Abstract
BackgroundThis pilot study was performed to examine the accuracy of the AR-KNEE system, an imageless navigation system using augmented reality (AR) technology for total knee arthroplasty. The AR-KNEE system enables the surgeon to view information from the navigation superimposed on the surgical field on a smartphone screen in real time.MethodsUsing the AR-KNEE system, one surgeon resected 10 tibial sawbones with viewing the tibial axis and aiming varus/valgus, posterior slope, internal/external rotation angles, and resection level superimposed on the surgical field. We performed computed tomography of the resected sawbones and measured the varus/valgus, posterior slope, and internal/external rotation angles using a designated computer software. The thickness of the resected bone was measured using digital calipers.ResultsThe absolute differences between the values displayed on the smartphone screen and the measurement values for varus/valgus, posterior slope, internal/external rotation angles, and thickness of the resected bone were 0.5° ± 0.2°, 0.8° ± 0.9°, 1.8° ± 1.5°, and 0.6 mm ± 0.7 mm, respectively.ConclusionsThis pilot study using sawbones suggested that the AR-KNEE system may provide reliable accuracy for coronal, sagittal, and rotational alignment in tibial bone resection during total knee arthroplasty.
Highlights
This pilot study was performed to examine the accuracy of the AR-KNEE system, an imageless navigation system using augmented reality (AR) technology for total knee arthroplasty
For total knee arthroplasty (TKA), we developed an AR-based navigation system (AR-KNEE system) that was applied to tibial bone resection
There were no significant differences between the angles displayed on the smartphone screen and the measurement angles determined using computed tomography (CT) (P = 0.27, 0.06, and 0.10 in varus/valgus, posterior slope, and rotation angle, respectively)
Summary
This pilot study was performed to examine the accuracy of the AR-KNEE system, an imageless navigation system using augmented reality (AR) technology for total knee arthroplasty. The AR-KNEE system enables the surgeon to view information from the navigation superimposed on the surgical field on a smartphone screen in real time. The need for the surgeon to take their eyes off the surgical field to view the monitor is another issue that must be addressed in the further development of computer navigation. In total hip arthroplasty (THA), Ogawa et al developed a novel navigation system using augmented reality (AR) technology, in which the surgeon uses a free application installed on a smartphone (Ogawa et al 2018). AR-based navigation allows the surgeon to view the. The AR technology allows the surgeon to view these angles as reference lines superimposed on the real surgical field on the smartphone display
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