ISO INTERNATIONAL STANDARD 20569 First edition 2018-09 Dentistry - Trephine burs Médecine bucco-dentaire - Fraises-trépans Reference number IS0 20569:2018(E) so International Organization for Standardization Shenzhen Institute of Standards and Technology 9972181 @IS02018 ndards Bodies Not for Resale, 2018/12/5 07:27:02 IS0 20569:2018(E) COPYRIGHTPROTECTEDDOCUMENT @IS02018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below or Iso's member body in the country of the requester. ISO copyright office CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ganizationfor Standardization icensee-Shenzhen Institute of Standards andecISogf1&- All rights reserved rious National Standards Bodies IS0 20569:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms, definitions and symbols 3.1 Terms and definitions ..1 3.2 Symbols... 4 Classifications. .2 5 Requirements .3 5.1 Selection of metals. .3 5.2 Surface finish .3 5.3 Dimensions 3 5.3.1 Number of teeth .3 5.3.2 Diameter of the working part and wall thickness. .3 5.3.3 Lengthoftheoperativepart .4 5.3.4 Overall length 4 5.3.5 Dimensions of the shank .4 5.4 Marking lines on the operative part .4 5.4.1 General .4 5.4.2 Thickness of scale line 5.5 Resistance to reprocessing .4 5.6 Vickers hardness. 5.7 Run-out 4 5.8 Resistance to torque. .5 6 Measurement and test methods .5 6.1 Visual inspection. .5 6.2 Dimensions and number of teeth ..5 6.3 Resistance to reprocessing .5 6.4 Vickers hardness. .6 6.5 Run-out. .6 6.6 Resistance to torque. .6 7 Marking, labelling and instructions for use .6 7.1 Marking on the trephine bur.. ..6 7.2 Labelling on the package .6 7.3 Instructions for use. Bibliography 7 Intemaional oganzation @sS2018-All rights reserved iii e=Shenzhen Institute of Standards and Technology 9972181 Not for Resale, 2018/12/5 07:27:02