ISO 10394:2023

Dentistry - Designation system for supernumerary teeth

This document establishes a system for the designation of supernumerary teeth in humans using two alphanumeric characters.

Médecine bucco-dentaire — Code de désignation des dents surnuméraires

Le présent document établit un code de désignation des dents surnuméraires humaines utilisant deux caractères alphanumériques.

General Information

• Status: Published
• Publication Date: 02-Feb-2023
• ICS: 11.060.01 - Dentistry in general
• Technical Committee: ISO/TC 106/SC 3 - Terminology
• Drafting Committee: ISO/TC 106/SC 3 - Terminology
• Current Stage: 6060 - International Standard published
• Start Date: 03-Feb-2023
• Due Date: 30-Jun-2023
• Completion Date: 03-Feb-2023

Overview

ISO 10394:2023 - "Dentistry - Designation system for supernumerary teeth" defines a standardized, two-character alphanumeric system for identifying supernumerary (extra) human teeth. The standard preserves the two-character format familiar from tooth notation systems to maximize compatibility with existing dental forms, software and messaging, while remaining independent of ISO 3950 so as not to change meanings already assigned there.

Key topics and requirements

• Two-character code: Every supernumerary tooth is designated by two alphanumeric characters (Table 1 in the standard).
• First character - quadrant:
  • A = quadrant 10 (upper right)
  • B = quadrant 20 (upper left)
  • C = quadrant 30 (lower left)
  • D = quadrant 40 (lower right)
• Second character - position within quadrant:
  • 1–8 map to locations from central incisor area through third molar area (1 = central incisor region; 8 = third molar region).
• Midline designations:
  • AB = midline area of the maxilla (upper)
  • DC = midline area of the mandible (lower)
• Location rules:
  • Designation relates a supernumerary tooth’s location to the tooth normally present at or immediately mesial to that site.
  • If a supernumerary overlaps more than one normal location, use the mesial-most position.
  • Bucco-lingual (facial/lingual) position is not considered; “normal location” may include buccal or lingual to the usual site.
• Tooth set classification: Supernumerary teeth are not considered part of normal deciduous or permanent tooth sets and therefore are not classified as deciduous or permanent within this system.
• Design principles: The system follows requirements to be simple, communicable, computer-friendly, teachable, adaptable to standard charts and-critically-not to reassign any meanings already used in ISO 3950.

Applications and users

ISO 10394 is applicable for:

• Clinical charting and dental records (general dentists, orthodontists, oral surgeons)
• Radiographic reporting and intraoral examination notes
• Electronic health records (EHR) and dental practice management software
• Data exchange, research registries, public health surveillance and dental epidemiology
• Standards bodies and implementers ensuring interoperability with existing tooth-designation systems

Primary users include dentists, dental hygienists, orthodontists, oral-maxillofacial specialists, dental software developers, health informaticians and researchers.

Related standards

• ISO 3950 - Dentistry: designation system for teeth and areas of the oral cavity (related conventional tooth notation)
• ISO 1942 - Dentistry: vocabulary (terminology used by this document)

Keywords: ISO 10394, supernumerary teeth, dental notation, tooth designation, dentistry standard, tooth coding, ISO 3950, dental interoperability.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 10394
First edition
2023-02
Dentistry — Designation system for
supernumerary teeth
Médecine bucco-dentaire — Système de désignation des dents
surnuméraires
Reference number
© 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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles . 1
5 Designation of supernumerary teeth . 1
5.1 Supernumerary teeth located within one of the four quadrants of the mouth . 1
5.1.1 First character . 1
5.1.2 Second character . 2
5.2 Supernumerary teeth located in the midline area . 2
Bibliography . 4
iii
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 3,
Terminology.
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.
iv
Introduction
ISO 3950 has assigned a meaning to most of the available combinations of two digits. As a result,
ISO 3950 cannot be expended to satisfactorily identify supernumerary teeth without introducing
significant changes to its structure. Such changes are seen as undesirable as they would create
significant implementation and data continuity issues. Meeting the need for a standard for the
designation of supernumerary teeth while avoiding the need for undesirable modifications to ISO 3950
therefore requires the introduction of a standard that is independent of ISO 3950.
This designation system for supernumerary teeth retains the two-character format of ISO 3950 to
maximi
...