ISO 8325:2023 歯科 — 回転器具の試験方法 | ページ 2

Foreword

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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 third edition cancels and replaces the second edition (ISO 8325:2004), which has been technically revised.

The main changes compared to the previous edition are as follows:

• a) some definitions have been added such as for rotary instruments;
• b) list of suitable measuring instruments have been deleted from 4.3;
• c) tolerances for the measuring instruments have been clarified in 5.1;
• d) the formula for neck strength test has been replaced in 5.11 by a technically based Formula in 5.11.4;
• e) Annex A has been added for the deduction of Formula (3).

Introduction

To check the conformity of dental rotary instruments against relevant instrument standards, it is indispensable to conduct tests on the basis of harmonized test methods in order to achieve comparable test results. In the respective instrument standards for dental rotary instruments, reference is made to the test methods specified in this document.

1 Scope

This document specifies general test methods for rotary instruments used in dentistry. These test methods are used for measuring the dimensional characteristics, neck strength and surface roughness of rotary instruments, such as burs, cutters, polishers, grinding instruments and rotary instruments used for oral surgery such as drills and countersinks.

Specific tests are specified in the respective instrument standards, if available.

This document does not specify test methods for materials used for rotary instruments.

This document is not applicable to endodontic instruments. For endodontic instruments, see ISO 3630-1.

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.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 1942, ISO 21850-1 and the following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses: