EN ISO 22254:2005

Dentistry - Manual toothbrushes - Resistance of tufted portion to deflection (ISO 22254:2005)

ISO 22254:2005 specifies a test method for determining the resistance of the tufted portion of manual toothbrushes to deflection. This International Standard is applicable to toothbrushes having a conventional flat trim design and may not be applicable to toothbrushes with other designs. The results obtained with this International Standard may not correspond to consumer perceptions of the stiffness of toothbrush bristles.

Zahnheilkunde - Handzahnbürsten - Biegefestigkeit der Besteckungsfläche (ISO 22254:2005)

In dieser Internationalen Norm wird ein Prüfverfahren zur Bestimmung der Biegefestigkeit der Besteckungsfläche von Handzahnbürsten festgelegt. Diese Internationale Norm gilt für Zahnbürsten, die ein konventionelles, planes Design haben und ist für Zahnbürsten mit einem anderen Design unter Umständen nicht anwendbar. Die Ergebnisse, die mit dieser Internationalen Norm erhalten werden, können von den Wahrnehmungen des Verbrauchers bezüglich der Borstenhärte einer Zahnbürste abweichen.

Art dentaire - Brosses à dents manuelles - Résistance à la déflexion de la surface garnie (ISO 22254:2005)

L'ISO 22254:2005 spécifie une méthode d'essai permettant de déterminer la résistance à la déflexion de la surface garnie des brosses à dents manuelles. La présente Norme internationale est applicable aux brosses à dents classiques, à surface garnie plane, et peut ne pas s'appliquer aux brosses à dents d'autres modèles. Les résultats obtenus avec la présente Norme internationale peuvent ne pas correspondre à ce que les consommateurs perçoivent s'agissant de la dureté des filaments de brosse à dents.

Zobozdravstvo – Ročne zobne ščetke – Odpornost krtačnega predela na upogib/pregib (ISO 22254:2005)

General Information

• Status: Published
• Publication Date: 14-Aug-2005
• Withdrawal Date: 27-Feb-2006
• ICS: 97.170 - Body care equipment
• Technical Committee: CEN/TC 55 - Dentistry
• Drafting Committee: CEN/TC 55 - Dentistry
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 23-Feb-2010
• Completion Date: 23-Feb-2010
• Ref Project: SIST EN ISO 22254:2005 - Dentistry - Manual toothbrushes - Resistance of tufted portion to deflection (ISO 22254:2005)

Relations

• Replaces: EN 28627:1990/AC1:1990 - Dentistry - Stiffness of tufted area of tooth-brushes
• Effective Date: 22-Dec-2008
• Replaces: EN 28627:1990 - Dentistry - Stiffness of tufted area of tooth-brushes (ISO 8627:1987)
• Effective Date: 22-Dec-2008

Overview

EN ISO 22254:2005 (ISO 22254:2005) specifies a standardized test method for determining the resistance of the tufted portion of manual toothbrushes to deflection. It applies to toothbrushes with a conventional, flat-trim design and provides reproducible laboratory procedures to measure tuft resistance (and-optionally-derive tufted-area-based stiffness). The standard clarifies that measured resistance may not match consumer perceptions of bristle stiffness.

Key topics and technical requirements

• Scope: Test method for the tufted portion of manual toothbrushes with conventional flat trim; may not apply to other head designs.
• Sampling: Test five as‑manufactured brush heads (handle removed).
• Conditioning: Cut off head at the neck, weigh to 0.5 g, immerse in water (grade 3 per ISO 3696) at (37 ± 2) °C for 90 s, shake off excess water and mount.
• Test machine:
  • Brushing table with five rods (3.2 ± 0.1 mm diameter) spaced with centres at (8.2 ± 0.1) mm.
  • Gripping block holding brush head with a preload of (5 ± 0.05) N.
  • Load cell 0–20 N accurate to 0.05 N.
  • Driving unit to slide the table at 10–50 mm/s for at least the length of the brush head.
• Procedure: Start sliding within (3 ± 0.25) min after immersion; perform five cycles, record the maximum force from the load cell in each direction, take the mean of the two directions as the resistance to deflection for each brush; report mean and standard deviation for five brushes.
• Optional stiffness calculation (Annex A): After testing, remove tufts, measure tufted area A (planimeter on photograph/tracing), then compute stiffness S = F / A (N/cm²), where F is resistance to deflection.

Applications and users

EN ISO 22254 is practical for:

• Toothbrush manufacturers - product development, design comparison, and quality control.
• Independent testing laboratories - repeatable lab verification of tuft resistance.
• Regulatory and procurement bodies - specification and compliance checks for oral care equipment.
• R&D and material scientists - comparing filament arrangements, tuft density and head designs. Practical uses include product specification, batch verification, comparative testing between designs, and supporting marketing claims when combined with consumer perception studies.

Related standards

• ISO 1942 (Dentistry - Vocabulary) - terms and definitions used.
• ISO 3696 (Water for analytical laboratory use) - water quality for conditioning.
• EN 28627:1990 - earlier European standard superseded by EN ISO 22254:2005.

Keywords: ISO 22254, EN ISO 22254:2005, manual toothbrush testing, resistance to deflection, tufted area, toothbrush stiffness, brushing table, load cell, toothbrush standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2005
1DGRPHãþD
SIST EN 28627:2000
SIST EN 28627:2000/AC1:2000
=RER]GUDYVWYR±5RþQH]REQHãþHWNH±2GSRUQRVWNUWDþQHJDSUHGHODQD
XSRJLESUHJLE,62
Dentistry - Manual toothbrushes - Resistance of tufted portion to deflection (ISO
22254:2005)
Zahnheilkunde - Handzahnbürsten - Biegefestigkeit der Besteckungsfläche (ISO
22254:2005)
Art dentaire - Brosses a dents manuelles - Résistance a la déflexion de la surface garnie
(ISO 22254:2005)
Ta slovenski standard je istoveten z: EN ISO 22254:2005
ICS:
97.170 Oprema za nego telesa Body care equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 22254
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2005
ICS 97.170 Supersedes EN 28627:1990
English Version
Dentistry - Manual toothbrushes - Resistance of tufted portion to
deflection (ISO 22254:2005)
Art dentaire - Brosses à dents manuelles - Résistance à la Zahnheilkunde - Handzahnbürsten - Biegefestigkeit der
déflexion de la surface garnie (ISO 22254:2005) Besteckungsfläche (ISO 22254:2005)
This European Standard was approved by CEN on 8 August 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22254:2005: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 22254:2005) has been prepared by Technical Committee ISO/TC 106
"Dentistry" in collaboration with Technical Committee CEN/TC 55 "Dentistry", the secretariat of
which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by February 2006, and conflicting national
standards shall be withdrawn at the latest by February 2006.

This document supersedes EN 28627:1990.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Cyprus,
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 22254:2005 has been approved by CEN as EN ISO 22254:2005 without any
modifications.
INTERNATIONAL ISO
STANDARD 22254
First edition
2005-08-15
Dentistry — Manual toothbrushes —
Resistance of tufted portion to deflection
Art dentaire — Brosses à dents manuelles — Résistance à la déflexion
de la surface garnie
Reference number
ISO 22254:2005(E)
©
ISO 2005
ISO 22254:2005(E)
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ii © ISO 2005 – All rights reserved

ISO 22254:2005(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 22254 was prepared by Technical Committee ISO/TC 106, Dentistry, Subcommittee SC 7, Oral care
products.
This first edition cancels and replaces ISO 8627:1987.

ISO 22254:2005(E)
Introduction
The stiffness of the tufted area of a manual toothbrush has been of great concern for both consumers and
manufacturers. This International Standard provides a test method for determining the resistance of the tufted
portion to deflection, which could be used to derive a stiffness as described in Annex A. However, this
International Standard does not cover stiffness of manual toothbrushes and its classification. For stiffness
determination, the measurement of the tufted area is required, but the result of the measurement varies over a
wide range depending on the method of the measurement and the shape of the tuft holes. Therefore, the
tufted area and stiffness determinations are described in Annex A. Since the perception of stiffness differs
amongst different countries, stiffness may be classified differently in each country.

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