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Article

Bone Cuts Accuracy of a System for Total Knee Arthroplasty including an Active Robotic Arm

1
Swiss BioMotion Lab, Department of Musculoskeletal Medicine, Lausanne University Hospital and University of Lausanne (CHUV-UNIL), CH-1011 Lausanne, Switzerland
2
Service of Diagnostic and Interventional Radiology, Lausanne University Hospital and University of Lausanne (CHUV-UNIL), CH-1011 Lausanne, Switzerland
3
Institute of Microengineering, Ecole Polytechnique Fédérale Lausanne (EPFL), CH-1015 Lausanne, Switzerland
*
Author to whom correspondence should be addressed.
Academic Editor: Victor Valderrabano
J. Clin. Med. 2021, 10(16), 3714; https://doi.org/10.3390/jcm10163714
Received: 2 July 2021 / Revised: 18 August 2021 / Accepted: 19 August 2021 / Published: 20 August 2021
(This article belongs to the Section Orthopedics)
Introduction: This study aimed to assess the bone cuts accuracy of a system for total knee arthroplasty including an active robotic arm. A second objective was to compare the accuracy among orthopaedic surgeons of different levels of experience. Methods: Three orthopaedic surgeons cut 10 sawbone knees each. Planned and actual bone cuts were compared using computed tomography. Difference with respect to the planning was expressed as three position and three orientation errors following the anatomical planes. Statistical tests were performed to detect bias and compare surgeons. Results: None of the 30 knees presented an outlier error, meaning an error ≥3 mm or ≥3°. The root-mean-square values of the 12 error types were below 0.8 mm or 0.8°, except for the femoral proximal–distal errors (1.7 mm) and the tibial anterior-posterior errors (1.4 mm). Biases were observed, particularly in femoral proximal–distal and tibial anterior–posterior positions. Median differences between surgeons were all lower than 0.8 mm and 0.5°, with statistically significant differences among surgeons in the femoral proximal–distal errors and the tibial anterior–posterior errors. Conclusions: The system tested in this study achieved accurate bone cuts independently of the surgeon’s level of experience. Biases were observed, suggesting that there might be options to improve the accuracy, particularly in proximal–distal position for the femur and in anterior–posterior position for the tibia. View Full-Text
Keywords: total knee arthroplasty; robotic-assisted surgery; position and orientation error; registration; level of experience total knee arthroplasty; robotic-assisted surgery; position and orientation error; registration; level of experience
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MDPI and ACS Style

Cosendey, K.; Stanovici, J.; Mahlouly, J.; Omoumi, P.; Jolles, B.M.; Favre, J. Bone Cuts Accuracy of a System for Total Knee Arthroplasty including an Active Robotic Arm. J. Clin. Med. 2021, 10, 3714. https://doi.org/10.3390/jcm10163714

AMA Style

Cosendey K, Stanovici J, Mahlouly J, Omoumi P, Jolles BM, Favre J. Bone Cuts Accuracy of a System for Total Knee Arthroplasty including an Active Robotic Arm. Journal of Clinical Medicine. 2021; 10(16):3714. https://doi.org/10.3390/jcm10163714

Chicago/Turabian Style

Cosendey, Killian, Julien Stanovici, Jaad Mahlouly, Patrick Omoumi, Brigitte M. Jolles, and Julien Favre. 2021. "Bone Cuts Accuracy of a System for Total Knee Arthroplasty including an Active Robotic Arm" Journal of Clinical Medicine 10, no. 16: 3714. https://doi.org/10.3390/jcm10163714

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