INBDE (Integrated National Board Dental Examination) Practice Exam

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Which fracture is categorized as a pyramidal fracture across the midface?

LeFort I
LeFort III
LeFort II
Simple

The correct answer is: LeFort II

A pyramidal fracture across the midface is characterized by a fracture line that runs along the sides of the nose, through the eye sockets, and behind the cheeks. This type of fracture is most commonly associated with LeFort II fractures, also known as the "floating face" or "floating palate" fracture. It is incorrect to choose LeFort I, as this type of fracture involves a horizontal fracture across the maxilla/nasal bone. LeFort III fractures are also known as the "craniofacial dissociation" fracture and involve severe facial trauma, which does not fit the description of a pyramidal fracture. "Simple" fractures are not specific and can refer to various types of bone fractures, making it an incorrect choice as well.