Practice Test GeeksNBDE - National Board Dental Examination Practice Test
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Part II Flashcards

7 cards from real NBDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Part II flashcards as text

  1. A patient presents with a periapical abscess on tooth #19. After incision and drainage, the most appropriate antibiotic of choice in a non-penicillin-allergic patient is:

    Answer: Amoxicillin 500mg TID x 7 days

    Amoxicillin is the first-line antibiotic for odontogenic infections in non-penicillin-allergic patients due to its broad-spectrum coverage of oral flora.

  2. During a class II amalgam preparation, which wall provides the most resistance to occlusal loading?

    Answer: Pulpal floor

    The pulpal floor provides the primary resistance form by being perpendicular to the long axis of the tooth and distributing occlusal forces.

  3. A 7-year-old child has avulsed tooth #8 (maxillary right central incisor, permanent). The tooth has been extraoral for 90 minutes in a dry environment. The best management is:

    Answer: Do not replant; space maintenance only

    Teeth with a dry extraoral time exceeding 60 minutes have non-viable periodontal ligament cells, and replantation is not recommended due to inevitable ankylosis and root resorption.

  4. Which local anesthetic has the longest duration of action and is commonly used for prolonged surgical procedures?

    Answer: Bupivacaine 0.5%

    Bupivacaine 0.5% provides up to 8–12 hours of pulpal anesthesia, making it ideal for lengthy oral surgical procedures and postoperative pain control.

  5. In periodontal disease classification, Stage III Grade C periodontitis is characterized by:

    Answer: Severe bone loss with rapid progression and significant risk factors like smoking or diabetes

    Grade C indicates rapid rate of progression and/or specific risk factors (e.g., smoking ≥10 cigarettes/day or HbA1c ≥7%), combined with Stage III's severe complexity factors.

  6. Which of the following best describes the 'critical pH' for enamel demineralization?

    Answer: pH 5.5

    Enamel begins to demineralize at pH 5.5 because this is the point at which saliva becomes undersaturated with respect to hydroxyapatite.

  7. A patient undergoing extraction develops sudden onset of extreme pain 3–4 days post-operatively with an empty socket and exposed bone. The most likely diagnosis is:

    Answer: Alveolar osteitis (dry socket)

    Alveolar osteitis (dry socket) presents 3–5 days post-extraction with loss of the blood clot, exposed alveolar bone, and severe radiating pain.