EN ISO 9873:2000

SLOVENSKI STANDARD
01-november-2000
1DGRPHãþD
SIST EN 29873:2000
Dental hand instrument - Reusable mirrors and handles (ISO 9873:1998)
Dental hand instrument - Reusable mirrors and handles (ISO 9873:1998)
Zahnärztliche Handinstrumente - Wiederverwendbare Spiegel und Handgriffe (ISO
9873:1998)
Instruments dentaires a main - Miroirs et manches de miroirs réutilisables (ISO
9873:1998)
Ta slovenski standard je istoveten z: EN ISO 9873:2000
ICS:
11.060.25 =RERWHKQLþQLLQVWUXPHQWL Dental instruments
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 9873
Second edition
1998-11-01
Dental hand instruments — Reusable
mirrors and handles
Instruments dentaires à main — Miroirs et manches de miroirs réutilisables
A
Reference number
ISO 9873:1998(E)
ISO 9873:1998(E)
Page
Contents
1 Scope .1
2 Normative references .1
3 Definitions .1
4 Requirements.2
5 Test methods.5
6 Marking .9
Annex A Bibliography .10
©  ISO 1998
All rights reserved. Unless otherwise specified, 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 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
© ISO
ISO 9873:1998(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, governmental 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 voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 9873 was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee 4,
Dental instruments.
This second edition cancels and replaces the first edition (ISO 9873:1990), of which it constitutes a technical
revision.
Annex A of this International Standard is for information only.
iii
©
ISO 9873:1998(E) ISO
Introduction
This International Standard specifies requirements for a type of dental viewing and retracting instrument in common
use throughout the world. However, it is well known that there are also other types of mirrors in use which have
different designs and/or are made of different materials. Amongst these other types are mirrors with plastics cases
and/or stems; mirrors with a polished metal reflecting surface (as opposed to a coated glass surface); mirrors with a
cone socket design; and single-use mirrors. Standardization of these other types may form the subject of future
work.
iv
INTERNATIONAL STANDARD  © ISO ISO 9873:1998(E)
Dental hand instruments — Reusable mirrors and handles
1 Scope
This International Standard specifies requirements and test methods for reusable mouth mirrors with a coated glass
reflecting surface and metal casing and metallic handles suitable for dental use in the oral cavity.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
1)
ISO 68-1:— , ISO general-purpose screw threads — Basic profile — Part 1: Metric screw threads.
ISO 724:1993, ISO general-purpose metric screw threads — Basic dimensions.
2)
ISO 965-1:— , ISO general-purpose metric screw threads — Tolerances — Part 1: Principles and basic data.
ISO 1942-3:1989, Dental vocabulary — Part 3: Dental instruments.
ISO 3696:1987,
Water for analytical laboratory use — Specification and test methods.
ISO 7153-1:1991, Surgical instruments — Metallic materials — Part 1: Stainless steel.
ISO 13402:1995, Surgical and dental hand instruments — Determination of resistance against autoclaving,
corrosion and thermal exposure.
3 Definitions
For the purposes of this International Standard, the definitions in ISO 1942-3 and the following definitions apply.
3.1
mirror
intra-oral inspection or inspection and retraction instrument generally comprising the mirror head and the mirror
handle
3.2
mirror head
assembly comprising a glass reflective surface, casing, packing (if present) and stem
—————————
1)  To be published. (Revision in part of ISO 68:1973)
2)  To be published. (Revision of ISO 965-1:1980)
© ISO
ISO 9873:1998(E)
3.3
stem
that part of the mirror head connecting the glass and casing to the handle
3.4
reflecting surface
layer applied to the mirror glass for the purpose of reflecting light
3.5
reflecting back surface
reflecting layer coated onto the back surface of the mirror glass so that the image can be observed through the
glass
3.6
reflecting front surface
reflecting layer coated onto the front surface of the mirror glass so that the image can be observed with no
intervening glass layer
3.7
plane mirror
dental mirror whose reflective surface is flat
3.8
magnifying mirror
dental mirror whose reflective surface is concave to produce an enlarged image of the object observed
3.9
viewing surface
surface of the mirror glass, excluding the bevel, not enclosed by the metal casing
See figure 1, diameter d .
3.10
distortion
image deformation due to optical defect(s)
4 Requirements
4.1 Dimensions
4.1.1 Overall length
The maximum overall length of mirror head plus handle shall be 178 mm. If the mirror can be separated from the
handle for sterilization, the maximum overall length of 178 mm is applicable to each of the separate parts.
4.1.2 Dimensions of connection between stem and handle
The dimensions of the connection between stem and handle shall be M 2,5 in accordance with ISO 724. The
tolerances for the stem shall be 6e and for the handle 6H, in accordance with ISO 965-1. The length of the thread
engagement shall be as shown in figure 1.
4.1.3 Dimensions of mirror casing and viewing surface
Dental mirrors shall meet the dimensions given in figure 1 and table 1.
© ISO
ISO 9873:1998(E)
Table 1 — Mirror head and viewing surface
Preferred sizes and
Size designation currently
designation:
d
in use
nominal diameter
d
16 1
18 2
20 d 2 2,5 mm max. 3
22 4
24 5
26 6
28 d 2 3 mm max. 7
30 8
NOTE 1  The mirror head size designations are based on the nominal diameter d of the casing, expressed in
millimetres, each subsequent size increasing by 2 mm.
NOTE 2  The preferred sizes are recommended for designations for all dental applications.
Dimensions in millimetres
1)  See ISO 724.
2)  To be stated: see 6.3.
3)  When assembled.
Figure 1 — Dental mirror
© ISO
ISO 9873:1998(E)
4.1.4 Position of mirror head with respect to stem
The mirror head shall be positioned such that the long axis of the stem bisects the casing to provide a symmetrical
mount about the plane surface of the mirror
...