ASTM F1717-15
(Test Method)Standard Test Methods for Spinal Implant Constructs in a Vertebrectomy Model
Standard Test Methods for Spinal Implant Constructs in a Vertebrectomy Model
SIGNIFICANCE AND USE
5.1 Spinal implants are generally composed of several components which, when connected together, form a spinal implant assembly. Spinal implant assemblies are designed to provide some stability to the spine while arthrodesis takes place. These test methods outline standard materials and methods for the evaluation of different spinal implant assemblies so that comparison between different designs may be facilitated.
5.2 These test methods are used to quantify the static and dynamic mechanical characteristics of different designs of spinal implant assemblies. The mechanical tests are conducted in vitro using simplified load schemes and do not attempt to mimic the complex loads of the spine.
5.3 The loads applied to the spinal implant assemblies in vivo will, in general, differ from the loading configurations used in these test methods. The results obtained here cannot be used directly to predict in vivo performance. The results can be used to compare different component designs in terms of the relative mechanical parameters.
5.4 Fatigue testing in a simulated body fluid or saline may cause fretting, corrosion, or lubricate the interconnections and thereby affect the relative performance of tested devices. This test should be initially performed dry (ambient room conditions) for consistency. The effect of environment may be significant. Repeating all or part of these test methods in simulated body fluid, saline (9 g NaCl per 1000 mL water), a saline drip, water, or a lubricant should be considered. The maximum recommended frequency for this type of cyclic testing should be 5 Hz.
5.5 The location of the longitudinal elements is determined by where the anchors are clinically placed against bony structures. The perpendicular distance to the load direction (block moment arm) between the axis of a hinge pin and the anchor’s attachment-points to a UHMWPE block is independent of anchor-type. The distance between the anchor’s attachment point to the UHMWPE block an...
SCOPE
1.1 These test methods cover the materials and methods for the static and fatigue testing of spinal implant assemblies in a vertebrectomy model. The test materials for most combinations of spinal implant components can be specific, depending on the intended spinal location and intended method of application to the spine.
1.2 These test methods are intended to provide a basis for the mechanical comparison among past, present, and future spinal implant assemblies. They allow comparison of spinal implant constructs with different intended spinal locations and methods of application to the spine. These test methods are not intended to define levels of performance, since sufficient knowledge is not available to predict the consequences of the use of a particular device.
1.3 These test methods set out guidelines for load types and methods of applying loads. Methods for three static load types and one fatigue test are defined for the comparative evaluation of spinal implant assemblies.
1.4 These test methods establish guidelines for measuring displacements, determining the yield load, and evaluating the stiffness and strength of the spinal implant assembly.
1.5 Some spinal constructs may not be testable in all test configurations.
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 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.
General Information
Relations
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F1717 − 15
Standard Test Methods for
1
Spinal Implant Constructs in a Vertebrectomy Model
This standard is issued under the fixed designation F1717; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
2.1 ASTM Standards:
1.1 These test methods cover the materials and methods for
D638Test Method for Tensile Properties of Plastics
the static and fatigue testing of spinal implant assemblies in a
E4Practices for Force Verification of Testing Machines
vertebrectomymodel.Thetestmaterialsformostcombinations
E6Terminology Relating to Methods of MechanicalTesting
ofspinalimplantcomponentscanbespecific,dependingonthe
E177Practice for Use of the Terms Precision and Bias in
intended spinal location and intended method of application to
ASTM Test Methods
the spine.
E691Practice for Conducting an Interlaboratory Study to
1.2 These test methods are intended to provide a basis for Determine the Precision of a Test Method
E739PracticeforStatisticalAnalysisofLinearorLinearized
the mechanical comparison among past, present, and future
Stress-Life (S-N) and Strain-Life (ε-N) Fatigue Data
spinal implant assemblies. They allow comparison of spinal
E1150Definitions of Terms Relating to Fatigue (Withdrawn
implant constructs with different intended spinal locations and
3
1996)
methodsofapplicationtothespine.Thesetestmethodsarenot
F1582Terminology Relating to Spinal Implants
intended to define levels of performance, since sufficient
F2077TestMethodsForIntervertebralBodyFusionDevices
knowledge is not available to predict the consequences of the
use of a particular device.
3. Terminology
1.3 These test methods set out guidelines for load types and
3.1 Definitions:
methods of applying loads. Methods for three static load types
3.1.1 For definitions of terms relating to these test methods,
and one fatigue test are defined for the comparative evaluation
see Terminology E6, Terminology F1582, and Definitions
of spinal implant assemblies.
E1150.
3.2 Definitions of Terms Specific to This Standard:
1.4 These test methods establish guidelines for measuring
3.2.1 active length of the longitudinal element—the straight
displacements, determining the yield load, and evaluating the
line distance between the center of attachment of the superior
stiffness and strength of the spinal implant assembly.
anchor and the center of attachment of the inferior anchor.
1.5 Some spinal constructs may not be testable in all test
3.2.2 angular displacement at 2 % offset yield (degrees)—
configurations.
the angular displacement of a construct measured via the
actuatorthatproducesapermanentangulardisplacementinthe
1.6 The values stated in SI units are to be regarded as
X-Y plane equal to 0.020 times the torsional aspect ratio (see
standard. No other units of measurement are included in this
Point A in Fig. 1).
standard.
3.2.3 block moment arm—the distance in the X direction in
1.7 This standard does not purport to address all of the
the XY plane between the axis of the hinge pin and either (1)
safety concerns, if any, associated with its use. It is the
the center of the insertion point of an anchor (screws and
responsibility of the user of this standard to establish appro-
bolts), (2) the furthest point of contact between the block and
priate safety and health practices and determine the applica-
plate (anterior plates), or (3) the center point of attachment on
bility of regulatory limitations prior to use.
the roll pin farthest from the hinge pin (hooks and wires).
1 2
These test methods are under the jurisdiction of ASTM Committee F04 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Medical and Surgical Materials and Devicesand are the direct responsibility of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Subcommittee F04.25 on Spinal Devices. Standards volume information, refer to the standard’s Document Summary page on
CurrenteditionapprovedMay1,2015.PublishedJuly2015.Originallyapproved the ASTM website.
3
in 1996. Last previous edition approved in 2014 as F1717–14. DOI: 10.1520/ The last approved version of this historical standard is referenced on
F1717-15. www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F1717 − 15
the 2% offset angular displacement (see Point B in Fig. 1).
(The distance between Point A and Point B in Fig. 1.)
3.2.10 elastic displacement (mm)—the displacement at 2%
offset yield (see Point A in Fig. 1) minus the
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1717 − 14 F1717 − 15
Standard Test Methods for
1
Spinal Implant Constructs in a Vertebrectomy Model
This standard is issued under the fixed designation F1717; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 These test methods cover the materials and methods for the static and fatigue testing of spinal implant assemblies in a
vertebrectomy model. The test materials for most combinations of spinal implant components can be specific, depending on the
intended spinal location and intended method of application to the spine.
1.2 These test methods are intended to provide a basis for the mechanical comparison among past, present, and future spinal
implant assemblies. They allow comparison of spinal implant constructs with different intended spinal locations and methods of
application to the spine. These test methods are not intended to define levels of performance, since sufficient knowledge is not
available to predict the consequences of the use of a particular device.
1.3 These test methods set out guidelines for load types and methods of applying loads. Methods for three static load types and
one fatigue test are defined for the comparative evaluation of spinal implant assemblies.
1.4 These test methods establish guidelines for measuring displacements, determining the yield load, and evaluating the stiffness
and strength of the spinal implant assembly.
1.5 Some spinal constructs may not be testable in all test configurations.
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.7 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D638 Test Method for Tensile Properties of Plastics
E4 Practices for Force Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E739 Practice for Statistical Analysis of Linear or Linearized Stress-Life (S-N) and Strain-Life (ε-N) Fatigue Data
3
E1150 Definitions of Terms Relating to Fatigue (Withdrawn 1996)
F1582 Terminology Relating to Spinal Implants
F2077 Test Methods For Intervertebral Body Fusion Devices
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms relating to these test methods, see Terminology E6, Terminology F1582, and Definitions E1150.
3.2 Definitions of Terms Specific to This Standard:
1
These test methods are under the jurisdiction of ASTM Committee F04 on Medical and Surgical Materials and Devices and are the direct responsibility of Subcommittee
F04.25 on Spinal Devices.
Current edition approved Jan. 1, 2014May 1, 2015. Published March 2014July 2015. Originally approved in 1996. Last previous edition approved in 20132014 as
F1717 – 13.F1717 – 14. DOI: 10.1520/F1717-14.10.1520/F1717-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
F1717 − 15
3.2.1 active length of the longitudinal element—the straight line distance between the center of attachment of the superior
anchor and the center of attachment of the inferior anchor.
3.2.2 angular displacement at 2 % offset yield (degrees)—the angular displacement of a construct measured via the actuator that
produces a permanent angular displacement in the X-Y plane equal to 0.020 times the torsional aspect ratio (see Point A in Fig.
1).
3.2.3 block moment arm—the perpendicular todistance in the appliedX load direction in the XYbetween the plane between the
axis of the hinge pin and either (1) the center of t
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.