Internal Fixator for Distracon Osteogenesis in Children

The proposed device combines the principles of a telescopic intramedullary limb-lengthening nail and the geometry of locking plates and includes a lengthening mechanism. The plate’s extension is driven by a leadscrew, which engages the threaded hole in the piston. When the leadscrew is rotated, the piston moves away from the barrel and linear extension is naturally achieved. A permanent magnet, configured for rotation, is disposed in the barrel, and is coupled to transfer torque to the leadscrew. A remote placed on the patient‘s skin allows the device to extend up to a few mm per day. As of now, the design device is set for children aged 7 to 10 years old and the research team is already planning to manufacture smaller devices. The main concept behind this technology was to provide a plate fixator that can : (1) be implanted internally; (2) be remotely distracted; and (3) include a Pulsed Electromagnetic Field (PEMF) or a Low Intensity Pulsed Ultrasound (LIPUS) technology to accelerate bone regeneration in the distracted gap. The fixator has the form of an extensible plate, applied internally on the long shaft of the bone to avoid interference with the young patient’s growth plates. Gad Sabbatier 418 650-2829

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