ISO/TR 3630-6

ISO/DTR 3630--6:2023(E)
ISO TC 106/SC 4/WG 9
Secretariat: DIN
Dentistry — Endodontic instruments — Part 6: Numeric coding system
Médecine bucco-dentaire — Instruments d'endodontie— Partie 6: Système de codification numérique
First edition
Date: 2023-05-16

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07-14
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ISO/DTR 3630-6:2023(E)
© ISO 2023
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© ISO 2023 – All rights reserved iii

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ISO/DTR 3630-6:2023(E)
Contents
Foreword . 5
Introduction . 6
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Numeric coding system for endodontic instruments . 1
5 Numeric code for specific characteristics of endodontic instruments . 2
5.1 Type of endodontic instrument .2
5.1.1 General . 2
5.1.2 Cross-sections . 2
5.1.3 Tips . 4
5.1.4 Movement . 6
5.2 Nominal size .7
5.3 Taper of working part .7
5.4 Designated length.8
5.5 Material .8
5.6 Type of handle or shank.9
5.7 Examples . 10
Annex A (informative) Examples of instruments with numeric coding system . 11
Bibliography . 16

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ISO/DTR 3630-6:2023(E)
Foreword
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This document was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 4, Dental
instruments, .
A list of all parts in the ISO 3630 series can be found on the ISO website.
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ISO/DTR 3630-6:2023(E)
Introduction
This document is intended to replace ISO 6360-5 for replaces the number coding of endodontic instruments
of ISO 3630-5 and provides a modified number coding format is provided in this document. .
This document also makes provisions for the information provided in all of the parts of the ISO 6360 series
and as such is the only document needed foron endodontic instruments. in the ISO 3630 series.
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TECHNICAL REPORT ISO/DTR 3630-6:2023(E)

Dentistry — Endodontic instruments — Part 6: Numeric coding system
1 Scope
This document specifies a coding system for specific characteristics of endodontic instruments, with a 12-digit
code identifying general and specific characteristics of instruments or groups of instruments. The numerals
identify the type of instrument, nominal size, taper, length, working part material, type and material of handle
or shank.
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 1942, Dentistry — Vocabulary
ISO 3630--1, Dentistry — Endodontic instruments — Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942 and ISO 3630-1 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/
— IEC Electropedia: available at https://www.electropedia.org/
3.1 Terms and definitions
3.1.1
unspecified
characteristics which are not clearly stated and left to the discretion of the manufacturer
4 Numeric coding system for endodontic instruments
The coding system for endodontic instruments consists of 12 digits in six groups, as follows:
000 000 00 00 0 0
A B C D E F
Table 1 and Figure 1 show the groupings.
Table 1 — Numeric groups
Gr Descri Subcla 00 00 0 0
Inserted Cells
oup ption0 use
Inserted Cells
00 refere
Inserted Cells
nces0
00
Inserted Cells
 A B C D E F
Table 1 and Figure 1 show the groupings.
Table 1 — Numeric groups
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ISO/DTR 3630-6:2023(E)
Group Description Subclause
A type of instrument 5.1
B nominal size of the working part 5.2
C taper of the working part 5.3
D designated length of the instrument 5.4
E material of the working part 5.5
F type of handle or shank 5.6

Key
A type of instrument D designated length of the instrument
B nominal size of the working part E material of the working part
C taper of the working part F type of handle or shank
Figure 1 — Coding key
5 Numeric code for specific characteristics of endodontic instruments
5.1 Type of endodontic instrument
5.1.1 General
Group A consists of three digits which identify the type of the instrument as specified in Table 2.
The group is subdivided into three elements, illustrating the cross-section of the active part, the tip of the
instrument and the movement of the instrument during its usage. The movement is thatthe one carried out
by the clinician when using the instrument during an endodontic procedure.
5.1.2 Cross-sections
Digit 1 describes the cross-section of the instrument from “0” to “9”.
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ISO/DTR 3630-6:2023(E)
Table 2 — Description of the cross-sections of the instrument
Cross-sections
PicturalPictorial
Digit 1 Description Example
illustration
0 circular cross-section plugger /spreader

1 1 flute H-file

2 flutes, diamond shape or
2 B2 / Enlarger
parallelogram cross-section

3 flutes, triangular cross-section
3 K-file / K-reamer

4 flutes, square and/or
4 K-file
rectangular cross-section

5 spira
...