stent and takes dipyridamole and 75mg of aspirin daily. Which of the following precautions are necessary:

  1. Take preoperative INR blood test
  2. Ask the patient to stop taking both the aspirin and the dipyridamole for 72 hours before the procedure
  3. Ask the patient to stop taking the aspirin 3 days before the procedure
  4. Ask the patient to stop taking the dipyridamole for 72 hours before the procedure
  5. Use local hemostatic measures after removing the tooth

 

 

 

 

 

The answer is: E

 

2- An 11 weeks pregnant woman walks into your clinic complaining of pain in her lower left wisdom tooth. The gingiva around the tooth looks inflamed and swollen. Upon clinical examination you realize that this tooth needs to be surgically removed. What is the most appropriate action to be taken at the moment?

  1. Avoid taking a radiograph of the area because this can harm the fetus
  2. Prescribe a course of oral metronidazole 200 mg three times daily for 5 days
  3. Advise chlorhexidine mouthwashes for the next week
  4. Prescribe ibuprofen as an analgesic
  5. Take an intraoral radiograph of the area to help your clinical assessment and decisionmaking, but make sure that the patient is wearing a lead apron

 

 

 

 

 The answer is: C

 

3- A 70 years female attends your clinic for the extraction of her lower left third molar. The patient brings a list of the medications she is currently taking. Which of the following drugs is known to cause delayed healing of extraction socket:

  1. Alendronic acid
  2. Alfentanil
  3. Aldactone
  4. Almotriptan
  5. Alverine

 

 

 

The answer is: A

 

4- For patients with idiopathic thrombocytopenic purpura. What measurements should be carried out to minimise the risk of complications associated with surgical procedures:

  1. The patient should be given desmopressin (DDAVP) prior to the extraction
  2. The patient should have their factor IX levels measured and be given the appropriate amount of factor IX before the extraction
  3. The patient should have a full blood count and be given platelets if necessary
  4. The patient should be given intramuscular tranexamic acid prior to the extraction
  5. An INR checked within 72 hours of any surgical procedure

 

 

 

 

The answer is: C

 

5- If patient comes with history of cardiac problem taking aspirin what will be the possible complication if you do extraction:

  1. Increases bleeding time.
  2. Increases prothrombin time.
  3. Increases clotting time.
  4. Increases partial thrombin time.
  5. Decreases bleeding time.

 

 

 

 

 

 The answer is: A

6- Cross bar elevator works on mechanical principle of:

  1. Wedge.
  2. Lever.
  3. Wheel & axle.
  4. Pulley.
  5. Hammer & axle.

 

 

 

 

 

 The answer is: C

 

7- Size of suture used commonly in oral cavity is:

  1. 1/0.
  2. 2/0.
  3. 3/0.
  4. 4/0.
  5. 5/0.

 

 

 

 

 

The answer is: C

 

8- Surgical blade used for drainage of abcess is:

  1. Blade no.12.
  2. Blade no.11.
  3. Blade no.15.
  4. Blade no.24.
  5. Blade no.22.

 

 

 

 

 

 

The answer is: B

9- Dean’s technique is also called:

  1. Inter radicular alveoloplasty
  2. Intra septal alveoloplasty
  3. Simple alveoloplasty
  4. Vestibuloplasty
  5. Lingual frenectomy

 

 

 

 

 

The answer is: B

 

10- If patient is taking heparin and we have to do surgery immediately, the effects of heparin can be reversed by:

  1. Vitamin K.
  2. Protamine sulfate.
  3. Fresh frozen plasma.
  4. Hydrocortisone.
  5. 5% dextrose.

 

 

 

 

 

The answer is: B

 

11- If a patient is taking cyclosporine-A. What will be its side effect in oral cavity:

  1. Mucosal ulceration.
  2. Gingival hyperplasia.
  3. Mucosal white lesion.
  4. Gingival recession.
  5. No side effect in oral cavity.

 

 

 

 

 

The answer is: B

12- Disto buccal root of upper 1st molar is supplied by:

  1. Middle superior alveolar nerve.
  2. Posterior superior alveolar nerve.
  3. Infra orbital nerve.
  4. Mental nerve.
  5. Buccal nerve.

 

 

 

 

 

 

The answer is: B

 

13- Which of 2 nerves blocked when injection is given in pterygo mandibular space?

  1. Buccal & lingual nerve.
  2. Lingual & inferior alveolar nerve.
  3. Buccal & inferior alveolar nerve.
  4. Buccal nerve & infra orbital nerve.
  5. Inferior alveolar & posterior superior alveolar nerve.

 

 

 

 

 

 

The answer is: B

 

14-One of the common side effects of Dilantin sodium therapy seen in oral cavity is:

  1. Stains on teeth.
  2. Hairy tongue.
  3. Gingival hyperplasia.
  4. Gingival recession.
  5. Mucosal ulceration.

 

 

 

 

 

 The answer is: C

15- A patient on steroid therapy has to undergo elective extraction of many teeth. The premedication indicated prior to surgical procedure is:

  1. NSAIDS
  2. Antibiotics
  3. Antihistamines
  4. Antihypertensives

 

 

 

 

 

The answer is: B

16- Most common cause of pulmonary embolism:

  1. Thrombophlebitis
  2. End Arteritis
  3. Atherosclerosis
  4. Lymphangitis

 

 

 

 

 

The answer is: A

 

17- A middle aged female patient has eyes widely placed, sparse hair, increased systolic BP, increased pulse pressure, weight loss and nervousness. She may be suffering from:

  1. Hyperthyroidism
  2. Hypothyroidism
  3. Hyperparathyroidism
  4. Hypopituitarism

 

 

 

 

 

 

The answer is: A


 

18- While giving Epidural nerve block by median approach which of the following ligaments are not encountered in the midline:

  1. Supraspinous ligament
  2. Interspinous ligament
  3. Posterior longitudinal
  4. Ligamentum flavum

 

 

 

 

 

The answer is: C

 

19- The distance between sinus floor and root tip is usually longest for:

  1. First premolar
  2. Second molar distobuccal root
  3. Second molar palatal root
  4. First molar palatal root

 

 

 

 

 

 

The answer is: A

 

20- The posterior wall of the maxillary sinus is closely related to:

  1. The posterior superior alveolar nerve
  2. The auriculotemporal nerve
  3. The facial nerve
  4. The inferior alveolar nerve

 

 

 

 

 

 

The answer is: A

 

 

21- In a healthy adult male, which of the following haematological values are correct?

  1. Hb= 9.5, Hct= 0.45; Plt= 250,000
  2. Hb= 15, Hct= 0.45; Plt= 250,000
  3. Hb= 15, Hct= 0.25; Plt= 170,000
  4. Hb= 10, Hct= 0.50; Plt= 250,000
  5. Hb= 15, Hct= 0.45; Plt= 550,000

 

 

 

 

 

The answer is: B

 

22. The type of bone which possesses a layer of cortical bone surrounding core of dense trabecular bone of good strength, which is usually present in anterior maxilla and is ideal for implant and/or graft integration predictability is considered:

  1. Type I bone
  2. Type II
  3. Type III
  4. Type IV

 

 

 

 

 

The answer is: C

 

23. In order to make the diagnosis of bisphosphonate-related osteonecrosis of the jaws, which of the following criteria need to be present?

  1. Painful exposed bone in the orofacial region
  2. The patient is on a current course of bisphosphonate drugs
  3. Presence of exposed bone in the orofacial region for 8 weeks or more
  4. Presence of a history of radiotherapy
  5. The patient has taken bisphosphonate drugs for more than 3 years

 

 

 

 

 

The answer is: C

 

 

24. A 65 years old patient presents to your clinic for enculation of a recurrent cyst and a biopsy in lower right molar area. The patient is currently taking warfarin The best time to perform an INR for this patient would be:

 

  1. One week before the procedure
  2. 5 days before the procedure
  3. 3 days before the procedure
  4. On the same day of the procedure
  5. Timing is irrelevant in this case

 

 

 

 

 

The answer is: D