BS EN ISO 22254:2005 – Dentistry — Manual toothbrushes — Resistance of tufted portion to deflection

BS EN ISO 22254:2005 - Dentistry — Manual toothbrushes — Resistance of tufted portion to deflection

1 Scope
This International Standard specifies a test method for determining the resistance of the tufted portion of anual 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 filaments.
2 Normative references
The following referenced documents are indispensable for the application 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 (all parts), Dentistry — Vocabulary
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 1942-1 to ISO 1942-5 and the following apply.
3.1
manual toothbrush
hand-powered device primarily for cleaning surfaces of teeth, the working end of which carries filaments
3.2
brush head
working end of a toothbrush to which the filaments are attached
3.3
filament
single strand within the brush head
3.4
tuft
group of filaments gathered together and attached to the brush head
3.5
tuft hole surface
surface of the tuft holes, which can be convex, triangular or plane and which is limited by a peripheral tangent line to the outer tuft holes
3.6
tuft hole plane
plane between the base of the tufts (where they meet the face of the brush) at the top of the brush head and the base of the tufts at the bottom of the brush head
3.7
tufted area
linear projection of the tuft hole surface on to the tuft hole plane
NOTE An alternative definition is: area surrounded by a peripheral tangent line to the outer tufts where they meet the tuft hole plane.
3.8
brush neck
part of the toothbrush which joins the brush head to the handle
3.9
resistance to deflection
resisting force of the tufts to deflection under a force of 5 N, applied at right angles to the tuft hole plane
4 Sampling
The toothbrushes obtained for testing shall be as-manufactured and not modified in any way, except as specified for this International Standard.
Five brushes shall be tested.
The sampling method and the means of procurement are not covered by this International Standard and should be subject to agreement between the interested parties.
BS EN ISO 22254:2005 – Dentistry — Manual toothbrushes — Resistance of tufted portion to deflection

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