Standard Guide for Gravimetric Wear Assessment of Prosthetic Hip Designs in Simulator Devices
1.1 This guide describes a laboratory method using a weight-loss technique for evaluating the wear properties of materials or devices, or both, which are being considered for use as bearing surfaces of human-hip-joint replacement prostheses. The hip prostheses are evaluated in a device intended to simulate the tribological conditions encountered in the human hip joint, for example, use of a fluid such as bovine serum, or equivalent pseudosynovial fluid shown to simulate similar wear mechanisms and debris generation as found in vivo, and test frequencies of 1 Hz or less.
1.2 Since the hip simulator method permits the use of actual implant designs, materials, and physiological load/motion combinations, it can represent a more physiological simulation than basic wear-screening tests, such as pin-on-disk (see Practice F 732) or ring-on-disk (see ISO 6474).
1.3 It is the intent of this guide to rank the combination of implant designs and materials with regard to material wear-rates, under simulated physiological conditions. It must be recognized, however, that there are many possible variations in the in vivo conditions, a single laboratory simulation with a fixed set of parameters may not be universally representative.
1.4 The reference materials for the comparative evaluation of candidate materials, new devices, or components, or a combination thereof, shall be the wear rate of extruded or compression-molded, ultra-high molecular weight (UHMW) polyethylene (see Specification F 648) bearing against standard counter faces [stainless steel (see Specification F 138); cobalt-chromium-molybdenum alloy (see Specification F 75); thermomechanically processed cobalt chrome (see Specification F 799); alumina ceramic (see Specification F 603)], having typical prosthetic quality, surface finish, and geometry similar to those with established clinical history. These reference materials will be tested under the same wear conditions as the candidate materials.
Please first log in with a verified email before subscribing to alerts.
Your Alert Profile lists the documents that will be monitored. If the document is revised or amended, you will be notified by email. You may delete a document from your Alert Profile at any time. To add a document to your Profile Alert, search for the document and click “alert me”.
Your Alert Profile lists the documents that will be monitored. If the document is revised or amended, you will be notified by email. You may delete a document from your Alert Profile at any time. To add a document to your Profile Alert, search for the document and click “alert me”.
Add to Alert
Already Subscribed to this document.
Your Alert Profile lists the documents that will be monitored. If the document is revised or amended, you will be notified by email. You may delete a document from your Alert Profile at any time. To add a document to your Profile Alert, search for the document and click “alert me”.
PDF Document format
Documents sold on the ANSI Webstore are in electronic Adobe Acrobat PDF format.
DRM protected documents
Some PDF files are protected by Digital Rights Management (DRM) at the request of the copyright holder. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Some copyright holders may impose other restrictions that limit document printing and copy/paste of documents.
Non printable documents
Those documents cannot be printed at the request of the copyright holder.
We have no amendments or corrections for this standard.
Are the documents at the ANSI Webstore in electronic Adobe Acrobat PDF format only?
Documents sold on the ANSI Standards Store are in electronic Adobe Acrobat PDF format.
Standard Subscriptions
This standard is also available to be included in Standards Subscriptions. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards.
Subscription pricing is determined by: the specific standard(s) or collections of standards, the number of locations accessing the standards, and the number of employees that need access.
As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S.
marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.
