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. 2021 Jul 21;8:52. doi: 10.1186/s40634-021-00374-7

Fig. 3.

Fig. 3

The Knee + system enables the surgeon to view the tibia (A) and femur (B) mechanical axis (blue line) superimposed on the tibia and femur on surgical field. In yellow circles, it has been indicated the coronal and sagittal alignment of cutting guide