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Significance and Use
A1.4 Significance and Use
A1.4.1 This test method describes a static bending test to determine the bending stiffness and bending strength of the central and uniform portions of an IMFD.
A1.4.2 This test method may not be appropriate for all types of implant applications (i.e., in proximal or distal extremity of an IMFD where screw holes exist). The user is cautioned to consider the appropriateness of the method in view of the devices being tested and their potential applications.
1.1 This specification is intended to provide a characterization of the design and mechanical function of intramedullary fixation devices (IMFDs), specify labeling and material requirements, provide test methods for characterization of IMFD mechanical properties, and identify needs for further development of test methods and performance criteria. The ultimate goal is to develop a standard which defines performance criteria and methods for measurement of performance-related mechanical characteristics of IMFDs and their fixation to bone. It is not the intention of this specification to define levels of performance or case-specific clinical performance of these devices, as insufficient knowledge to predict the consequences of the use of any of these devices in individual patients for specific activities of daily living is available. It is not the intention of this specification to describe or specify specific designs for IMFDs.
1.2 This specification describes IMFDs for surgical fixation of the skeletal system. It provides basic IMFD geometrical definitions, dimensions, classification, and terminology; labeling and material specifications; performance definitions; test methods and characteristics determined to be important to in-vivo performance of the device.
1.3 Multiple test methods are included in this standard. However, the user is not necessarily obligated to test using all of the described methods. Instead, the user should only select, with justification, test methods that are appropriate for a particular device design. This may be only a subset of the herein described test methods.
1.4 This specification includes four standard test methods:
1.4.1 Static Four-Point Bend Test Method— and
1.4.2 Static Torsion Test Method— .
1.4.3 Bending Fatigue Test Method— .
1.4.4 Test Method for Bending Fatigue of IMFD Locking Screws— .
1.5 A rationale is given in .
1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A214/A214M Specification for Electric-Resistance-Welded Carbon Steel Heat-Exchanger and Condenser Tubes
A450/A450M Specification for General Requirements for Carbon and Low Alloy Steel Tubes
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
E4 Practices for Force Verification of Testing Machines
E467 Practice for Verification of Constant Amplitude Dynamic Forces in an Axial Fatigue Testing System
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1823 Terminology Relating to Fatigue and Fracture Testing
F86 Practice for Surface Preparation and Marking of Metallic Surgical Implants
F138 Specification for Wrought 18Chromium-14Nickel-2.5Molybdenum Stainless Steel Bar and Wire for Surgical Implants (UNS S31673)
F339 Specification for Cloverleaf Intramedullary Pins
F543 Specification and Test Methods for Metallic Medical Bone Screws
F565 Practice for Care and Handling of Orthopedic Implants and Instruments
F1611 Specification for Intramedullary Reamers
F2503 Practice for Marking Medical Devices and Other Items for Safety in the Magnetic Resonance Environment
F2809 Terminology Relating to Medical and Surgical Materials and Devices
AMS StandardAMS 5050
SAE StandardSAE J524 Seamless Low-Carbon Steel Tubing Annealed for Bending and Flaring
ICS Number Code 11.040.40 (Implants for surgery, prothetics and orthotics)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM F1264-16, Standard Specification and Test Methods for Intramedullary Fixation Devices, ASTM International, West Conshohocken, PA, 2016, www.astm.orgBack to Top