The motion between components in a mobile-bearing total ankle replacement measured by cone-beam CT scanning
: Koivu Helka, Kormi Sami, Kohonen Ia, Tiusanen Hannu
Publisher: Elsevier Ltd
: 2022
: Foot and Ankle Surgery
: Foot and Ankle Surgery
: 28
: 324
: 330
: 1460-9584
DOI: https://doi.org/10.1016/j.fas.2021.04.002
Background
To
measure the motion of polyethylene insert and implant components of
mobile-bearing total ankle replacement (TAR) by cone-beam CT scanning.
10
TAR patients with high amount of clinical motion after the CCI implant
(Ceramic Coated Implant; Wright Medical Technology, Arlington, TN, USA)
with average age at operation 64,3 years (range 47–84) and average
clinical total range of motion 42 degrees (range 35–55) were included.
The average total range of motion between the insert and the tibial component was 0.8 mm (range 0–2) in the coronal plane, and 2.9 mm (range 1–6) in the sagittal plane. There was wide variation in the axial rotation measurements between the components.
ConclusionWe
found measurable motion between the mobile-bearing insert and the
tibial component in all planes. The relevance of this motion to the
function and long-term survival of the TAR remains to be determined.
