title: [Double measurement of the Böhler angle: prognostic value of radiological angles in posterior facet fractures of the calcaneus].
abstract: In 1931, Böhler proposed that measuring the radiological angle of the tuberosity could be useful in posterior facet fractures of the calcaneus to evaluate initial damage as well as reduction quality. In opposition to the 1998 SOFCOT symposium, certain authors considered that the Böhler angle has no prognostic value. Progress in pathological anatomy has helped to better understand posterior facet fractures, justifying the use of a "double measurement". The fundamental fracture line separates the posterior facet into a lowered medial fragment and a pivoted lateral fragment. The double contour of the posterior facet visualized radiographically allows measurement of a medial Böhler angle and a lateral Böhler angle. It is demonstrated that is the smaller the medial Böhler angle, the greater the subtalar degeneration. Surgical restoration of a satisfactory Böhler angle is a necessary prerequisite for a good outcome. "Double measurement" of the Böhler angle on the lateral view contributes to the prognostic value of this historical angle.
authors.affiliation: Chirurgie Orthopédique et Traumatologique, CHU Rangueil, 1, avenue Professeur Jean-Poulhès, 31403 Toulouse Cedex 04, France.
authors.forename: B
authors.initials: B
authors.lastname: Chaminade
authors.forename: S
authors.initials: S
authors.lastname: Zographos
authors.forename: G
authors.initials: G
authors.lastname: Uthéza
mesh_terms: D002111:Calcaneus / Q000000981:diagnostic imaging* / Q000293:injuries*; D050723:Fractures, Bone / Q000000981:diagnostic imaging*; D006801:Humans; D016011:Normal Distribution; D011379:Prognosis; D011859:Radiography