5 Written questions
5 Matching questions
- Long-term complications of orbital blow out
- How often do isolated fractures of a single site in the mandible occur?
- What is shown in a submental vertex view film?
- Ideal time for nasal fracture reduction
- Describe Champy lines of osteosynthesis.
- a enophthalmos, dipoloplia, infraorbital nerve hypesthesia
- c 6%
- d within 3 hours of injury or from 3-7 days.
"ideal lines of osteosynthesis" across the mandibular angle where the compressive and tensile forces from mastication can be countered with only monocortical fixation
5 Multiple choice questions
- symphysis and condyle of contralateral side
- Obliteration vs. close monitoring with CT scans (in reliable patient only).
- 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.
Class II: retrognathism
Class III: prognathism
- 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
5 True/False questions
Types of mandible fractures that require treatment with soft diet only (no MMF or ORIF) → symphysis and condyle of contralateral side
what are the most common complications of orbital floor repair → enophthalmos, dipoloplia, infraorbital nerve hypesthesia
Absolute and relative indications for open reduction of subcondylar fx →
Some say panorex for subcondylar. Otherwise, Towne's view.
Most likely long term outcome from conservative management of orbital blowout fracture (all-comers)? → Cheek hypesthesia. Enopthalmos likely if >50% of floor.
Describe the direction of force on the mandible for each muscle:
2. Lateral pterygoid
3. Medial pterygoid
6. Digastric →
1. Temporalis pulls coronoid posterosuperiorly.
2. Lateral pterygoid pulls condyle anteroinferiorly.
3 & 4. Masseter & medial pterygoid pull the angle anterosuperiorly.
5 & 6. Geniohyoid and digastric pull mentum inferoposteriorly.