MCQs in GENERAL PRINCIPLES OF ORAL SURGERY
1. Which one of the following is a contraindication for extraction of teeth:
A. Endocarditis
B. Vincent’s infection
C. Glomerulonephritis
D.Rheumatic fever
2. Antibiotic prophylaxis dose of clindamycin in oral surgical procedures for infective endocarditis is:
A. 600 mg 1 hr before procedure
B. 300 mg 1 hr before procedure
C. 600 mg 2 hr before procedure
D. 300 mg 2 hr before procedure
3. Prophylactic antibiotic coverage before dental extraction is indicated for patients with each of the following conditions except:
A. Kidney damage needing hemodialysis
B. Prosthetic aortic valve
C. Rheumatic heart disease
D. Coronary artery bypass
4. The best time of extraction in pregnancy is:
A. First trimester
B. Second trimester
C. Third trimester
D. None of these
5. During the tooth extraction, a known cardiac patient experienced angina. This was most likely precipitated by:
A. allergy to the anesthetic agent
B. the stimulus of pain and anticipation
C. adrenaline in the drug
D. the upright position in the chair
6. For a patient undergoing anticoagulant therapy, who requires unavoidable dental surgical treatment, the dental surgeon should:
A. not take up the patient till the therapy is over
B. bring down the dosage and proceed further
C. adjust the dosage before and after dental visit
D. consult the physician of the patient for joint decision
7. A 60-year-old male with previous h/o of myocardial infarction is on 75 mg aspirin daily for the l< 6 months. He has to undergo extraction of carious lower 6. The indicated protocol treatment is
A. Extraction of the teeth without any change in the dose schedule of aspirin
B. Discontinue aspirin at least for 2-3 days before extraction
C. Discontinue aspirin at least for a week before extraction
D. Give DDAVP infusion to counteract the effects of aspirin and proceed with extraction
8. The following history and laboratory value contraindicate extraction of mandibular first molar:
a) Hb% is 15 gm% and hematocrit value is 42 per cent
b) Five months’ pregnant lady without any complications
c) Rheumatic patient taking penicillin
d) Prothrombin time is 45 seconds
9. Patient who is receiving anticoagulants requires extraction of a tooth. Laboratory data indicating prothrombin time is 21 seconds with a control time of 15 seconds. The treatment should consist of:
a) regulation of the anticoagulant level with heparin
b) injection of vit K and immediate extraction
c) injection of vit K and extraction after half an hour
d) extraction of the tooth and use of sutures and local hemostatic agent
10. ‘Rubber band’ extraction is a method of extraction in patients having:
a) bleeding disorders
b) myocardial infarction and angina pectoris
c) supernumerary teeth
d) impacted teeth
11. A male is taking 60 mg of hydrocortisone daily, on the day of extraction, this dose should be:
a) remain unchanged
b) reduced to half
c) doubled
d) reduced to one fourth
12. The patients who are deficient of endogenous steroids and undergoing maxillofacial surgery, the most preferred full spectrum corticosteroid for pre, intra and post operative prophylactic steroid therapy is:
a) Dexamethasone
b) Methyl prednisolone
c) Triamcinolone
d) Hydrocortisone
13. After the surgical removal of chronically infected teeth in a controlled diabetic patient, which of the following is of utmost importance:
a) Post operative check of patient for bleeding
b) Return of patient to diet of a normal individual
c) Re-evaluation of insulin dosage being taken by the patient.
d) Medication for marked post operative pain and discomfort
14. A 48 years old diabetic patient wants extraction of 2 teeth which are in grade I mobility. He takes 40 units of NPH insulin daily. Which of the following management procedure in indicated to re-move the teeth:
a) Defer treatment, let him take breakfast, but not insulin to avoid hypoglycemia.
b) Defer treatment, let the patient take his insulin but tell him to avoid breakfast.
c) Treat the patient in the usual manner without much alteration in the diet and drugs
d) Admit the patient in a hospital for the procedure.
15. A patient who is a grand mal epileptic requires emergency extraction. One should:
a) advise the patient that procedure requires admission to the hospital.
b) proceed with extraction using xylocaine without adrenaline.
c) proceed with extraction if anti-convulsive medication is employed by patient.
d) inform the patient that in his condition no extraction should be performed.
16. The blood product of choice for treatment of hemophilic is:
a) fresh blood
b) cryoprecipitate
c) fresh frozen plasma
d) plasma
17. The recommended time interval between the radiation and surgery to avoid Osteoradionecrosis is
a) 4-6 weeks after radiotherapy
b) 6-12 months after radiotherapy
c) Immediately before radiotherapy
d) Any time during the course of radiotherapy
18. An absolute contraindication for extraction of teeth is:
a) hypertension
b) myocardial infarction
c) thyrotoxicosis
d) central hemangioma
19. The antibiotic cover is mandatory before extraction in the following condition of the heart:
a) Ischemic heart disease (IHD)
b) Hypertension
c) Congestive cardiac failure.
d) Congenital heart disease.
20. Drug of choice for parenteral administration in patients allergic to penicillin for prophylaxis against infective endocarditis is?
a) Ciprofloxacin
b) Gentamycin
c) Clindamycin
d) Cefotaxime
28. A 45 years old man who is on dicoumoral therapy requires tooth extraction. His medical history indicated myocardial Infarction two years ago. This patient is receiving anticoagulant drugs. The dentist should:
a) never operate on this patient
b) avoid performing surgery until the anticoagulant had been discontinued for at least three days
c) perform surgery if prothrombin time is 18 seconds.
d) advice vitamin K to avoid post operative haemorrhage
29. Among the following which condition will require specific management prior to emergency extraction?
a) Hemophilia
b) Glaucoma
c) Carcinoma tongue
d) Mixed tumor of parotid
30. A 45 yr old woman insists on extraction of painful mandibular first molar. She has not rested for 2 days and nights because of pain. Her medical history reveals she took 30mg of prednisone daily for one year but stopped taking the medication three months ago. The dentist should:
a) relieve the symptoms by giving antibiotics and analgesics.
b) give steroid supplements and extract the tooth under local anesthesia.
c) avoid procaine anesthetic.
d) extract the tooth under local anesthesia in a usual manner.
31. A patient is under steroid therapy and needs extraction of chronically infected teeth. Premediction includes:
a) Antihypertensive drugs to prevent shock
b) Atropine to prevent cardiac arrest by vagal stimulation
c) Antihistamines
d) Antibiotics
32. Hypoglycemia may occur in a patient taking insulin and undergoing extraction when:
a) extraction is done on empty stomach.
b) patient had an infection
c) patient had no exercise in the morning
d) patient consumed breakfast before extraction
33. Patients with end-stage renal disease are of increased risk when undergoing extraction of teeth because they:
a) have an increased tendency to bleed
b) are susceptible to infections
c) are often on steroid therapy
d) All of the above
34. A patient is on periodic renal dialysis. Minor oral surgery should be performed:
a) one day before dialysis
b) on the day of dialysis
c) one day after dialysis
d) one week after dialysis
35. Incidence of osteoradionecrosis is increased in following cases:
a) Extraction following radiotherapy.
b) Leukaemic patients
c) Patients on hyperbaric oxygen therapy
d) Xerostomia
36. In a patient with maxillofacial injury narcotics like morphine are contraindicated because:
a) Morphine causes myosis
b) Morphine causes mydriasis
c) Morphine is respiratory irritant
d) Morphine is circulatory depressant
