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Wear Simulation
Wear simulation for implantable knee, hip and intervertebral spinal disc prostheses, as well as dental devices and other joint components, involves multiple degree-of-freedom loading that generates data for device approval, validating processes and continuing development. To complete wear simulations according to applicable ASTM or ISO standards (ISO 14243 for knee, ISO 18192 or ASTM F2624 for spine, ISO 14242 for hip), tests typically complete up to five or ten million cycles at 1 Hz, which translates into 24x7 tests that run for four or five months. These tests are critical for comparing current and new designs with previous generations.
MTS provides unmatched expertise in wear simulation for biomedical devices. Single- and multi-station systems for wear testing products for the knee, spine and hip are available, along with dental wear simulation systems. Significant capabilities of these systems include:
Knee
• Six test stations to facilitate statistically significant sampling and minimize testing time
• Flexion/extension (My), axial force (Fz), anterior/posterior (Fx) and tibial rotation (Mz),
including varus/valgus and medial/lateral motions
• Options for load soak, force sensing, fluid sensing, test fixturing and temperature
control
Spine
• Six user-friendly specimen containment modules to provide a statistically valid sample
size
• Precise control in four active degrees of freedom plus passive motion in the remaining
two
• High-quality needle bearings designed to last for many years and millions of cycles
Hip
• Test up to twelve hip prostheses simultaneously
• Inclined block and actuators (while axially loaded) are rotated to simulate walking
kinematics
• Corrosion-resistant chambers for blood serum or saline solution house the acetabulum
cup or femoral ball
Dental
• Test and compare dental materials and techniques, including studies of jaw movement
and wear
• Resynthesize the masticatory cycle (including simulation of the oral environment)
through coordinated horizontal and vertical actuation
• Study the material and structural properties dental devices and device-tissue
interfaces
MTS provides unmatched expertise in wear simulation for biomedical devices. Single- and multi-station systems for wear testing products for the knee, spine and hip are available, along with dental wear simulation systems. Significant capabilities of these systems include:
Knee
• Six test stations to facilitate statistically significant sampling and minimize testing time
• Flexion/extension (My), axial force (Fz), anterior/posterior (Fx) and tibial rotation (Mz),
including varus/valgus and medial/lateral motions
• Options for load soak, force sensing, fluid sensing, test fixturing and temperature
control
Spine
• Six user-friendly specimen containment modules to provide a statistically valid sample
size
• Precise control in four active degrees of freedom plus passive motion in the remaining
two
• High-quality needle bearings designed to last for many years and millions of cycles
Hip
• Test up to twelve hip prostheses simultaneously
• Inclined block and actuators (while axially loaded) are rotated to simulate walking
kinematics
• Corrosion-resistant chambers for blood serum or saline solution house the acetabulum
cup or femoral ball
Dental
• Test and compare dental materials and techniques, including studies of jaw movement
and wear
• Resynthesize the masticatory cycle (including simulation of the oral environment)
through coordinated horizontal and vertical actuation
• Study the material and structural properties dental devices and device-tissue
interfaces
Bionix® Spine Wear Simulator
Perform highly accurate, long-term wear, fatigue and durability simulations on both lumbar and cervical spinal disc implants.