Surgical navigation has been shown to improve the accuracy of bone preparation and limb alignment in total knee arthroplasty (TKA). Previous work has shown the effectiveness of various types of navigation systems. Here, for the first time, we assessed the accuracy of a novel imageless semiautonomous handheld robotic sculpting system in performing bone resection and preparation in TKA using cadaveric specimens. In this study, we compared the planned and final implant placement in 18 cadaveric specimens undergoing TKA using the new tool. Eight surgeons carried out the procedures using three types of implant designs. A quantitative analysis was performed to determine the translational, angular, and rotational differences between the planned and achieved positions of the implants. The mean femoral flexion, varus/valgus, and rotational error was −2.0°, −0.1°, and −0.5°, respectively. The mean tibial posterior slope, and varus/valgus error was −0.2°, and −0.2°, respectively. We obtained higher flexion errors for the femoral implant when using cut-guides as compared to using a bur for cutting the bones. The image-free robotic sculpting tool achieved accurate implementation of the surgical plan with small errors in implant placement. Future studies will focus on determining how well the accurate implant placement translates into a clinical and functional benefit for the patient.

手术导航已显示可提高全膝关节置换术（TKA）中骨准备和四肢对齐的准确性。先前的工作表明了各种类型的导航系统的有效性。在这里，我们首次评估了新型无图像半自动手持式机器人雕刻系统在使用尸体标本在TKA中进行骨切除和准备的准确性。在这项研究中，我们比较了使用新工具对18个接受TKA的尸体标本的计划植入和最终植入位置。八名外科医生使用三种类型的植入物设计进行了手术。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。平均股骨屈曲，内翻/外翻和旋转误差为-2.0°，分别为-0.1°和-0.5°。胫骨后平均倾斜度和内翻/外翻误差分别为-0.2°和-0.2°。与使用bur切割骨头相比，使用切割导向器时股骨植入物的弯曲误差更高。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。未来的研究将集中于确定准确的植入物植入对患者的临床和功能益处的程度。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。未来的研究将集中于确定准确的植入物植入对患者的临床和功能益处的程度。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。未来的研究将集中于确定准确的植入物植入对患者的临床和功能益处的程度。