ISO 15098:2024

Norme
internationale
ISO 15098
Deuxième édition
Médecine bucco-dentaire —
2024-07
Précelles dentaires
Dentistry — Dental tweezers
Numéro de référence
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2024
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
ii
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Classification . 2
5 Exigences . 2
5.1 Conception et dimensions . .2
5.1.1 Généralités .2
5.1.2 Longueur .3
5.1.3 Extrémité active.8
5.1.4 Manche .8
5.1.5 Tige de guidage .8
5.2 Matériau .8
5.3 Dureté (de l’extrémité active) .8
5.4 Finition de surface .8
5.4.1 Toutes les surfaces .8
5.4.2 Finition satinée .9
5.5 Forces d’ouverture et de fermeture .9
5.6 Résistance au retraitement .9
6 Mesurage et méthodes d’essai . 9
6.1 Contrôle visuel .9
6.2 Dimensions .9
6.3 Forces d’ouverture et de fermeture .9
6.4 Résistance au retraitement .10
7 Marquage, étiquetage et instructions d’utilisation .10
7.1 Marquage apposé sur les précelles dentaires .10
7.2 Étiquetage sur l’emballage .11
7.3 Instructions d’utilisation . .11
Bibliographie .12

iii
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux
de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général
confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l'ISO, participent également aux travaux. L'ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document
a été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2
(voir www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner l’utilisation
d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité et à l’applicabilité
de tout droit de propriété revendiqué à cet égard. À la date de publication du présent document, l’ISO
n'avait pas reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa mise en application.
Toutefois, il y a lieu d’avertir les responsables de la mise en application du présent document que des
informations plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à
l'adresse www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne pas avoir identifié tout ou
partie de tels droits de brevet.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l'intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion de
l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir www.iso.org/iso/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 106, Médecine bucco-dentaire, sous-comité
SC 4, Instruments dentaires, en collaboration avec le comité technique CEN/TC 55, Médecine bucco-dentaire,
du Comité européenne de normalisation (CEN), conformément à l’Accord de coopération technique entre le
CEN et l’ISO (Accord de Vienne).
La présente seconde édition annule et remplace la première édition (ISO 15098:2020), qui a fait l’objet d’une
révision technique.
Les principales modifications par rapport à l’édition précédente sont les suivantes:
— la référence normative à l’ISO 7153-1 a été supprimée;
— dans le Tableau 1, « ? » a été remplacé par « 12 »;
— dans le Tableau 2, « b3 » a été reformulé et clarifié.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes se
trouve à l’adresse www.iso.org/fr/members.html.

iv
Norme internationale ISO 15098:2024(fr)
Médecine bucco-dentaire — Précelles dentaires
1 Domaine d’application
Le présent document spécifie les exigences générales et les méthodes d’essai relatives aux précelles dentaires
métalliques des types Meriam et College.
Le présent document n’est pas applicable aux précelles anatomiques et chirurgicales.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique. Pour
les références non datées, la dernière édition de la publication à laquelle il est fait référence s'applique (y
compris tous les amendements).
ISO 1101, Spécification géométrique des produits (GPS) — Tolérancement géométrique — Tolérancement de
forme, orientation, position et battement
ISO 1942, Médecine bucco-dentaire — Vocabulaire
ISO 2768-1, Tolérances générales — Partie 1: Tolérances pour dimensions linéaires et angulaires non affectées
de tolérances individuelles
ISO 6508-1, Matériaux métalliques — Essai de dureté Rockwell — Partie 1: Méthode d'essai
ISO 15223-1:2021, Dispositifs médicaux — Symboles à utiliser avec les informations à fournir par le fabricant —
Partie 1: Exigences générales
ISO 17664-1, Traitement de produits de soins de santé — Informations relatives au traitement des dispositifs
médicaux à fournir par le fabricant du dispositif — Partie 1: Dispositifs médicaux critiques et semi-critiques
ISO 21850-1, Médecine bucco-dentaire — Matériaux pour instruments dentaires — Partie 1: Acier inoxydables
3 Termes et définitions
Pour les besoins du présent document, les termes et les définitions de l'ISO 1942 ainsi que les suivants
s'appliquent.
L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en normalisation,
consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l'adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l'adresse https:// www .electropedia .org/
3.1
précelle dentaire
instrument dentaire guidé manuellement, conçu pour prélever, maintenir ou transférer des éléments et/ou
du matériel dans et hors de la cavité buccale
Note 1 à l'article: Les précelles dentaires sont également appelées pinces et tenailles à coton et sont différentes des
précelles anatomiques.
3.2
précelle dentaire de type College
précelle dentaire de conception particulière pourvue d’une queue droite et d’une extrémité active coudée
ou courbe
3.3
précelles dentaires de type Meriam
précelles dentaires de conception particulière pourvues d’une queue coudée et d’une extrémité active à
contre-angle
3.4
tige de guidage
tige pour guider chacune des branches des pinces quand les précelles sont serrées l’une contre l’autre
4 Classification
Les précelles dentaires sont classées dans les catégories suivantes en fonction de la forme de leur queue et
de leur extrémité active:
— précelles dentaires de type Meriam, c’est-à-dire avec une queue coudée et une extrémité active à contre-
angle (voir Figure 1);
— précelles dentaires de type College, c’est-à-dire avec une queue droite, subdivisée en fonction de la forme
de l’extrémité active:
— coudée (voir Figure 2);
— courbe (voir Figure 3).
5 Exigences
5.1 Conception et dimensions
5.1.1 Généralités
Les précelles dentaires de type Meriam doivent avoir les conceptions indiquées à la Figure 1 et les dimensions
données dans le Tableau 1.
Les précelles dentaires de type College doivent avoir les conceptions indiquées aux Figure 2 et Figure 3 et les
dimensions données dans le Tableau 1.

Tableau 1 — Dimensions des précelles dentaires
b b b h h l r α
1 2 3 1 2
Type de précelle
mm mm mm mm mm mm mm °
avec une tolérance de
±0,2 ±0,2 ±1 ±1 ±1 ±5 référence ±5
Type 1 Meriam 1,3 1,1 12 6 6 160 — 40
Type 2 Meriam 1,6 1,3 13 6,2 6,2 162 43,4
Type 1 College, coudée 1,3 1,1 10 8 — 150 —
...

FINAL DRAFT
International
Standard
ISO/FDIS 15098
ISO/TC 106/SC 4
Dentistry — Dental tweezers
Secretariat: DIN
Médecine bucco-dentaire — Précelles dentaires
Voting begins on:
2024-04-17
Voting terminates on:
2024-06-12
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 SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/FDIS 15098:2024(en) © ISO 2024

FINAL DRAFT
ISO/FDIS 15098:2024(en)
International
Standard
ISO/FDIS 15098
ISO/TC 106/SC 4
Dentistry — Dental tweezers
Secretariat: DIN
Médecine bucco-dentaire — Précelles dentaires
Voting begins on:
Voting terminates on:
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 SUPPOR TING DOCUMENTATION.
© ISO 2024
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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 Reference number
ISO/FDIS 15098:2024(en) © ISO 2024

ii
ISO/FDIS 15098:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Requirements . 2
5.1 Design and dimensions .2
5.1.1 General .2
5.1.2 Length .3
5.1.3 Working end .7
5.1.4 Handle .7
5.1.5 Guide pin .7
5.2 Material .7
5.3 Hardness (of working end) .7
5.4 Surface finish .7
5.4.1 All surfaces .7
5.4.2 Satin finish .7
5.5 Closing and opening forces .8
5.6 Resistance to reprocessing .8
6 Measurement and test methods . 8
6.1 Visual inspection .8
6.2 Dimensions .8
6.3 Closing and opening forces .8
6.4 Resistance to reprocessing .9
7 Marking, labelling and instructions for use . 9
7.1 Marking on the dental tweezers .9
7.2 Labelling on the package .10
7.3 Instructions for use .10
Bibliography .11

iii
ISO/FDIS 15098:2024(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 55, Dentistry, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 15098:2020), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— the previously normatively cited reference ISO 7153-1 has been removed;
— "?" has been replaced with "12" in Table 1;
— "b3" has been reworded and clarified in Table 2.
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
FINAL DRAFT International Standard ISO/FDIS 15098:2024(en)
Dentistry — Dental tweezers
1 Scope
This document specifies general requirements and test methods for metallic dental tweezers of Meriam
type and College type.
This document is not applicable to anatomical tweezers and surgical tweezers.
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 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 1101, Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form,
orientation, location and run-out
ISO 1942, Dentistry — Vocabulary
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method
ISO 15223-1:2021, Medical devices — Symbols to be used with information to be supplied by the manufacturer
— Part 1: General requirements
ISO 17664-1, Processing of health care products — Information to be provided by the medical device
manufacturer for the processing of medical devices — Part 1: Critical and semi-critical medical devices
ISO 21850-1, Dentistry — Materials for dental instruments — Part 1: Stainless steel
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
dental tweezer
hand-guided dental instrument designed to grasp, hold or transfer items and/or material into and out of the
oral cavity
Note 1 to entry: Dental tweezers are also known as cotton forceps and pliers and are different from anatomical
tweezers.
3.2
College type dental tweezer
special design of dental tweezers with straight shank and angled or curved working end

ISO/FDIS 15098:2024(en)
3.3
Meriam type dental tweezer
special design of dental tweezers with angulated shank and contra-angulated working end
3.4
guide pin
pin for guiding the tweezers’ halves when the tweezers are pressed together
4 Classification
Dental tweezers are classified into the following types according to the shape of the shank and working end:
— Meriam type dental tweezers, i.e. with an angulated shank and a contra-angulated working end (see
Figure 1).
— College type dental tweezers, i.e. with a straight shank, subdivided according to the shape of the
working end:
— angled (see Figure 2);
— curved (see Figure 3).
5 Requirements
5.1 Design and dimensions
5.1.1 General
Meriam type dental tweezers shall have the designs shown in Figure 1 and the dimensions given in Table 1.
College type dental tweezers shall have the designs shown in Figure 2 and Figure 3 and the dimensions
given in Table 1.
Tabl
...

ISO/FDIS 15098:2024(E)
ISO/TC 106/SC 4/WG 8
Secretariat: DIN
Date: 2024-04-02
Dentistry — Dental tweezers
Médecine bucco-dentaire — Précelles dentaires
Second edition
FDIS stage
ISO/FDIS 15098:2024(en)
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 01-31 11
E-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO/FDIS 15098:2024(en)
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Requirements . 2
5.1 Design and dimensions . 2
5.1.1 General . 2
5.1.2 Length . 3
5.1.3 Working end . 10
5.1.4 Handle . 10
5.1.5 Guide pin . 10
5.2 Material . 10
5.3 Hardness (of working end). 10
5.4 Surface finish . 10
5.4.1 All surfaces . 10
5.4.2 Satin finish . 11
5.5 Closing and opening forces . 11
5.6 Resistance to reprocessing . 11
6 Measurement and test methods . 11
6.1 Visual inspection . 11
6.2 Dimensions . 11
6.3 Closing and opening forces . 11
6.4 Resistance to reprocessing . 13
7 Marking, labelling and instructions for use . 13
7.1 Marking on the dental tweezers . 13
7.2 Labelling on the package . 13
7.3 Instructions for use . 13
Bibliography . 15

iii
ISO/FDIS 15098:2024(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO [had/had not] received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that this
may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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, in collaboration with the European Committee for Standardization (CEN) Technical Committee
CEN/TC 55, Dentistry, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 15098:2020), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— deletion ofthe previously normatively cited reference ISO 7153-1 from the normative referenceshas been
removed;
— replacement of “?” in Table 1"?" has been replaced with the value “"12" in Table 1”;;
— rewording"b3" has been reworded and clarification of “b3”clarified in Table 2Table 2.
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
ISO/FDIS 15098:2024(en)
Dentistry — Dental tweezers
1 Scope
This document specifies general requirements and test methods for metallic dental tweezers of the Meriam
type and for College type.
This document is not applicable to anatomical tweezers and surgical tweezers.
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 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 1101, Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form,
orientation, location and run-out
ISO 1942, Dentistry — Vocabulary
ISO 2768--1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 6508--1, Metallic materials — Rockwell hardness test — Part 1: Test method
ISO 15223--1:2021, Medical devices — Symbols to be used with information to be supplied by the manufacturer
— Part 1: General requirements
ISO 17664-1, Processing of health care products — Information to be provided by the medical device
manufacturer for the processing of medical devices — Part 1: Critical and semi-critical medical devices
ISO 21850--1, Dentistry — Materials for dental instruments — Part 1: Stainless steel
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— — ISO Online browsing platform: available at https://www.iso.org/obp
— — IEC Electropedia: available at https://www.electropedia.org/
3.1
dental tweezer
hand-guided dental instrument designed to grasp, hold or transfer items and/or material into and out of the
oral cavity
Note 1 to entry: Dental tweezers are also known as cotton forceps and pliers and are different from anatomical tweezers.
3.2
College type dental tweezer
special design of dental tweezers with straight shank and angled or curved working end
ISO/FDIS 15098:2024(en)
3.3
Meriam type dental tweezer
special design of dental tweezers with angulated shank and contra-angulated working end
3.4
guide pin
pin for guiding the tweezers’ halves when the tweezers are pressed together
4 Classification
Dental tweezers are classified into the following types according to the shape of the shank and working end:
— — Meriam type dental tweezers, i.e. with an angulated shank and a contra-angulated working end (see
Figure 1Figure 1).).
— — College type dental tweezers, i.e. with a straight shank, subdivided according to the shape of the
working end:
— — angled: (see Figure 2Figure 2.);
— — curved: (see Figure 3Figure 3.).
5 Requirements
5.1 Design and dimensions
5.1.1 General
Meriam type dental tweezers shall have the designs shown in Figure 1Figure 1 and the dimensions given in
Table 1Table 1.
College type dental tweezers shall have the designs shown in Figure 2Figure 2 and Figure 3Figure 3 and the
dimensions given in Table 1Table 1.
Table 1 — Dimensions for dental tweezers
Tweezer type b1 b2 b3 h1 h2 l r α
Merged Cells
mm mm mm mm mm mm mm °
Tolerancewith a tolerance of
±0,2 ±0,2 ±1 ±1 ±1 ±5 reference ±5
Split Cells
Meriam type 1 1,3 1,1 12 6 6 160 — 40
Meriam type 2 1,6 1,3 13 6,2 6,2 162  43,4
College type 1, angled 1,3 1,1 10 8 — 150 — 40
College type 2, angled 1,5 1,2 12 10 — 152 — 45,7
College type 3, curved 1,3 1,1 10 8 — 150 15 —
See Table 2 for the description of each variable in this table.Key
b1 blade width
b2 blade thickness
b3 blade length
h1 blade height
h shank height
ISO/FDIS 15098:2024(en)
Tweezer type b b b h h l r α
1 2 3 1 2
Merged Cells
mm mm mm mm mm mm mm °
Tolerancewith a tolerance of
±0,2 ±0,2 ±1 ±1 ±1 ±5 reference ±5
Split Cells
l length
r radius of blade
α blade angle
Dimensions without tolerances shall be in accordance with ISO 2768--1. Tolerances of form, orientation and
location shall be in accordance with ISO 1101, if not specified otherwise in this document.
The points of measurement associated with the dimensions are listed in Table 2Table 2.
Test in accordance with 6.16.1 and 6.26.2.
5.1.2 Length
5.1.2.1 Location of measurement points
The location of measurement points for dental tweezers shall be as shown in Table 2Table 2 and in
Figure 1Figure 1 to Figure 3Figure 3.
Table 2 — Measurement points for dental tweezers
Dimension Measurement point
Deleted Cells
Symbol Term Merged Cells
b1 Blade width Measured at a distance of 3 mm from the tip of the working end.
b Blade thickness Measured at a distance of 3 mm from the tip of the working end.
Distance measured from the extreme tip of the blade, parallel to the
b Blade length centreline of the blade, to the blade/shank interface, which is the point
where the serration on the blade ends
Distance measured from the centreline of the instrument, at right angle to
h1 Blade height
the centreline of the instrument, to the farthest extremity of the blade.
Distance measured from the centreline of the instrument, at right angle to
h2 Shank height the centreline of the instrument, to the farthest external surface of the first
bend of the shank.
Distance measured with closed tweezers from the farthest extremity of the
l Length blade, parallel to the centreline of the instrument, to the end of the
instrument.
r Radius of blade Radius of curvature of the inside of the blade.
Angle from the centreline of the blade to the centreline of the
α Blade angle
instrument.
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