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High degree of accuracy of a novel image free handheld robot for unicondylar knee arthroplasty in a cadaveric study

机译：尸体研究中用于un突膝关节置换术的新型无图像手持式机器人的高精度

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Surgical robotics has been shown to improve the accuracy of bone preparation and soft tissue balance in unicondylar knee arthroplasty (UKA). However, although extensive data have emerged with regard to a CT scan-based haptically constrained robotic arm, little is known about the accuracy of a newer alternative, an imageless robotic system. We assessed the accuracy of a novel imageless semiautonomous freehand robotic sculpting system in performing bone resection and preparation in UKA using cadaveric specimens. In this controlled study, we compared the planned and final implant placement in 25 cadaveric specimens undergoing UKA using the new tool. A quantitative analysis was performed to determine the translational, angular, and rotational differences between the planned and achieved positions of the implants. The femoral implant rotational mean error was 1.04° to 1.88° and mean translational error was 0.72 to 1.29 mm across the three planes. The tibial implant rotational mean error was 1.48° to 1.98° and the mean translational error was 0.79 to 1.27 mm across the three planes. The image-free robotic sculpting tool achieved accurate implementation of the surgical plan with small errors in implant placement. The next step will be to determine whether accurate implant placement translates into a clinical and functional benefit for the patient.
机译：手术机器人已被证明可以改善单icon膝关节置换术（UKA）中骨制备的准确性和软组织平衡。但是，尽管关于基于CT扫描的受触觉约束的机械手已经出现了广泛的数据，但对于一种新型的无图像机器人系统的准确性知之甚少。我们评估了新型无图像半自动手绘机器人雕刻系统在使用尸体标本在UKA中进行骨切除和准备的准确性。在这项对照研究中，我们比较了使用新工具在接受UKA的25具尸体标本中计划和最终植入的位置。进行了定量分析，以确定植入物的计划位置和已实现位置之间的平移，角度和旋转差异。整个三个平面的股骨植入物旋转平均误差为1.04°至1.88°，平均平移误差为0.72至1.29 mm。胫骨植入物的旋转平均误差在三个平面上为1.48°至1.98°，平均平移误差为0.79至1.27 mm。无图像的机器人雕刻工具实现了手术计划的准确实施，并且植入物放置中的误差很小。下一步将是确定正确的植入物放置是否会转化为患者的临床和功能益处。

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