system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Lefort-II fracture involves all of the following bones, except:
assistant
The correct answer is  Guerin fracture is other name for Le Fort I or low level fracture.
Le Fort II involves maxilla, nasal, lacrimal bones.
Le Fort III involves maxilla, lacrimal, nasal and ethmoidal bones.