This document discusses the classification of Lefort fractures of the maxilla. It describes the Lefort I, II, and III classifications originally proposed by Rene Lefort in 1901 based on the level of injury. It also discusses modifications to the Lefort classification by Marciani in 1993. The document provides details on the characteristics, signs and symptoms, examination, investigations, and treatment including manual/closed reduction and internal or external fixation options for Lefort fractures.