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Facet Solutions' AFRS(TM) Demonstrates Biomechanical Advantages Over Dynamic Stabilization in Independent Testing
Date:10/22/2007

LOGAN, Utah, Oct. 22 /PRNewswire/ -- Facet Solutions, Inc. announced today that testing conducted by Professor Vijay Goel, PhD., from the Department of Bioengineering at the University of Toledo, demonstrated that the Anatomic Facet Replacement System (AFRS(TM)) has shown biomechanical advantages when compared to dynamic stabilization devices. The objective of the testing was to compare the range of motion, pedicle screw stresses, and spinal stability of facet joint replacement versus dynamic stabilization devices.

An experimentally validated computer model of the spine implanted with the AFRS(TM) demonstrated reduced stresses in the pedicle screws supporting the implant. In addition, the results showed improved motion and structural support to the spine.

"Three inherent characteristics of the AFRS(TM) are thought to contribute to these positive results," stated Professor Goel. "These characteristics are: the anatomic implant design, the unconstrained range of motion, and the replacement of diseased bone with a cobalt chrome implant. Additional testing will be conducted to determine the impact that the AFRS(TM) will have on disc pressures when implanted in the spine."

When treating patients with low back pain, one of the most important concerns for a spine surgeon is how to stabilize the spine after performing a spinal decompression (removal of bone around inflamed nerve roots). In the past, the only option available was a spinal fusion. However, a fusion eliminates motion and may cause the joints adjacent to the fusion to degenerate more quickly. These concerns lead to the development of motion preservation devices like dynamic stabilization and facet joint replacement. Dynamic stabilization is an adjunct to fusion and typically utilizes preloaded rods and screws to provide controlled motion. By contrast, facet joint replacement allows for unconstrained motion and mimics the natural kinematics, balance, and stability in the spine joints; si
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