Numerical investigation of the relationship between pin deviations and joint coordinates of a unilateral external fixator

Li, Jianfeng; Zhao, Xia; Hu, Xiaojie; Tao, Chunjing; Ji, Run

doi:10.1016/j.clinbiomech.2018.01.024

Cited by 4 publications

(5 citation statements)

References 20 publications

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“…In terms of the correction trajectory, in the deformity correction system developed in 43 , the correction trajectories can be planned and rectified using a computer. Some researchers have described the advantages and accuracy levels of similar approaches 47,48 . However, the approaches cannot reflect the deviation between the actual and the target trajectories during the correction process.…”

Section: Discussionmentioning

confidence: 99%

“…Some researchers have described the advantages and accuracy levels of similar approaches. 47,48 However, the approaches cannot reflect the deviation between the actual and the target trajectories during the correction process. Generally, patients cannot check the current correction status and residual deformities in real-time and do not know whether the correction plan has been implemented on a particular day, which can lead to them becoming emotionally unstable or forgetting to implement the plan.…”

Section: F I G U R E 1mentioning

confidence: 99%

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A 3‐DOF electromotor‐driven external fixator for foot and ankle deformity correction based on X‐ray digital measurement

Wang

Zuo

et al. 2023

Robotics Computer Surgery

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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.

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Section: Discussionmentioning

confidence: 99%

Section: F I G U R E 1mentioning

confidence: 99%

A 3‐DOF electromotor‐driven external fixator for foot and ankle deformity correction based on X‐ray digital measurement

Wang

Zuo

et al. 2023

Robotics Computer Surgery

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“…M. Faschingbauer et al [14] used an infrared tracking system to measure the positioning accuracy of a Hexapod ® fixator and verified that the external fixator has high accuracy. Several researchers have described the advantages and precision of similar mechanisms [13][14][15]. A. M. Amaro et al [28].…”

Section: Discussionmentioning

confidence: 99%

“…By mounting six rods on Ilizarov rings, K Seide et al, developed the hexapod system which can plan and correct deformities with computer assistance [12]. Several researchers have described the advantages and precision of similar mechanisms [13][14][15]. However, they cannot reflect the deflection of the actual and the target trajectory during the correction, and there is no trajectory verification of the pre-operative correction trajectory.…”

Section: Introductionmentioning

confidence: 99%

Development and Preliminary Trajectory Verification of the Electromotor-Driven Parallel External Fixator for Deformity Correction

Dong

et al. 2020

Applied Sciences

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External fixators are widely used in deformity correction based on distraction osteogenesis. Traditionally, the rods are manually operated by patients several times a day, which will ensure the patient’s compliance, accumulative adjustment error, and trajectory deviation. To reduce the patients’ compliance and the complexity of adjustment, an electromotor-driven parallel external fixator is developed to gradually correct the deformity, which allows the fixator to be automatically adjusted and can correct any three-dimensional deformity with continuous stability. Two adjustment strategies are proposed through different trajectory control methods based on the inverse kinematics solution, and the trajectory and bone shape are generated to investigate the characteristics of the new bone more intuitively. The range of motion is performed utilizing the numerical searching method to assess the fixator’s correction capability. Finally, the trajectory verification experiment is carried out using the artificial bone model to perform the two adjustment strategies. The results show that the developed external fixator has high correction accuracy with 0.0172 mm, and can accurately and safely realize the preset correction trajectory. The developed fixator system can also be used as a teaching tool for medical training for clinicians to learn deformity correction technology.

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“…Li et al. [38] identified that the influence of the deviation in the proximal and distal pins is correlated with the joint deviation, thereby providing a guideline for the physician in deciding on the adjustments required to the pins, during the period where the EF is in use. A key finding of this study identifies that the impact due to the movement of one pin, is not limited to its immediate fixator joint.…”

Section: Commonly Used Ef Structural Systemsmentioning

confidence: 99%

An engineering review of external fixators

Fernando

Abeygunawardane

Wijesinghe

et al. 2021

Medical Engineering & Physics

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Highlights Mechanical stability plays a key role in the effectiveness of external fixators. Strength and stiffness are the main factors which contributes towards stability. Modified configurations of linear, circular and hybrid fixators are investigated. Light weight composite materials are gradually replacing traditional metallic alloys. Existing research gaps in further optimizing external fixators are identified.

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Numerical investigation of the relationship between pin deviations and joint coordinates of a unilateral external fixator

Cited by 4 publications

References 20 publications

A 3‐DOF electromotor‐driven external fixator for foot and ankle deformity correction based on X‐ray digital measurement

A 3‐DOF electromotor‐driven external fixator for foot and ankle deformity correction based on X‐ray digital measurement

Development and Preliminary Trajectory Verification of the Electromotor-Driven Parallel External Fixator for Deformity Correction

An engineering review of external fixators

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