Outcome after 52 Salto Ankle Prostheses Implanted by a Single Surgeon

Figure 1

Radiological angles. Perfect tibial position is defined as γ angle 90 degrees and in the sagittal plane position of the tibial component with an inclination till 7 degrees (α = +7; according to the manufacturer of the Salto prosthesis). Perfect talar position is placement of this component parallel to the sole of the foot (β angle 0 degrees). An angle-difference over time of 5 degrees or more is considered significant and is classified as migration. Malposition is defined as an angulation of a component of more than 10 degrees from the perfect position as defined by Schimmel [7].