A pyramidal facial disjunction is known as what type of LeFort fracture?

A pyramidal facial disjunction refers to a specific type of LeFort fracture characterized by a fracture that involves the nasal bones and extends down through the maxilla, affecting the orbital floor and zigomatic arch, resulting in a pyramidal shape. This type of fracture is classified as a LeFort II fracture.

The LeFort II fracture is distinctly marked by its involvement of the maxillary region and the structure of the face, which creates a pyramidal configuration due to the nature of the fracture lines radiating from the nasal region. The pattern indicates that the mid-facial skeleton is unstable, leading to displacement of facial structures. This classification helps surgeons and medical professionals understand the extent of facial injury and plan for appropriate surgical intervention.

In contrast, other LeFort types correspond to different fracture patterns and presents varied anatomical implications. For instance, LeFort I fractures are lower facial fractures that primarily involve the maxilla below the nasal bone, while LeFort III fractures typically involve fractures that separate the facial bones from the skull base, resulting in complete disjunction of the facial skeleton. Therefore, the characterization of a pyramidal facial disjunction is specifically recognized as a LeFort II fracture.