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Oral Surgery: INBDE study notes and practice questions

Oral surgery questions test principles of safe extraction and flap design, how to prevent and manage complications, and how to recognize serious infections and facial trauma.

489 practice questions · 10 patient cases

Practice Oral Surgery

Where it fits in the official INBDE blueprint

Oral Health Management (oral surgical procedures). Nearest foundation knowledge areas: FK 6, FK 7. See the content outline for the official weights. This mapping is approximate: real items combine a clinical area with a foundation area.

What this area tests

High-yield checklist

Common traps

These notes are original study aids, not official exam content. Confirm clinical details against current guidelines.

Sample questions

1. Regarding alveolar osteitis (dry socket), which of the following statements is NOT true?

  1. Oral contraceptives can increase the risk
  2. It is caused by increased fibrinolytic activity that dissolves the blood clot
  3. The exact cause is always easily identified
  4. Smoking is a significant risk factor
Show answer and explanation

Correct answer: C. The exact cause is always easily identified

Alveolar osteitis results from premature dissolution of the post-extraction blood clot, likely through fibrinolysis, which exposes the underlying alveolar bone to oral bacteria and debris. Risk factors include smoking, oral contraceptive use (estrogen increases fibrinolytic activity), difficult extractions, mandibular posterior teeth, poor oral hygiene, and pre-existing infection. The exact etiology is multifactorial and is NOT always easily identified in every case — multiple predisposing factors interact, making a single definitive cause difficult to pinpoint. Oral contraceptives and fibrinolysis are both established associations.

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2. Regarding proper extraction forceps technique, which statement is NOT true?

  1. Forceps are used to grab only the crown of the tooth
  2. Forceps should be positioned as apically as possible along the root for better mechanical advantage
  3. Proper forceps technique contributes to controlled luxation of the tooth
  4. Forceps beak adaptation to the tooth's anatomy matters for technique success
Show answer and explanation

Correct answer: A. Forceps are used to grab only the crown of the tooth

Proper forceps technique involves positioning the forceps beaks as far APICALLY as possible along the root (not merely grasping the crown alone), maximizing mechanical advantage for controlled luxation — describing forceps as being used 'to grab the crown' only is an incomplete and technically inaccurate description of proper technique.

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3. A patient presents with alveolar osteitis (dry socket) following a mandibular extraction. What is the most appropriate treatment?

  1. Irrigate the socket with saline and place a zinc oxide-eugenol (ZOE) dressing
  2. Debridement and systemic antibiotic therapy
  3. Curettage and primary closure
  4. Prescription of analgesics only
Show answer and explanation

Correct answer: A. Irrigate the socket with saline and place a zinc oxide-eugenol (ZOE) dressing

Alveolar osteitis (dry socket) is managed by gentle irrigation of the socket with saline or chlorhexidine to remove debris, followed by placement of a medicated dressing such as zinc oxide-eugenol (ZOE)-based dressing (e.g., Alvogyl) into the socket. This provides analgesic, anti-inflammatory, and mild antiseptic effects, typically bringing pain relief within 24 hours. The dressing is changed every 1–3 days until symptoms resolve. Antibiotics are not routinely indicated as dry socket is not a true infection but a localized inflammatory condition due to fibrinolysis. Curettage and primary closure are not appropriate as they risk disturbing healing.

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4. Which of the following statements about alveolar osteitis (dry socket) is NOT accurate?

  1. It is more common following mandibular molar extractions
  2. Use of oral contraceptives increases the risk
  3. The etiology is simple with a single well-established cause
  4. Treatment involves gentle irrigation and medicated dressing placement
Show answer and explanation

Correct answer: C. The etiology is simple with a single well-established cause

Alveolar osteitis (dry socket) is a multifactorial complication following tooth extraction characterized by premature loss of the blood clot from the socket. Its etiology involves multiple factors: excessive fibrinolysis (possibly bacteria-induced), surgical trauma, poor blood supply, smoking, oral contraceptives (elevated estrogen enhances fibrinolysis), poor oral hygiene, impacted mandibular third molar extractions, and pre-existing infection. There is NO single, easily identified cause — this is a false statement about alveolar osteitis. The incidence is approximately 2–5% for routine extractions and up to 20% for mandibular third molars. Treatment includes copious saline irrigation and placement of an analgesic medicated dressing (e.g., iodoform gauze with eugenol-based paste).

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5. Each of the following measures can help minimize fractures of the maxillary alveolar process during dental extractions EXCEPT one. Which is the EXCEPTION?

  1. Use of controlled force when applying forceps and elevators
  2. Removal of buccal bone and/or sectioning of teeth prior to extraction
  3. Thorough presurgical analysis and modifications to the surgical approach
  4. Use of forceps with beaks that grasp roots more firmly
Show answer and explanation

Correct answer: D. Use of forceps with beaks that grasp roots more firmly

All of the other options (controlled force, bone removal/sectioning, presurgical analysis, and the maxillary pinch grasp) are recognized measures to MINIMIZE alveolar fractures during extraction. The maxillary pinch grasp, where the index finger is placed buccally and thumb palatally, allows the surgeon to detect alveolar bone expansion and stop force before fracture occurs — it is a protective technique. Using forceps with beaks designed to grasp roots more firmly is the EXCEPTION because excessive grip force and uncontrolled force application through firmer-gripping forceps actually INCREASES the risk of alveolar fracture. The key principle is controlled, measured force — not maximizing grip on the root.

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6. A tooth with hypercementosis (bulbous root enlargement) would have INCREASED procedural complications with all of the following EXCEPT:

  1. Scaling and root planing
  2. Orthodontic tooth movement
  3. Extraction
  4. Root canal therapy
Show answer and explanation

Correct answer: A. Scaling and root planing

Hypercementosis's irregular, bulbous root shape can make orthodontic tooth movement less predictable, extraction more technically difficult (increased risk of root fracture given the altered, sometimes locked-in root anatomy), and root canal therapy more complex (a wider, irregular root form). Scaling and root planing, a non-surgical periodontal procedure focused on the tooth's exposed surface/pocket area rather than root manipulation or removal, is not directly complicated by hypercementosis in the same way.

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7. The most commonly used surgical procedure to correct maxillary retrognathia is:

  1. C-osteotomy
  2. Le Fort I osteotomy
  3. Inverted L-osteotomy
  4. Anterior maxillary osteotomy
Show answer and explanation

Correct answer: B. Le Fort I osteotomy

Le Fort I osteotomy is the gold standard for advancing a retruded maxilla u2014 it separates the entire maxilla at the Le Fort I level and allows repositioning in any direction. C-osteotomy and inverted L-osteotomy are mandibular procedures.

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8. To anesthetize tooth #2 (upper right third molar), which nerve block is used?

  1. Posterior Superior Alveolar (PSA) nerve block
  2. Middle Superior Alveolar (MSA) nerve block
  3. Infraorbital nerve block
  4. Anterior Superior Alveolar (ASA) nerve block
Show answer and explanation

Correct answer: A. Posterior Superior Alveolar (PSA) nerve block

✓ A) PSA (Posterior Superior Alveolar) nerve block is correct.
The PSA nerve innervates: maxillary molars (#1, 2, 3, 14, 15, 16) — except the mesiobuccal root of #3 and #14 (which may be innervated by the MSA nerve in ~28% of patients). For tooth #2 (upper right third molar), the PSA nerve block is the primary anesthetic technique. The injection is made posterior to the maxillary tuberosity at a 45° angle upward, inward, and backward. This provides pulpal and periodontal anesthesia for the maxillary third and second molars.

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Patient cases

All Oral Surgery questions (489)