Toothbrush and toothbrush head with double-sided triple-branch head elements made of elastic materials and method of using the same

Abstract

The invention relates to the field of toothbrushes, and more particularly to a toothbrush (10) comprising a toothbrush head (12) made of three treatment structures (14, 16, 17) adapted to simultaneously treat opposite maxillary and mandibular teeth, wherein two of the treatment structures (14, 16) are substantially opposed to each other along the same plane and the third treatment structure (17) is placed between the previous two opposing treatment structures (14, 16).

Description

[0001]PWO-I 026-002TOOTHBRUSH AND TOOTHBRUSH HEAB WITH DOUBLE-SIDED TRIPLEBRANCH HEAD ELEMENTS MADE OF ELASTIC MATERIALS AND METHOD OFUSING THE SAME5 Cross Reference to Related ApplicationsThis application claims the benefit ofU.S. Provisional Application No. 63 / 771,176, filedon March 13, 2025 and U.S. Provisional Application 63 / 642.994, filed on May 6, 2024, the contentof the entirety of which is explicitly incorporated herein by reference and relied upon to define10 features for which protection may be sought hereby as it is believed that the entirety thereofcontributes to solving the technical problem underlying the invention, some features that may bementioned hereunder being ofparticular importance.Identification of parties concerned15 The Applicant of the present intellcctual property matter is INTIV A.G. of Switzerland.The inventors ofthe invention described in this patent documentation are Joel Suter, Fabien Gigon,Luden Vouillamoz, Johann Rohner, and Gregory Dourde. The designers of decorative aspectsshown in the attached drawings are Luca Gruber and Sandro Reginelli. At the time offihing, JohnB. Moetteli and the firm Da Vinci Partners LLC of Switzerland represent the Applicant.20 Copyright & Legal NoticeA portion ofthe disclosure ofthis patent document contains material which is subject tocopyright protection. The Applicant has no objection to the facsimile reproduction by anyone ofthe patent document or the patent disclosure as it appears in the Patent and Trademark Office25 patent file or records, but otherwise reserves all copyright rights whatsoever. Further, noreferences to third party patents or articies made herein is to be construed as an admission that thepresent invention is not entitled to antedate such material by virtue ofprior invention. Still further,the use in the title of “OMNI“ should not be construed as an admission that this designation isgeneric or descriptive under the trademark laws.30 1 PWO-1026-002 Technical FieldThe present application relates generaily to a toothbrush with a toothbrush head made byat least three brushes for enhanced oral hygiene.5 Background ArtThe vast majority of the toothbrushes used in the world arc conventional manualtoothbrushes with plastic handles and nylon brushes. Manual toothbrushes might be made of10 different materials such as metal alloy, wood or natural fibers.In the last decade, sonic electric toothbrushes became more and more popular. Electrictoothbrushes have rotating or vibrating brush head, comprising sensors or not. Key playcrs areProcter & Gamble (Oral-B), J&J, Colgate-Palmolive (Hum), Philips (Sonicare).Key players are focusing on reducing the final price of cicctric-powcred toothbrush. If15 not, they arc focusing on innovativc smart «AI»-powcred / «convcntional» and «sidc-to-side» (c.g.triple bristles) / sonic / clectric-powcrcd toothbrushes, followed by digital advertiscmcnt or to get«recommended» by hcalth carc profcssionals.A newcomcr 011 the market such as Zcrobrush Inc (US) arc trying to enter thc ficld withfully customizcd full mouth solutions bascd 011 personal 3D scan ofthc oral cavity.20 Another newcomcr on the market, Balcnc (ZIZ DENTAL CARE) (Spain), is trying toenter the field with ncw materials and toothbrush geometries (loaded with active chemicalcompounds such as antibiotics or not) rcplacing conventional nylon brushes.Extemally driven mechanical toothbrush solutions arc also available and arc dcscribed inW02022184954A1, cntitied TOOTHBRUSH HEAD AND MANUFACTURING METHOD, as25 weil as in EP4052608A1, USD974768S, W02006048692A1 cntitlcd DOUBLE-SIDEDTOOTHBRUSH WITH HTNGED HANDLE, HRP20041036A2, FR3047892A1, cntitled TETEDE BROSSAGE POUR BROSSE A DENTS ELECTRIQUE, ET BROSSE A DENTSELECTRIQUE ASSOCIEE, as weil as CN104473426A entitled ROLLER TYPETOOTHBRUSH.30 These approachcs prcsent limitations. In particular, what is ncedcd is a highly adaptivetoothbrush that offcrs flcxibility to adjust to a wider rangc ofmouth and / or tooth sizes.Problem Statement2PWO-I 026-002The present invention addresses the problem ofproviding an improved toothbrush that caneffectively clean teeth surfaces with adaptive or substantially constant brushing pressure, whilealso accommodating different user preferences and needs.5 The present invention provides solutions for a toothbrush comprising a toothbrush headmade of three treatment structures adapted to simultaneously treat opposite maxillary andmandibular teeth. In addition, two of the treatment structures arc substantially opposed to eachother along the same plane and the third treatment structure 15 placed between the previous two10 opposing treatment structures. Advantageously the treatment structures are mounted on movablestructures. At least one of the treatment structures is dispiaceable along an axis X substantiallyperpendicular to the mesio-distal axis MD, allowing for adaptive or substantially constant brushingpressure 011 teeth surfaces when the toothbrush head is subjected or driven with lateral and / orrotative movements. The toothbrush further comprises movable elastic structures that enable15 dispiacement(s) of at least one of the treatment structures along the X axis, ensuring efficientcleaning. Additionally, the toothbrush is designed to be adaptable to the size of the user‘s mouth,with a toothbrush head that minimizes contact between treatment constructs of different elements.The treatment constructs arc, for example, in the shape ofbristles. The elements ofthe toothbrusharc at least the treatment structures. The relative angular position 0 of the treatment constructs of20 each element of the toothbrush head is set by the shape of a shaft / handpiece interface elementwhich crosses and connects the elements ofthe toothbrush head. The angular position 0 is chosenin such a way that the treatment constructs do not contact or only minimally contact each other(i.e. 0-20% ofthe external surface ofthe bristle is in contact with one or more other bristles) whenthe toothbrush head is freewheeling (i.e. not being applied against the teeth). Ofcourse, when in25 use, the treatment constructs flex and so can come into contact with adjacent structures. In certainembodiments, for improving efficiency ofthe teeth cleaning process, the treatment constructs canbe designed in such a way that, even during use, they do not contact each other.In addition, the toothbrush can be used with different types of handpieces and can be30 customized for users such as children, disabled persons, and those with dentures. lt can also beused with a dental motor, optionally with ISO interface, which can be programmable and linkedor connectable to a dedicated app. The toothbrush‘s rotating motion around the X axis is alsoprogrammable, allowing for continuous or alternating rotation, adjustable speed, torque limit, and3PWO-I 026-002movement angles. Safety features include torque detection to limit pressure on the gum andmeasures of relative dispiacement triggering motor behavior for enhanccd control and protcction.Summary ofthe Invention:5 Disclosed is a toothbrush with a toothbrush head made ofthree treatment structures adaptedto simultaneously treat opposite maxillary and mandibular teeth. In this regard, the toothbrushhead according to the present invention can be defined as a double-sided triple-brush headelements. In particular, two of the treatment structures arc substantially opposed to cach other10 along the same plane and the third treatment structure is placcd between the previous two opposingtreatment structures. Advantageously, the trcatment structures arc brush structures havingtreatment constructs which are preferably bristles. The treatmcnt constructs of the two opposingtreatment structures arc at least partially opposed to each other. At least one of the treatmentstructures is displaceablc along an axis X substantially perpendicular to the mesio-distal axis MD15 applying adaptive or substantially constant brushing pressure on teeth surfaccs, for example, withlateral movements (i.e. mesio-distal movements) and, optionally, rotative movements (whichprcfcrably happens in a plane perpendicular to the palatal and lingual planes). This dispiacementcan be duc to the elasticity ofthe materials used for thc toothbrush head (i.e. elastic material(s) ofthe treatment structures and / or elastic material(s) ofthe treatment constructs). Advantageously the20 treatment structures arc mounted on movable structures, prcferably movable elastic structures.Advantageously, thc treatment structurcs include treatment constructs made of nylon, silicone,thermoplastic elastomers (TPE), thermoplastic polyurethane (TPU), natural fibers, polymers, gel,or any combination thereof. The bristles arc preferably in the shape of spikes.The toothbrush according to the present invention allows for adaptive or substantially25 constant brushing pressure on teeth surfaces with lateral and rotative movements, ensuringthorough cleaning.The movabic elastic structures in the toothbrush allow for displacements of the treatmentstructures along the X axis, providing flexibility and adaptability to different tooth shapes andsizes. In some embodiments, the treatment structures don‘t move relative to cach other along axis30 X, but the elasticity of the treatment constructs and / or the treatment structures is responsible forthe adaptability ofthe toothbrush head to the mouth ofthe user.The toothbrush is designed to be size-adaptive, ensuring a comfortable fit in the user‘smouth and enhancing ease ofuse.4PWO-I 026-002The toothbrush provides the advantage of sharpened brushing performance due to thestructure of the toothbrush head, which effcctively clean teeth surfaccs with lateral and rotativemovements. Thc toothbrush offers the advantage of adaptive brushing pressure, as the movable elastic5 structures allow adaptive or substantially constant pressure to be applied on teeth surfaces.The toothbrush provides the advantage of flexible brushing, as the treatment structuresmounted on movable elastic structures can easily adapt to the contours ofthe teeth and gums.The toothbrush provides the advantage of individualized manufacturability, as thetoothbrush can be designed with different sizes and head elements to accommodate users of10 various ages arid dental conditions.When actuated by a motor so as to rotate around the X axis, the toothbrush offers theadvantage of controllable brushing pressure, because when the relative displacement of themovable elastic structures, or a predetermined deformation of the treatment structures / constructs,is detected, this information is used to trigger motor behavior, allowing for adjustments in speed,15 torque limit, and movement angles.In a development, the toothbrush further comprises movable elastic structures allowingdisplacements ofthe treatment structures along the X axis.The treatment structures ofthe toothbrush head, i.e. the Buccal / Labial and Palatal / LingualElements treatment structurcs, are dispiaceable along a displacement span, allowing for precise20 and targeted cleaning of specific tooth surfaces. One way of accomplishing this is to allow formovement or “play“ between ends stops placed on the shaft / handpiece interface so as to allow theposition of the brushing elements to self-align with the teeth, thereby providing more uniformbrushing pressure on the teeth.The displacement span is made using elastic elements (such as one or more springs) or25 pneumatic elements (such as a cylinder-piston arrangements) or electric actuated elements whichinsist on one or more of the treatments elements of the toothbrush head, and which are designedfor providing predetermined characteristics in terms of displacement and / or resistance to themovement ofthe treatments element(s).In some embodiments, the dispiacement span is made using intrinsic elasticity ofthe element of30 the toothbrush head (i.e. treatment structure and its supports). In other words, one or both betweenthe treatment structures and the treatment constructs (i.e. bristles) arc elastic so that they candisplace along an axis X substantially perpendicular to the mesio-distal axis MD.5 PWO-1026-002 The toothbrush head comprises treatment constructs placed 011 the treatment structures ina relative (to each treatment structure) angular position e set to minimize contact betweentreatment structures during use, prevdnting damage to the toothbrush head and ensuring longevity.In a development, the toothbrush further comprises a handle and / or head size being adapted5 to the size ofthe user‘s mouth.The toothbrush according to the present invention provides adaptive or substantiallyconstant brushing pressure on teeth surfaces, promoting effective plaquc removal and maintainingoral hygiene.The movable ciastic structures in the toothbrush allow for displacement of the treatment10 structures, enabling efficient cleaning even in hard-to-reach areas ofthe mouth.The toothbrush is designed to be size-adaptive, ensuring a comfortable grip and ease ofusefor users ofdifferent ages and hand sizes.The toothbrush is preferably made with materials that present elastic properties, forimproving the adaptability ofthc toothbrush elements to the mouth ofthe user.15 In a development, the toothbrush further comprises a toothbrush head being designcd in away that the treatment constructs of Buccal / Labial and Palatal / Lingual Elements only come intolimited contact with Occlusal Element treatment constructs along the Buccal / Labial andPalatal / Lingual Elements treatment structures dispiacement span.The treatment structures ofthe toothbrush head are displaceable along the X axis, allowing20 for customized brushing pressure and adaptability to individual tooth surfaces.The toothbrush head comprises treatment constructs of one treatment structure placed inan angular position 0 with respect to another treatment structure, for minimizing the risk ofdamage to the toothbrush head and ensuring durability ofthe treatment structures.In a dcvelopment, the toothbrush furthcr comprises treatment constructs being placed in an25 angular position 0 to minimize contact between the Buccal / Labial and Palatal / Lingual Elementstreatment structures during use.The toothbrush according to the present invention provides adaptive or substantiallyconstant brushing pressure on teeth surfaces, ensuring thorough cleaning and plaque removal.The toothbrush is designed to be size-adaptive, ensuring a comfortable fit in the use?s30 mouth and enhancing ease ofuse.In a development, the toothbrush further comprises an angular position 0 of treatmentconstructs of different treatment structure being set by the shape ofthe Shaft / Handpiece interfaceelement. 6 PWO-1026-002 51015202530 angles according to their preferences and dental needs.7 PWO-1026-002 The torque detection feature ensures safcty during brushing by limiting the pressure on thegum, thereby preventing potential gum recession or other oral health issues caused by excessiveforce. The measure of relative dispiacement of elements enables the toothbrush to respond5 intelligcntly to changes in brushing conditions, such as siowing down or stopping whencncountering obstacies, ensuring efficient and effective cleaning.The measure of relative dispiacement of elements enables the toothbrush to respond intelligentlyto changes in brushing conditions, such as actively adapting the relative position betweenelements, ensuring efficient and effective cleaning.10 In a development, the toothbrush further comprises a torque dctection triggering motorbehavior for safety purposes, by, for example, limiting the pressure on the gum to avoid futuregum recession or for specific functions.In a development, the toothbrush further comprises a force detection triggering an actuator,by, for example, actively adapting the relative position between elements, ensuring efficient and1 5 effective cleaning.The toothbrush?s programmable rotating motion around the X axis provides users with theflexibility to switch between continuous and alternating rotation, allowing for different brushingtechniques and targeting specific areas ofthe mouth.20 The torque detection triggering motor behavior enhances safety by preventing excessivepressure on the gum, reducing the risk ofgum recession and other oral health problems associatedwith aggressive brushing.The measure of relative displacement of elements enables the toothbrush to adapt itsmovement based on the brushing surface, ensuring optimal cleaning performance on different25 tooth surfaces and contours.In a development, the toothbrush further comprises a measure ofthe relative dispiacementof elements triggering motor behavior such as slowing down, stopping, or changing movementdirection. In a developmcnt, the toothbrush further comprises a measure of the force betweeri elements30 triggering actuator, by, for example, actively adapting the relative position between elements.The toothbrush‘s programmabic rotating motion around the X axis allows users to adjustthe speed, torque limit, and movement angles, providing a personalized brushing experience thatcaters to individual preferences and dental conditions.8 PWO-1026-002 The torquc dctection triggering motor behavior ensures the toothbrush applies theappropriatc pressure on the gum, preventing potential gum recession and promoting overall oralhealth. The measure of relative displacement of movable elements cnables the toothbrush to5 respond to changes in brushing conditions, such as adjusting movement direction or speed,ensuring thorough cleaning and preventing missed areas.Brief Description ofthe Drawings:10 The present disclosurc is illustrated by way of example and not limited by theaccompanying figures in which like reference numerals indicate similar elements. Embodimentsofthe application will now be described with reference to the attached drawings:FIG. 1 is a perspectivc view of the toothbrush of the invention, according to some15 embodiments ofthe present disclosure.FIG. 2 is an exploded view ofthe toothbrush of FIG. 1, according to some embodimentsofthc present disclosure.FIG. 3A is a perspective view of the toothbrush, according to some embodiments of thepresent disclosure.20 FIG. 3B is a perspective view of the toothbrush, according to some cmbodiments of thepresent disclosure.FIG. 4 is a schematic view of the toothbrush, according to another embodiment of thepresent disclosure.FIG. 5A is a cross-sectional side view ofthe toothbrush, according to some embodiments25 ofthe present disclosure.FIG. 5B is a perspective view ofthc toothbrush, according to the embodiment of FIG. 5A.FIG. 5C is a cross-sectional side view of the clutch of the toothbrush, according to theembodiment of FIG. 5A.FIG. 5D is a perspcctive view ofthe clutch ofthe toothbrush, according to the embodiment30 of FIG. 5A.FIG. 6A is a side view ofthe toothbrush, according to some embodiments ofthe presentdisclosure. FIG. 6B is a cross-sectional view ofthe toothbrush of FIG. 6A, along line C-C.FIG. 6C is a cross-sectional view ofthe toothbrush of FIG. 6A, along line B-B.9 PWO-1026-002 FIG. 7 is a side view of the toothbrush, according to some embodiments of the presentdisclosure. FIG. 8 is a side view ofthe toothbrush with a motor, according to anothcr embodiment ofthe present disclosure.5 FIG. 9A is a perspective view of the toothbrush having a first connection configuration,according to some embodiments ofthe present disclosure.FIG. 9B is a perspective view ofthe toothbrush having the first connection configurationin operation, according to some embodiments ofthe present disclosure.FIG. 1OA is a perspective view of the toothbrush having a second connection10 configuration, according to some embodiments ofthe present disclosure.FIG. lOB is a perspective view of the toothbrush having the second connectionconfiguration in operation, according to some embodiments ofthe present disclosure.FIG. hA is a perspective view ofthe toothbrush having a third connection configuration,according to some embodiments ofthe present disclosure.15 FIG. 11B isa perspective view ofthe toothbrush having the third connection configurationin operation, according to some embodiments ofthe present disclosure.FIG. 12 is a schematic view showing dental terminology of the prior art, useful for thecomprehension ofthe instant application.FIG. 13 is a partial side view of another embodiment of the toothbrush according to the20 invention.FIG. 14A is a perspective view ofthe toothbrush head according to FIG. 13.FIG. 14B is a side view ofthe toothbrush head of FIG. 14A.FIG. 14C is a sectional view ofthe toothbrush head along axis AA of FIG. 14B.FIGs. 15A and 15B are two different side views of two different embodiments of the25 toothbrush head of FIG. 13 with elastic and actuated elements, respectively.FIG. 16A is a perspective view of a first configuration of use of the toothbrush head ofFIG. 13.FIG. 16B is a schematic side view of the position of the treatment constructs of thetoothbrush head according to FIG. 16A.30 FIG. 16C is a perspective view ofa second configuration ofuse ofthe toothbrush head ofFIG. 13.FIG. 16D is a schematic side view of the position of the treatment constructs of thetoothbrush head according to FIG. 16C.10PWO-I 026-002FIGs. 17A and 17B are two different configurations ofuse ofthe toothbrush hcad of FIG.FIGs. 18A, 18B and 18C arc different configurations ofuse ofthe toothbrush of FIG. 13.FIGs. 19A and 19B arc diffcrent configurations ofuse ofthe toothbrush of FIG. 13.5 FIG. 20 is a schematic representation of a motorized handpiece sensor feedback loop ofthe toothbrush according to the invention.FIG. 21 is a schematic representation of a head sensor feedback loop of the toothbrushaccording to the invention.10 Detailed Description of the Preferred EmbodimentThe following dcscription is not intended to limit the scope ofthe invention in any wayas it is exemplary in nature, serving to describe the best mode of the invention known to theinventors as of the filing date hereof. Consequently, changes may be made in the arrangementand / or function ofany ofthc elements described in the exemplary embodiments disclosed herein15 without departing from the spirit and scope ofthe invention.The following tooth surfaces chart (and also FIG. 12) is useful to understanding thisdescription as its terms arc referred to therein. Table: Tooth surfaces chart for rapid reviewThe system according to this invention relates to a manual and / or electromechanical11 PWO-1026-002 actuatcd triple brushed, double sided toothbrush. In other words, a toothbrush with six contactsurfaces per two teeth, considering three surfaces for each tooth - i.e. buccal, lingual andocclusal / incisal surfaces for a mandibular, and a corresponding, maxillary tooth).The invention is also related to a multisided toothbrush head (brushing the three5 sides / surfaces ofa set of upper and lower teeth at the same time, while also cleaning and massagingthe gum-teeth interface and interdental space) applying adaptive or substantially constant brushingpressure on teeth surfaces (adapted to teeth width).Referring now to FIG. 1, the toothbrush 10 of the invention has a toothbrush head 12. Thebrush head 12 compriscs two treatment structures 14 and 16, facing each other. Each of the10 treatment structures 14, 16 comprises a plurality of bristles 36. In some embodiments, bristles 36can be substituted, or added to, radially extending fins or radial paddlcs (not shown).Advantageously, at least one of the treatment structures 14, 16 is mounted on movableelastic structures. In some embodiments, the elastic structures are flexible structures integral to thetreatment structures 14, 16, as shown in FIG. 1 and FIG. 19A. In these embodiments the choice15 of the material of the treatment structure 14, 16 is important for ensuring the flexibility of thetreatment structures 14, 16 and allowing the tooth to correctly fit between the treatment structures14, 16 for cleaning tooth‘s surfaces. In some other embodiments, the elastic structures are separatesprings 20, 22, as shown in FIG. 4. In this configuration (i.e. as shown in FIG. 4), the elasticstructures 20, 22 are mounted on a support 40. The section ofthe support 40 can be L-shaped, as20 shown in FIG. 4. Advantageously the support 40 can rotate around one of its axes, during use.According to FIG. 4, the revolution happens around axis X. Axis X represents also the axis ofshaft 24. Shaft 24 is used to maintain together the treatment structures 14, 16, 17.The treatment structures 14, 16 are capable of displacing along an axis X on a handpieceinterface element 25 of a shaft 24 that is substantially perpendicular to the mesio-distal axis 2625 (See FIGs. 5A and 7). The toothbrush 10 applies adaptive or substantially constant brushingpressure on teeth surfaces 30 with lateral movements, along axis 26, and rotative movements 32,in a plane perpendicular to the axis 26, as shown in FIGs. 1 and 7. FIG. 4 also illustrates that theelastic structures 20,22 allow displacements 34 ofthetreatment structurcs 14, 16 along the X axis,making the elastic structure 20, 22 movable, at least along the axis X. Additionally, the size ofthe30 toothbrush head 12 is adapted to the size ofthe user‘s mouth.The brush head 12 also comprises at least one middle trcatmcnt structure 17, hereinafteralso defined as occlusal element, or treatment construct. The middle treatment structure 17 isaddressed to clean the occlusal surface ofthe teeth.12PWO-I 026-002According to some embodiments of the invention, the treatment structures 14, 16, 17comprise one or more treatment constructs. Treatment constructs can also be realized toaccomplish more than one function or different functions. Thus, in some embodiments, thetreatment constructs can be made as cleaning constructs, polishing constructs, whitening5 constructs, freshening / deodorizing constructs, fluorinating constructs, or a combination thereof. Insome embodiments, treatment constructs are in the shape of bristles, or radially extending fins orradial paddlcs (not shown), or a combination thereof. Advantageously, bristles 36 of theBuccal / Labial element 14‘ and Palatal / Lingual element 16‘ come only into limited contact withthe Occlusal Element 17‘ along the dispiacement span 34 ofthe Buccal / Labial and Palatal / Lingual1 0 elements‘ treatment structures 14, 16. Advantageously, the middle treatment structure 17 is placedin an angularly offset position 0 to minimize contact between the treatment structures 14, 16during use, as shown in FIGs. 3B and 6B. Advantageously, the angular position 0 is set by thecross-sectional shape 47 ofthe shaft / handpiece interface element 25.Note that although not shown in the drawings, the treatment structure 17 can optionally be15 placed on both sides of the treatment structures 14, 16 (see, for example, area 15 in FIG. 5B) inorder to allow for the cleaning ofthe inside ofthe cheek and the tongue.According to the invention, the toothbrush head 12 is attachable to a handpiece through ahandpiece interface 52, 54, 56, shown in FIGs. 9-11.The elements ofthe toothbrush head 12 and its handpiece interface 52, 54, 56 can be used20 with different types of handpieces, including manual 60, electro-mechanical 62, and sonichandpieces. The elements ofthe toothbrush head 12 can be adapted in form or size to cater to userssuch as children, disabled persons, and those with dentures. The toothbrush 10 can be used with adental motor 66, optionally with an ISO 1797 interface. According to some embodiments, thedental motor 66 can be programmable and linked to a dedicated app. According to some25 embodiments, the rotating motion 32 ofthe toothbrush 10 around the X axis can be programmed,including parameters such as continuous or alternating rotation, speed, torque limit, and movementangles. The toothbrush 10 may include a torque detector 67 (typically disposed within the housing62 of the toothbrush handpiece) or can be configured to implement a torque detector functionprovided by current / voltage monitoring in the motor‘s driving electronics. The detection oftorque30 can trigger motor behavior, for example, for safety purposes, such as limiting pressure on the gum76 to avoid future gum recession, or for other specific functions. Additionally, a measure of therelative dispiacement 34 ofthe treatment structures (for example via a displacement ofthe elasticstructures 20, 22) can trigger motor behavior, such as slowing down, stopping, or changingmovement direction.13 PWO-1026-002 In some embodimcnts, a measure ofthe relative displacement 34 ofthe elastic structures20, 22 can trigger actuator behavior, such as actively adapting the pressure of the treatmentsstructure 14,16 on the teeth, according to teeth width, where the teeth width is detected by sensors,such as sensors integrated in the toothbrush head 12.5 The invention is preferably based on two treatment structurcs 14, 16 movable along theX axis, comprising a middle treatment structure 17, for implementing a mechanical solution whichuses an optimized design. Advantageously some preferred materials can be selected for the scopeofthe invention, as mentioned hereinafter.Head of the toothbrush comprises treatment structures 14, 16, preferably mounted 01110 movable elastic structures 20, 22, allowing displacements ofthe treatment structures 14, 16 alongan axis X substantially perpendicular to the mesio-distal axis MD, applying adaptive orsubstantially constant brushing pressure 011 teeth surfaces.The head elements 14, 16, 17, 20, 22, 25 improve brushing efficiency by ensuring that alltooth surfaces, the gum-teeth interface and interdental areas are brushed. The brushes 14, 16, 1715 are specifically adapted to the area to be cleaned, increasing brushing efficiency and reducing therisk ofpoor brushing.The toothbrush head 12 can be used with a manual handpiece, an electro-mechanicalhandpiece, or a sonic handpiece (in which case the treatment structures 14, 16, 17 need not rotatearound the X axis). This allows a wide range of uses (personal use or professional use) and price20 positioning ofthe toothbrush, and the toothbrush head, ofthe present invention.Referring now to FIG. 2A, the toothbrush head 12 ofthe invention preferably comprises:1. a Buccal / Labial Element 14‘2. an Occlusal Element 17‘3. a Palatal / Lingual Element 16‘25 4. a Shaft / Handpiece interface Element 18‘The Buccal / Labial Element 14‘ comprises the treatment structure 14.The Palatal / Lingual Element 16‘ comprises the treatment structure 16.The Occlusal Element 17‘ comprises the middle treatment structure 17.30 The Shaft / Handpiece interface Element 18‘ comprises the shaft / handpiece interface 25 made byshaft 24.14 PWO-1026-002 51 015202530 15 PWO-1026-002 Referring again to FIG. 2A, the Occlusal Element 17‘ is designed with a sufficient widthso that the user‘s teeth can come into contact with its treatment structure 17 and apply a sufficientbrushing pressure against the top surface (occlusal) ofthe upper and lower teeth at the same timeat a location ofthe treatment / brushing along the dental arch. This element 17‘ might be built in5 one part (e.g. injected or 3D printcd) or as an assembly of multiple parts (structures, treatmentstructure, .Shaft / Handpiece interface Element 18‘ might be designed in such a way to avoid therelative rotation of the Buccal / Labial, Palatal / Lingual and Occlusal Elements around its axissubstantially perpendicular to the mesio-distal axis MD. For example, using a square, triangular,10 hexagonal, star or any polygonal shape for the shaft 24, or a cylindrical shape with at least one keyand slot, can insure the transmission ofthe movement to the treatment elements 14‘, 16‘, 17‘ by adental motor 66.Shaft / Handpiece interface Element 18‘ may be designed following ISO 1797 standard(Dentistry - Shanks for rotary and oscillating instrument) or be specific to this invention to ensure15 the correct usage of individualized brush shapes.The movable structure of Buccal / Labial 14‘ and Palatal / Lingual 16‘ Elements self-adaptto the morphology ofthe teeth (width) thanks to combination ofdesign and / or materials properties(flexibility / elasticity) and comes back to its original shape after use.These elements 14‘, 16‘, 17‘ might be built in one part (e.g. injected or 3D printed) or as an20 assembly of multiple parts (spring, structures, treatment structure, ...)The movable structure of Buccal / Labial 14‘ and Palatal / Lingual 16‘ Elements can bemounted on actuators (active element), or springs (passive element), for adapting the distancebetween the treatment structure 14, 16 along the axis X according to teeth width. The adaptationof the distance between the treatment structure 14, 16 along the axis X is preferably performed25 automatically, for example, through sensor(s) integrated in the toothbrush head 12. These sensorsare able to detect the pressure provided on the surfaces ofthe teeth and adjust the position ofthetreatment structure 14, 16, and eventually ofthe middle treatment structure 17.Advantageously, in some embodiments, only one between the Buccal / Labial Element 14‘and Palatal / Lingual Element 16‘ is movable along the axis X. Preferably the Palatal / Lingual30 Element 16‘ is movable along the axis X, while the Buccal / Labial Element 14‘ is maintained in afixed position along the shaft 24. The Palatal / Lingual Element 16‘ is the element intended to beinscrted into the mouth ofthe user. In some embodiments the Occlusal Element 17‘ is movablealong the axis X, preferably in association with the movement ofthe Palatal / Lingual Element 16‘,as shown in FIGs. 16A-D.16 PWO-1026-002 51015202530 direction. 17 PWO-1026-002 Optionally, the input ofa measurement ofthe relative dispiacement ofelements 14‘, 16‘,17‘ can trigger actuator behavior, such as actively adapting the pressure according to teeth width.According to the invention, the toothbrush 10 comprises a handpiece. Different types ofhandpieces can be used for the scope ofthe present invention:5 option 1: a manual handpiece made of a manual handle comprising at least one degree offreedom of rotation provided by a pivot, hinge 54, ball joint 56, including the interface with thetoothbrush head at one extremity (such as represented in FIGs. lOB and 11B);Option 2: an electro-mechanical handpiece made of a dental motor or the like comprisinga contra-angle at one extremity including the interface having at least one degree of freedom of10 rotation provided by as pivot, hinge, or ball joint, with the toothbrush head and an optional userinterface for brushing programs settings;Option 3: a sonic handpiece having a vibrator (preferably a sonic vibrator although amechanical vibrator may be used) or the like including the interface with at least one degree offreedom ofrotation provided by a pivot, hinge, balljoint connected to the toothbrush head and an15 optional user interface for brushing programs settings.A dental contra-angle is a handpiece used in dentistry to reach less accessible areas ofthemouth. The dental contra-angle has one or more bends, which provides the shaft of the rotaryinstrument with an angle. The contra-angle is used for intraoral as weh as extraoral procedures to20 remove decay, polish amalgam restorations, refine cavity preparation, adjust crowns & bridges,and adjust dentures. Bur (a part that drills into the teeth) vibrate less with contra-angle handpieces,hence are used for finer work.Optionally, the toothbrush head 12 is designed in way to be easily dismounted by the userfor cleaning and elements 14‘, 16‘, 17‘, 18‘ replacement / exchange purposes.25 Referring now to FIGs. 13-19, another embodiment ofthe toothbrush head, according tothe invention, is provided.The toothbrush head 120 is substantially similar to the toothbrush head 12. The majordifference is the shape of the two treatment structures facing each other: treatment structures 14and 160.30 In the present embodiment, treatment structure 160 is intended to be inserted into themouth of the user. Treatment structure 160 presents a smaller dimension than the oppositetreatment structure 14, so that the comfort ofthe user is improved.18PWO-I 026-00251015202530 the user. Advantageously one or more channels can be provided in reservoir 300 for improving the19 PWO-1026-002 5101520 Option 1 (manual use) user along mesio-distal axis MD and arou 25 movement ofthe Palatal / Lingual Element 16‘ as shown in FIG. 1) allows easy full mouth access30 17. 20 PWO-1026-002 Option 2 (eleetric rotating use)The toothbrush head is manualiy driven along the mesio-distal axis MD and extemallydriven by a dental motor 66 with continuous or alternating rotary movements around an axis X5 substantially perpendicular to mesio-distal axis MD. Optionally one degree offreedom ofrotation,for cxample via a pivot, hinge, ball joint, torque coil, is implemented between the handpiece andthe toothbrush head. The dental motor 66 usually comprises hand piece 50 and contra-angle (notshown as lt is welI-known in the art, but lt resembies in form the portion of the handpiece thatholds the toothbrush head in FIG. 8). Dental motors 66 are medical devices more robust than10 conventional electric toothbrushes and have contra-angles that are intended to work in oral cavityand withstand disinfection and sterilization processes. Using a formally validated “dental motor“is not necessary for using the present invention; a specific motor may also be used.Well-designed Handpiece Contra-angle and “revolution“ shape ofthe toothbrush head —Hyperboloid or Diabolo configuration - allow easy full mouth access from distal end to mesial15 front ofthe mandibular and maxillary dental arches at the same time.Option 3 (electric sonic use)The toothbrush is manually driven by user along mesio-distal axis MD and around an axisX substantially perpendicular to mesio-distal axis MD thanks to a link providing at least one degree20 of freedom of rotation, such as pivot, hinge, ball joint, ...‚ implemented on the electric / sonichandpiece. Link and “revolution“ — Diabolo / Hyperboloid design - ofthe toothbrush head allows easyfitil mouth access from distal end to mesial front ofthe mandibular and maxillary dental arches atthe same time.25 Further options, consumables and accessories - the invention optionally has...• toothbrush head elements 14, 16‘, 17‘, 18‘ that are customizable and exchangeable, for beingadapted to specific conditions or easily replaced (for example: color, size, shape, treatmentconstructs properties (hardness: soft, medium, ...; material, shape, size, ...)‘ brushing pressure30 level, .. .can be varied by an element to another)21PWO-I 026-002• customizable handpiece (materials, colors, surface treatment, ...)• some parts ofthe handpiece are exchangeable for use options 1, 2 ‚3 (requires compatibility ofthe interface)• for Option 2 and 3: adaptable / customizable brushing programs via the motor hand piece user5 interface (e.g. buttons and screen)• for Option 2: programmable continuous or reciprocating movement speed, torque limit andreciprocating angles (CWE->CCW), memorized in motor hand piece.• for Option 2: torque limit detection triggers motor behavior by, for example slowing down, stopor change movement direction.1 0 In this case, a “safety function“ can detect:• 1) ifteeth are clamped too tightly• 2) iftoo much pressure is applied to one side ofthe teethOtherwise, or in addition, a “functional use“ can be provided for squeezing once and / or changingdirection, e.g. releasing toothpaste, or making a special movement (acceleration, alternation, etc.)15 at a point where you feel you want to insist on brushing, triggering a program adapted to theincisors, etc.• for Option 2: relative displacement 34 or distance or distance measurement between the elements14‘, 16‘, 17‘ triggers motor behavior by for example siowing down, stopping or changingmovement direction, or triggers actuator behavior, such as actively adapting the pressure according20 to teeth width. Can be an impedance measurement between components, or any other solution tomeasure distance or force.• for Option 3: programmable sonic vibration amplitude and frequency• for Option 2 and 3: wireless link of hand piece to an app for the logging oftreatment data andprotocol management.25 • for Option 2 and 3: hand piece battery with wireless charging.• device for the cleaning and disinfcction ofthe toothbrush elements 14‘, 16‘. 17‘, 18‘ in contactwith the body ofthe user.• for Option 2: liquid toothpaste supply via the motor contra-angle.30 MaterialsSome parts ofthe toothbrush are intended for use in oral cavity environment.22 PWO-1026-002 51015202530 disinfection solutions and steam sterilization process.23 PWO-1026-002 5 10 3. The toothbrush (10) of any one of feature sets 1 or 2, the toothbrush further having elastic15 structures (20, 22) so that at least one treatment structure (14, 16, 17) is displaceablc, along an axis(X) substantially perpendicular to the mesio-distal axis (MD), by the elastic structures (20,22) soas to apply adaptive or substantially constant treatment pressure on teeth surfaces.202530 24PWO-I 026-002and wherein the treatment constructs (36) ofthe two opposing treatment structures (14, 16) are atleast partially opposcd to each other.8. The toothbrush (10) ofany one ofthe above feature sets, wherein the treatment structures (14.5 16, 17) include treatment constructs (36) made ofnylon, silicone, thermoplastic elastomers (TPE),thermoplastic polyurethane (TPU), natural fibers, polymers, gel, or any combination thereof,preferably in the shapc of spikes.9. The toothbrush (10) ofany one ofthe above feature sets, wherein the treatment structures (14,10 16, 17) have treatment constructs (36) in the shape of tufts, bristles, lamella, spikes, waves,paddles, fins, or any combination of such shapes.10. The toothbrush (10) of any one of the above feature sets, wherein the treatment structurcs(14, 16, 17) are structures adapted to perform one ofthe group offunctions consisting ofbrushing,15 polishing, whitening, fluoridating, and deodorizing.11. The toothbrush (10) of any one of the above feature sets 1-9, wherein at least one treatmentstructure (14, 16, 17) is a brushing structure.20 12. The toothbrush (10) ofany one ofthe above feature sets 1-9, wherein at least one treatmentstructure (14, 16, 17) is a polishing structure.13. The toothbrush (10) ofany one ofthe above feature sets 1-9, wherein at least one treatmentstructure (14, 16, 17) is a whitening structure.25 14. The toothbrush (10) ofany one ofthe above feature sets 1-9, wherein at least one treatmentstructure (14, 16, 17) is a deodorizing structure.15. The toothbrush (10) of any one of the above feature sets 1-9, wherein at least one treatment30 structure (14, 16, 17) is an applicator structure.16. The toothbrush (10) ofany one ofthe above feature sets, wherein the elastic structures (20, 22)allow a predetermined displacement (34) of at least one of the treatment structures (14, 16, 17)along an axis (X) substantially perpendicular to the mesio-distal axis (MD).25PWO-I 026-00217. Thc toothbrush (10) of any one of the above feature sets, wherein one or both between thetreatment structures (14,16,17) and the treatment constructs (36) arc elastic or flexible so that theycan dispiace along an axis (X) substantially perpendicular to the mesio-distal axis (MD).5 18. The toothbrush (10) ofany one ofthe above feature sets, whcrein a treatment structure (17) isdisposed between adjaccnt treatment structures (14, 16) and around an axis (X) substantiallyperpendicular to the mesio-distal axis (MD).10 19. The toothbrush (10) ofany one ofthe above feature sets, wherein the treatment structures (14,16, 17) arc in the shape ofa Buccal / Labial element (14‘), a Palatal / Lingual element (16‘) and anOcclusal Element (17‘) and wherein the toothbrush head (12) is designed in such a way that thetreatment constructs (36) ofthe Buccal / Labial element (14‘) and Palatal / Lingual element (16‘)arc partially in contact with treatment constructs (36) of the Occlusal Element (17‘) along a15 dispiaceable span (34) between the BuccalfLabial Element (14‘) and the Palatal / Lingual Element(16‘). 20. The toothbrush (10) ofany one ofthe above feature sets, whcrein the treatment constructs (36)ofeach treatment structure (14, 16, 17) arc disposed on the treatment structures (14, 16, 17) in an20 angular position (0) to avoid or minimize contact among them during use.21. The toothbrush (10) ofthe previous feature sets, wherein the toothbrush further comprises ashaft / handpiece interface element (18‘) for maintaining the treatment structures (14, 16, 17) inplace and wherein the angular position (0) oftreatment constructs (36) ofthe treatment structures25 (14, 16, 17) is set by a cross-sectional shape (47) ofthe shaft / handpiece interface element (18‘).22. The toothbrush (10) ofany one ofthe above feature sets, wherein the handpiece (50) includeselements ofthe head (12) and its handpiece interface (52, 54, 56).30 23. The toothbrush (10) of any one of the above feature sets, including a electro-mechanicalhandpiece including a vibrator (67) including an interface (68) with at least one degrec offreedomof rotation, such as pivot, hinge, ball joint, or torque coil, connecting the handpiece with thetoothbrush head (12) and, optionally, auser interface (69) enabling selection oftreatmentprogramsby the user.26 PWO-l026-002 24. The toothbrush (10) offeature sets 23, wherein the electro-mechanical handpiece has a sonicvibration. 525. The toothbrush (10) ofany one ofthe above feature sets, whcrein the toothbrush (10) uses adental motor (66) optionally with an ISO 1797 interface.26. The toothbrush (10) of any one of the above feature sets, wherein the dental motor (66) isprogrammable and / or linked to a dedicated app.10 27. The toothbrush (10) ofany one ofthe above feature sets, wherein the rotating motion (32) ofthe toothbrush head (12) is programmable from continuous to alternating rotation, and in whichspeed, torque limit, and movement angles are also programmable.15 28. The toothbrush (10) of any one of the above feature sets, further including a torque detector(74) wherein the torque detector triggers motor behavior for safety or comfort purposes, preferablyby limiting the pressure on the gum (76).29. The toothbrush (10) of any one of the above feature sets, wherein a measure of the relative20 displacement (34) ofone or more treatment structures (14, 16, 17) triggers the motor behavior ofthe toothbrush, such as siowing down, stopping, or changing movement direction.30. The toothbrush (10) ofany one ofthe above feature sets, further comprising a user interface(69) enabling selection oftreatment programs by the user.25 31. The toothbrush (10) of any one of the above feature sets, wherein the form or size of elements(14, 16, 17, 24, 14‘, 16‘, 17‘, 18‘) ofthe toothbrush head (12) are interchangeable forbeing adaptedto different users.30 32. The toothbrush (10) of any one of the above feature sets, wherein the handpiece (50) at oneextremity including the interface (25) with the toothbrush head (12) has at least one degree offreedom provided by a pivot, hinge, ball joint, or torque coil.27 PWO-1026-002 33. The toothbrush (10) of any one of the above feature sets, wherein the handpiece (50) is anelectro-mechanical handpiece comprising a dental motor (66), having a contra-angle at oneextremity of the toothbrush.5 34. The toothbrush (10) ofany one ofthe above feature sets, wherein a rotation ofthe treatmentstructures (14, 16, 17) around an axis (X) substantially perpendicular to the mesio-distal axis (MD)is provided by rotation means selected from one of the group of rotation means consisting of amanual handpiece, a mechanical handpiece, an electrical handpiece and a sonic handpiece.10 35. The toothbrush (10) ofany one ofthe abovc fcature sets, wherein the size ofthe head (12) isadjustablc for being adapted to the size ofthe user‘s mouth.36. The toothbrush (10) of any one of the above feature sets, wherein a measure of the relativedispiacement (34) of trcatment structures (14, 16, 17) triggers actuator behavior, such as actively15 adapting the pressure according to teeth width, wherein the teeth width is different betweenincisors and molars.37. The toothbrush (10) of any one of the above feature sets, wherein a measure of the forcebetween treatment structures (14, 16, 17) triggers actuator behavior, such as actively adapting the20 pressure according to teeth width, wherein the teeth width is defined as the dimension ofthe toothin the mesio-distal plan along the labial-buccal direction.38. The toothbrush (10) ofany one ofthe above feature sets, wherein at least one ofthc treatmentstructures (14, 16, 17) include a reservoir or tank (300) and one or more channels (302), wherein25 the one or more channels (302) are in fluid communication with the reservoir / tank (300) and themouth ofthe user for enabling the releasing ofa fluid or gel, such as toothpaste.39. The toothbrush (10) of feature sets 38, wherein the release of fluid or gel is activated by thecontinuous or alternating rotating movement of at least one of the toothbrush head‘s treatment30 structures (14, 16, 17).40. The toothbrush (10) offeature sets 38, wherein the release of fluid orgel is activated by anelastic deformation ofat least one ofthe treatment structures (14, 16, 17).28 PWO-1026-002 41. The toothbrush (10) ofany one ofthe above feature sets, comprising:- a handpiece (50),- a motor (66) for moving the toothbrush head (12) and- a control unit configured to detect the actual torque or motor current provided by the motor (66)5 to the toothbrush head (12) and to adjust torquc or motor current 011 a predetermined valuc.42. The toothbrush (10) ofthe previous feature sets, wherein the predetermined valuc is based onthe position ofthe toothbrush, the toothbrush head and / or the position oftreatment structures(14, 16, 17).10 43. A toothbrush head (12, 120) comprising:- a shaft (24) presenting a longitudinal axis (X);- two treatment structures (14, 16, 160), wherein cach of the treatment structures (14,16, 160)presents a surface comprising a plurality of treatment constructs (36), preferably treatment15 constructs are bristles (36), the two treatment structures (14,16, 160) being arranged 011 the shaft(24) so that the surface of the treatment structures (14,16, 160) presenting treatment constructs(36) faces cach other;- at least one middle treatment structure (17) comprising a plurality of treatment constructs (36),being arranged around the longitudinal axis (X) of the shaft (24) between the two treatments20 structure (14,16, 160) in such a way that the plurality of treatments constructs (36) of the twotreatments structure (14,16, 160) and of the middle treatment structure (17) are not in contactamong them.44. The toothbrush head (12) according to the previous feature sets wherein the two treatment25 structures (14,16) have the same shape.45. The toothbrush head (120) according to anyone of feature sets 43 - 44 wherein the twotreatment structures (14,160) have different shapes.30 46. The toothbrush head according to anyone offeature sets 43 - 45 wherein at least one ofthe twotreatment structures (14, 160) presents, at least partially, a bulb, a globular or ellipsoid shape, tomaximize the surface ofthe treatment structure (160) covered by treatments constructs (36).29 PWO-1026-002 47. The toothbrush head according to anyone offeature sets 43 - 46 wherein at least one ofthe twotreatment structures (160) has a maximum width (d2) smallerthan the maximum width (dl) oftheopposite treatment structure (14), the maximum width (dl, d2) being defined as the distancebetween two opposite points of the surface of the treatment structure (14, 160) covered with5 treatment constructs (36) along a palatal-lingual plane.48. The toothbrush head according to the previous feature sets wherein the treatment structure(14,160) having a smaller width (d2) in a palatal-lingual plane is the treatment structure (160)intended to be inserted inside the mouth ofthe user.10 49. The toothbrush head according to anyone of feature sets 43 - 48 wherein at least one of thetreatment structures (14, 16, 160) presents an elastic, or electrically actuated, element or apneumatic element (200) insisting on the at least one ofthe treatment structures (14, 16, 160) fordisplacing it along the longitudinal axis (X).15 50. The toothbrush head according to the previous feature sets wherein the at least one of thetreatment structures (14, 16, 140) presenting an elastic, or electrically actuated, element or a orpneumatic element (200) is the treatment structure (160) intended to be inserted inside the mouthof the user.20 51. The toothbrush head according to anyone of feature sets 43 - 50 wherein at least one of thetreatment structures (14, 16, 160) presents a reservoir (300).52. The toothbrush head according to the previous feature sets, wherein the reservoir (300) is25 configured to collapse when at least one ofthe treatment structures (14, 16, 160) is displaced alongthe longitudinal axis (X).53. The toothbrush head according to the previous feature sets, wherein the reservoir (300) isconfigured to collapse when the treatment structure (160) presenting the reservoir (300) is30 displaced along the longitudinal axis (X).54. The toothbrush head according to anyone of feature sets 51 - 53 wherein the reservoir (300)presents at least one inlet (301) for inserting a fluid, such as toothpaste.30PWO-I 026-00255. The toothbrush head according to anyone of feature sets 51 - 54, wherein the reservoir (300)presents at least one outlet (302) for releasing a fluid, such as toothpaste, when at least one ofthetreatment structures (14, 16, 160) is displaced along the longitudinal axis (X).5 56. The toothbrush head according to the previous feature sets, wherein the reservoir (300) presentsat least one outlet (302) for releasing a fluid, such as toothpaste, when the treatment structure (160)presenting the reservoir (300) is displaced along the longitudinal axis (X).57. The toothbrush head according to anyone offeature sets 43 - 56, wherein the toothbrush head10 further comprising:- at least one linear actuator (20, 22, 200)- a motor (66) for moving the toothbrush head (12) and- a control unit configured to detect the actual force or position provided by the motor (66) to thetoothbrush head (12) and to adjust the force or position ofthe treatment structures (14, 16, 160)15 to a predetermined value.58. The toothbrush head ofthe previous feature sets, wherein the predetermined value is based onthe position ofthe toothbrush head and / or the position oftreatment structures (14, 16, 17).20 59. A toothbrush comprising a toothbrush head according to any one ofthe preceding feature sets43-58. In an advantage, the invention combines the advantages oftriple brush and double sided,or side-to-side toothbrush on pivot and rotary electro mechanically driven toothbrushes.25 In another advantage, the invention allows for brushing simultaneously oppositemaxillary and mandibular teeth.In another advantage, the invention improves the efficiency ofthe brushing, guaranteeingall the surfaces of the teeth, the gum-teeth interface and interdental spaces are cleaned, optionallygum is massaged, with pressure control.30 In another advantage, because the position of the brushes on the head will always be incontact with a specific area of the teeth, they can be adapted (material, shape, hardness, bristlesdensity, etc.) to specific topology and function (which is not the case with current toothbrushes,improving the efficiency ofthe brushing and reducing the risks ofbad brushing.31 PWO-1026-002 In anothcr advantage, the invention reduces brushing time compared to commontoothbrushes (manual and clectric).In another advantage, the invention allows for covering all size of teeth up to gingiva / 5 In another advantage, the invention adapts its shape to brush any type of tooth on the 3faces (buccal / labial, lingual / palatal and occlusal) of 2 ranges of teeth at the same time, withsubstantially constant force, thanks to movable elastic structures (by virtue of preferred designand, optionally, materials).In another advantage, the toothbrush head of the invention is compatible with options 1,10 2, 3 of use for improving the brushing experidnce.In another advantage, the toothbrush head ofthe invention‘s elements are exchangeableand “customizable“ (e.g. color, size, treatment constructs hardness, pressure level, etc). lt istherefore possible to adapt toothbrush head elements shape and size for different users (c.g.children, seniors, etc).15 In another advantage, the invention, in option 2 of use, offers smart behavior to enhancethe cleaning of the teeth or to protect from over pressure thanks to measurement of torque and / orrelative dispiacement between the elements.In another advantage, the invention withstands disinfection solutions. Advantageouslythe toothbrush head ofthe invention is steam sterilizable.20 lt should be appreciated that the particular implementations shown and herein describedarc representative ofthe invention and its best mode and are not intended to limit the scope ofthepresent invention in any way.lt should be appreciated that many applications of the present invention may beformulated. One skilled in the art will appreciate that any app may connect to a network which25 may includc any system for exchanging data, such as, for example, the Internet, an intranet, anextranet, WAN, LAN, wireless network, satellite communications, and / or the like. lt is noted thatthe network may be implemented as other types of networks, such as an interactive televisionnetwork. The users may interact with the system via any input device such as a keyboard, mouse,kiosk, personal digital assistant, handheld computer, cellular phone and / or the like. Moreover, the30 system contemplates the usc, sale and / or distribution ofany goods, services or information havingsimilar functionality described herein.The computing units mentioned herein may be connected with each other via a datacommunication network. The network may be a public network and assumed to be insecure andopen to eavesdroppers or may also be secure. In one exemplary implementation, the network may32 PWO-1026-002 51015202530 33 PWO-1026-002 As used herein, the terms “comprises“, “comprising“, or variations thereof, are intendedto refer to a non-exclusive listing ofelements, such that any apparatus, process, method, article, orcomposition of the invention that comprises a list of elements, that does not include only thoseelements recited, but may also include other elements such as those described in the instant5 specification. Unless otherwise explicitly stated, the use of the term “consisting“ or “consistingof‘ or “consisting essentially of“ is not intended to limit the scope of the invention to theenumerated elements named thereafter, unless otherwise indicated. Other combinations and / ormodifications ofthe above-described elements, materials or structures used in the practice ofthepresent invention may be varied or adapted by the skilled artisan to other designs without departing10 from the general principles ofthe invention.The patents and articies mentioned above are hereby incorporated by reference herein,unless otherwise noted, to the extent that the same are not inconsistent with this disclosure.Other characteristics and modes of execution of the invention are described in theappended claims.15 Further, the invention should be considered as comprising all possible combinations ofevery feature described in the instant specification, appended claims, and / or drawing figures whichmay be considered new, inventive and industrially applicable.Additional features and functionality of the invention are described in the claimsappended hereto and / or in the abstract. Such claims and / or abstract are hereby incorporated in20 their entirety by reference thereto in this specification and should be considered as part of theapplication as filed.Multiple variations and modifications are possible in the embodiments ofthe inventiondescribed here. Although certain illustrative embodiments of the invention have been shown anddescribed here, a wide range of changes, modifications, and substitutions is contemplated in the25 foregoing disclosure. While the above description contains many specific details, these should notbe construed as limitations on the scope of the invention, but rather exemplify one or anotherpreferred embodiment thereof. In some instances, some features ofthe present invention may beemployed without a corresponding use of the other features. Accordingly, it is appropriate thatthe foregoing description be construed broadly and understood as being illustrative only, the spirit30 and scope of the invention being limited only by the claims which ultimately issue in thisapplication. In accordance with the provisions of the patent statutes, the present invention has beendescribed in what is considered to represent its preferred embodiment. However, it should be notedthat the invention can be practiced otherwise than as specifically illustrated and described without34

Claims

PWO-1026-002 CLAIMS 5 What is claimed is:

1. A toothbrush (10) comprising a toothbrush head (12) including three treatment structures (14,16, 17) adapted to simultaneously treat opposite maxillary and mandibular teeth, wherein two of1 0 the treatment structures (14, 16) are substantially opposed to each other along the same plane andthe third treatment structurc (17) is placed between the previous two opposing treatment structures(14, 16).

2. The toothbrush of claim 1, whcrcin at least two adjacent treatment structures (14, 16, 17) are15 fixed together so as to move together.

3. The toothbrush (10) ofany one ofclaims 1 or 2, the toothbrush further having elastic structures(20, 22) so that at least one trcatment structure (14, 16, 17) is displaceable, along an axis (X)substantially perpendicular to the mesio-distal axis (MD), by the elastic structures (20,22) so as to20 apply adaptive or substantially constant treatment pressure on teeth surfaces.

4. The toothbrush (10) ofany one ofthe above claims, wherein at least one treatment structure (14,16, 17) is displaceable, along an axis (X) substantially perpendicular to the mesio-distal axis (MD),by the teeth surfaces (30) when in use so as to apply adaptivc or substantially constant treatment25 pressure on the tceth surfaces by means of lateral and rotative movements thereof.

5. The toothbrush (10) ofany one ofthe above claims, whcrein the treatment structures (14, 16,17) arc fixed in a set angular position () on a shaft (24) disposed along an axis (X) substantiallypcrpendicular to the mesio-distal axis (MD).30 6. The toothbrush (10) ofany onc ofthc abovc claims, whercin thc trcatment structurcs (14, 16,17) arc free to rotate around an axis (X) substantially perpendicular to thc mesio-distal axis (MD).36PWO-1026-002 7. The toothbrush (10) ofany one ofthc above claims, wherein the treatment structures (14, 16,17) are brush structures having treatment constructs (36) which are preferab!y bristles (36), andwherein the treatment constructs (36) ofthe two opposing treatment structurcs (14, 16) arc at leastpartially opposed to cach other.5 8. The toothbrush (10) ofany one ofthe above claims, wherein the treatment structurcs (14. 16,17) include treatment constructs (36) made of nylon, silicone, thermoplastic elastomers (TPE),thermoplastic polyurethane (TPU), natura! fibers, polymers, ge!, or any combination thereof,preferably in the shape of spikes.10 9. The toothbrush (10) of any one ofthe above claims, wherein the treatment structures (14, 16,17) have treatment constructs (36) in the shape oftufts, bristles, lamella, spikes, waves, paddies,fins, or any combination of such shapes.15 10. The toothbrush (10) ofany one ofthe above claims, wherein the treatment structures (14, 16,17) arc structures adapted to perform one of the group of functions consisting of brushing,polishing, whitening, fluoridating, and deodorizing.

11. The toothbrush (10) ofany one ofthe above claims 1-9, wherein at least one treatment structure20 (14, 16, 17) is a brushing structure.

12. The toothbrush (10) ofany one ofthe above claims 1-9, wherein at least one treatment structure(14, 16, 17) is a polishing structure.25 13. The toothbrush (10) ofany one ofthe above claims 1-9, wherein at least one treatment structure(14, 16, 17) is a whitening structure.

14. The toothbrush (10) ofany one ofthe above claims 1-9, wherein at least one treatment structure(14, 16, 17) is a deodorizing structure.30 15. The toothbrush (10) ofany one ofthe above claims 1-9, wherein at least one treatment structure(14, 16, 17) is an applicator structure.37PWO-1026-002 16. The toothbrush (10) of any one of the above claims, wherein the elastic structures (20, 22)allow a predetermined dispiacement (34) of at least one of the treatment structures (14, 16, 1 7)along an axis (X) substantially perpendicular to the mesio-distal axis (MD).5 17. The toothbrush (10) ofany one ofthe above claims, wherein one or both between the treatmentstructures (14,16,17) and the treatment constructs (36) are elastic or flexible so that they candispiace along an axis (X) substantially perpendicular to the mesio-distal axis (MD).

18. The toothbrush (10) of any one of the above claims, wherein a treatment structure (17) is10 disposed between adjaccnt treatment structures (14, 16) and around an axis (X) substantiallyperpendicular to the mesio-distal axis (MD).

19. The toothbrush (10) ofany one ofthe above claims, wherein the treatment structures (14, 16,17) are in the shape of a Buccal / Labial element (14‘), a Palatal / Lingual element (16‘) and an15 Occlusal Element (17‘) and wherein the toothbrush head (12) is designed in such a way that thetreatment constructs (36) of the Buccal / Labial element (14‘) and Palatal / Lingual element (16‘)are partially in contact with treatment constructs (36) of the Occlusal Element (17‘) along adispiaceable span (34) between the Buccal / Labial Element (14‘) and the Palatal / Lingual Element(16‘). 20 20. The toothbrush (10) ofany one ofthe above claims, wherein the treatment constructs (36) ofeach treatment structure (14, 16, 17) are disposed on the treatment structures (14, 16, 17) in anangular position () to avoid or minimize contact among them during use.25 21. The toothbrush (10) of the previous claim, wherein the toothbrush further comprises ashaft / handpiece interface element (18‘) for maintaining the treatment structures (14, 16, 17) inplace and wherein the angular position (0) oftreatment constructs (36) ofthe treatment structures(14, 16, 17) is set by a cross-sectional shape (47) ofthe shaft / handpiece interface element (18‘).30 22. The toothbrush (10) of any one of the above claims, wherein the handpiece (50) includeselements ofthe head (12) and its handpiece interface (52, 54, 56).

23. The toothbrush (10) ofany one ofthe above claims, including an electro-mechanical handpieceincluding a vibrator (67) including an interface (68) with at least one degree offreedom ofrotation,38PWO-1026-002 such as pivot, hinge, balljoint, or torque coil, connecting the handpiece with the toothbrush head(12) and, optionally, a user interface (69) enabling selection oftreatment programs by the user.

24. The toothbrush (10) of claim 23, wherein the electro-mechanical handpiece has a sonic5 vibration.

25. The toothbrush (10) ofany one ofthe above claims, wherein the toothbrush (10) uses a dentalmotor (66) optionally with an ISO 1797 interface.10 26. The toothbrush (10) of any one of the above claims, wherein the dental motor (66) isprogrammable and / or linked to a dedicated app.

27. The toothbrush (10) of any one ofthe above claims, wherein the rotating motion (32) ofthetoothbrush head (12) is programmable from continuous to alternating rotation, and in which speed,15 torque limit, and movement angles are also programmable.

28. The toothbrush (10) ofany one ofthe above claims, further including a torque detector (74)wherein the torque detector triggers motor behavior for safety or comfort purposes, preferably bylimiting the pressure on the gum (76).20 29. The toothbrush (10) of any one of the above claims, wherein a measure of the relativedispiacement (34) ofone or more treatment structures (14, 16, 17) triggers the motor behavior ofthe toothbrush, such as slowing down, stopping, or changing movement direction.25 30. The toothbrush (10) ofany one ofthe above claims, further comprising a user interface (69)enabling selection oftreatment programs by the user.

31. The toothbrush (10) of any one of the above claims, wherein the form or size of elements (14,16, 17, 24, 14‘, 16‘, 17‘, 18‘) ofthe toothbrush head (12) are interchangeable for being adapted to30 different users.

32. The toothbrush (10) of any one of the above claims, wherein the handpiece (50) at oneextremity including the interface (25) with the toothbrush head (12) has at least one degree offreedom provided by a pivot, hinge, ball joint, or torque coil.39PWO-1026-002 33. The toothbrush (10) ofany one ofthe above claims, wherein the handpiece (50) is an electromechanical handpiece comprising a dental motor (66), having a contra-angle at one extremity ofthe toothbrush.5 34. The toothbrush (10) of any one of the above claims, wherein a rotation of the treatmentstructures (14, 16, 17) around an axis (X) substantially pcrpendicularto the mesio-distal axis (MD)is providcd by rotation means selected from one of the group of rotation means consisting of amanual handpiece, a mechanical handpiece, an electrical handpiece and a sonic handpiece.10 35. The toothbrush (10) of any one of the above claims, whcrein thc size of the head (12) isadjustable for being adapted to the size ofthe user‘s mouth.

36. The toothbrush (10) of any one of the above claims, wherein a measure of the relative15 dispiacement (34) oftreatment structures (14, 16, 17) triggers actuator behavior, such as activelyadapting the pressure according to teeth width, wherein the teeth width is different betweenincisors and molars.

37. The toothbrush (10) ofany one ofthe above claims, wherein a measure ofthe force between20 treatment structures (14, 16, 17) triggers actuator behavior, such as actively adapting the pressureaccording to teeth width, wherein the teeth width is defined as the dimension of the tooth in themesio-distal plan along the labial-buccal direction.

38. The toothbrush (10) of any one of the above claims, wherein at least one of the treatment25 structures (14, 16, 17) include a reservoir or tank (300) and one or more channels (302), whereinthe one or more channels (302) are in fluid communication with the reservoir / tank (300) and themouth ofthe user for enabling the releasing ofa fluid orgel, such as toothpaste.

39. The toothbrush (10) of claim 38, wherein the release of fluid or gel is activated by the30 continuous or alternating rotating movement of at least one of the toothbrush head‘s treatmentstructures (14, 16, 17).

40. The toothbrush (10) ofclaim 38, wherein the release of fluid orgel is activated by an elasticdeformation ofat least one ofthe treatment structures (14, 16, 17).40PWO-1026-002 510<img src='' class="img-anchor img-center" img-id="IMGF000043_0001" / >43. A toothbrush head (12, 120) comprising:- a shaft (24) presenting a longitudinal axis (X);- two treatment structures (14, 16, 160), wherein each of the treatment structurcs (14,16, 160)1 5 presents a surface comprising a plurality of treatment constructs (36), preferably treatmentconstructs are bristles (36), the two treatment structures (14,16, 160) being arrangcd on the shaft(24) SO that the surface of the treatment structures (14,16, 160) presenting treatment constructs(36) faces each other;- at least one middle treatment structure (17) comprising a plurality oftreatment constructs (36),20 being arranged around the longitudinal axis (X) of the shaft (24) between the two treatmentsstructurc (14,16, 160) in such a way that the plurality of treatments constructs (36) of the twotrcatments structure (14,16, 160) and of the middle treatment structure (17) are not in contactamong them.25 44. The toothbrush head (12) according to the previous claim wherein the two treatment structures(14,16) have the same shape.3041PWO-I 026-00247. The toothbrush head according to anyone of claims 43 - 46 wherein at least one of the twotreatment structures (160) has a maximum width (d2) smallerthan the maximum width (dl) oftheopposite treatment structure (14), the maximum width (dl, d2) being defined as the distancebetween two opposite points of the surface of the treatment structure (14, 160) covered with5 treatment constructs (36) along a palatal-lingual plane.

48. The toothbrush head according to the previous claim wherein the treatment structure (14,160)having a smaller width (d2) in a palatal-lingual plane is the treatment structure (160) intended tobe inserted inside the mouth ofthe user.10 49. The toothbrush head according to anyone ofclaims 43 -48 wherein at least one ofthe treatmentstructures (14, 16, 160) presents an elastic, orelectrically actuated, element orapneumatic element(200) insisting on the at least one ofthe treatment structures (14, 16, 160) for dispiacing it alongthe longitudinal axis (X).15 50. The toothbrush head according to the previous claim wherein the at least one ofthe treatmentstructures (14, 16, 140) presenting an elastic, or electrically actuated, element or a or pneumaticelement (200) is the treatment structure (160) intended to be inserted inside the mouth ofthe user.20 51. The toothbrush head according to anyone ofclaims 43 - 50 wherein at least one ofthe treatmentstructures (14, 16, 160) presents a reservoir (300).

52. The toothbrush head according to the previous claim, wherein the reservoir (300) is configuredto collapse when at least one of the treatment structures (14, 16, 160) is displaced along the25 longitudinal axis (X).

53. The toothbrush head according to the previous claim, wherein the reservoir (300) is configuredto collapse when the treatment structure (160) presenting the reservoir (300) is displaced along thelongitudinal axis (X).30 54. The toothbrush head according to anyone ofclaims 51 - 53 wherein the reservoir (300) presentsat least one inlet (301) for inserting a fluid, such as toothpaste.42PWO-I 026-00255. The toothbrush head according to anyone of claims 51 - 54, wherein the reservoir (300)presents at least one outlet (302) for releasing a fluid, such as toothpaste, when at least one ofthetreatment structures (14, 16, 160) is displaced along the longitudinal axis (X).5 56. The toothbrush head according to the previous claim, wherein the reservoir (300) presents atleast one outlet (302) for releasing a fluid, such as toothpaste, when the treatment structure (160)presenting the reservoir (300) is displaced along the longitudinal axis (X).

57. The toothbrush head according to anyone ofclaims 43 - 56, wherein the toothbrush head further10 comprising:- at least one linear actuator (20, 22, 200)- a motor (66) for moving the toothbrush head (12) and- a control unit configured to detect the actual force or position provided by the motor (66) to thetoothbrush head (12) and to adjust the force or position ofthe treatment structures (14, 16, 160)15 to a predetermined value.

58. The toothbrush head ofthe previous claim, wherein the predetermined value is bascd on theposition ofthe toothbrush head and / or the position oftreatment structures (14, 16, 17).20 59. A toothbrush comprising a toothbrush head according to any one ofthe preceding claims 43-43

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