5 Written questions
5 Matching questions
- what are the most common complications of orbital floor repair
- What is shown in a Water's view film?
- When do fibrillation potentials appear in Wallerian degeneration?
- arterial supply to the mandible
- Absolute and relative indications for open reduction of subcondylar fx
- a external carotid-->internal maxillary-->inferior alveolar
- b diploplia and enopthalmos
- c Absolute
1. Dislocation into middle cranial fossa
2. Lateral extracapsular displacement
3. Inability to obtain adequate occlusion with closed reduction
4. Open joint with foreign body
1. Bilateral subcondylar fx's in edentulous patient (splinting impossible)
2. When splinting not recommended for medical reasons
3. Bilateral fractures associated with comminuted midfacial fractures
- d Associated fibrillation potentials show up starting 3 days after injury.
upper 2/3 of facial bones, maxillary sinuses
5 Multiple choice questions
- Obliteration vs. close monitoring with CT scans (in reliable patient only).
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.
- An imaginary line drawn at the canines
- 1. isolated nondisplaced fractures of the coronoid
2. unilateral nondisplaced subcondylar fracture with normal occlusion
- 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.
5 True/False questions
Best radiologic view of subcondylar fx →
Some say panorex for subcondylar. Otherwise, Towne's view.
What are class II and III occlusion? → external carotid-->internal maxillary-->inferior alveolar
how do you treat frostbite of the ear? → external carotid-->internal maxillary-->inferior alveolar
How often do isolated fractures of a single site in the mandible occur? → 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
types of other fractures most often associated with a mandibular condyle fracture → symphysis and condyle of contralateral side