Fractures of the sustentaculum tali: injury characteristics and surgical technique for reduction.
BACKGROUND
The sustentaculum tali of the calcaneus is a vital load-bearing structure. Isolated sustentacular fractures are rare and may have implications for future hindfoot function. This retrospective cohort study describes sustentacular fracture patterns and characteristics, associated foot injuries, and a method of surgical treatment via a medial approach to the calcaneus.


METHODS
During a 7-year period, 19 surgically-treated sustentacular fractures without calcaneal posterior facet involvement were identified from a prospectively-collected database at a single Level 1 regional trauma center. Of these, 15 underwent open reduction and internal fixation utilizing a medial approach to the calcaneus. Patient charts, plain radiographs, and CT scans were reviewed for injury characteristics/morphology and associated musculoskeletal injuries.


RESULTS
Fourteen patients had associated ipsilateral foot/ankle injuries, and nine had other musculoskeletal injuries. Seven patients had intra-articular middle facet involvement, and seven had subtalar joint subluxation or dislocation. The medial approach to the calcaneus involves distal retraction of the neurovascular bundle and toe flexors. This allowed for an accurate indirect articular reduction using the extraarticular medial calcaneal cortex, as well as reduction of any associated subluxations. No complications were related to the surgical approach. Reduction was maintained through fracture healing.


CONCLUSIONS
Fractures of the sustentaculum tali are rare injuries associated with high energy mechanisms, and associated ipsilateral foot injuries are common. Open reduction and internal fixation of these fractures was reliable and possible through a medial approach involving distal retraction of the digital flexors and neurovascular bundle, allowing for an anatomical extraarticular cortical reduction.
Della Rocca
Gregory J
GJ
University of Missouri-Columbia, Orthopaedic Surgery, Columbia, MO 65212, USA. dellaroccag@health.missouri.edu
Nork
Sean E
SE
Barei
David P
DP
Taitsman
Lisa A
LA
Benirschke
Stephen K
SK
D000063:Accidents, Traffic / Q000706:statistics & numerical data; D000293:Adolescent; D000328:Adult; D002111:Calcaneus / Q000000981:diagnostic imaging / Q000293:injuries* / Q000601:surgery*; D005260:Female; D005593:Fracture Fixation, Internal / Q000379:methods*; D050723:Fractures, Bone / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D013628:Talus / Q000293:injuries; D055815:Young Adult