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A 3D-Printed, Adjustable-Stiffness Knee Brace with Embedded Magnetic Angle Sensor.

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    This study introduces a 3D-printed knee brace with adjustable stiffness and an angle sensor for monitoring joint movement. The flexible brace allows for personalized knee loading during various activities.

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    Area of Science:

    • Biomedical Engineering
    • Orthopedics
    • Wearable Technology

    Background:

    • Developing advanced orthotic devices is crucial for rehabilitation and performance.
    • Existing knee braces often lack adaptability in stiffness and real-time kinematic monitoring.
    • 3D printing offers novel possibilities for customized and functional brace design.

    Purpose of the Study:

    • To design and verify a novel 3D-printed, flexible knee brace.
    • To incorporate an embedded magnetic angle sensor for joint kinematics monitoring.
    • To enable selective modification of the brace's torsional stiffness.

    Main Methods:

    • Utilized 3D printing for brace fabrication.
    • Integrated a magnetic angle sensor for kinematic data acquisition.
    • Performed benchtop testing and finite element analysis to characterize mechanical behavior.
    • Assessed torsional stiffness with varying elastic band thicknesses.
    • Conducted a pilot study with able-bodied subjects during walking and seated flexion-extension.

    Main Results:

    • The flexible knee brace was successfully designed and verified.
    • Torsional stiffness could be selectively modulated by adjusting elastic band thickness.
    • Mechanical behavior and stiffness estimates were characterized through testing and simulation.
    • The device demonstrated the ability to modulate knee joint loading in a pilot study.

    Conclusions:

    • The novel 3D-printed knee brace offers adjustable stiffness and kinematic monitoring capabilities.
    • This technology has potential applications in rehabilitation, sports, and personalized orthotics.
    • Further research can explore clinical applications and long-term performance.