ISO 14242-4-2018 PDF

Full title and description

ISO 14242-4:2018 — Implants for surgery — Wear of total hip-joint prostheses — Part 4: Testing hip prostheses under variations in component positioning which results in direct edge loading. This part specifies test conditions to reproduce edge-loading scenarios caused by steep acetabular cup inclination and dynamic separation, and is intended for use alongside ISO 14242-1 or ISO 14242-3.

Abstract

This document defines specific wear-test conditions that simulate edge loading in hip prostheses resulting from high acetabular cup inclination angles and from dynamic separation events. It provides a standardized approach to reproduce these adverse contact conditions in laboratory wear testing to help evaluate prosthesis performance under such misalignment or dislocation-prone conditions.

General information

• Status: Published (international standard; confirmed on review).
• Publication date: 16 May 2018 (Edition 1, 2018).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 11.040.40 (Implants for surgery; prosthetics and orthotics).
• Edition / version: Edition 1 (2018).
• Number of pages: 11 pages.

General bibliographic and lifecycle information verified from the ISO catalogue and national mirror records. This edition was published in 2018 and the ISO record indicates it was reviewed/confirmed in 2023.

Scope

This part of ISO 14242 specifies test conditions to simulate edge loading in total hip-joint prostheses produced by steep acetabular cup inclination angles and by dynamic separation conditions. It is intended to be used in conjunction with ISO 14242-1 (loading and displacement parameters) or ISO 14242-3 (orbital bearing type machines) so that edge-loading conditions can be reproduced on standard hip-wear test equipment.

Key topics and requirements

• Defined test conditions to reproduce direct edge loading due to component malpositioning or dynamic separation.
• Parameters for cup inclination and dynamic separation actions to be applied during wear tests.
• Intended use alongside ISO 14242-1 or ISO 14242-3 to implement edge-loading protocols on common hip-wear test rigs.
• Focus on reproducibility of adverse contact scenarios rather than full clinical simulation of all gait phases.
• Application for comparative performance testing of component designs and materials under edge-loading stresses.

Typical use and users

Primary users include implant manufacturers, biomechanics and biomaterials test laboratories, regulatory and conformity assessment bodies, research institutions, and quality teams involved in preclinical wear evaluation of hip prostheses. The standard is used to design and run laboratory tests that assess how implants behave when subjected to edge-loading conditions caused by steep cup inclination or dynamic separation.

Related standards

ISO 14242-4:2018 is part of the ISO 14242 series on wear of total hip-joint prostheses and is used together with ISO 14242-1 (Loading and displacement parameters), ISO 14242-2 (Methods of measurement), and ISO 14242-3 (orbital bearing-type testing). National/adopted equivalents (e.g., BS ISO/NEN-ISO versions) and other test-method standards for hip implants are commonly referenced alongside this part.

Keywords

hip prosthesis, wear testing, edge loading, acetabular cup inclination, dynamic separation, orthopedic implants, ISO 14242, preclinical testing, prosthetic wear

FAQ

Q: What is this standard?

A: ISO 14242-4:2018 is an international standard that specifies laboratory test conditions for reproducing direct edge loading in total hip-joint prostheses caused by steep acetabular cup inclination and dynamic separation.

Q: What does it cover?

A: It covers the test setup and parameters needed to simulate edge-loading scenarios in hip-wear tests and is intended to be applied together with ISO 14242-1 or ISO 14242-3 to run such tests on standard wear-testing machines.

Q: Who typically uses it?

A: Implant manufacturers, independent test labs, regulatory reviewers, and academic researchers use this standard to evaluate and compare implant performance under edge-loading conditions.

Q: Is it current or superseded?

A: The 2018 edition (Edition 1) is the published document; the ISO catalogue records this edition as confirmed on review (2023), and it remains the current edition as of the latest ISO lifecycle check.

Q: Is it part of a series?

A: Yes — it is Part 4 of the ISO 14242 series on wear of total hip-joint prostheses; it is intended to be used with other parts in the series (notably Parts 1, 2 and 3).

Q: What are the key keywords?

A: Hip prosthesis, wear testing, edge loading, acetabular cup inclination, dynamic separation, orthopedic implant testing, ISO 14242.