ISO INTERNATIONAL STANDARD 20795-1 Second edition 2013-03-01 Dentistry - Base polymers - Part 1: Denture base polymers Médecine bucco-dentaire-Polymeres de base- Partie 1: Polymeres pour base de protheses dentaires Reference number IS0 20795-1:2013(E) LSO IS02013 IHS under ted without license from IHS Not for Resale IS0 20795-1:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 All rights reserved. Unless otherwise specified, 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 on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56:CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 20795-1:2013(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references 3 Terms and definitions .2 4 Classification .3 5 Requirements .3 5.1 Unpolymerized material 5.2 Polymerized material 2.4 6 Sampling. .6 7 Preparation of test specimens .6 7.1 Laboratory environment .6 7.2 Procedures .7 7.3 Special equipment .7 8 Test methods. .7 8.1 Inspection for compliance determination .7 8.2 Packing plasticity .7 8.3 Colour ..9 8.4 Colour stability. 10 8.5 Polishability, translucency, freedom from porosity, ultimate flexural strength, and flexural modulus. .12 8.6 Fracture toughness with a modified bending test. .17 8.7 Bonding to synthetic polymer teeth 21 8.8 Residual methyl methacrylate monomer. .22 8.9 Water sorption and solubility 27 6 Requirements for labelling, marking, packaging, and instructions supplied by the manufacturer .29 9.1 Packaging. 29 9.2 Marking of outer packages and containers 30 9.3 Manufacturer's instructions .31 Annex A (normative) HPLC method for determination of MMA content .32 Bibliography .35 iii ded by IHS underI se with ISt thout license from IHS Not for Resale