oSIST prEN ISO 8325:2022

Dentistry - Test methods for rotary instruments (ISO/DIS 8325:2022)

Zahnheilkunde – Prüfverfahren für rotierende Instrumente (ISO/DIS 8325:2022)

Médecine bucco-dentaire - Méthodes d'essai pour instruments rotatifs (ISO/DIS 8325:2022)

Zobozdravstvo - Preskusne metode za vrtilne instrumente (ISO/DIS 8325:2022)

General Information

• Status: Not Published
• Public Enquiry End Date: 27-Apr-2022
• ICS: 11.060.20 - Dental equipment
• ICS: 11.060.25 - Dental instruments
• Technical Committee: VAZ - Healthcare
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 16-Feb-2022
• Due Date: 06-Jul-2022
• Ref Project: prEN ISO 8325 - Dentistry - Test methods for rotary instruments (ISO/DIS 8325:2022)

RELATIONS

• Revised: SIST EN ISO 8325:2005 - Dentistry - Test methods for rotary instruments (ISO 8325:2004)
• Effective Date: 19-Aug-2020

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 8325:2022
01-april-2022
Zobozdravstvo - Preskusne metode za vrtilne instrumente (ISO/DIS 8325:2022)
Dentistry - Test methods for rotary instruments (ISO/DIS 8325:2022)
Zahnheilkunde – Prüfverfahren für rotierende Instrumente (ISO/DIS 8325:2022)
Médecine bucco-dentaire - Méthodes d'essai pour instruments rotatifs (ISO/DIS
8325:2022)
Ta slovenski standard je istoveten z: prEN ISO 8325
ICS:
11.060.25 Zobotehnični instrumenti Dental instruments
oSIST prEN ISO 8325:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 8325:2022
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oSIST prEN ISO 8325:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 8325
ISO/TC 106/SC 4 Secretariat: DIN
Voting begins on: Voting terminates on:
2022-02-04 2022-04-29
Dentistry — Test methods for rotary instruments
Médecine bucco-dentaire — Méthodes d'essai pour instruments rotatifs
ICS: 11.060.20
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 8325:2022(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2022
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oSIST prEN ISO 8325:2022
ISO/DIS 8325:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
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Phone: [phone]
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Published in Switzerland
© ISO 2022 – All rights reserved
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oSIST prEN ISO 8325:2022
ISO/DIS 8325:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

4 Measurement and test methods ..........................................................................................................................................................2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Ambient conditions............................................................................................................................................................................. 2

4.3 Measurements ......................................................................................................................................................................................... 2

5 Measurement of single characteristics ........................................................................................................................................ 2

5.1 Measuring instrument ..................................................................................................................................................................... 2

5.2 Shape of the working part ............................................................................................................................................................ 2

5.2.1 Procedure ................................................................................................................................................................................. 2

5.3 Diameter of the working part .................................................................................................................................................... 3

5.3.1 Location of measurement points ......................................................................................................................... 3

5.3.2 Procedure ................................................................................................................................................................................. 3

5.3.3 Evaluation of test results ............................................................................................................................................ 3

5.4 Neck diameter ......................................................................................................................................................................................... 3

5.4.1 Location of measurement points ......................................................................................................................... 3

5.4.2 Procedure ................................................................................................................................................................................. 3

5.5 Dimensions of shanks ....................................................................................................................................................................... 3

5.5.1 Shank diameter ...................................................................... .............................................................................................. 4

5.5.2 Shank length........................................................................................................................................................................... 4

5.6 Dimensions of mandrels................................................................................................................................................................. 4

5.7 Length of working part ................................................................................................................................................................... 4

5.7.1 Location of measurement points ......................................................................................................................... 4

5.7.2 Procedure ................................................................................................................................................................................. 4

5.8 Overall length .......................................................................................................................................................................................... 4

5.8.1 Location of measurement points ......................................................................................................................... 4

5.8.2 Procedure ................................................................................................................................................................................. 4

5.9 Angle of taper of working part ................................................................................................................................................. 4

5.9.1 Location of measurement points ......................................................................................................................... 4

5.9.2 Procedure ................................................................................................................................................................................. 4

5.10 Run-out of the working part ....................................................................................................................................................... 5

5.10.1 Apparatus ................................................................................................................................................................................. 5

5.10.2 Location of measurement points ......................................................................................................................... 6

5.10.3 Procedure ................................................................................................................................................................................. 6

5.11 Neck strength test ............................................................................................................................................................................... 6

5.11.1 Apparatus ................................................................................................................................................................................. 6

5.11.2 Test force ................................................................................................................................................................................... 7

5.11.3 Procedure ................................................................................................................................................................................. 7

5.11.4 Calculation of test force for neck strength .................................................................................................. 7

5.11.5 Evaluation ........................................................................................................................................... ...................................... 8

5.12 Surface roughness ............................................................................................................................................................................... 8

6 Test report .................................................................................................................................................................................................................. 8

Annex A (informative) Deduction of neck strength formula ..................................................................................................... 9

Bibliography .............................................................................................................................................................................................................................12

iii
© ISO 2022 – All rights reserved
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oSIST prEN ISO 8325:2022
ISO/DIS 8325:2022(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.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 4, Dental

instruments.

This third edition cancels and replaces the second edition (ISO 8325:2004), which has been technically

revised.
The main changes compared to the previous edition are as follows:
a) addition of definitions, e.g. for rotary instruments (3.1);
b) deletion of list of suitable measuring instruments (4.3);
c) clarification of tolerances for the measuring instruments (5.1);

d) replacement of formula for neck strength test (5.9) by a technically based formula (5.9.4);

e) addition of Annex A for deduction of formula 5.9.4.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2022 – All rights reserved
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oSIST prEN ISO 8325:2022
ISO/DIS 8325:2022(E)
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 document.
© ISO 2022 – All rights reserved
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oSIST prEN ISO 8325:2022
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oSIST prEN ISO 8325:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 8325:2022(E)
Dentistry — Test methods for rotary instruments
1 Scope

This document specifies general test methods for rotary instruments used in dentistry. These test

methods are used for measuring the dimensional characteristics, neck strength and surface roughness

of rotary instruments, such as burs, cutters, polishers, diamond instruments, abrasive instruments and

rotary instruments used for oral surgery such as drills, countersinks.
Specific tests are specified in the respective product standards, if available.

This document does not specify test methods for materials used for rotary instruments.

NOTE For these materials see ISO 21850-1 and the respective product standards.
This document is not applicable to endodontic instruments (see ISO 3630-1).
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of t
...