The anteromedial facet of the coronoid process of the ulna

Fractures of the coronoid: morphology based upon computer tomography scanning

“…The ''anterolateral'' type fractures (type 4 AL) were those with obliquity involving the anterolateral portion of the coronoid and the lesser sigmoid notch. The anteromedial fracture pattern has previously been delineated by O'Driscoll et al, with particular attention to the loss of the buttressing effect and the effect upon stability of the elbow joint 15,28 ; however, a large number of anterolateral fractures were also noted in this series (Table I). 9 Simple obliquity of the fracture pattern was not sufficient to be included in 1 of the 2 oblique classification patterns; a requirement was made that these fractures include either the lesser sigmoid notch (anterolateral fracture) or the sublime tubercle (anteromedial fracture), but not both, as such cases would represent a type 3 ''basal'' fracture.…”

“…1,2,25,26,[30][31][32] This is likely related to outcomes series documenting treatment and status of these injuries, and also due in large part to a better understanding of the implications of fracture patterns upon stability from biomechanical studies as well as improvement in both technology and access to axial imaging. 4,6,8,[10][11][12][15][16][17][18][19]21,29,34 For several decades, our understanding of coronoid fractures and the implication of these fractures upon stability of the elbow has been largely based upon a classification system according to findings on lateral plain film radiographs. 31 At our institution, Regan and Morrey 31 described findings in 37 fractures and developed a simple classification system based upon the lateral x-ray view.…”

Medial Elbow Exposure for Coronoid Fractures

“…18 Doornberg et al 19 only recently illustrated the relatively vulnerable protrusion of the coronoid's anteromedial facet, concluding that a separate medial exposure is most often required to stabilize this important structure in varus posteromedial rotatory injuries.…”

Treatment of complex elbow fracture-dislocations

“…The anteromedial coronoid may be prone to injury because approximately 58 % is unsupported by the proximal ulna [23]. Fractures of the anteromedial coronoid are theorized to occur from a varus posteromedial rotatory injury force [24].…”