MX2008003672A - Toothbrush head - Google Patents

Abstract

The invention relates to a toothbrush head with a bristle support, on which a bristle field with a number of bristle bunches is arranged, the bristle bunches being of three different inclined groups of bristle bunches, of which a first group is arranged essentially perpendicular to the bristle support plane, a second group is laterally inclined to a first side perpendicular to the toothbrush head longitudinal axis and a third group is inclined laterally to an opposing second side, the bristle bunches of the second and third group being arranged on the bristle support in perpendicular rows. The toothbrush head is characterised in that in each perpendicular row of inclined bristle bunches all bristle bunches are inclined to the same side and the bristle bunches are all inclined from the outside towards the inside.

Description

HEAD OF DENTAL BRUSH This invention relates to a toothbrush head with a bristle support member on which is placed a bristle area comprising a plurality of bundles of bristles, the bristle zone comprising three groups with different inclination of bundles of bristles of which, a first group is placed essentially perpendicular to the plane of the bristle support member, a second group is inclined in a direction transverse to the longitudinal axis of the toothbrush head towards a first side and, a third group is inclined in a direction transverse to the longitudinal axis of the head of the toothbrush towards a second opposite side, with the bundles of inclined bristles of the second and third group which are placed in rows transverse to the bristle support member. The manual toothbrushes have, in their simplest version, bundles of bristles that are oriented on the bristle support member to be perpendicular to the plane defined by said support member. There are many different modifications of this provision in existence. These include brush heads with bundles of various lengths d, cf. U.S. Patent No. 6,276,021 or U.S. Patent No. 5,305,489, bristle brush heads with bristles of various lengths, cf WO 98/07348, brush heads with slanting bristle bundles direction of the longitudinal axis of the toothbrush, cf United States Patent No. 6,272,714 and toothbrush heads with bundles of bristles that are inclined in a direction transverse to the longitudinal axis of the toothbrush. The last arrangement, described in U.S. Patent No. 5,335,389, has a plurality of bundles of bristles placed in transverse rows one behind the other in the bristle support member. In this arrangement, the transverse rows with bundles of non-inclined bristles alternate with transverse rows having bundles of slant bristles. As such, the outermost bundles of bristles in a transverse row are tilted outward so that they are deployed in a V-shape. The externally inclined outward bristle bundles are intended to simultaneously clean the gingival space in the gingival margin of the upper jaw and in the gingival margin of the lower jaw. A similar arrangement of bristle areas with bundles of bristles tilted outwardly at the outer edge of the bristle area is described in U.S. Patent No. 5,628,082, U.S. Patent No. 3,722,020, U.S. Pat. of the United States of America No. 4,010,509 or WO 2004/037038 A1. The last of these documents describes, in addition to the transversal rows of bristle bundles with outwardly inclined bristle bundles, a transverse row with two bundles of bristles inclined inwards. With the help of these bundles of anti-inclined bristles it will be possible in particular to achieve an improved cleaning of the concave bite surface of the molars. However, said bundles of tilted bristles are less suitable for cleaning in the proximal area and in the gingival area of the teeth. The ends of the anti-inclined bristle bundles are no longer available to move freely at their predetermined inclination and are obstructed by the other bundles of bristles with the opposite inclination.

A region of bristles with inwardly inclined bristle bundles is also described in WO 01/89344 A2, in which the bundles of bristles are inclined not only in a direction transverse to the longitudinal axis of the toothbrush, but also in the direction of the axis longitudinal of the toothbrush. With this configuration, the bundles of bristles of a transverse row are inclined in different transverse and longitudinal directions so that the bundles of bristles partially overlap when they are closed both in the longitudinal direction of the toothbrush and in the transverse direction of the brush. dental. Here also the result is an obstruction of the bundles of bristles bent by the bundles of bristles with a different inclination. With this toothbrush, the cleaning of the flat portions of the teeth is susceptible to further improvement. In addition, CH 324623 describes a toothbrush with transverse rows of bundles of bristles each inclined in one direction. This toothbrush begins to be made without beams of perpendicular bristles in order not to rectify grooves in the tooth enamel and in order to avoid wedge-shaped defects in the long term. With this prior known bristle configuration it is possible to achieve a satisfactory cleaning of the nearby spaces, although the cleaning of the flat areas of the teeth is scarce. It is therefore an object of the present invention to provide a toothbrush head of the type initially referred to which avoids the disadvantages of the prior art in that it is developed in an advantageous manner. In particular, the object is to provide a toothbrush head which cleans the interproximal, gingival and flat areas of the teeth equally effectively without any special tilting of the toothbrush head. This object is achieved according to the invention by means of a brush head of customers according to claim 1. Preferred embodiments of the invention are the subject matter of the independent claims. In accordance with the present invention, the three provided groups of bristle bundles are positioned and inclined in a special manner. The bundles of bristles of the second and third group, which are additionally provided to the bundles of bristles placed perpendicularly, so that in each transverse row of bundles of slant bristle all the bundles of bristles of a transverse row are inclined towards the Same side. The term "outwardly inside" as used herein represents an arrangement in which, when a transverse row is considered in its entirety, the bristle bundle base that is located in the bristle support member is closer to the outer edge of the bristle area that the bristle head, when a whole cross row is considered, is located closer in the center of the bristle area. If a bundle of bristles is located with its beam base on the left side of the bristle support member, then it is tilted from the inside outwards when its free end is inclined towards the right side of the bristle support member. Through the triple oriented groups of bristle bundles it is possible, without special inclination of the toothbrush head, to clean the flat portions of the teeth as well as the interproximal and gingival areas of the teeth in an equally effective manner. The bundles of bristles perpendicular to the first group ensure complete cleaning of the flat portions of the teeth. In contrast, the bundles of slanted bristles of the second and third group clean the interproximal and gingival areas of the teeth. The special arrangement of the inclined bristle bundles, ie the inclination of all the bundles of bristles in the same transverse row towards the same side, that is from the inside to the outside, has the effect that all the ends of the bundles of bristles of the second group, which are inclined for example from left to right, point in the direction of the gingival margin and clean there when the toothbrush is coupled against one half of the jaw. At the same time, all the ends of the bundles of bristles of the third group, which are then inclined inverted from right to left, then point in the direction of the surfaces of occlusion of the teeth, allowing them to penetrate into the interproximal area of the teeth. teeth. Using a simple cleaning motion parallel to the row of the teeth, this results in a simultaneous cleaning of different areas, ie the average flat portions of the teeth, the gingival area and the interproximal area of the teeth, without it being necessary for the head of the toothbrush to be inclined in a special way. The dental brush head of the invention, when it is placed without inclination on a jaw half, joins in this case the technique referred to with the Bass technique, whereby the toothbrush is placed so that the ends of bristles are inclined towards the gingival area of the teeth, and the technique referred to as Charters technique, with which the toothbrush is placed in such a way that the bristle bundles are oriented away from the margin gingival to the area of occlusion of the teeth. If the toothbrush head is coupled parallel to the row of teeth against the facial or lingual tooth surfaces, then the bristle ends of the bent bristle bundles are aligned along the tooth axis. The bundles of bristles of an inclination direction move towards the gingival margin while the bundles of bristles oriented in the opposite direction move toward the chewing surfaces. Due to the dimensions and arrangement of the bundles, the bristle ends of the bristle bundles of one inclination direction end in the area of the gingival margin while the bristle ends of the bundles of bristles inclined in the other direction, reach , when placed in position, within the interproximal area in particular due to the result of the proposed arrangement, they are not obstructed by other bundles of bristles. The bristles of the bristles of perpendicular bristles end in the easy or lingual surfaces. Accordingly, the toothbrush should not be moved successively into different defined portions to clean the different areas of the tooth. Effective cleaning of the different areas takes place concurrently even during a simple movement along the row of teeth referred to as the horizontal cleaning technique. In this arrangement, the bundles of bristles of the inclined transverse rows can be inclined only in a direction transverse to the longitudinal axis of the toothbrush so that they extend in a plane perpendicular to the longitudinal axis of the toothbrush. In this way, the cleaning effect described above of the interproximal area and the gingival area of the teeth can be achieved in an excellent manner. In a further alternative aspect of the invention, the bundles of bristles of the second and / or third group can also have, in addition to their inclination transverse to the longitudinal axis of the toothbrush, a component of inclination in the direction of the longitudinal axis of the toothbrush. Through a slight inclination also in the direction of the longitudinal axis of the toothbrush, it is possible to improve the penetration of the bundles of bristles inclined correspondingly into the interproximal spaces, in particular during horizontal cleaning. With this configuration, the forward inclined beams penetrate into the interproximal spaces when the brush is propelled forward. The bundles are tilted back into the interproximal spaces when the brush is pushed back. In general it is not necessary that the bundles of bristles placed in a transverse row have the same inclination. For example, bundles of bristles that are anchored more outwardly in the bristle support member may exhibit a greater inward inclination than bundles of bristles that are placed further inwardly in the bristle support member. However, in a further aspect of the invention, all the bundles of bristles placed in a common transverse row are of a similar inclination. This produces a uniform cleaning effect of a respective transverse row of bundles of slant bristles. Provided that they are placed respectively in a common transverse row, then, in particular the bundles of bristles of the second and third group are placed in a common plane which, otherwise, it does not have differently inclined bristles or perpendicularly raised bristles. The bundles of bristles placed in a common plane are all inclined to the same side and are not obstructed by bundles of bristles that are tilted differently or perpendicularly raised. In this way, a collision between the bundles of differently inclined bristles is avoided. Penetration within the interproximal area of the tooth on the one hand and cleaning of the gingival area of the teeth on the other hand become even more efficient. In principle it would be conceivable that the bristle ends of the different groups of bristle bundles are located in a common plane. However, in a further aspect of the invention the bristle bundles of the second and / or third group are made to be higher than the bundles of bristles of the first group. In this way the bundles of slanted bristles are better able to penetrate into the interproximal or gingival area, while at the same time the bundles of perpendicularly upright bristles remain vertical on the flat surfaces of the tooth to clean this particular area. In this configuration, it would be conceivable in principle that the bristles within the same group of bristle bundles end up in a common place. Preferably, however, the bristles of the different bundles of bristles of the second group as well as the bundles of bristles of the third group end at different levels. In particular the bundles of bristles in a common transverse row are constructed to be of different height. As such, preferably the bundles of slanted bristles, whose head is located approximately in the center of the bristle area, are built higher than the bundles of slant bristles of the same transverse row that are placed with their head further away towards out towards the edge of the bristle area. In this way, in the longitudinal direction of the head of the toothbrush, it results a roofing contour approximately in the shape of a roof that is defined by the ends of the bundles of slant bristles. Preferably, the heads of the bundles of bristles inclined in a common transverse row form an approximately rectilinear contour which slopes downward towards the outer side of the bristle area. Said rectilinear contours, which are described by the bundles of inclined bristles, are inclined downwards in transverse rows counter-inclined towards opposite sides so that in the entirety of the approximately roof-shaped contour mentioned previously results in the longitudinal direction of the dental brush observing in the area of bristles. Advantageously, the bundles of anti-inclined bristles of the second group and the third group are positioned so that, observing in the longitudinal direction of the toothbrush, the bundles of bristles of the second group overlap at least partially the bundles of teeth. sows of the third group and vice versa. Advantageously, the arrangement is selected so that each bundle of bristles of the second group, observing in the longitudinal direction of the toothbrush, overlaps at least one bundle of bristles of the third group and vice versa. In a further aspect of the invention, the bristle area has a higher density of bristle bundles in its head or functional area than in the leg area in the bristle support member. The base area of the bristle area, which is defined by the leg of the bristle bundle in the bristle support member, is at least as large as the functional area of the bristle area defined by the beam heads of bristles. Due to the inclination of the bristle bundles of the second and third group from the inside to the outside, an expansion of the bristle area with increasing height of the bristles is prevented. In a further advantageous aspect of the invention, the bristle region comprises at least three transverse rows of bundles of bristles of the second group as well as at least three transverse rows of bundles of bristles of the third group. Preferably, in this configuration the transverse rows of the bristle bundles of the second group and the transverse rows of the bristle fibers of the third group are placed alternately one behind the other in the longitudinal direction of the toothbrush. The bundles of bristles placed perpendicularly of the first group are advantageously placed between the transverse rows of the second and third group. In particular, a pair of transverse rows of bundles of bristles of the second group and bundles of bristles of the third group are followed in the longitudinal direction of the toothbrush by bundles of bristles of the first group before a pair of transversal rows of bundles follows again. of sows of the second and third group. By placing the bundles of bristles of the second and third group in planes perpendicular to the longitudinal axis of the toothbrush, the bundles of bristles of the first group can be placed in the same manner as in the transverse rows perpendicular to the longitudinal axis of the brush. dental. However, if the bundles of bristles of the second and third group are bi-axial, ie placed both transverse to the longitudinal axis of the toothbrush and parallel to it, inclined and / or placed in planes that are inclined at an acute angle to the axis longitudinally of the toothbrush, then the bundles of bristles of the first group can be combined to form triangular sections of bristle area between respective transverse rows of bundles of slant bristles. The bundles of bristles of the three groups can generally have the same cross section, different cross-sectional shapes being possible. For example, the bundles of bristles may have a rounded, angular or elongated cross section. According to an advantageous embodiment of the invention, bundles of bristles perpendicularly upright from the first group can be provided to have a cross section that differs from the cross section of the bristle bundles of the second and third group. In particular, the bristle bundles of the first group can essentially have an approximately circular cross section. In contrast, in a further aspect of the invention, the bristle bundles of the second and third group may have an approximately rectangular cross section, with the cross section extending with their longitudinal sides parallel to the external contour of the respective transverse row in the which is the respective bristle bundle. The degree of inclination of the bristle bundles of the second and third group may, in general, be selected to differ. According to a preferred embodiment of the invention, the bundles of bristles of the second and third group are inclined relative to one perpendicular in the plane of support of bristles at an angle of 5 ° to 45 °, preferably 15 ° to 30 °, approximately. In particular, the bristle bundles can be inclined with respect to the perpendicular in the bristle support plane at an angle of approximately 20 ° to 25 °. These and other additional features which, in combination and sub-combination, can form the subject matter of the present invention will become apparent not only from the claims but also from the following description and the associated drawing with reference to which the preferred embodiments of the invention will be explained. In the drawing, Figure 1 is a perspective view of a toothbrush head of a manual toothbrush having a bristle area according to a first preferred embodiment of the invention; Figure 2 is a pective view of a toothbrush head of a manual toothbrush according to a second preferred embodiment of the invention; Figure 3 is an end view of the toothbrush head of Figure 2; Figure 4 is a side view of the toothbrush head of Figures 2 and 3; and Figure 5 is a top plan view of the bristle area of the toothbrush head of Figures 2 to 4 above. Each of the toothbrush heads 1 illustrated in the drawing comprises an approximately plate-like bristle support member 2 to which a plurality of bristle bundles are attached, which combine to form a region of bristles 3. bundles of bristles can be attached to the bristle support member 2 in a variety of ways. For example, they can be anchored on the bristle support member 2 by means of an anchoring beam forming method or they can be integrally molded in the bristle support member 2 through an injection molding method or can be be fastened to the bristle support member 2 with a welding method. The bristle bundles are divided into three different groups of bristle bundles. A first group of bristle bundles 4 is positioned essentially perpendicular to the plane defined by the bristle support member 2. A second group of bristle bundles 5 is inclined in a direction transverse to the longitudinal axis of the head of the toothbrush 7. towards the first side of the head of the toothbrush, while the third group of the bundles of bristles 6 is likewise inclined in a direction transverse to the longitudinal axis of the head of the toothbrush 7 although in the direction opposite to the head of the toothbrush. toothbrush.

In the embodiment of the toothbrush head 1 shown in Figure 1, the bristle bundles are placed in transverse rows in the bristle support member 2. As shown in Figure 1, the bundles of bristles arranged perpendicularly 4 of the first group are placed in five transverse rows together in the bristle support member 2, each transverse row accommodating between two and four bundles of bristles 4. Placed between the respective transverse rows of the bristle bundles 4 of the first group is a row transverse of bundles of bristles of the second group and a transverse row of bundles of bristles 6 of the third group so that all the transverse rows of bundles of bristles from the first group, the second group and the third group alternate with each other. The bundles of bristles 5 of the second group, which are placed in a common transverse row, are located in a common plane extending essentially perpendicular to the longitudinal axis 7 of the toothbrush head 1. In this arrangement, all the bundles of bristles 5 of the second group have the same angle of inclination towards the same side. Similarly, the bundles of bristles 6 of the third group, which are placed in a common transverse row, have the same angle of inclination towards the opposite side, being located in a common plane. The inclination angle 8 of the bristle bundles 5 of the second group is preferably about 85 ° to 55 ° relative to the plane defined by the bristle support member 2 (cf. FIG. 1). The angle of inclination of the bundles of bristles 6 of the third group is of equal size but oriented towards the opposite side of the toothbrush head 1. In the embodiment shown in figures 2 to 5, the bundles of bristles inclined 5 of the second group and the bundles of inclined bristles 6 of the third group are combined in the same way in transverse rows. In the embodiment of Figures 2 to 5, the bundles of bristles 5 of the second group as well as the bundles of bristles 6 of the third group have an inclination both parallel to and parallel to the longitudinal axis of the toothbrush 7. As shown in particular in Figure 5, the bundles of bristles 5 and 6 are placed in transverse rows that do not extend at right angles in a direction transverse to the longitudinal axis 7 but slightly obliquely in a direction transverse to the longitudinal axis 7. In the modality shown (see figure 5), the transverse rows adopt an angle of 40 ° to 60 °, approximately, with respect to the longitudinal axis 7. The bundles of bristles 5 and 6, each one that are joined to the bristle support member 2 in a transverse row, are oriented so that they extend in a common plane and have the same inclination in said plane, as shown in figure 3. It will be understood, of course, that here also the bundles of bristles 5 of the second group are inclined towards one side of the member of bristle support 2 while the bristle bundles 6 of the third group are inclined towards the other side of the bristle support member 2. In the embodiment shown, respectively two bundles of bristles 5 of the second group and two bundles of bristles are provided. sows 6 of the third group per transverse row. The angle of inclination of said bundles of bristles 5 and 6 of the second and third group, respectively relative to the perpendicular 9 in the bristle support plane reaches, in the mode shown, up to about 20 °. As shown in Figure 3, the bundles of bristles 5 and 6 of the second and third group are inclined from the inside outwards also in the embodiment of Figures 2 to 5. The base of the bundles of bristles 5 and 6 attached to the The bristle support member 2 is offset, when viewed in a whole transverse row, towards a lateral edge of the bristle area 3, with the respective bristle bundles 5 and 6 extending with their tips towards each other side of the area of sows 3 and from there inwards. As shown in Figure 3, not all bristle bundles 5 and 6 have the same length or height. The arrangement is selected so that the bundles of bristles 5a and 6a that are located with their head in the center of the bristle area 3 have a greater height than the bundles of bristles 5b and 6b that are located with their head more towards the Exterior. In this configuration, the free ends of the bundles of bristles 5 and 6 are coordinated with each other in height so that the bundles of bristles 5 and 6 placed in the same transverse row define with their heads a rectilinear contour that slopes down towards the external side of the bristle area 3 (see figure 3). As such, the ends of the bundles of bristles 5 and 6 inclined to different sides define contours that slope downwards in the direction of opposite sides so that a complete pitched roof covering contour is defined by means of the ends of the bundles of inclined bristles 5 and 6 (see figure 3). As shown in Figures 2 and 4, in this second embodiment the bundles of bristles 5 and 6 again are not obstructed in bending towards and from their inclination plane by the other bundles of bristles that were placed perpendicular or are inclined from another way. In each transverse row of bundles of inclined bristles 5 or 6 there are only bundles of bristles of the same inclination. In the planes that are defined by the bundles of bristles of a transverse row, the area of bristles 3 is constructed devoid of other bristles. Placed between the transverse rows of bundles of slant bristles 5 and 6 are bundles of bristles 4 of the first group which are perpendicular to the plane of the bristle support member 2. As shown in Figures 2 and 5, the bundles of bristles 4 of the first group are placed in triangular zones of bundles of bristles between the rows of the bundles of slant bristles 5 and 6 so that after a zone of bundles of bristles 4 of the first group follows, observing in the longitudinal direction of the head of toothbrush 1, a transverse row of bristle bundles 5 of the second group and then a transverse row of bundles of bristles 6 of the third group, this sequence repeated several times to the extent that several transverse rows of bundles of slant bristles are provided 5 and 6. (see figure 5). With this configuration, the bundles of bristles 4 of the first group are constructed shorter than the bundles of bristles 5 and 6 of the second and third group. The bundles of bristles 5 and 6 of the second and third group have greater height so that, as a result of their projection on the bundles of bristles 4 perpendicularly upright, they are better able to penetrate the interproximal area and within the subgingival area of the teeth. In the embodiment shown in figure 3, the bundles of inclined bristles projecting 5 and 6 in the center of the bristle area 3 have a height that is greater by 20% up to 30%, approximately, than the height of the beams of 4 perpendicular bristles of the first group. As shown in figures 3 and 5, the external contour, in particular the widest points of the bristle area 3, is defined by the bundles of perpendicularly upright bristles 4 of the first group. The bundles of slant bristles 5 and 6 of the second and third group extend within the circumference of the bristle area 3, which is defined by the bundles of perpendicular bristles 4. The bundles of bristles 4 of the first group further have a section cross-section that differs from the cross-section of the bundles of slant bristles 5 and 6. While the bundles of perpendicularly upright bristles 4 have an approximately circular cross-section (see Figure 2), the bundles of slant bristles 5 and 6 have a thin rectangular cross section

Claims (17)

(see Figures 4 and 5), with the longitudinal sides of this rectangular cross section extending parallel to the respective plane in which the bundles of bristles 5 and 6 are placed in the same transverse row. CLAIMS

1. A toothbrush head with a bristle support member (2) in which a region of bristles (3) is placed comprising a plurality of bundles of bristles (4, 5, 6), the bundles of bristles (4, 5, 6) which include three differently inclined groups of bristle bundles of which a first group (4) is placed essentially perpendicular to the plane (10) of the bristle support member, a second group (5) is inclined at a direction transverse to the longitudinal axis of the toothbrush head (7) towards a first side, and a third group (6) is inclined in a direction transverse to the longitudinal axis of the toothbrush head (7) towards a second opposite side , with the bundles of inclined bristles (5; 6) of the second and third group that are placed in transverse rows in the bristle support member (2), characterized in that each transverse row of bundles of bristles (5; 6) all the bundles of bristles (5; 6) are tilted towards the same side, the inclination d e said bundles of bristles (5; 6) which is from the inside out.

2. The toothbrush head according to the preceding claim, characterized in that the bundles of inclined bristles (5; 6) in each transverse row are placed in a common plane in which the area of bristles (3) is free from the bristles. bundles of bristles perpendicular and free of the bundles of anti-inclined bristles.

The toothbrush head according to any of the preceding claims, characterized in that the bristle bundles (5; 6) of each transverse row have the same degree of inclination.

4. The toothbrush head according to any of the preceding claims, characterized in that the bristle bundles (5; 6) of the second and / or third group, in addition to being inclined in a direction transverse to the longitudinal axis of the toothbrush head (7), also exhibit an inclination in the direction of the longitudinal axis of the toothbrush head (7).

5. The toothbrush head according to any of the preceding claims, characterized in that the bristle bundles (5; 6) of the second and / or third group are constructed to be taller than the bundles of bristles (4) of the first group.

The toothbrush head according to any of the preceding claims, characterized in that the bristle bundles (5; 6) in a common inclined transverse row are constructed to be of different height.

The toothbrush head according to any one of the preceding claims, characterized in that the bundles of inclined bristles (5; 6) having their head in the center of the bristle area are of greater height than the bundles of bristles ( 5; 6) placed in the same transverse row with their head facing outwards.

The toothbrush head according to any of the preceding claims, characterized in that the heads of the bundles of inclined bristles (5; 6) in a common transverse row form a roughly rectilinear contour that slopes downwards in the direction toward the toothbrush. outer side of the bristle area (3).

9. The toothbrush head according to any of the preceding claims, characterized in that the heads of the inclined bristle bundles (5; 6) of the second and third group define a cover contour approximately in the form of a gable roof whose longitudinal axis extends parallel to the longitudinal axis of toothbrush (7).

10. The toothbrush head according to any of the preceding claims, characterized in that, observing in the longitudinal direction of the toothbrush head, the bundles of bristles (5) of the second group and the bundles of bristles (6) of the toothbrush. third group overlap each other at least in part.

11. The toothbrush head according to any of the preceding claims, characterized in that the base area of the bristle area (3), which is defined by the bristle bundle leg in the bristle support member (2), is at least as large as the functional area of the bristle. area of bristles (3) defined by the heads of the bristle bundles. The dental brush head according to any one of the preceding claims, characterized in that several transverse rows of bundles of bristles (5) of the second group are provided as well as several transverse rows of the bundles of bristles (6) of the third group and , observing in the longitudinal direction of the toothbrush, transverse rows of bundles of bristles (5) of the second group and bundles of bristles (6) of the third group are placed in alternation. The dental brush head according to the preceding claim, characterized in that, observing in the longitudinal direction of the toothbrush, the bundles of bristles (4) of the first group are placed between the transverse rows of the second group (5) and the transverse rows of the third group (6), with the bundles of bristles (4, 5, 6) of the first, second and third group that are preferably placed alternately one after the other. The toothbrush head according to any of the preceding claims, characterized in that the bristle bundles (4) of the first group have a cross section that differs from the cross section of the bundles of bristles (5).; 6) of the second and third group. The toothbrush head according to any of the preceding claims, characterized in that all the bristle bundles (4) of the first group have essentially the same cross section, preferably an approximately circular cross section. The dental brush head according to any of the preceding claims, characterized in that all the bundles of bristles (5; 6) of the second group and of the third group essentially have the same cross section, preferably a cross section approximately rectangular, the longitudinal sides thereof extending parallel to the longitudinal direction of the respective transverse row in which the bundles of bristles are placed. The toothbrush head according to any of the preceding claims, characterized in that the bristle bundles (5; 6) of the second and third group are inclined relative to a perpendicular (9) in the plane of support of bristles in an angle of 5 ° to 45 °, preferably 10 ° to 30 °, in particular 15 ° to 25 °, approximately.