Final answer:
A transverse horizontal maxillary alveolar fracture, or palate facial disjunction (Guerin), is known as a LeFort I fracture.
Step-by-step explanation:
A transverse horizontal maxillary alveolar fracture, or palate facial disjunction (Guerin), is known as a LeFort I fracture. This type of fracture involves a complete separation of the maxilla from the cranial base, leading to a horizontal fracture line that extends through the maxilla, separating it from the palate and the rest of the facial bones. It is typically caused by a significant impact to the face, such as a motor vehicle accident or a fall.