The Danis–Weber classification was first described by Robert Danis (1880-1962), a Belgian general surgeon, in 1949.
It was modified by Bernhard Georg Weber (1929-2002), a Swiss orthopedic surgeon, in 1972.
Stage 1 - Tension on the lateral collateral ligaments cause
the rupture of the ligaments
or
avulsion of the lateral malleolus below the syndesmosis.
Stage 2 - Oblique fracture of the medial malleolus.
B
Usually spiral
Distal extent at the level of the talar dome
Tibiofibular syndesmosis usually is intact
Deltoid ligament may be injured
Medial malleolus maybe fractured
Variable stability dependening on the medial structures
May require ORIF
Stage 1 - Rupture of the anterior syndesmosis
Stage 2 - Oblique fracture of the fibula (the true Weber B fracture)
Stage 3 - Rupture of the posterior syndesmosis or - fracture of the posterior malleolus
Stage 4 - Avulsion of the medial malleolus or - rupture of the medial collateral bands
C
Above the level of the ankle joint
Tibiofibular syndesmosis is injured
Deltoid ligament is injured
Medial malleolus maybe fractured
Fracture may arise as proximally as the level of fibular neck and not visualized on ankle films, requiring knee or full-length tibia-fibula radiographs (Maisonneuve fracture)
Unstable:
Usually requires ORIF
Stage 1 - Avulsion of the medial malleolus or - ligamentous rupture
Stage 2 - Rupture of the anterior syndesmosis
Stage 3 - Fibula fracture above the level of the syndesmosis (this is the true Weber C fracture)
Stage 4 - Avulsion of the posterior malleolus or - rupture of the posterior syndesmosis
↑Juto H, Möller M, Wennergren D, Edin K, Apelqvist I, Morberg P (November 2016). "Substantial accuracy of fracture classification in the Swedish Fracture Register: Evaluation of AO/OTA-classification in 152 ankle fractures". Injury. 47 (11): 2579–2583. doi:10.1016/j.injury.2016.05.028. PMID27645617.
↑Boszczyk A, Fudalej M, Kwapisz S, Klimek U, Maksymowicz M, Kordasiewicz B, Rammelt S (January 2018). "Ankle fracture - Correlation of Lauge-Hansen classification and patient reported fracture mechanism". Forensic Sci. Int. 282: 94–100. doi:10.1016/j.forsciint.2017.11.023. PMID29182957.
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