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5 Written Questions

5 Matching Questions

  1. Most likely long term outcome from conservative management of orbital blowout fracture (all-comers)?
  2. What is shown in a submental vertex view film?
  3. Describe Champy lines of osteosynthesis.
  4. types of other fractures most often associated with a mandibular condyle fracture
  5. Ideal time for nasal fracture reduction
  1. a within 3 hours of injury or from 3-7 days.
  2. b symphysis and condyle of contralateral side
  3. c Cheek hypesthesia. Enopthalmos likely if >50% of floor.
  4. d
    "ideal lines of osteosynthesis" across the mandibular angle where the compressive and tensile forces from mastication can be countered with only monocortical fixation
  5. e
    zygomas

5 Multiple Choice Questions

  1. diploplia and enopthalmos
  2. Obliteration vs. close monitoring with CT scans (in reliable patient only).
  3. 6%
  4. If no displacement or e/o CFS leak, observe and give abx. If displaced, obliteration and possible repair of dural tear. Cranialization reserved for fracture with significant bone loss or comminution.
  5. external carotid-->internal maxillary-->inferior alveolar

5 True/False Questions

  1. which way does the lateral pterygoid tend to displace the condylar headanterior and medial

          

  2. Best radiologic view of subcondylar fx
    "ideal lines of osteosynthesis" across the mandibular angle where the compressive and tensile forces from mastication can be countered with only monocortical fixation

          

  3. how do you treat frostbite of the ear?rapid rewarming in circulating water. avoid rubbing and dry heat as both of these predispose to liquefactive necrosis. surgical debridement not indicated for 3 weeks for final demarcation of injury

          

  4. When do fibrillation potentials appear in Wallerian degeneration?within 3 hours of injury or from 3-7 days.

          

  5. Describe the direction of force on the mandible for each muscle:

    1. Temporalis
    2. Lateral pterygoid
    3. Medial pterygoid
    4. Masseter
    5. Geniohyoid
    6. Digastric
    Usually involve the body and sympysis-parasymphysis areas.

    The fracture line is posterior on the lateral cortex and anterior on the medial cortex. Therefore, the portion of the mandible posterior to the fracture is pulled medially, displacing the fracture. The mylohyoid is the primary muscle displacing the fracture.

          

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