INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the classification of a mandibular fracture that is closed to the oral cavity?

  1. Simple

  2. Compound

  3. Open Reduction

  4. LeFort I

The correct answer is: Simple

A closed mandibular fracture refers to a fracture that does not communicate with the oral cavity. This type of fracture is classified as a simple fracture because it does not involve the external environment or the soft tissues inside the oral cavity. Compound fractures, on the other hand, are fractures in which the broken bone is exposed to the external environment through an open wound in the skin. Open reduction refers to a surgical procedure where the fractured bone is repositioned under direct visualization. LeFort I fractures are specific to the maxilla and involve horizontal fractures through the maxilla, separating the upper jaw from the rest of the skull.