Abstract
Robotic-assisted technology in total knee arthroplasty (TKA) aims to increase implantation
accuracy, with real-time data being used to estimate intraoperative component alignment.
Postoperatively, Perth computed tomography (CT) protocol is a valid measurement technique
in determining both femoral and tibial component alignments. The aim of this study
was to evaluate the accuracy of intraoperative component alignment by robotic-assisted
TKA through CT validation. A total of 33 patients underwent TKA using the MAKO robotic-assisted
TKA system. Intraoperative measurements of both femoral and tibial component placements,
as well as limb alignment as determined by the MAKO software were recorded. Independent
postoperative Perth CT protocol was obtained (n = 29) and compared with intraoperative values. Mean absolute difference between intraoperative
and postoperative measurements for the femoral component were 1.17 degrees (1.10)
in the coronal plane, 1.79 degrees (1.12) in the sagittal plane, and 1.90 degrees
(1.88) in the transverse plane. Mean absolute difference between intraoperative and
postoperative measurements for the tibial component were 1.03 degrees (0.76) in the
coronal plane and 1.78 degrees (1.20) in the sagittal plane. Mean absolute difference
of limb alignment was 1.29 degrees (1.25), with 93.10% of measurements ≤3 degrees
of postoperative CT measurements. Overall, intraoperatively measured component alignment
as estimated by the MAKO robotic-assisted TKA system is comparable to CT-based measurements.
Keywords
intraoperative measurements - robotic-assisted TKA surgery - computed tomography scan
- total knee arthroplasty - limb alignment
