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Robot-Based Minimally Invasive Spherical Osteotomy System Improves the Accuracy and Reproducibility of the Resulting
Ruo-Tao Liu1, Qian Tang1, Jin-Shan Zhang2
1Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
Background:
A minimally invasive spherical osteotomy assistant system (MISOS) based on a multi-axis surgical robot was designed to improve the control and precision of manual spherical osteotomy.
Methods:
Based on human sawbone models, the feasibility of MISOS was verified by comparing the osteotomy centre deviation and the section curvature of the acetabulum, femur, and tibia.
Results:
Compared with freehand spherical osteotomy, the MISOS system demonstrated superior centre deviation for the acetabulum (1.48 ± 0.93 vs. 11.15 ± 3.97 mm), femur (3.12 ± 0.75 vs. 8.81 ± 3.04 mm), and tibia (1.91 ± 0.84 vs. 7.33 ± 1.53 mm) as well as superior curvature deviation for the acetabulum (1.40 ± 0.08 vs. 3.16 ± 0.56 mm), femur (0.26 ± 0.07 vs. 0.491 ± 0.21 mm), and tibia (0.21 ± 0.02 vs. 0.46 ± 0.18 mm). These results indicate that MISOS can assist surgeons in performing accurate and stable spherical osteotomy.
Conclusion:
The MISOS system demonstrates promise as a precise assistive tool for minimally invasive orthopaedic spherical osteotomy, with potential for broader clinical applications.
