ISO/TR 3630-6:2023
(Main)Dentistry — Endodontic instruments — Part 6: Numeric coding system
Dentistry — Endodontic instruments — Part 6: Numeric coding system
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.
Médecine bucco-dentaire — Instruments d'endodontie — Partie 6: Système de codification numérique
General Information
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Standards Content (Sample)
TECHNICAL ISO/TR
REPORT 3630-6
First edition
2023-11
Dentistry — Endodontic
instruments —
Part 6:
Numeric coding system
Médecine bucco-dentaire — Instruments d'endodontie —
Partie 6: Système de codification numérique
Reference number
© ISO 2023
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ii
Contents Page
Foreword .iv
Introduction .v
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 . 3
5.1.4 Movement . 4
5.2 Nominal size . 5
5.3 Taper of working part. 5
5.4 Designated length . 6
5.5 Material . 6
5.6 Type of handle or shank . 6
5.7 Examples . 7
Annex A (informative) Examples of instruments with a numeric coding system.8
Bibliography .11
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
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www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 4, Dental
instruments.
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Any feedback or questions on this document should be directed to the user’s national standards body. A
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iv
Introduction
This document replaces the number coding of endodontic instruments of ISO 6360-5 and provides a
modified number coding format.
This document also makes provisions for the information on endodontic instruments in the ISO 3630
series.
v
TECHNICAL REPORT ISO/TR 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
unspecified
characteristic which is 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
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 the 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”.
Table 2 — Description of the cross-sections of the instrument
Cross-sections
Digit 1 Pictorial illustration Description Example
0 circular cross-section plugger /spreader
1 1 flute H-file
2 flutes, diamond shape or
2 B2 / Enlarger
parallelogram cross-section
3 3 flutes, triangular cross-section K-file / K-reamer
4 flutes, square and
...
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