EN ISO 3630-8:2026
(Main)Dentistry - Endodontic instruments - Part 8: Accuracy of electronic apex locator (ISO 3630-8:2026)
- Abstract
This document specifies requirements and test methods for measuring the accuracy of electronic apex locators that are used to determine the apex location during endodontic treatment.
- Status
- Published
- Publication Date
- 16-Jun-2026
- Technical Committee
- CEN/TC 55 - Dentistry
- Drafting Committee
- CEN/TC 55 - Dentistry
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 17-Jun-2026
- Due Date
- 07-Apr-2026
- Completion Date
- 17-Jun-2026
EN ISO 3630-8:2026 is a CEN European Standard that adopts ISO 3630-8:2026 for dentistry. It specifies how to measure the accuracy of electronic apex locators used to determine the apex location during endodontic treatment. In practice, it gives manufacturers, test laboratories, and dental device evaluators a common way to check whether the instrument’s indicated apex position matches a reference position within the stated limit.
What does EN ISO 3630-8:2026 specify?
EN ISO 3630-8:2026 covers the accuracy of electronic apex locators and the test methods used to measure that accuracy. The document is organized into Scope, Normative references, Terms and definitions, Requirements, Test methods, Sampling, and a Bibliography.
The introduction also places the document in context: it is for locating the apex of a root canal, while electrical safety and biological safety are handled by other standards named in the document.
What are the key requirements of EN ISO 3630-8:2026?
The core requirement in Clause 4 is that the accuracy of apex location, when tested by the methods in Clause 5, shall be not more than ±0,5 mm. In practice, the device must be close enough to the reference position to support reliable root-canal-length evaluation.
- Clause 4 - The measured difference between the apex locator reading and the reference measuring device is the accuracy value. This tells the reader what to compare during test.
- Clause 4 - The symbols “+” and “-” are left to the manufacturer, and their meaning outside or inside the root canal must be explained in the instruction for use. This matters because users need to understand the display convention.
- Clause 5.1 - Tests are carried out at (25 ± 5) °C. This gives a controlled environment so results are comparable.
- Clause 5.2.1 - The root canal test block is a clear plastic block with a 2 % taper, a circular internal shape, and a simulated apex of 0,2 mm. This creates a repeatable model of a root canal.
- Clause 5.2.2 and 5.2.3 - The test uses a Class 1, nominal size 15 endodontic file and either a video-based measuring device, or an equivalent device, with at least 0,01 mm measuring accuracy. This means the reference measurement must be finer than the tolerance being checked.
- Clause 5.2.4 and 5.4.2 - A height gauge conforming to ISO 13225 may be used as the measuring setup for the alternate procedure. This provides a second way to establish the reference position.
- Clause 5.3.1 and 5.4 - The test liquid is a 0,9 % sodium chloride aqueous solution prepared with grade III water complying with ISO 3696, and the test arrangement must place the root canal and lip hook in contact with the liquid. This simulates the operating environment used for the measurement.
- Clause 6 - The test is carried out on three specimens selected at random. This gives a small but defined sampling basis for verification.
What terms does EN ISO 3630-8:2026 define?
- electronic apex locator - A device designed to detect the end of a tooth.
- probe cord - The wire connecting the main unit to the lip hook, the file holder, or both.
- lip hook - The electrode that contacts the patient’s lip.
- file holder - The electrode attached to an endodontic file.
- display - The screen that shows the location of the file tip in the root canal relative to the apex.
- root canal test block - A clear plastic test block with an internal shape that simulates a root canal.
- accuracy - The closeness of agreement between a measured value and the true value of the measurand.
Who uses EN ISO 3630-8:2026?
EN ISO 3630-8:2026 is used by manufacturers of electronic apex locators, dental instrument test laboratories, and quality teams that verify product performance. It is also useful for purchasers and technical assessors who need to define an acceptance test for apex location accuracy. In dentistry, it supports evaluation of devices used during endodontic treatment, where the apex position is part of root canal length assessment.
What changed in EN ISO 3630-8:2026 from the previous edition?
EN ISO 3630-8:2026 is the first edition of ISO 3630-8. CEN approved the ISO text as EN ISO 3630-8:2026 without modification.
Which standards are used with EN ISO 3630-8:2026?
| Standard | What it contributes |
|---|---|
| ISO 1942 | Dental vocabulary used for terms and definitions. |
| ISO 3630-1 | General requirements for endodontic instruments. |
| ISO 3630-5 | Requirements for shaping and cleaning instruments, including the file used in testing. |
| ISO 3696 | Water quality for preparing the test liquid. |
| ISO 13225 | Design and metrological characteristics of the height gauge. |
The introduction also names IEC 60601-1 and IEC 80601-2-60 for electrical safety, and ISO 10993-1 and ISO 7405 for biological safety assessment.
What does the EN ISO 3630-8:2026 document contain?
The document gives two test procedures: one using a video-based measuring device and one using a height gauge. It also describes the test block, test liquid, file setup, reference position, and the steps for recording the measured value. Figures 1 to 3 illustrate the root canal test block and the two test arrangements, which helps labs set up the measurement in a repeatable way. The bibliography points readers to related standards for biological evaluation and medical electrical safety.
Relations
- Effective Date
- 01-Jul-2026
- Effective Date
- 01-Jul-2026
- Refers
ISO 3630-5:2020 - Dentistry — Endodontic instruments — Part 5: Shaping and cleaning instruments - Effective Date
- 01-Jul-2026
- Effective Date
- 01-Jul-2026
- Effective Date
- 01-Jul-2026
- Consolidated By
ISO 3630-8:2026 - Dentistry — Endodontic instruments — Part 8: Accuracy of electronic apex locator - Effective Date
- 12-Feb-2026
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Frequently Asked Questions
EN ISO 3630-8:2026 is a standard published by the European Committee for Standardization (CEN). Its full title is "Dentistry - Endodontic instruments - Part 8: Accuracy of electronic apex locator (ISO 3630-8:2026)". This standard covers: This document specifies requirements and test methods for measuring the accuracy of electronic apex locators that are used to determine the apex location during endodontic treatment.
This document specifies requirements and test methods for measuring the accuracy of electronic apex locators that are used to determine the apex location during endodontic treatment.
EN ISO 3630-8:2026 is classified under the following ICS (International Classification for Standards) categories: 11.060.25 - Dental instruments. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 3630-8:2026 has the following relationships with other standards: It is inter standard links to ISO 3696:1987, ISO 1942:2020, ISO 3630-5:2020, ISO 3630-1:2019, ISO 13225:2012, ISO 3630-8:2026. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 3630-8:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2026
Zobozdravstvo - Endodontski instrumenti - 8. del: Točnost elektronskega iskalnika
vrha (ISO 3630-8:2026)
Dentistry - Endodontic instruments - Part 8: Accuracy of electronic apex locator (ISO
3630-8:2026)
Zahnheilkunde - Endodontische Instrumente - Teil 8: Genauigkeit des elektronischen
Apex-Locators (ISO 3630-8:2026)
Médecine bucco-dentaire - Instruments d'endodontie - Partie 8: Précision du localisateur
électronique d'apex (ISO 3630-8:2026)
Ta slovenski standard je istoveten z: EN ISO 3630-8:2026
ICS:
11.060.25 Zobotehnični instrumenti Dental instruments
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 3630-8
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2026
EUROPÄISCHE NORM
ICS 11.060.25
English Version
Dentistry - Endodontic instruments - Part 8: Accuracy of
electronic apex locator (ISO 3630-8:2026)
Médecine bucco-dentaire - Instruments d'endodontie - Zahnheilkunde - Endodontische Instrumente - Teil 8:
Partie 8: Précision du localisateur électronique d'apex Genauigkeit des elektronischen Apex-Locators (ISO
(ISO 3630-8:2026) 3630-8:2026)
This European Standard was approved by CEN on 27 April 2026.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3630-8:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 3630-8:2026) 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 2026, and conflicting national standards
shall be withdrawn at the latest by December 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 3630-8:2026 has been approved by CEN as EN ISO 3630-8:2026 without any
modification.
International
Standard
ISO 3630-8
First edition
Dentistry — Endodontic
2026-06
instruments —
Part 8:
Accuracy of electronic apex locator
Médecine bucco-dentaire ― Instruments d'endodontie —
Partie 8: Précision du localisateur électronique d'apex
Reference number
ISO 3630-8:2026(en) © ISO 2026
ISO 3630-8:2026(en)
© ISO 2026
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
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Published in Switzerland
ii
ISO 3630-8:2026(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
5 Test methods . 2
5.1 Test conditions .2
5.2 Apparatus .2
5.3 Reagent .4
5.4 Procedure .4
5.4.1 Using the video-based measuring device .4
5.4.2 Using the height gauge .5
6 Sampling . 6
Bibliography . 7
iii
ISO 3630-8:2026(en)
Foreword
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