ISO INTERNATIONAL STANDARD 6475 First edition 1989-11-01 Implants for surgery - Metal bone screws with asymmetrical thread and spherical under-surface Mechanical requirements and test methods Implants chirurgicaux - Vis metalliques a filetage asymetrique et a embase spherique pour os - Caracteristiques mecaniques et methodes d'essai Reference number ISO 6475 : 1989 (E) ISO6475:1989 (E) Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through Iso technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISo, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with IsO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 6475 was prepared by Technical Committee ISO/TC 150, Implants for surgery. This first edition of ISo 6475 cancels and replaces the first editions of ISO 6475-1 : 1980 and IS0 6475-2 : 1980, of which it constitutes a revision and amalgamation. Annex A forms an integral part of this International Standard. Annexes B and C are for informationonly ? ISO1989 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland Coovriaht intemational Oraanization for Standardization ISO6475:1989 (E) Introduction This International Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of whoever uses it to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. The results obtained in this method bear no direct correlation to the use of the subject bone screw. This test method is used only for purposes of maintaining the uniformity of the product tested. ili Coovriaht Intern Standardizatior