Final answer:
A craniofacial disjunction is known as a LeFort III Fracture, which is the most severe type of LeFort fracture. It involves a separation of the midface from the skull base and is typically caused by severe trauma.
Step-by-step explanation:
A craniofacial disjunction is known as a LeFort III Fracture. This type of fracture involves a separation of the midface from the skull base. It typically results from a severe impact to the face, such as in a motor vehicle accident or a fall from a great height. The LeFort III Fracture is considered the most severe of the LeFort fractures, as it involves extensive disruption of the facial skeleton.