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International
Standard
ISO 15098
Second edition
Dentistry — Dental tweezers
2024-07
Médecine bucco-dentaire — Précelles dentaires
Reference number
© ISO 2024
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Published in Switzerland
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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
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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
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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
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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
International Standard ISO 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
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.
Table 1 — Dimensions for dental tweezers
Tweezer type b b b h h l r α
1 2 3 1 2
mm mm mm mm mm mm mm °
with a tolerance of
±0,2 ±0,2 ±1 ±1 ±1 ±5 reference ±5
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 —
Key
b blade width
b blade thickness
b blade length
h blade height
h shank height
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 2.
Test in accordance with 6.1 and 6.2.
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 2 and in Figure 1 to
Figure 3.
Table 2 — Measurement points for dental tweezers
Dimension Measurement point
Symbol Term
b 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
...