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A 3-DOF electromotor-driven external fixator for foot and ankle deformity correction based on X-ray digital
Jianfeng Li1, Shuang Wang1, Shiping Zuo1
1Beijing Key Laboratory of Advanced Manufacturing Technology, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, China.
Background:
The use of external fixators to treat foot and ankle deformities remains a challenge in orthopedic surgery due to their diversity. We hope to improve the automation and accuracy of the correction process.
Methods:
A three-degree-of-freedom (3-DOF) electromotor-driven external fixator for uniplanar foot and ankle deformities was proposed. Computer-assisted correction software was developed to help surgeons use digital technology to measure the required parameters from patients' X-ray radiographs. The correction trajectory and the prescriptions were generated in the software based on the proposed correction strategy.
Results:
Two clinical cases were simulated to verify the correction ability of the developed external fixator. The results showed that the angular and displacement deformities were well corrected.
Conclusions:
The developed external fixator can accurately and automatically correct foot and ankle deformities with the help of computer-assisted correction software, which significantly reduces the burden on surgeons and patients.
