- if secondary frx line travels parallel w/ plantar aspect of foot, exiting at posterior border of the calcaneus, tounge frx will develop;
- secondary fracture line extends posteriorly from superior part of primary frx line (at crucial angle), creating 1 single posterior, superior, & lateral fragment;
- hence, the coronal fracture occurs posterior to the tuberosity;
- sustenacular fragment: - contains medial aspect of posterior articlar fragment
- tounge fragment: contains tuberosity & lateral aspect of posterior articular fragment
- inferior portion of body of the calcaneus;
- fragmenation of the lateral wall is often mild;
- comminution anterior to the Angle of Gissane will often be severe;
- tongue fracture fragment will include portion of achilles tendon;
- with displacement of tongue fragment there will be excessive tension on the posterior skin which can lead to necrosis
Pathoantomy of intra-articular articular fractures of the calcaneus.
The Essex-Lopresti reduction for calcaneal fractures revisited
Secondary soft tissue compromise in tongue-type calcaneus fractures
Late sequelae of secondary Haglund's deformity after malunion of tongue type calcaneal fracture: report of two cases.
Congruity of the subtalar joint in tongue fracture of the calcaneus: an anatomical study.