Standard Guide for Gravimetric Wear Assessment of Prosthetic Hip Designs in Simulator Devices

Importancia y uso:

3.1 This guide uses a weight loss method of wear determination for the polymeric components used with hip joint prostheses, using serum or demonstrated equivalent fluid for lubrication, and running under a dynamic load profile representative of the human hip joint forces during walking (1, 2).5 The basis for this weight loss method for wear measurement was originally developed (3) for pin-on-disk wear studies (see Test Method F732) and has been extended to total hip replacements (4, 5), femoral-tibial knee prostheses (6), and to femoropatellar knee prostheses (6, 7).

3.2 While wear results in a change in the physical dimensions of the specimen, it is distinct from dimensional changes due to creep or plastic deformation, in that wear generally results in the removal of material in the form of polymeric debris particles, causing a loss in weight of the specimen.

3.3 This guide for measuring wear of the polymeric component is suitable for various simulator devices. These techniques can be used with metal, ceramic, carbon, polymeric, and composite counterfaces bearing against a polymeric material (for example, polyethylene, polyacetal, and so forth). This weight loss method, therefore, has universal application for wear studies of total hip replacements that feature polymeric bearings. This weight loss method has not been validated for high-density material bearing systems, such as metal-metal, carbon-carbon, or ceramic-ceramic. Progressive wear of such rigid bearing combinations generally has been monitored using a linear variable displacement transducer or by other profilometric techniques.

Subcomité:

F04.22

Referida por:

F2977-20, F2003-02R22, F2789-10R20, F3295-18, F2423-11R20, F2025-06R25, F2759-19, F2624-12R20, F1877-24, F2694-16R20

Volúmen:

13.01

Número ICS:

11.040.40 (Implants for surgery, prothetics and orthotics)