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    Static and Dynamic Spinal Implants: Are We Evaluating Them Appropriately?

    Jensen Laura, Spenciner David, Graham Jove, Anderson Paul
    Published: 2012

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    Twenty peer-reviewed papers provide the latest research on spinal implants. Sections cover:

    Interbody Fusion Devices—examines several test parameters used in the evaluation of interbody spacers and other fusion devices (ASTM F2077). Papers cover variations in the fixture design, bone analog material, and mode of testing are presented.

    Disc and Nucleus Devices—covers the frequency dependence of polymeric core discs, sensitivity of wear and impingement tests to input parameters, and a ground-breaking comparison of human in vivo ranges of motion to the parameters outlined in ASTM F2423.

    In vitro Testing Methods—discusses mechanically tested spinal devices using human spinal segments as the test medium and development of a more physiological loading protocol.

    Longitudinal Systems—emphasizes the importance of ASTM F1717 Test Method for Spinal Constructs in a Vertebrectomy Model.

    Significance and Future Work—covers the latest testing technology, including precision and bias methods, impingement of motion preserving technologies, subsidence of interbody fusion devices, evaluation of annular repair, and combination cage/screw devices.

    Table of Contents

    Kinematic Stability Evaluation of Spinal Fusion Devices by Synthetic FSU Model

    Comparison of Two Bone Surrogates for Interbody Device Subsidence Testing

    Symposium on Static and Dynamic Spinal Implants: Are We Evaluating Them Appropriately?

    Comparison of Daily Motion of the Cervical and Lumbar Spine to ASTM F2423-11 and ISO 18192-1.2011 Standard Testing

    Wear Simulation of Total Disc Arthroplasties: Sensitivity to Device Design and Test Parameters

    How Frequency Affects Fatigue Testing of an Artificial Disc With a Viscoelastic Polymer Core

    Derivation of Clinically Relevant Boundary Conditions Suitable for Evaluation of Chronic Impingement of Lumbar Total Disk Replacement: Application to Standard Development

    Development of a More Physiological Loading Protocol for Spine In Vitro Flexibility Testing

    Primary Stability of a Dynamic Artificial Disc Tested in a Human Cadaveric Model

    Rationale of a Test Setup with a Defined COR for Extra-Discal Motion-Preserving Implants with a Low Implant Stiffness

    Biomechanical Cyclical Loading on Cadaveric Cervical Spines in a Corpectomy Model

    A Method to Test Anterior-Posterior Construct Shear Fatigue Based on the Vertebrectomy Model

    The Use of a Single-Level Construct Model to Evaluate Nonmetallic “Flexible” Rods

    Vertebrectomy Model for the Mechanical Assessment of Fusionless Scoliosis Growth Rods

    Static Evaluation of Pedicle Screw Spinal Constructs to the ASTM Standard: A Comparison of Multiple Test Laboratories

    ASTM F2624-07—Evaluating an Alternate Fixture for Testing Extra Discal Motion Preserving Implants

    ASTM F2624—Evaluating Alternate Fixtures for Flexion/Extention, Lateral Bending, and Axial Rotation Testing of Extra Discal Motion Preserving Implants

    Symposium on Static and Dynamic Spinal Implants: Are We Evaluating Them Appropriately? Effect of Tightening Torque on ASTM F1798 Axial Gripping Capacity

    Comparison of Self-Drilling and Self-Tapping Cervical Spine Screws Using ASTM F543-07

    Fixture Variations When Evaluating ASTM F1717 Construct Stiffness: Pin Diameter and Material

    Author and Subject Index

    Subject Index

    Committee: F04

    DOI: 10.1520/STP1535-EB

    ISBN-EB: 978-0-8031-9418-2

    ISBN-13: 978-0-8031-7521-1