Test Methods For Intervertebral Body Fusion Devices

SCOPE
1.1 This test method covers the materials and methods for the static and dynamic testing of intervertebral body fusion device assemblies, spinal implants designed to promote arthrodesis at a given spinal motion segment.
1.2 This test method is intended to provide a basis for the mechanical comparison among past, present, and future nonbiologic intervertebral body fusion device assemblies. This test method allows comparison of intervertebral body fusion device assemblies with different intended spinal locations and methods of application to the intradiscal spaces. This test method is intended to enable the user to compare intervertebral body fusion device assemblies mechanically and does not purport to provide performance standards for intervertebral body fusion device assemblies.
1.3 The test method describes static and dynamic tests by specifying load types and specific methods of applying these loads. These tests are designed to allow for the comparative evaluation of intervertebral body fusion device assemblies.
1.4 This test method does not purport to address expulsion testing of intervertebral body fusion device assemblies. However, since expulsion is a potential clinical failure mode, the user should address the implant's resistance to expulsion.
1.5 Guidelines are established for measuring displacements, determining the yield load or moment, evaluating the stiffness, and strength of the intervertebral body fusion device assemblies.
1.6 Some intervertebral body fusion device assemblies may not be testable in all test configurations.
1.7 The values stated in SI units are to be regarded as the standard with the exception of angular measurements, which may be reported in terms of either degrees or radians.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Publication Date
09-May-2001
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ASTM F2077-00 - Test Methods For Intervertebral Body Fusion Devices
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: F 2077 – 00
Test Methods For
1
Intervertebral Body Fusion Devices
This standard is issued under the fixed designation F 2077; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
2
1. Scope E 4 Practices for Force Verification of Testing Machines
E 6 Terminology Relating to Methods of Mechanical Test-
1.1 This test method covers the materials and methods for
2
ing
the static and dynamic testing of intervertebral body fusion
E 1823 Terminology Relating to Fatigue and Fracture Test-
device assemblies, spinal implants designed to promote arthro-
2
ing
desis at a given spinal motion segment.
3
F 1582 Terminology Relating to Spinal Implants
1.2 This test method is intended to provide a basis for the
mechanical comparison among past, present, and future non-
3. Terminology
biologic intervertebral body fusion device assemblies. This test
3.1 For definition of terms refer to Terminology E 6,
method allows comparison of intervertebral body fusion device
E 1823, and F 1582.
assemblies with different intended spinal locations and meth-
3.2 Definitions of Terms Specific to This Standard:
ods of application to the intradiscal spaces. This test method is
3.2.1 coordinate system/axes, n—Three orthogonal axes are
intended to enable the user to mechanically compare interver-
defined by Terminology F 1582. The center of the coordinate
tebral body fusion device assemblies and does not purport to
system is located at the geometric center of the intervertebral
provide performance standards for intervertebral body fusion
body fusion device assembly. The XY plane is to bisect the
device assemblies.
sagittal plane angle between superior and inferior lines (sur-
1.3 The test method describes static and dynamic tests by
faces) that are intended to simulate the adjacent vertebral end
specifying load types and specific methods of applying these
plates. The positive Z axis is to be directed superiorly. Force
loads. These tests are designed to allow for the comparative
components parallel to the XY plane are shear components of
evaluation of intervertebral body fusion device assemblies.
loading. The compressive axial force is defined to be the
1.4 This test method does not purport to address expulsion
component in the negative Z direction. Torsional load is
testing of intervertebral body fusion device assemblies. How-
defined to be the component of moment parallel to the Z axis.
ever, since expulsion is a potential clinical failure mode, the
3.2.2 fatigue life, n—The number of cycles, N, that the
user should address the implant’s resistance to expulsion.
intervertebral body fusion device assembly can sustain at a
1.5 Guidelines are established for measuring displacements,
particular load or moment before mechanical or functional
determining the yield load or moment, evaluating the stiffness,
failure occurs.
and strength of the intervertebral body fusion device assem-
3.2.3 functional failure, n—Permanent deformation that
blies.
renders the intervertebral body fusion device assembly inef-
1.6 Some intervertebral body fusion device assemblies may
fective or unable to resist load and/or maintain attachment
not be testable in all test configurations.
adequately.
1.7 The values stated in SI units are to be regarded as the
3.2.4 ideal insertion location, n—The implant location with
standard with the exception of angular measurements, which
respect to the simulated inferior and superior vertebral bodies
may be reported in terms of either degrees or radians.
(polyacetal or metal blocks) dictated by the type, design, and
1.8 This standard does not purport to address all of the
manufacturer’s surgical installation instructions or the sur-
safety concerns, if any, associated with its use. It is the
geon’s preferred method of insertion.
responsibility of the user of this standard to establish appro-
3.2.5 intended method of application, n—Intervertebral
priate safety and health practices and determine the applica-
body fusion device assemblies may contain different types of
bility of regulatory limitations prior to use.
stabilizing anchors such as threads, spikes, and knurled sur-
2. Referenced Documents faces. Each type of anchor has an intended method of appli-
cation or attachment to the spine.
2.1 ASTM Standards:
3.2.6 intended spinal location, n—The anatomic region of
the spine intended for the intervertebral body fusion device
1
This test method is under the jurisdiction of ASTM Committee F04 on Medical
and Surgical Materials and Devices, and is the direct responsibility of Subcommittee
F04.25 on Spinal Devices.
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