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This specification and test method establishes the consistent methods for classifying, and defining the geometric and performance characteristics of five types (cloverleaf, cobra head, reconstruction, straight, and tubular) of metallic bone plates used in the surgical internal fixation of the skeletal system. Also presented here are catalogs of standard specifications for material, labeling, and handling requirements, and standard test methods for measuring performance related mechanical (single cycle bend and bend fatigue) characteristics determined to be important to the in vivo performance of bone plates. This neither defines the levels of performance or case-specific clinical performance for bone plates, nor describes specific designs for bone plates.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
A2.5 Significance and Use
A2.5.1 This test method establishes a uniform four-point bending fatigue test to characterize and compare the fatigue performance of different bone plate designs. This test method may be used to determine a fatigue life of the bone plate at either a specific maximum bending moment or over a range of maximum bending moment conditions. Alternatively, the test method may be used to estimate a bone plate's fatigue strength for a specified number of fatigue cycles.
A2.5.2 This test method utilizes a simplified bone plate load model that may not be exactly representative of the in-situ loading configuration. The user should note that the test results generated by this test method can not be used to directly predict the in vivo performance of the bone plate being tested. The data generated from this test method can be used to conduct relative comparisons of different bone plate designs.
A2.5.3 This test method may not be appropriate for all types of implant applications. The user is cautioned to consider the appropriateness of the method in view of the devices being tested and their potential application.
A2.5.4 This test method assumes that the bone plate is manufactured from a material that exhibits linear-elastic material behavior. Therefore, the method is not applicable for testing bone plates made from materials that exhibit non-linear elastic behavior.
A2.5.5 This test method is restricted to the testing of bone plates within the lnear-elastic range of the material. . Therefore, the test method is not applicable for testing bone plates under conditions that would approach or exceed the bending strength of the bone plate being tested.
1.1 This specification and test method is intended to provide a comprehensive reference for bone plates used in the surgical internal fixation of the skeletal system. The standard establishes consistent methods to classify and define the geometric and performance characteristics of bone plates. The standard also presents a catalog of standard specifications that specify material; labeling and handling requirements; and standard test methods for measuring performance related mechanical characteristics determined to be important to the in vivo performance of bone plates.
1.2 It is not the intention of the standard to define levels of performance or case-specific clinical performance for bone plates, as insufficient knowledge is available to predict the consequences or their use in individual patients for specific activities of daily living. Futhermore, it is not the intention of the standard to describe or specify specific designs for bone plates used in the surgical internal fixation of the skeletal system.
1.3 This document may not be appropriate for all types of bone plates. The user is cautioned to consider the appropriateness of the standard in view of a particular bone plate and its potential application.
1.4 This document includes the following test methods used in determining the following bone plate mechanical performance characteristics:
1.4.1 Standard Test Method for Single Cycle Bend Testing of Metallic Bone Plates— , and
1.4.2 Standard Test Method for Determining the Bending Fatigue Properties Of Metallic Bone Plates— .
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 Multiple test methods are included in this standard. However, it must be noted that the user is not obligated to test using all of the described methods. Instead, the user should only select test methods that are appropriate for a particular device design. In most instances, only a subset of the herein described test methods will be required.
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, health and environmental practices and determine the applicability of regulatory limitations prior to use.
FIG. 1 Bone Plate Cross-sections
1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ISO StandardISO 9585 Implants for SurgeryDetermination of Bending Strength and Stiffness of Bone Plates
E4 Practices for Force Verification of Testing Machines
E122 Practice for Calculating Sample Size to Estimate, With Specified Precision, the Average for a Characteristic of a Lot or Process
E467 Practice for Verification of Constant Amplitude Dynamic Forces in an Axial Fatigue Testing System
E1823 Terminology Relating to Fatigue and Fracture Testing
E1942 Guide for Evaluating Data Acquisition Systems Used in Cyclic Fatigue and Fracture Mechanics Testing
F565 Practice for Care and Handling of Orthopedic Implants and Instruments
F983 Practice for Permanent Marking of Orthopaedic Implant Components
F2503 Practice for Marking Medical Devices and Other Items for Safety in the Magnetic Resonance Environment
ICS Number Code 11.040.40 (Implants for surgery, prothetics and orthotics)
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ASTM F382-17, Standard Specification and Test Method for Metallic Bone Plates, ASTM International, West Conshohocken, PA, 2017, www.astm.orgBack to Top