EN ISO 24395:2023
(Main)Dentistry - Classification of tooth restorations preparation (ISO 24395:2023)
Dentistry - Classification of tooth restorations preparation (ISO 24395:2023)
This document establishes a system for classifying the location and depth of human tooth restorations preparations.
Zahnheilkunde - Einteilung von Zahnrestaurationspräparationen (ISO 24395:2023)
Dieses Dokument legt ein System zur Klassifizierung der Lage und Tiefe von Präparationen für Zahnrestaurationen beim Menschen fest.
Médecine bucco-dentaire - Classification de la préparation des restaurations dentaires (ISO 24395:2023)
Le présent document établit un système pour la classification de l’emplacement et de la profondeur des préparations en vue de restaurations de dents humaines.
Zobozdravstvo - Klasifikacija priprave zobnih obnov (ISO 24395:2023)
Ta dokument določa sistem za označevanje izgube zobnega materiala in razširitev restavracije človeških zob. Namen je poleg amalgama opisati uporabo novih polnilnih in restavracijskih materialov.
Ta dokument določa skupno podlago za klinično uporabo sodobnih polnilnih in restavracijskih materialov, kot je opisano v navodilih za uporabo proizvajalca restavracijskih materialov, z določitvijo mednarodno sprejete klasifikacije za restavracije.
General Information
- Status
- Published
- Publication Date
- 22-Aug-2023
- Technical Committee
- CEN/TC 55 - Dentistry
- Drafting Committee
- CEN/TC 55 - Dentistry
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 23-Aug-2023
- Completion Date
- 23-Aug-2023
Overview
EN ISO 24395:2023 - Dentistry - Classification of tooth restorations preparation (ISO 24395:2023) establishes a standardized system for describing the location and depth of human tooth preparation prior to placement of restorations. Published in 2023 and endorsed by CEN as a European Standard, this document provides consistent terminology to support product labeling, clinical decision-making and comparison of restorative materials.
Key topics and requirements
- Scope: Classifies preparations by anatomical location on the tooth and by the deepest tissue structure penetrated.
- Location classification (Classes 1–7):
- Class 1: single-surface occlusal, facial or lingual/palatal and posterior proximal without occlusal extension
- Class 2: posterior proximal with occlusal extension
- Class 3: anterior proximal without incisal involvement
- Class 4: anterior proximal including an incisal edge
- Class 5: gingival sites on facial or lingual/palatal surface
- Class 6: cusp tips
- Class 7: core (main central tooth structure)
- Depth classification (E, D, P codes):
- E1 / E2: outer/inner halves of enamel
- D1 / D2 / D3: outer, middle, inner thirds of dentine
- P1 / P2: pulp chamber; pulp chamber plus coronal root canal access
- Normative references: Builds on ISO 1942 (vocabulary) and ISO 3950 (tooth/designation system).
- Recommendations for use: The classification is recommended for manufacturer’s instructions for use, product catalogues and other documentation to specify intended application of restorative materials.
Applications and who should use this standard
- Dental manufacturers and product managers - to label intended uses of restorative materials consistently and to specify clinical indications in instructions for use.
- Clinicians and dental teams - to document preparation type and depth in patient records, treatment planning and communication across care settings.
- Researchers and clinical trial authors - to define inclusion criteria and to compare outcomes across studies using a standardized lesion/preparation taxonomy.
- Regulatory bodies and procurement specialists - to evaluate conformity of restorative products against specified intended uses.
- Dental educators - to teach a modern, internationally accepted system that complements or updates historical cavity classifications.
Related standards and value
- Related: ISO 1942 (Dentistry - Vocabulary) and ISO 3950 (Designation system for teeth).
- Value: Harmonized terminology improves interoperability, enables direct comparison of restorative materials, supports decision-support tools and enhances clarity in product documentation - promoting better clinical outcomes and streamlined regulatory/market communications.
Keywords: ISO 24395, dentistry standard, tooth restoration classification, tooth preparation depth, restorative materials, dental manufacturers, clinical documentation.
Frequently Asked Questions
EN ISO 24395:2023 is a standard published by the European Committee for Standardization (CEN). Its full title is "Dentistry - Classification of tooth restorations preparation (ISO 24395:2023)". This standard covers: This document establishes a system for classifying the location and depth of human tooth restorations preparations.
This document establishes a system for classifying the location and depth of human tooth restorations preparations.
EN ISO 24395:2023 is classified under the following ICS (International Classification for Standards) categories: 11.060.01 - Dentistry in general. The ICS classification helps identify the subject area and facilitates finding related standards.
You can purchase EN ISO 24395:2023 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2023
Zobozdravstvo - Klasifikacija priprave zobnih obnov (ISO 24395:2023)
Dentistry - Classification of tooth restorations preparation (ISO 24395:2023)
Zahnheilkunde - Einteilung von Zahnrestaurationspräparationen (ISO 24395:2023)
Médecine bucco-dentaire - Classification de la préparation des restaurations dentaires
(ISO 24395:2023)
Ta slovenski standard je istoveten z: EN ISO 24395:2023
ICS:
11.060.01 Zobozdravstvo na splošno Dentistry in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 24395
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2023
EUROPÄISCHE NORM
ICS 11.060.01
English Version
Dentistry - Classification of tooth restorations preparation
(ISO 24395:2023)
Médecine bucco-dentaire - Classification de la Zahnheilkunde - Einteilung von
préparation des restaurations dentaires (ISO Zahnrestaurationspräparationen (ISO 24395:2023)
24395:2023)
This European Standard was approved by CEN on 12 August 2023.
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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 24395:2023 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 24395:2023) 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 February 2024, and conflicting national standards
shall be withdrawn at the latest by February 2024.
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 24395:2023 has been approved by CEN as EN ISO 24395:2023 without any modification.
INTERNATIONAL ISO
STANDARD 24395
First edition
2023-08
Dentistry — Classification of tooth
restorations preparation
Médecine bucco-dentaire — Classification de la préparation des
restaurations dentaires
Reference number
ISO 24395:2023(E)
ISO 24395:2023(E)
© ISO 2023
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 24395:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 1
4.1 Location of preparation . 1
4.2 Depth of tooth restoration preparations . 2
5 Recommendations . 2
Bibliography . 3
iii
ISO 24395:2023(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 i
...










Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...