Biomechanical Studies of Anterior Talofibular and Calcaneofibular Ligaments Using Robotic-based Joint Testing System and Finite Element Method
Date Issued
2011
Date
2011
Author(s)
Jang, Fang-Jie
Abstract
Ankle joint plays a very important role in human motion. Haman activities like normal walking, climbing upstairs and kinds of exercises, are depending on healthy ankle join, and in ankle joint, anterior talofibular ligament and calcaneofibular ligament are the key for stability. Past studies indicate that it is usually damaged ligaments when ankle injured, especially in anterior talofibular ligament and calcaneofibular ligament, so there are studies discuss about the properties of them, not only for the knowledge of biomechanics of ligaments, but also for the application of clinical surgery.
The main challenge in biomechanics is that the internal force in ligaments in living is hard to measure, and limitations in non-direct way are hard to brake. The past studies about joint are using robotic system to process draw test, and obtain the data in soft tissue in joint motion, but the motion of Talus is uncontrolled in ankle, so the robotic system is not perfectly applied in ankle; in simulation, there are few studies using appropriate material to simulate ligaments.
This study reconstructed an ankle model including tibia, fibula, talus, calcaneus, anterior talofibular and calcaneofibular ligament by MRI, then combine robotic joint testing system and motion analysis system to process laxity test in -10, -5, 0, 5, 10 Dorsiflexion, and using the experimental data to validate the accuracy of the model.
The results of this study show that it is possible to reprocess a cadaver experiment in computer model. In the future this technology can be developed and applied on living body, with corrected kinematic data of bones and subject-specific ligament parameters it is possible to calculate the force in functional activities, and provide a reliable data for clinical rehabilitation and ligament replacement.
Subjects
Ankle
anterior talofibular ligament
calcaneofibular ligament
Finite Element Method
Robot
SDGs
Type
thesis
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