EP3570703B1 - Verbesserte zahnbürste - Google Patents

Verbesserte zahnbürste Download PDF

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Publication number
EP3570703B1
EP3570703B1 EP18701012.9A EP18701012A EP3570703B1 EP 3570703 B1 EP3570703 B1 EP 3570703B1 EP 18701012 A EP18701012 A EP 18701012A EP 3570703 B1 EP3570703 B1 EP 3570703B1
Authority
EP
European Patent Office
Prior art keywords
toothbrush
head
central portion
toothbrush according
tooth whitening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18701012.9A
Other languages
English (en)
French (fr)
Other versions
EP3570703A1 (de
Inventor
Ivana Babic
Gustavo De Souza Messias
Michele FAVARETTO
Christopher John Miller
Stefania PERENICH
Camilla PULZONI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever Global IP Ltd
Unilever IP Holdings BV
Original Assignee
Unilever Global IP Ltd
Unilever IP Holdings BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unilever Global IP Ltd, Unilever IP Holdings BV filed Critical Unilever Global IP Ltd
Publication of EP3570703A1 publication Critical patent/EP3570703A1/de
Application granted granted Critical
Publication of EP3570703B1 publication Critical patent/EP3570703B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/06—Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
    • A46B15/0016—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means
    • A46B15/0032—Arrangements for enhancing monitoring or controlling the brushing process with enhancing means with protrusion for polishing teeth
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures

Definitions

  • the present invention is in the field of toothbrushes; and in particular relates to toothbrushes with improved teeth whitening efficacy.
  • tooth-whitening has been one of the most rapidly growing oral care sectors fueled by the consumers' demand for both healthy and cosmetically attractive smiles. Indeed, for the majority of people, the appearance of teeth is very important, and any discolouration or stain that may form on them will affect their aesthetic qualities.
  • the colour of the teeth is influenced by a combination of their intrinsic colour and the presence of discolouration or extrinsic stains which may form in the acquired enamel pellicle.
  • the intrinsic colour of teeth is predominantly determined by the colour properties of the underlying dentine projected through relatively translucent outer enamel layer. Extrinsic stains particularly form on those areas of the teeth which are less accessible to toothbrushing and the abrasive action of toothpaste.
  • extrinsic staining is often promoted by smoking, dietary intake of tanning-rich foods (e.g. red wine) and the use of certain cationic agents such as chlorhexidine, or polyvalent metal salts such as tin and iron.
  • certain cationic agents such as chlorhexidine, or polyvalent metal salts such as tin and iron.
  • Toothbrushes providing whitening benefit in addition to cleaning or polishing benefits are widely known in the art.
  • WO03/015575 discloses a tooth brush with a radially extending rubbery cleaning element.
  • WO11093874 discloses a toothbrush with polishing member dispersed within Y shaped Bristles
  • WO 01/21036 discloses a toothbrush comprising a handle and a head, said head comprising upstanding bristles and at least one upstanding tooth polishing element, characterised in that the tooth polishing element is in the form of a resilient wall-like member and is flanked by bristles.
  • WO2008/103598 discloses an oral care implement or toothbrush including a head and a tooth cleaning element for enhanced cleaning and whitening of the teeth.
  • the tooth cleaning element has a base connected to the head.
  • the base has structure in the form of a concave surface facing a distal region of the head such that dentifrice applied to the head is adapted to be directed towards the distal region of the head.
  • a protrusion extends from the concave surface towards the distal region of the head.
  • the head may include a plurality of concave surfaces that are substantially aligned along a longitudinal axis of the head, and protrusion extends from the curved surface.
  • WO04/026075 discloses a toothbrush comprising a longitudinal resilient member comprising perlite for whitening.
  • toothbrushes in the prior art provides for whitening benefit, improved whitening of teeth still remains to be desired.
  • the present invention provides a toothbrush comprising a handle (1) and a head (2), said head comprising bristles and a tooth whitening element (3) in the form of a resilient wall-like member wherein the tooth whitening element has a central portion (4) running along a longitudinal axis of the head and two lateral portions (5) cupping an end of the central portion wherein two lateral portions (5) are shaped with two spokes or star-shaped with at least 3 spokes (6) and the central portion (4) and the lateral portions (5) are detached from each other, characterised in that the central portion (4) has a straight-line length of 10 mm to 15 mm.
  • the invention provides use of a toothbrush according to the invention for improved dental hygiene.
  • the invention relates to toothbrushes providing improved whitening or stain removal efficacy.
  • the toothbrushes of the invention also provide adequate polishing and plaque removal benefits.
  • the toothbrush is a manual toothbrush.
  • the shape of the toothbrush head is substantially rectangular.
  • the tooth whitening element is in the form of a resilient wall-like member.
  • the wall-like member is preferably made from a material soft enough to provide a whitening benefit to the teeth and so it is preferred that it is made from a material with Shore A hardness of between 5 and 80, preferably from 15 to 50.
  • the tooth whitening element provides a whitening benefit as it is rubbed along the surface of the teeth during brushing. Due to its wall-like structure and its resilient composition it is capable of being elastically deformed.
  • the tooth whitening element represents a lamella which is inserted in between the bristles of the toothbrush.
  • the tooth whitening element is preferably made of thermoplastic elastomers (TPE).
  • the thermoplastic elastomers are made of polymer materials, such as block copolymers.
  • Preferred block copolymers include styrenes (for example styrene ethylene butadiene styrene, or styrene butadiene styrene), polyolefins (for example polypropylene/ethylene propylene diamine modified systems (i. e. synthetic rubber)), polyamides (for example polyamide (2 or polyamide 6), polyesters (for example polyester ester or polyether ester), polyurethanes (for example polyesterurethane, polyetherurethane or polyesteretherurethane).
  • styrenes for example styrene ethylene butadiene styrene, or styrene butadiene styrene
  • polyolefins for example polypropylene/ethylene propylene diamine modified systems (i. e. synthetic rubber)
  • polyamides for example polyamide (2 or poly
  • the whitening element comprises perlite particles.
  • the whitening element can be made by any conventional method, i.e. die-cut or moulded. However, a preferred method of making such a structure would be by injection moulding.
  • the material of the wall-like member may be linked to the head of the toothbrush in any way whether it be by chemical means, mechanical means or both.
  • the tooth whitening element has the advantage of trapping the toothpaste particles against the tooth. These particles will be retained within the contact as the brush is drawn against the flat surface of the tooth.
  • the bristles in the toothbrush have the advantage of carrying the toothpaste particles into the crevices and narrow gaps between teeth, thereby providing a combination of whitening and cleaning benefits.
  • the tooth whitening element of the present invention has a central portion and two lateral portions.
  • the central portion (4) of the tooth whitening element (3) runs preferably continuously along the longitudinal axis of the head (2).
  • central and the lateral portions are detached from each other and preferably at no points join to form a single unit.
  • the central portion of the tooth whitening element runs continuously along the longitudinal axis of the head.
  • the central portion has a straight-line length of 10 mm to 15 mm, preferably 10mm to 13mm, still more preferably 10mm to 12mm.
  • the central portion runs for a distance greater than the length of the head, i.e. the running length is greater than the length of the head, it may be necessary for the central portion to be curved in some fashion. This may be a gentle curve but it may also be curved in a snake-like, sinusoidal or zig-zag fashion.
  • the running length should not be confused with the straight-line length which is the shortest distance between either ends of the central portion.
  • the central portion is in the form of a straight-line.
  • the tooth whitening element preferably has one central portion.
  • the tooth whitening element of the present invention has two lateral portions cupping an end of the central portion.
  • the lateral portion is shaped in order to cup the ends of the central portion.
  • the lateral portion has a V-shaped, a U-shaped or a U-V shaped region to cup the ends of the central portion.
  • the lateral portion has a V-shaped region to cup the ends of the central portion.
  • the lateral portion may be formed as a result of the lateral portion being V-shaped with two spokes or star-shaped with at least 3 spokes, preferably 3 spokes.
  • the spokes may be of the same or different lengths.
  • the length of the spokes may vary from 1mm to 7mm, preferably 2mm to 6mm, more preferably 3mm to 6mm.
  • the spokes may further be straight or curved outwardly at the pointy end.
  • the toothbrush according to the invention may be made from any materials commonly used in the art.
  • the handle and head of the brush can be moulded from polyolefins such as polypropylenes and polyethylenes, polyamides such as nylons, and polyesters such as polyethylene terephthalate.
  • polyolefins such as polypropylenes and polyethylenes
  • polyamides such as nylons
  • polyesters such as polyethylene terephthalate.
  • suitable materials include polymethylmethacrylate, styrene acrylonitrate and cellulose esters, for example cellulose propionate.
  • the bristles of the brush may be made from a flexible material suitable for use in dental hygiene.
  • materials suitable for the bristles are polyamides such as nylon or polyesters such as polybutylene terephthalate.
  • the present invention provides for use of a toothbrush according to the invention for improved dental hygiene.
  • Figure 1 shows a schematic drawing of the toothbrush according to the invention.
  • the toothbrush comprises a head (2) and a handle (1).
  • the head has a tooth whitening element (3) having two portions, a central portion (4) and lateral portions (5).
  • the lateral portions have spokes (6).
  • the head also shows bristle tufts (7).
  • Figure 2 shows the result of comparison of the 3 toothbrushes of Example 3.
  • Colour blue (first bar) indicates the toothbrush according to the invention
  • colour green (third bar) indicates Oral B flat trim toothbrush
  • colour red (second bar) indicates Signal toothbrush.
  • the toothbrush according to the invention was compared to an existing toothbrush in the market known for its whitening benefit and sold under the brand name Signal (White System Ex Italy 2016).
  • the apparatus used in this example were the following:
  • % Stain Re moved L * Brushed ⁇ L * Stained L * Pumiced ⁇ L * Stained ⁇ 100
  • toothbrushes A and B were tested using an experimental design matrix ensuring random allocation of bristles tested in the 4 troughs of the brushing machine.
  • the results are summarized in Table 1.
  • Statistical analysis of the data was performed via JMP 11 (statistical software from SAS). The comparison using Tukey-Kramer HSD test was carried out to assess if the differences, between products, were statistically significant.
  • Table 1 shows the mean of percentage of stain removal with the relative standard deviation value and the standard error value for each tested products.
  • the above table shows that statistical differences were found in terms of stain removal efficacy or whitening.
  • the toothbrush according to the present invention is seen to be performing better than Signal toothbrush.
  • the toothbrush according to the invention was compared to an existing toothbrush in the market sold under the brand name Signal to evaluate the cleaning performance by measuring the amount of plaque which remains in the inter-dental spaces after a circular brushing movement.
  • the apparatus used in this example were the following: Brushing machine : having a combination of co-linear and cross-brushing modes, it and approximates to typical circular brushing motions observed in subjects.
  • Apparatus for measuring the plaque removal Whiteness was measured with a spectrophotometer where 'L' in the L* a* b* Colour System is recorded for crevice empty, crevice full and crevice following brushing.
  • a palette knife was used to spread the paste in the crevices on the plates and the excess was leveled off on the plate surface.
  • the toothbrush was soaked in water for 5 minutes to soften the bristles.
  • the head of the toothbrush was then placed perpendicularly in the gripping unit of the brushing machine in a manner that the tuft was not compressed during and after it was being placed.
  • the values of the full and empty plates were measured.
  • Six measurements in the two central crevices (three measurements for each of the crevices: one in the middle and one in each sides) were taken and the average was calculated.
  • the teeth plate prepared with plaque filling was put in a specific container and saliva was added to cover the entire plate. The container was placed in the machine holder.
  • the toothbrush according to the invention used in this example has the same specifications as in example 1.
  • toothbrushes A and B were tested for plaque removal.
  • Table 2 shows the mean of percentage of plaque removal with the relative standard deviation value for each tested products.
  • Unilever's Signal (A) (190 grams) Toothbrush according to the invention (B) (190 grams) L (empty) L (full) L (foll. brushing) % of removal L (empty) L (full) L (foll.
  • the above table shows that the test products were statistically equal.
  • the toothbrush according to the present invention is seen to be performing similar to Signal toothbrush.
  • the toothbrush according to the invention was compared to existing toothbrushes in the market sold under the brand name Signal and Oral B to evaluate its polishing ability.
  • Test Product A Unilever's Signal Toothbrush B Toothbrush according to the invention C Oral B Flat trim
  • the gloss value of each tile was measured using a Sheen Micro-gloss Meter at 60o/60o (incident/measured) angle. For each tile, initial gloss measurements were taken, then the Perspex surface was dulled using abrasive paper, and the gloss value was measured again. This gave the maximum and minimum gloss values of the tile, from which the percent gloss was then calculated.
  • toothbrushes A, B and C were tested for polishing ability.
  • Figure 2 shows the results at the different time points. Overall it can be concluded that toothbrush according to the invention (indicated by colour blue in figure 2 ) is superior in polishing action compared to Oral B flat trim toothbrush (indicated by colour green in figure 2 ) and statistically similar in performance to Signal toothbrush (indicated by colour red in figure 2 ).

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  • Brushes (AREA)

Claims (8)

  1. Zahnbürste, die einen Griff (1) und einen Kopf (2) umfasst, wobei der Kopf Borsten und ein Element (3) zum Weißen der Zähne in der Form eines elastischen wandartigen Elements umfasst, wobei das Element zum Weißen der Zähne einen zentralen Abschnitt (4), der entlang einer Längsachse des Kopfs verläuft, und zwei quer verlaufende Abschnitte (5), die sich am Ende des zentralen Abschnitts erheben, umfasst, wobei die zwei quer verlaufenden Abschnitte (5) mit zwei Speichen oder sternförmig mit wenigstens drei Speichen (6) ausgebildet sind und der zentrale Abschnitt (4) und die quer verlaufenden Abschnitte (5) voneinander getrennt sind, dadurch gekennzeichnet, dass der zentrale Abschnitt (4) eine geradlinige Länge von 10 mm bis 15 mm aufweist.
  2. Zahnbürste nach Anspruch 1, wobei der zentrale Abschnitt (4) des Elements (3) zum Weißen der Zähne durchgehend entlang der Längsachse des Kopfs (2) verläuft.
  3. Zahnbürste nach einem der vorhergehenden Ansprüche, wobei die Speichen (6) gleiche oder unterschiedliche Längen haben.
  4. Zahnbürste nach einem der vorhergehenden Ansprüche, wobei die Speichen (6) eine Länge von 1 mm bis 7 mm haben.
  5. Zahnbürste nach einem der vorhergehenden Ansprüche, wobei die Speichen (6) gerade oder gebogen sind.
  6. Zahnbürste nach einem der vorhergehenden Ansprüche, wobei das Element (3) zum Weißen der Zähne einen zentralen Abschnitt (4) aufweist.
  7. Zahnbürste nach einem der vorhergehenden Ansprüche, wobei das Element (3) zum Weißen der Zähne eine Lamelle darstellt.
  8. Zahnbürste nach einem der vorhergehenden Ansprüche, wobei das Element (3) zum Weißen der Zähne Perlit umfasst.
EP18701012.9A 2017-01-23 2018-01-17 Verbesserte zahnbürste Active EP3570703B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17152544 2017-01-23
PCT/EP2018/051132 WO2018134270A1 (en) 2017-01-23 2018-01-17 A toothbrush

Publications (2)

Publication Number Publication Date
EP3570703A1 EP3570703A1 (de) 2019-11-27
EP3570703B1 true EP3570703B1 (de) 2024-10-16

Family

ID=57868125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18701012.9A Active EP3570703B1 (de) 2017-01-23 2018-01-17 Verbesserte zahnbürste

Country Status (3)

Country Link
EP (1) EP3570703B1 (de)
CN (1) CN110213979B (de)
WO (1) WO2018134270A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001021036A1 (en) * 1999-09-17 2001-03-29 Unilever N.V. Toothbrush
WO2003015575A1 (en) * 2001-08-14 2003-02-27 Unilever N.V. Electric toothbrush
WO2004026075A1 (en) * 2002-09-20 2004-04-01 Unilever N.V. Brush device
WO2008103598A1 (en) * 2007-02-23 2008-08-28 Colgate-Palmolive Company Oral care implement
WO2011093874A1 (en) * 2010-01-29 2011-08-04 Colgate-Palmolive Company Oral care implement
WO2016105359A1 (en) * 2014-12-23 2016-06-30 Colgate-Palmolive Company Oral care implement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6276021B1 (en) * 1999-10-08 2001-08-21 Colgate-Palmolive Company Toothbrush having a bristle pattern providing enhanced cleaning
US6817054B2 (en) * 2002-08-09 2004-11-16 Colgate-Palmolive Company Toothbrush
US7089621B2 (en) * 2002-09-20 2006-08-15 Colgate-Palmolive Company Toothbrush

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001021036A1 (en) * 1999-09-17 2001-03-29 Unilever N.V. Toothbrush
US20020124337A1 (en) * 1999-09-17 2002-09-12 Unilever Home & Personal Care Usa, Division Of Conopco, Inc. Toothbrush
WO2003015575A1 (en) * 2001-08-14 2003-02-27 Unilever N.V. Electric toothbrush
WO2004026075A1 (en) * 2002-09-20 2004-04-01 Unilever N.V. Brush device
WO2008103598A1 (en) * 2007-02-23 2008-08-28 Colgate-Palmolive Company Oral care implement
WO2011093874A1 (en) * 2010-01-29 2011-08-04 Colgate-Palmolive Company Oral care implement
WO2016105359A1 (en) * 2014-12-23 2016-06-30 Colgate-Palmolive Company Oral care implement

Also Published As

Publication number Publication date
BR112019010950A2 (pt) 2019-10-01
WO2018134270A1 (en) 2018-07-26
EP3570703A1 (de) 2019-11-27
CN110213979A (zh) 2019-09-06
CN110213979B (zh) 2022-04-26

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