EN 29873:1994
(Main)Reusable metal dental mirrors and handles (ISO 9873:1990)
Reusable metal dental mirrors and handles (ISO 9873:1990)
Wiederverwendbare Metallmundspiegel und Griffe in der Zahnheilkunde (ISO 9873:1990)
Miroirs et manches de miroirs dentaires métalliques réutilisables (ISO 9873:1990)
Reusable metal dental mirrors and handles (ISO 9873:1990)
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Reusable metal dental mirrors and handles (ISO 9873:1990)Wiederverwendbare Metallmundspiegel und Griffe in der Zahnheilkunde (ISO 9873:1990)Miroirs et manches de miroirs dentaires métalliques réutilisables (ISO 9873:1990)Reusable metal dental mirrors and handles (ISO 9873:1990)11.060.20Dental equipmentICS:Ta slovenski standard je istoveten z:EN 29873:1994SIST EN 29873:2000en01-januar-2000SIST EN 29873:2000SLOVENSKI
STANDARD
SIST EN 29873:2000
SIST EN 29873:2000
SIST EN 29873:2000
INTER NATIONAL STANDARD IS0 9873 First edition 1990-08- 15 Reusable metal dental mirrors and handles Miroirs et manches de miroirs dentaires métalliques réutilisables --- Reference number IS0 9873:1990(E) SIST EN 29873:2000
IS0 9873:1990(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Drafi International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Interna- tional Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 9873 was prepared by Technical Committee ISO/TC 106, Dentistry. 8 IS0 1990 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-I211 Genève 20 Switzerland Printed in Switzerland ii SIST EN 29873:2000
IS0 9873:1990(E) 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 disposable mirrors. Standardization of these other types may form the subject of future work. iii SIST EN 29873:2000
SIST EN 29873:2000
INTERNATIONAL STANDARD IS0 9873:1990(E) Reusable metal dental mirrors and handles 1 Scope This International Standard specifies requirements .and tests for reusable mouth mirrors with a coated glass reflecting surface and metal casing and handle 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 publi- cation, the editions indicated were valid. All stan- dards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of ap- plying the most recent editions of the standards in- dicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 261:1973, IS0 general purpose metric screw threads - General pian. IS0 7153-1 :1983, Instruments for surgery - Metallic 0 materials - Part 1: Stainless steel. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 mirror head and the mirror handle. mirror: Assembled instrument comprising the 3.2 mirror head: Assembly comprising the mirror glass, reflecting surface, casing with packing (if present), and the threaded stem. 3.3 stem: That part of the mirror connecting the mirror head 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 may 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 may be observed with no intervening glass layer. 3.7 plane mirror: Dental mirror whose reflecting surface is flat. 3.8 magnifying mirror: Dental mirror whose re- flecting surface is concave to produce an enlarged image of the objects observed. 3.9 nominal magnification: Nomi na1 magnification, M, is calculated from the following equation 250 M=- f wherefis the focal length, in millimetres. 3.10 viewing surface: Surface of the mirror glass, excluding the bevel, not enclosed by the metal cas- ing. (See figure 1, diameter d2.) 3.11 defect( s). distortion: Image deformation due to optical 4 Mirror heads 4.1 Material 4.1.1 Mirror glass The mirror glass shall be made of polished glass free from visible defects such as waves, chips, scratches and other imperfections observable to the naked eye. Test in accordance with 6.1. The glass or front surface reflective coating shall show no blemish or other deterioration after having been tested. 1 SIST EN 29873:2000
IS0 9873:1990(E) Test in accordance with 6.2. 6.3 and 6.4. 4.1.2 Mirror casing The mirror casing shall be made of a metal which is resistant to corrosion, e.g. stainless steel or a plated non-ferrous alloy. The metal shall show no visible signs of corrosion after having been tested. Any visible blemish on the metal shall be considered as evidence of corrosion. Test in accordance with 6.2, 6.3 and 6.4. 4.2 Dimensions Dental mirrors shall meet the dimensions given in figure 1 and table 1. 4.3 Other requirements 4.3.1 Position of mirror head 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 glasskasing. Test in accordance with 6.1. Table 1 - Mirror head and viewing surface DI mensions In mi I I imetres Preferred sizes and designation: nominal diameter dl 18 20 22 24 26 28 30 NOTES di - 2,5 max. d, - 3 max. Size designation currently in use 2 3 4 1 The mirror head size designations are based on the nominal diameter di of the casing expressed in milli- metres and increasing in size by 2 mm. 2 The preferred sizes are suggested for all likely dental applications. Di mensions in mi I I i metres A - c x (when assembled) 1) See IS0 261. 2) To be stated : see 7.3. Figure I - Dental mirror 2 SIST EN 29873:2000
IS0 9873:1990(E) 4.3.2 Casing of mirror head The casing shall have a formed edge which shall be below the level of the viewing surface of the glass and shall be visibly free from sharp edges, burs or other irregularities. Test in accordance with 6.1. The glass shall be held and supported in position in the casing so that no movement can occur under normal conditions of use. The reflecting surface, and if applicable, the packing material within the mirror head casing shall show no sign of deterioration or water ingress after having been tested. Test in accordance with 6.2. e.3.3 Reflecting surfaces The reflecting surfaces shall allow the image to be viewed through, or from, the whole of the viewing surface. Test in accordance with 6.1 4.3.4 Nominal magnification The nominal magnification (see 3.9) of magnifying mirrors shall be between 2,8 and 3,3. 4.3.5 Distortion There shall be no observable distortion when the reflecting surface of the plane or magnifying mirror is tested. Test in accordance with 6.7. 0 4.3.6 Casinglstem joint str
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