EN ISO 6872:2015

SLOVENSKI STANDARD
01-september-2015
1DGRPHãþD
SIST EN ISO 6872:2008
=RER]GUDYVWYR.HUDPLþQLPDWHULDOL,62
Dentistry - Ceramic materials (ISO 6872:2015)
Zahnheilkunde - Keramische Werkstoffe (ISO 6872:2015)
Médecine bucco-dentaire - Matériaux céramiques (ISO 6872:2015)
Ta slovenski standard je istoveten z: EN ISO 6872:2015
ICS:
11.060.10 =RERWHKQLþQLPDWHULDOL Dental materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 6872
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2015
ICS 11.060.10 Supersedes EN ISO 6872:2008
English Version
Dentistry - Ceramic materials (ISO 6872:2015)
Médecine bucco-dentaire - Matériaux céramiques (ISO Zahnheilkunde - Keramische Werkstoffe (ISO 6872:2015)
6872:2015)
This European Standard was approved by CEN on 23 April 2015.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6872:2015 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Foreword
This document (EN ISO 6872:2015) has been prepared by Technical Committee ISO/TC 106 “Dentistry” in
collaboration with Technical Committee CEN/TC 55 “Dentistry” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by December 2015, and conflicting national standards shall be withdrawn
at the latest by December 2015.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 6872:2008.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 6872:2015 has been approved by CEN as EN ISO 6872:2015 without any modification.

INTERNATIONAL ISO
STANDARD 6872
Fourth edition
2015-06-01
Dentistry — Ceramic materials
Médecine bucco-dentaire — Matériaux céramiques
Reference number
ISO 6872:2015(E)
©
ISO 2015
ISO 6872:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2015 – All rights reserved

ISO 6872:2015(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Material . 1
3.2 Processing . 3
3.3 Properties . 4
4 Types, classes, and their identification . 4
5 Requirements . 6
5.1 Uniformity . 6
5.2 Freedom from extraneous materials. 6
5.3 Mixing and condensation properties of type I ceramics . 6
5.4 Physical and chemical properties . 6
5.5 Biocompatibility . 6
5.6 Shrinkage factor . 6
6 Sampling . 6
6.1 Type I ceramics . 6
6.2 Type II ceramics . 7
7 Test methods . 7
7.1 Preparation of test specimens . 7
7.1.1 Components of test specimens (type I ceramics) . 7
7.1.2 Apparatus for mixing . 7
7.1.3 Method of mixing . 7
7.1.4 Procedure for specimen fabrication . 7
7.1.5 Firing . 8
7.2 Radioactivity of dental ceramic . 8
7.2.1 Preparation of samples . 8
7.2.2 Counting procedure. 8
7.2.3 Assessment of results . 8
7.3 Flexural strength . 8
7.3.1 Three-point and four-point bending tests . 8
7.3.2 Biaxial flexure test (piston-on-three-ball test) .12
7.4 Linear thermal expansion coefficient .14
7.4.1 Apparatus .14
7.4.2 Preparing of test specimens (type I and type II ceramics) .14
7.4.3 Dilatometric measurement .14
7.4.4 Assessment of results .14
7.5 Glass transition temperature .14
7.5.1 Operating procedure .14
7.5.2 Assessment of results .15
7.6 Chemical solubility .15
7.6.1 Reagent . .15
7.6.2 Apparatus .15
7.6.3 Preparation of test specimens .16
7.6.4 Procedure .16
7.6.5 Calculation and assessment of results .16
8 Information and instructions .16
8.1 Information .16
8.1.1 General.16
8.1.2 Type I Ceramics .
...