Abstract
The purpose of this study was to compare component alignment using two-dimensional (2D) and three-dimensional (3D) measurements following total knee arthroplasty (TKA) with a new robotic system. A total of 38 patients underwent TKA with the robotic system. Cutting errors were measured. Errors in 2D and 3D component alignments from the planned angle, validated cutting angle, and validated implantation angle were calculated. These errors were compared with 2D and 3D measurements. Cutting errors were below 0.6°, except for femoral sagittal angle (1.0°). Errors in component alignment from the planned and cutting angles were significantly higher in 3D measurements than that in 2D measurements, in the femoral coronal and sagittal planes and tibial coronal planes. Errors in component alignments from implantation showed no differences between the measurements. The accuracies of component alignment from the planned and cutting angles were better in 3D measurements.
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