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U.S. Department of Health and Human Services

Recognized Consensus Standards: Medical Devices
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Part B: Supplementary Information Sheet (SIS)
FR Recognition List Number 053 Date of Entry 12/23/2019 
FR Recognition Number 8-505
Standard
ISO  6474-2 Second edition 2019-03
Implants for surgery - Ceramic materials - Part 2: Composite materials based on a high-purity alumina matrix with zirconia reinforcement
Scope/Abstract
This document specifies the characteristics of, and corresponding test methods for bio-stable ceramic-bone-substitute material based on a zirconia-reinforced, high-purity alumina matrix composite for use as bone spacers, bone replacements and components in orthopaedic joint prostheses.

This document is intended for composite materials which are based on an alumina matrix, i.e. alumina as the dominating phase in the composite with a mass fraction of >60 %, similar to the material described in ISO 6474-1, but extended by means of a certain amount of zirconia and other defined ingredients.


NOTE The required properties in this document differ from those in ISO 6474-1 with respect to strength and fracture toughness. Furthermore, there are requirements specifically applicable for zirconia-containing materials (see ISO 13356).

In the material composition as defined in this document, additional additives are listed. Typical additives for alumina or zirconia ceramics are Mg, Y, Ce and others. Such additives can be useful in order to improve the mechanical properties and/or the chemical stability of the alumina-zirconia composite material.

This document does not cover biocompatibility (see ISO 10993-1). It is the responsibility of the manufacturer to evaluate the biocompatibility of the specific ceramic composite material which is produced within the framework of this document.
Extent of Recognition
Complete standard
Rationale for Recognition
This standard is relevant to medical devices and is recognized on its scientific and technical merit and/or because it supports existing regulatory policies.
Public Law, CFR Citation(s) and Procode(s)*
Regulation Number Device Name Device Class Product Code
§888.3353 Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Polymer, Cemented Or Non-Porous, Uncemented Class 2 LZO
N/A Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Ceramic, Cemented Class 3 LPF
N/A Prosthesis, Hip, Semi-Constrained, Metal/Ceramic/Ceramic/Metal, Cemented Or Uncemented Class 3 MRA
Relevant FDA Guidance and/or Supportive Publications*
Appropriate Use of Voluntary Consensus Standards in Premarket Submissions for Medical Devices - Guidance for Industry and Food and Drug Administration Staff, issued September 2018.
FDA Technical Contact
 John Goode
  FDA/OC/CDRH/OPEQ/OHTVI/DHTVIA/
  301-796-6407
  john.goode@fda.hhs.gov
Standards Development Organization
ISO International Organization for Standardization https://www.iso.org/
FDA Specialty Task Group (STG)
Materials
*These are provided as examples and others may be applicable.
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