US20210289935A1 - Interdental brush having an insertion guidance tip - Google Patents

Interdental brush having an insertion guidance tip Download PDF

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Publication number
US20210289935A1
US20210289935A1 US17/259,019 US201917259019A US2021289935A1 US 20210289935 A1 US20210289935 A1 US 20210289935A1 US 201917259019 A US201917259019 A US 201917259019A US 2021289935 A1 US2021289935 A1 US 2021289935A1
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US
United States
Prior art keywords
filaments
length
filament diameter
along
sub
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.)
Abandoned
Application number
US17/259,019
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English (en)
Inventor
Jan-Inge Larsson
Patrik Werius
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.)
Tepe Munhygienprodukter AB
Original Assignee
Tepe Munhygienprodukter AB
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 Tepe Munhygienprodukter AB filed Critical Tepe Munhygienprodukter AB
Assigned to TEPE MUNHYGIENPRODUKTER AB reassignment TEPE MUNHYGIENPRODUKTER AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LARSSON, JAN-INGE, WERIUS, Patrik
Publication of US20210289935A1 publication Critical patent/US20210289935A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • A46B9/045—Arranged like in or for toothbrushes specially adapted for cleaning a plurality of tooth surfaces simultaneously
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/18—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier the bristles being fixed on or between belts or wires
    • 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
    • A46B9/021—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups arranged like in cosmetics brushes, e.g. mascara, nail polish, eye shadow
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/16—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by wires or other anchoring means, specially for U-shaped bristle tufts
    • 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
    • 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
    • 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
    • A46B2200/108—Inter-dental toothbrush, i.e. for cleaning interdental spaces specifically

Definitions

  • the invention relates to a method of providing an insertion guidance tip at a distal end of an interdental brush.
  • the invention also relates to an interdental brush having an insertion guidance tip at the distal end of the interdental brush.
  • the invention also relates to use of a first set of a plurality of filaments and a second set of a plurality of filaments in an interdental brush to provide an insertion guidance tip at a distal end of the interdental brush.
  • An interdental brush typically comprises a spine and a plurality of bristle filaments secured to the spine.
  • the spine is typically formed from a metal wire being twisted to form the spine and to secure the bristle filaments to the twisted spine.
  • Such interdental brushes are e.g. disclosed in EP 0 680 707 B1, U.S. Pat. No. 4,691,404, EP 1 862 090 B1, U.S. Pat. No. 3,720,975, US2005/257338 A1, and EP 0 294 051 A2.
  • EP 0 680 707 B1 there is disclosed an interdental brush having different bristle thicknesses. It is disclosed that the use of different bristle thicknesses makes it possible to achieve desired sensation of hardness in various zones of the interdental brush.
  • interdental brushes of this kind are difficult to insert the interdental brush into the intended interdental space.
  • the interdental brush is slightly misaligned with the intended interdental space and that as the interdental brush is inserted into the interdental space, the interdental brush causes discomfort by rubbing hard against the gums as the interdental brush is inserted into the interdental space. This is especially true when the user tries to insert the interdental brush into an interdental space at the back teeth.
  • EP 1 862 090 B1 discloses an interdental brush having a resilient transition portion having a hollow cavity. It is disclosed that the spine may be bent into a smooth curve in order to or in response to being inserted into hard-to-reach interdental spaces far back in the mouth. It is also disclosed that the resilient transition portion provides a cushioning effect protecting the gums and teeth from collision damage.
  • U.S. Pat. No. 3,720,975 approaches the problems associated with the insertion of the interdental brush by designing the brush head with a conical shape.
  • the bristles at the distal end is shorter than the bristles closer to the handle. It is said that the foremost bristles being proportioned for initial entry within the space at the cervical portions of two adjacent teeth, thereby to provide an opening wedge for entry of the longer bristles there-behind.
  • a conical brush typically has a relatively short effective stroke length. It quickly becomes too thick as it is inserted into the interdental space.
  • US2005/257338 A1 also discloses an interdental brush having a conical brush. It is also disclosed that there is provided a tapering tip in order to allow the brush to be inserted into an interdental space in a simple manner. There is also disclosed various embodiments having a tapering tip.
  • the shape of the brush head is typically provided by rotating the brush head such that the free ends of the bristles hit a cutting edge.
  • the various shapes disclosed in US2005/257338 A1 would require the provision of cutting edges having complex shapes or the provision of several cutting edges consecutively cutting the bristles such that the brush head is shaped into the desired shape. This would however make the manufacturing process more complicated and costly.
  • This object has been achived by a method of providing an insertion guidance tip at a distal end of an interdental brush, the method comprising:
  • an interdental brush in accordance with this method there is accomplished an improved interdental brush having an insertion guidance tip.
  • filaments having a smaller diameter over a comparably small distal sub-length it becomes possible to provide an insertion guidance tip.
  • the distal end loop, formed by the folded and twisted core member and the filaments fastened in the distal end loop, will compared to prior art designs have a smaller size.
  • the use of the two different sets of filaments and the fact that the second sub-length is comparably small makes it possible to provide a transition in perceived properties close to the distal end.
  • the thinner filaments of at the distal end are perceived as comparably softer than the slightly thicker filaments coming into abutment with the teeth shortly after the tip has been inserted in the interdental space.
  • the thicker filaments will provide a stronger tendency to centre the interdental brush in the interdental space compared to the thinner filaments.
  • the second sub-length has a length extending along less than three, preferably less than two, twists of the core member.
  • a twist is defined as a distance along the longitudinal direction from any first point to a second point at which the strands have swapped place as seen in a plane projection in a plane defined by the longitudinal direction as one vector and a radial direction orthogonally from the longitudinal direction as another vector. This is considered a suitable length providing a distinct perception of an insertion guidance tip.
  • the interdental brush having an insertion guidance tip is significantly easier to manufacture compared to the above discussed prior art attempts involving the use of conical tips.
  • inventive design using thinner filaments over a comparably small distal sub-length makes it possible to provide the insertion guidance tip with the filaments in the first set and in the second set having the same length. It is thus possible to provide an insertion guidance tip using a robust manufacturing process where the filaments are all cut to the same length using a straight cutting edge against which the filaments are cut by rotating the brush section about the twist and rotation axis.
  • side by side along a direction is intended to refer to the fact that the filaments are arranged side by side essentially forming a queue and that this queue extends along said direction.
  • Side by side denotes that they are positioned with their circumferential envelope surfaces facing and abutting each other; rather than being positioned end to end.
  • the line or queue formed by the side by side arranged filaments will extend along a direction whereas some of the filaments, just as in an informal queue formed by people queuing, will be slightly offset from a perfect geometrical line. This is a well-known fact to a person skilled in the art but may still be mentioned to avoid any misunderstandings.
  • the longitudinal extension of the brush portion of which the second sub-length constitutes less than 15% refers to the total extension along which there are filaments. In case there are only a first set of filaments and a second set of filaments, this longitudinal extension of the brush portion is the first sub-length plus the second sub-length. It may also be noted that the core member typically has an extension greater than the extension along which there are filaments. The portion of the core member along which there are no filaments is typically used to attach the core member to a handle.
  • the interdental brush will still present a significant length having thicker filaments providing a significant effective stroke length which makes it easy for the user to accomplish an efficient cleaning of the interdental space.
  • the second sub-length is at least long enough such that the distal end loop formed by the twisting of the core member is filled with filaments of the second set of filaments; i.e. filed with filaments having the smaller filament diameter.
  • the second filament diameter may be between 60-95% of the first filament diameter. This relation between the filament diameters is considered suitable. It will provide suitable reduction in the size of the distal end loop formed by the twisting of the core member compared to the thickness of the twisted core member at any other part of the brush section. It will also provide a suitable reduction in bending resistance, assuming the materials are chosen such that the material stiffnesses are the same or close to each other.
  • the second filament diameter may preferably be between 66-90% of the first filament diameter. This relation between the filament diameters is considered even more suitable. It will provide suitable reduction in the size of the distal end loop formed by the twisting of the core member compared to the thickness of the twisted core member. It will also provide a suitable reduction in bending resistance, assuming the materials are chosen such that the material stiffnesses are the same or close to each other.
  • the filaments of the first set of filaments and the second set of filaments may be formed of the same material or of different materials having material stiffnesses such that the filaments having the second filament diameter have a reduced bending resistance compared to the filaments having the first filament diameter.
  • the filaments of the first set of filaments and the filaments of the second set of filaments are formed of the same material but with different filament diameters, whereby the filaments having the second filament diameter have a reduced bending resistance compared to the filaments having the first filament diameter.
  • bending resistance is related to the actual length of the filament; a short filament having a diameter and being formed of a material will be perceived as having a greater bending resistance compared to a longer filament of the same diameter and the same material.
  • the filaments of the first set and the second set have the same length through-out the length of the brush section, or that the filaments at the distal end have a length being at least 75%, preferably at least 90%, of the length of the filaments in the first set of filaments.
  • an interdental brush having a brush portion comprising:
  • a core member being folded into two strands extending alongside each other along a longitudinal direction and being twisted about an axis extending along the longitudinal direction
  • a first set of filaments are arranged side by side along a first longitudinal sub-length of the twisted core member, the filaments of the first set of filaments having a first filament diameter
  • a second set of filaments are arranged along a second longitudinal sub-length of the twisted core member, the filaments of the second set of filaments having a second filament diameter
  • the second sub-length has a length along the longitudinal direction being less than 15% of a longitudinal extension of the brush portion and extending along less than three twists of the core member, thereby providing an insertion guidance tip at the distal end of the interdental brush.
  • the second filament diameter may be between 60-95% of the first filament diameter.
  • the second filament diameter may preferably be between 66-90% of the first filament diameter.
  • the filaments of the first set of filaments and the second set of filaments may be formed of the same material or of different materials having material stiffnesses such that the filaments having the second filament diameter have a reduced bending resistance compared to the filaments having the first filament diameter.
  • the filaments of the first set of filaments and the filaments of the second set of filaments are formed of the same material but with different filament diameters, whereby the filaments having the second filament diameter have a reduced bending resistance compared to the filaments having the first filament diameter.
  • the second sub-length may have a length extending along less than two twists of the core member.
  • a first set of filaments having a first filament diameter and being arranged side by side along a first longitudinal sub-length of a brush portion
  • a second set of filaments having a second filament diameter and being arranged along a second longitudinal sub-length of the brush portion, the second filament diameter being smaller than the first filament diameter, the second longitudinal sub-length being positioned at a distal end of the interdental brush, and the second sub-length having a length along the longitudinal direction being less than 15% of a longitudinal extension of the brush portion and extending along less than three twists of the core member,
  • the second filament diameter may be between 60-95%, preferably between 66-90%, of the first filament diameter.
  • the filaments of the first set of filaments and the second set of filaments may be formed of the same material or of different materials having material stiffnesses such that the filaments having the second filament diameter have a reduced bending resistance compared to the filaments having the first filament diameter.
  • the filaments of the first set of filaments and the filaments of the second set of filaments are formed of the same material but with different filament diameters, whereby the filaments having the second filament diameter have a reduced bending resistance compared to the filaments having the first filament diameter.
  • the second sub-length may have a length extending along less than two twists of the core member.
  • the invention may also in short be said to relate to an interdental brush comprising a first set of filaments arranged along a first longitudinal sub-length and having a first filament diameter, and a second set of filaments arranged along a second longitudinal sub-length and having a second filament diameter, wherein the second filament diameter is smaller than the first filament diameter, wherein the second longitudinal sub-length is positioned at the distal end of the interdental brush, and wherein the second sub-length has a length along the longitudinal direction being less than 15% of a longitudinal extension of the brush portion.
  • FIG. 1 is a side view of a plurality of filaments positioned side by side between two strands of a folded core member.
  • FIG. 2 is a top plan view of the core member and filaments of FIG. 1 .
  • FIG. 3 is a top plan view of an interdental brush having an insertion guidance tip formed from the set-ups shown in FIGS. 1 and 2 .
  • FIG. 4 is an enlargement of the distal end of the interdental brush as indicated by the dashed circle in FIG. 3 .
  • FIG. 5 is a schematic flow chart of a method for producing interdental brushes having an insertion guidance tip.
  • an interdental brush 1 having a brush portion 2 .
  • the brush portion 2 comprises a core member 3 and a plurality of filaments 10 , 20 .
  • the core member 3 is folded into two strands 3 a, 3 b extending alongside each other along a longitudinal direction L and twisted about an axis A extending along the longitudinal direction L.
  • the plurality of filaments 10 , 20 are fastened between the two strands 3 a, 3 b and extending radially from the twisted core member 3 and are arranged side by side along a helix H extending along the longitudinal direction L thereby forming the brush portion 2 .
  • a first set of filaments 10 are arranged side by side along a first longitudinal sub-length L 1 of the twisted core member 3 .
  • the filaments 10 of the first set of filaments have a first filament diameter D 1 .
  • a second set of filaments 20 are arranged along a second longitudinal sub-length L 2 of the twisted core member 3 .
  • the filaments 20 of the second set of filaments have a second filament diameter D 2 .
  • the second filament diameter D 2 is smaller than the first filament diameter D 1 .
  • the second longitudinal sub-length L 2 is positioned at a distal end 5 of the interdental brush 1 .
  • the second sub-length has a length L 2 along the longitudinal direction L being less than 15% of a longitudinal extension L 3 of the brush portion 2 .
  • the longitudinal extension or length L 3 refers to the total extension along which there are filaments 10 , 20 .
  • the core member 3 typically have an extension greater than the extension along which there are filaments 10 , 20 .
  • the portion of the core member 3 along which there are no filaments 10 , 20 is typically used to attach the core member 3 to a handle (as indicated in FIG. 3 ). In case there are only a first set of filaments and a second set of filaments, this longitudinal extension L 3 of the brush portion 2 is the first sub-length L 1 plus the second sub-length L 2 .
  • an insertion guidance tip B at the distal end 5 of the interdental brush 1 .
  • the method may be said to comprise the steps; positioning, twisting, end cutting and attaching to handle (as indicated in FIG. 5 ). It may be noted that the method comprising the steps positioning, twisting, end cutting and attaching to handle may comprise other steps before, after or in-between these steps.
  • the steps may be separate steps performed one after the other. Such steps may e.g. be performed at different working stations in a manufacturing machine, but two or more steps may also be performed one after the other in one working station. However, two or more of the steps may also be performed as a single step.
  • the steps are performed as steps one after the other in the disclosed order.
  • the two steps of positioning and twisting is performed one after the other in the disclosed order in a single working station.
  • the positioning step comprises positioning a plurality of filaments 10 , 20 side by side along a brush portion 2 extending along a longitudinal direction L between two strands 3 a, 3 b of a core member 3 , wherein the two strands 3 a, 3 b of the core member 3 extending alongside each other along the longitudinal direction L and being formed by folding the core member 3 .
  • the act or step of positioning comprises positioning a first set of filaments 10 side by side along a first longitudinal sub-length L 1 ′ of the brush portion 2 and positioning a second set of filaments 20 along a second longitudinal sub-length L 2 ′ of the brush portion 2 .
  • the plurality of filaments 10 , 20 are held by a filament holder 33 as indicated in FIG. 2 .
  • the filament holder 33 is typically fed with filaments in a plurality of sets of filaments. One or more such sets form the first set of filaments 10 and one or more such sets form the second set of filaments 20 .
  • the filaments 10 of the first set of filaments each have a first filament diameter D 1 and the filaments 20 of the second set of filaments each have a second filament diameter D 2 , wherein the second filament diameter D 2 is smaller than the first filament diameter D 1 .
  • the second longitudinal sub-length L 2 ′ is positioned at the distal end 5 of the interdental brush 1 .
  • the second sub-length has a length L 2 ′ along the longitudinal direction being less than about 15% of a longitudinal extension L 3 ′ of the brush portion 2 .
  • the brush portion 2 has the configuration as shown in FIGS. 1 and 2 .
  • the twisting step comprises twisting the two strands 3 a, 3 b about an axis A along the longitudinal direction L to form a twisted core member 3 and to thereby fasten the filaments 10 , 20 between the two strands 3 a, 3 b such that the filaments 10 , 20 extend radially from the twisted core member 3 and becomes arranged side by side along a helix H extending along the longitudinal direction L.
  • the twisting may e.g. be performed with the use of two rotatable pinchers 31 , 32 holding two opposite ends of the folded core member 3 as indicated in FIG. 2 .
  • the two pinchers 31 , 32 are configured to rotate in opposite directions relative to the axis A such that the core member 3 becomes twisted.
  • one of the pinchers 31 , 32 may be held stationary.
  • the brush portion 2 has the configuration shown in FIGS. 3 and 4 . However, note that in FIG. 3 the brush portion 2 has also been attached to a handle 4 . It may be noted that the total length L 3 ′ and the sub-lengths L 1 ′ and L 2 ′ are slightly longer when the filaments 10 , 20 of the first and second set of filaments are positioned side by side as in FIGS. 1 and 2 compared to the total length L 3 and the sub-lengths L 1 and L 2 , respectively, after the twisting of the two strands 3 a, 3 b as shown in FIGS. 3 and 4 . The proportions and measurements refers to the situation after the twisting of the two strands 3 a, 3 b as shown in FIGS. 3 and 4 .
  • the second sub-length L 2 is at least long enough such that the distal end loop formed by the twisting of the core member is filled with filaments of the second set of filaments 20 ; i.e. filed with filaments having the smaller filament diameter D 2 .
  • the second sub-length L 2 has a length such that the filaments having the smaller filament diameter D 2 occupies the end loop and one more twist, i.e. two twists.
  • an interdental brush in accordance with this method there is accomplished an improved interdental brush having an insertion guidance tip.
  • filaments having a smaller diameter over a comparably small distal sub-length it becomes possible to provide an insertion guidance tip.
  • the distal end loop, formed by the folded and twisted core member and the filaments fastened in the distal end loop, will compared to prior art designs have a smaller size.
  • the use of the two different sets of filaments and the fact that the second sub-length is comparably small makes it possible to provide a transition in perceived properties close to the distal end.
  • the thinner filaments of at the distal end may be perceived as comparably softer than the slightly thicker filaments coming into abutment with the teeth shortly after the tip has been inserted in the interdental space.
  • the thicker filaments will provide a stronger tendency to centre the interdental brush in the interdental space compared to the thinner filaments.
  • the reduced size distal end loop and by providing a transition in perceived properties close to the distal end the user will experience this as the interdental brush aiding in guiding its way into the interdental space.
  • the line or queue formed by the side by side arranged filaments will extend along a direction where some of the filaments, just as in an informal queue formed by people queuing, will be slightly offset from a perfect geometrical line. This is a well-known fact to a person skilled in the art but may still be mentioned to avoid any misunderstandings.
  • an interdental brush having a passage hole diameter defined by a main portion of the brush portion rather than distal end loop.
  • the passage hole diameter may e.g. be determined using the method disclosed in standard ISO 16409:2016 with title: “Dentistry—Oral care products—Manual interdental brushes”.
  • the second filament diameter D 2 is preferably between 60-95% of the first filament diameter D 1 .
  • the second filament diameter D 2 is more preferably between 66-90% of the first filament diameter D 1 .
  • the filaments 10 , 20 of the first set of filaments 10 and the second set of filaments 20 are in one embodiment formed of the same material such that the filaments 20 having the second filament diameter D 2 have a reduced bending resistance compared to the filaments 10 having the first filament diameter D 1 .
  • the filaments 10 , 20 of the first set of filaments 10 and the second set of filaments 20 are formed of different materials. The materials are chosen such that they have material stiffnesses relative to each other such that the filaments 20 having the second filament diameter D 2 have a reduced bending resistance compared to the filaments 10 having the first filament diameter D 1 .
  • bending resistance is related to the actual length of the filament; a short filament having a diameter and being formed of a material will be perceived as having a greater bending resistance compared to a longer filament of the same diameter and the same material.
  • the filaments of the first set and the second set have the same length through-out the length of the brush section, or that the filaments at the distal end have a length being at least 75%, preferably at least 90%, of the length of the filaments in the first set of filaments.
  • the second sub-length L 2 is at least long enough such that the distal end loop formed by the twisting of the core member is filled with filaments of the second set of filaments 20 ; i.e. filed with filaments having the smaller filament diameter D 2 .
  • the second sub-length has preferably a length L 2 extending along less than three, preferably less than two, twists of the core member 3 .
  • a twist is defined as a distance along the longitudinal direction L from any first point to a second point at which the strands 3 a, 3 b have swapped place as seen in a plane projection in a plane defined by the longitudinal direction as one vector and a radial direction orthogonally from the longitudinal direction as another vector.
  • the second sub-length L 2 has a length such that the filaments having the smaller filament diameter D 2 occupies the end loop and one more twist, i.e. two twists (see especially the enlargement in FIG. 4 ).
  • the disclosure relates to a use of a first set of filaments 10 and second set of filaments 20 in an interdental brush 1 to provide an insertion guidance tip B at the distal end 5 of the interdental brush 1 .
  • the filaments of the first set of filaments 10 have each a first filament diameter D 1 and are arranged side by side along a first longitudinal sub-length L 1 of a brush portion 2 .
  • the filaments of the second set of filaments 20 have each a second filament diameter D 2 and are arranged along a second longitudinal sub-length L 2 of the brush portion 2 .
  • the second filament diameter D 2 is smaller than the first filament diameter D 1 .
  • the second longitudinal sub-length L 2 is positioned at a distal end 5 of the interdental brush 1 .
  • the second sub-length has a length L 2 along the

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
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US17/259,019 2018-07-11 2019-07-11 Interdental brush having an insertion guidance tip Abandoned US20210289935A1 (en)

Applications Claiming Priority (3)

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SE1850882 2018-07-11
SE1850882 2018-07-11
PCT/EP2019/068638 WO2020011901A1 (en) 2018-07-11 2019-07-11 Interdental brush having an insertion guidance tip

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PCT/EP2019/068638 A-371-Of-International WO2020011901A1 (en) 2018-07-11 2019-07-11 Interdental brush having an insertion guidance tip

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US18/502,525 Continuation US20240172864A1 (en) 2018-07-11 2023-11-06 Interdental brush having an insertion guidance tip

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US17/259,019 Abandoned US20210289935A1 (en) 2018-07-11 2019-07-11 Interdental brush having an insertion guidance tip
US18/502,525 Pending US20240172864A1 (en) 2018-07-11 2023-11-06 Interdental brush having an insertion guidance tip

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US (2) US20210289935A1 (ja)
EP (1) EP3820327A1 (ja)
JP (1) JP7480111B2 (ja)
KR (1) KR20210060435A (ja)
CN (1) CN112822961A (ja)
AU (1) AU2019300323A1 (ja)
BR (1) BR112021000293A2 (ja)
WO (1) WO2020011901A1 (ja)
ZA (1) ZA202100863B (ja)

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US20150033489A1 (en) * 2012-03-09 2015-02-05 Geka Gmbh Twisted brush with parallel bristles at the distal end

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JP7480111B2 (ja) 2024-05-09
WO2020011901A1 (en) 2020-01-16
EP3820327A1 (en) 2021-05-19
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ZA202100863B (en) 2022-09-28

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