SVENSK STANDARD SS- Fastställd 2004-09-24 Utgåva 1 Tandvård Roterande instrument Provningsmetoder (ISO 8325:2004) Dentistry Test methods for rotary instruments (ISO 8325:2004) ICS 11.060.20 Språk: engelska Publicerad: november 2004 Copyright SIS. Reproduction in any form without permission is prohibited.
Europastandarden gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av. Denna standard ersätter SS-EN 28325, utgåva 1. The European Standard has the status of a Swedish Standard. This document contains the official English version of. This standard supersedes the Swedish Standard SS-EN 28325, edition 1. Upplysningar om sakinnehållet i standarden lämnas av SIS, Swedish Standards Institute, telefon 08-555 520 00. Standarder kan beställas hos SIS Förlag AB som även lämnar allmänna upplysningar om svensk och utländsk standard. Postadress: SIS Förlag AB, 118 80 STOCKHOLM Telefon: 08-555 523 10. Telefax: 08-555 523 11 E-post: sis.sales@sis.se. Internet: www.sis.se
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO 8325 September 2004 ICS 11.060.20 Supersedes EN 28325:1990 English version Dentistry - Test methods for rotary instruments (ISO 8325:2004) Art dentaire - Méthodes d'essai pour instruments rotatifs (ISO 8325:2004) Zahnheilkunde - Prüfverfahren für rotierende Instrumente (ISO 8325:2004) This European Standard was approved by CEN on 2 September 2004. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. : E
Page 2 Contents Page Foreword...3 Introduction... 4 1 Scope... 5 2 Normative references... 5 3 Terms and definitions... 5 4 Test methods... 5 4.1 General... 5 4.2 Atmospheric conditions... 6 4.3 Measurement instruments... 6 5 Measuring of single characteristics of instruments... 6 5.1 Shape of the working part... 6 5.2 Diameter of the working part... 7 5.3 Neck diameter... 7 5.4 Dimensions of the shank and the mandrel... 8 5.5 Length of the working part... 8 5.6 Overall length... 8 5.7 Angle of the taper of the working part... 9 5.8 Run-out of the working part... 9 5.9 Neck strength... 11 5.10 Surface roughness... 12 Bibliography... 13
Page 3 Foreword This document () 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 March 2005, and conflicting national standards shall be withdrawn at the latest by March 2005. This document supersedes EN 28325:1990. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 8325:2004 has been approved by CEN as without any modifications.
Page 4 Introduction To check the conformity of dental rotary instruments against relevant product standards, it is indispensable to conduct tests on the basis of harmonised test methods in order to achieve comparable test results. In the respective product standards for dental rotary instruments, reference is made to the test methods specified in this International Standard.
Page 5 Dentistry Test methods for rotary instruments 1 Scope This International Standard specifies methods for measuring the dimensional characteristics, neck strength and surface roughness of dental rotary instruments, such as burs, cutters, polishers, diamond and abrasive instruments. This International Standard does not provide test methods for the characteristics of materials used for dental rotary instruments. NOTE For testing of these characteristics, see the respective product standards. This International Standard is not applicable to dental root-canal instruments (see ISO 3630-1). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1797-1, Dental rotary instruments Shanks Part 1: Shanks made of metals ISO 1797-2, Dental rotary instruments Shanks Part 2: Shanks made of plastics ISO 1942, Dentistry Vocabulary ISO 3274, Geometrical Product Specification (GPS) Surface texture: Profile method Nominal characteristics of contact (stylus) instruments ISO 4288, Geometrical Product Specification (GPS Surface texture: Profile method Rules and procedures for the assessment of surface texture 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 1942 apply. 4 Test methods 4.1 General The test methods specified in this International Standard refer to the main dimensional characteristics of dental rotary instruments. They are demonstrated by describing the measurement procedures for the single characteristics of instruments.
Page 6 In addition to the test methods specified below, other equivalent methods and test devices exist and may be used, provided they render similar results. In case of dispute, however, the test methods specified in this International Standard become reference. For evaluation of test results, see the relevant product standard. 4.2 Atmospheric conditions Tests shall be conducted at room temperature (20 C to 25 C). 4.3 Measurement instruments A list of measurement instruments is provided as follows: a) micrometer; b) vernier calliper; c) dial gauge; d) comparator; e) toolmaker's microscope, workshop microscope, measuring microscope; f) shadowgraph (e.g. profile projector); g) ring gauge; h) pneumatic gauge; i) goniometer; j) laser scanner. Other precision instruments may equally be applicable, and may be used at the discretion of the manufacturer. Measurement instruments with reasonable accuracy shall be chosen in respect to the characteristics of the instruments to be measured. Lengths and diameters shall be measured and calculated in millimetres, angles in degrees. 5 Measuring of single characteristics of instruments 5.1 Shape of the working part 5.1.1 Measurement instrument Any suitable instrument of those listed in 4.3 shall be used, having an accuracy of u 0,01 mm. The applied measuring force shall not exceed 1,5 N. 5.1.2 Measurement location The measurement location shall cover the whole representative integral shape of the test piece.