Fig. 2. Bartonicek and Rammelt classification of the posterior malleolar fracture. (A) Type 1, extraincisural fragment with an intact fibular notch. (B) Type 2, posterolateral fragment extending into the fibular notch. (C) Type 3, posteromedial two-part fragment involving the medial malleolus. (D) Type 4, large posterolateral triangular fragment involving more than one-third of the notch. Type 5 is used to describe an irregular osteoporotic fracture that does not match of the any other 4 patterns.
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