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Fig. 4B —Agility Total Ankle System (DePuy) has been available for use
since 1984, making it longest-used total ankle replacement system in United
States. Agility ankle is porous-coated, two-piece (fixed-bearing) implant with
partially conforming articulation. Modular, concave polyethylene insert
(asterisk) locks into tibial component (thin arrow). Talar
component (thick arrow) articulates with tibial component with
approximately 20° of external rotation. Syndesmotic fusion (double
arrowheads, B) increases surface area of tibial component
prosthesis–bone interface in attempt to resist subsidence while allowing
fibula to share portion of load. Failure of syndesmotic fusion is associated
with increased rate of failure
[8]. Anteroposterior radiograph
of Agility device.
