Oral Care Devices

Abstract

Disclosed herein are various oral care devices and bristle patterns for oral care devices, including bristle patterns for toothbrush heads, finger toothbrushes, and tongue cleaning devices. The bristle pattern of the brush head can include a first bristle region having a first bristle core and a first outer bristle layer at least partially disposed around the first bristle core, and a second bristle region disposed proximal to the first bristle region, the second bristle region having a second bristle core and a second outer bristle layer at least partially disposed around the second bristle core. When viewed from above, the first bristle region can have a first convex outer boundary, and the second bristle region can have a second convex outer boundary, and the transition region can include an inflection between the first convex outer boundary and the second convex outer boundary.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to U.S. Provisional Patent Application No. 63 / 411,026, filed September 28, 2022, and U.S. Provisional Patent Application No. 63 / 404,116, filed September 6, 2022, the entire contents of each of which are incorporated by reference in their entirety for all purposes.

[0002] The field relates to oral care devices, and in particular to bristle patterns for toothbrush heads, finger toothbrushes, and tongue cleaning devices. [Background technology]

[0003] Bristle toothbrushes and other oral care devices have been used by humans for centuries, yet tooth and gum disease remains a serious condition worldwide. Many toothbrushes are ineffective at cleaning interdental spaces and small crevices and recesses within teeth. The various tongue cleaning devices used today do not effectively clean the user's tongue. Furthermore, cleaning someone else's teeth can be inconvenient. Therefore, there remains a need for improved oral care devices. Summary of the Invention [Means for solving the problem]

[0004] In one embodiment, the toothbrush head may include a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction of the toothbrush head that is non-parallel to the transverse direction, the base having a proximal portion along the longitudinal direction and a distal portion opposite the proximal portion, and a plurality of bristles extending from the base along a bristle direction of the toothbrush head that is non-parallel to the longitudinal and transverse directions. The plurality of bristles may be arranged in a bristle pattern, the bristle pattern comprising: a first bristle region having a first bristle core and a first outer bristle layer at least partially disposed around the first bristle core, the first bristle core having a first core contact surface when viewed in a side cross section defined by the bristle direction and the longitudinal direction; a second bristle region disposed proximal to the first bristle region, the second bristle region having a second bristle core and a second outer bristle layer at least partially disposed around the second bristle core, the second bristle core having a second core contact surface when viewed in a side cross section; and a transition region between the first bristle region and the second bristle region. When viewed from a top surface defined by the longitudinal and transverse directions, the first bristle region may have a first convex outer boundary, the second bristle region may have a second convex outer boundary, and the transition region may include an inflection between the first and second convex outer boundaries.

[0005] In some embodiments, the first core contact surface is non-concave and the second core contact surface is non-concave. In some embodiments, the brushing surfaces of each of the first and second outer bristle layers are substantially flat. In some embodiments, the bristles include a first peak disposed in the first outer bristle layer near a distal portion of the base, a second peak disposed in the transition region, and a third peak disposed in the second outer bristle layer near a proximal portion of the base. In some embodiments, the bristles include a first valley disposed in the first outer bristle layer between the first and second peaks and a second valley disposed in the second outer bristle layer between the second and third peaks. In some embodiments, the first core contact surface includes one or more bristles that are shorter in the bristle direction than the bristles at the first and second peaks but longer than the bristles at the first valley, and the second core contact surface includes one or more bristles that are shorter in the bristle direction than the bristles at the second and third peaks but longer than the bristles at the second valley. In some embodiments, the first outer hair layer has a first concave outer contact surface when viewed in side cross section, and the second outer hair layer has a second concave outer contact surface when viewed in side cross section. In some embodiments, the first and second concave outer contact surfaces comprise continuously varying surface normals. In some embodiments, the first and second concave outer contact surfaces are angled inward toward the respective first and second bristle cores. In some embodiments, at least 75% of the total surface area of ​​the first and second concave outer contact surfaces comprise a surface normal that is non-parallel to the bristle direction. In some embodiments, at least 75% of the total surface area of ​​the first and second concave outer contact surfaces is non-parallel to the top surface. In some embodiments, the first bristle core is substantially circular when viewed from the top surface, and the second bristle core is substantially circular when viewed from the top surface. In some embodiments, the first bristle region includes a first core contact surface and a brushing surface at least partially defined by the distal ends of the bristles in the first outer bristle layer, the brushing surface having a first curvature in the distal end region and a second curvature in an inner region between the distal end region and the transition region, the second curvature being greater than the first curvature. In some embodiments, the inner region includes a valley between the first peak in the distal end region and the second peak in the transition region. In some embodiments, the first brushing angle between the brushing surface in the distal end region and the longitudinal direction is greater than the second brushing angle between the brushing surface in the inner region and the longitudinal direction. In some embodiments, the toothbrush head can include a first gap between the first bristle core and the first outer bristle layer, the first gap being greater than the maximum spacing between two adjacent bristles in the plurality of bristles. In some embodiments, the toothbrush head can include a second gap between the second bristle core and the second outer bristle layer, the second gap being greater than the maximum spacing between two adjacent bristles in the plurality of bristles. In some embodiments, the first and second gaps are devoid of bristles. In some embodiments, when viewed from the top, the first bristle region has a first concave inner boundary and the second bristle region has a second concave inner boundary. In some embodiments, the first convex outer boundary is continuous with the second concave inner boundary, and the second convex outer boundary is continuous with the first concave inner boundary.In some embodiments, the first bristle region has a first length along the longitudinal direction, and the second bristle region has a second length along the longitudinal direction, the first length being greater than the second length. In some embodiments, the first length is within a range of 3 mm to 15 mm, and the second length is within a range of 3 mm to 15 mm. In some embodiments, the width of at least one of the first bristle region and the second bristle region is within a range of 4 mm to 16 mm. In some embodiments, the width of at least one of the first and second bristle cores is within a range of 1 mm to 6 mm. In some embodiments, the bristle pattern comprises a brace-receiving recess extending along the longitudinal direction. In some embodiments, at least one of the first and second core contact surfaces is substantially planar. In some embodiments, at least one of the first and second core contact surfaces is convex. In some embodiments, the first convex outer boundary has a first curvature in the longitudinal direction and a second curvature in the transverse direction that is different from the first curvature. In some embodiments, the brushing surface of the first bristle region has a first curvature in the longitudinal direction and a second curvature in the transverse direction that is different from the first curvature.

[0006] In another embodiment, the toothbrush head may include a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction of the toothbrush head that is non-parallel to the transverse direction, the base having a proximal portion along the longitudinal direction and a distal portion opposite the proximal portion, and a plurality of bristles extending from the base along a bristle direction of the toothbrush head that is non-parallel to the longitudinal and transverse directions. The plurality of bristles may be arranged in a bristle pattern, the bristle pattern including: a first central occlusal cleaning region extending from the distal portion; a first annular section at least partially surrounding the first central occlusal cleaning region, the first annular section configured to overlap at least the buccal and lingual surfaces of the first tooth in use; a second central occlusal cleaning region extending from the proximal portion; and a second annular section at least partially surrounding the second central occlusal cleaning region, the second annular section configured to overlap at least the buccal and lingual surfaces of the second tooth in use. and a second annular section, the first tooth being distal to the second tooth.

[0007] In some embodiments, the first annular section includes a first outer bristle layer, the second annular section includes a second outer bristle layer, and the plurality of bristles include a first peak in the first outer bristle layer, a second peak in a transition region between the first and second outer bristle layers, and a third peak in the second outer bristle layer. In some embodiments, the plurality of bristles include a first valley between the first and second peaks and a second valley between the second and third peaks. In some embodiments, the transition region includes an inflection between the first and second bristle regions. In some embodiments, the first and second annular sections connect at the second peak. In some embodiments, the first central occlusal cleaning region includes a first bristle core having a first non-concave core contact surface, and the second central occlusal cleaning region includes a second bristle core having a second non-concave core contact surface. In some embodiments, the toothbrush head can include a first gap between the first bristle core and the first outer bristle layer, the first gap being larger than the maximum spacing between two adjacent bristles in the plurality of bristles. In some embodiments, the toothbrush head can include a second gap between the second bristle core and the second outer bristle layer, the second gap being larger than the maximum spacing between two adjacent bristles in the plurality of bristles. In some embodiments, the first and second gaps are devoid of bristles. In some embodiments, when viewed from the top, the first annular section has a first convex outer boundary and a first concave inner boundary, and the second annular section has a second convex outer boundary and a second concave inner boundary. In some embodiments, the first convex outer boundary is continuous with the second concave inner boundary, and the second convex outer boundary is continuous with the first concave inner boundary. In some embodiments, the first and second central occlusal cleaning regions are substantially planar.

[0008] In another embodiment, the toothbrush head may include a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction that is non-parallel to the transverse direction, the base having a proximal portion and a distal portion opposite the proximal portion along the longitudinal direction, and a plurality of bristles extending from the base along a bristle direction that is non-parallel to the longitudinal and transverse directions. The plurality of bristles may be arranged in a bristle pattern, the bristle pattern comprising: a first bristle region having a first bristle core and a first outer bristle layer at least partially disposed around the first bristle core, the first outer bristle layer shaped to clean at least the convex side of at least the first tooth and the first bristle core shaped to clean at least the occlusal surface of the first tooth; a second bristle region having a second bristle core and a second outer bristle layer at least partially disposed around the second bristle core, the second outer bristle layer shaped to clean at least the convex side of the at least second tooth and the second bristle core shaped to clean at least the occlusal surface of the second tooth; and a transition region between the first bristle region and the second bristle region. The plurality of bristles may have a first peak in a first bristle region adjacent a distal portion of the base, a second peak in a transition region, and a third peak in a second bristle region adjacent a proximal portion of the base.

[0009] In some embodiments, the transition region includes an inflection between the first bristle region and the second bristle region.

[0010] In another embodiment, the toothbrush head may include a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction of the toothbrush head that is non-parallel to the transverse direction, the base having a proximal portion along the longitudinal direction and a distal portion opposite the proximal portion, and a plurality of bristles extending from the base along a bristle direction of the toothbrush head that is non-parallel to the longitudinal and transverse directions. The plurality of bristles may be arranged in a bristle pattern, the bristle pattern including a first bristle region having an outer boundary and a first outer bristle layer extending inward from the outer boundary of the first bristle region toward a central portion of the first bristle region, the outer boundary of the first bristle region including a first distal peak, a lateral valley, and a second proximal peak for contacting a first tooth surface in use. and a second bristle region disposed proximal to the first bristle region, the second bristle region having an outer boundary and a second outer bristles layer extending inward from the outer boundary of the second bristle region toward a central portion of the second bristle region, the outer boundary of the second bristle region configured to overlap at least a buccal side and a lingual side of a second tooth proximal to the first tooth in use. The second proximal peak of the first outer bristles layer may be disposed in a transition region between the first bristle region and the second bristle region.

[0011] In some embodiments, the bristle pattern further comprises a first bristle core and a second bristle core, wherein the first outer bristle layer at least partially surrounds the first bristle core and the second outer bristle layer at least partially surrounds the second bristle core.

[0012] In another embodiment, the toothbrush head may include a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction of the toothbrush head that is non-parallel to the transverse direction, the base having a proximal portion along the longitudinal direction and a distal portion opposite the proximal portion, and a plurality of bristles extending from the base along a bristle direction of the toothbrush head that is non-parallel to the longitudinal and transverse directions, the plurality of bristles being arranged in a bristle pattern including a bristle region having a bristle core and an outer bristle layer at least partially disposed around the bristle core. When viewed from a top surface defined by the longitudinal and transverse directions, the bristle region may have an outer boundary having a first curvature in the longitudinal direction and a second curvature in the transverse direction that is different from the first curvature. A distal end of the bristle region may at least partially define a brushing surface, the brushing surface having a third curvature in the longitudinal direction and a fourth curvature in the transverse direction that is different from the third curvature.

[0013] In some embodiments, the first and second curvatures comprise convex curvatures, hi some embodiments, the third and fourth curvatures comprise concave curvatures.

[0014] In another embodiment, a method of manufacturing a user-specific toothbrush head is disclosed, the method including receiving data regarding the structure of one or more teeth of a user, determining a bristle pattern for one or more teeth of the user based at least in part on the received data regarding the structure, and manufacturing a toothbrush head having the bristle pattern.

[0015] In some embodiments, receiving data regarding the user's one or more tooth structures includes receiving or capturing an image of the user's one or more teeth. In some embodiments, receiving data regarding the user's one or more tooth structures includes obtaining dimensional information for the user's one or more teeth. In some embodiments, determining a bristle pattern includes selecting a bristle pattern from a plurality of predetermined bristle pattern designs. In some embodiments, the method includes manufacturing a replacement toothbrush head having the bristle pattern. In some embodiments, the method includes obtaining updated data regarding the user's one or more teeth and determining a new bristle pattern for the user based at least in part on the obtained updated data regarding the user. In some embodiments, receiving data regarding the user's one or more tooth structures includes receiving dimensions of the user's multiple distal-most teeth. In some embodiments, receiving data regarding the user's one or more tooth structures includes receiving dimensions of the user's two distal-most teeth. In some embodiments, obtaining data regarding the user's one or more tooth structures includes receiving dimensions of the user's two molar teeth. In some embodiments, manufacturing the toothbrush head includes manufacturing a toothbrush head as disclosed in any of the embodiments set forth herein.

[0016] In another embodiment, a method for manufacturing a user-specific toothbrush head is disclosed. can include manufacturing a toothbrush head having a bristle pattern based at least in part on data regarding one or more tooth structures of a user.

[0017] In some embodiments, the method may include receiving data regarding the structure of one or more teeth and determining a bristle pattern for one or more teeth of the user based at least in part on the received data regarding the structure.

[0018] Another aspect of the present disclosure is a tongue cleaning device including a base and a plurality of bristles extending non-parallel from a first side of the base, The tongue cleaning device further includes a first cleaning blade extending non-parallel from a second side of the base opposite the first side.

[0019] A variation of the above embodiment further includes a plurality of bumps disposed on the second side.

[0020] A variation of the above aspect further includes a handle, the base being disposed at a distal end of the handle.

[0021] In a variation of the above aspect, at least one of the base and the cleaning blade comprises stainless steel.

[0022] A variation of the above embodiment is for the base to comprise stainless steel.

[0023] A variation on the above embodiment is for the cleaning blade to comprise a polymeric material.

[0024] A variation of the above embodiment is for the plurality of bumps to comprise stainless steel.

[0025] A variation of the above embodiment further includes a second tongue cleaning blade on the second side, the second tongue cleaning blade spaced apart from the first tongue cleaning blade.

[0026] Another aspect of the present disclosure is a tongue cleaning device including a base formed of stainless steel, at least one tongue cleaning protrusion extending from the base, the tongue cleaning protrusion including at least one of a cleaning blade and a plurality of bumps.

[0027] In a variation of the above embodiment, the at least one tongue cleaning protrusion includes a cleaning blade and a plurality of bumps.

[0028] A variation on the above embodiment is for the cleaning blade to comprise a polymeric material.

[0029] A variation of the above embodiment is for the plurality of bumps to comprise stainless steel.

[0030] In a variation of the above aspect, the cleaning blade and the plurality of bumps are disposed on a first side of the base, and the plurality of bristles extend from a second side of the base opposite the first side.

[0031] Another aspect of the present disclosure is a finger toothbrush including a finger sleeve sized and shaped to receive a user's finger, a brush head base coupled to the finger sleeve, and a plurality of bristles extending non-parallel from the brush head base, and a bite block coupled to the finger sleeve or the brush head base.

[0032] In a variation of the above embodiment, the bite block comprises a material having a higher modulus of elasticity than the finger sleeve.

[0033] A variation of the above embodiment is one in which the bite block is coupled to the brush head base.

[0034] In a variation of the above embodiment, the bite block is coupled to the side of the finger sleeve opposite the brush head base.

[0035] In a variation of the above embodiment, the bite block is arranged in a ring shape along the side of the finger sleeve.

[0036] In a variation of the above embodiment, the bite block is disposed on a distal portion of the finger sleeve.

[0037] The present disclosure will be described with reference to the accompanying drawings, in which like reference numerals refer to like elements. [Brief explanation of the drawings]

[0038] [Figure 1A] FIG. 1 is a front top perspective view of a brush head according to an exemplary embodiment of the present disclosure. [Figure 1B] FIG. 1B is an enlarged view of the brush head of FIG. 1A. [Figure 1C] FIG. 1B is a side view of the brush head of FIG. 1A. [Figure 1D] FIG. 1B is a side view of the brush head of FIG. 1A. [Figure 1E] FIG. 1B is a bottom view of the brush head of FIG. 1A. [Figure 1F] FIG. 1B is a top view of the brush head of FIG. 1A. [Figure 1G] FIG. 1B is a front view of the brush head of FIG. 1A. [Figure 1H] FIG. 1B is a rear top perspective view of the brush head of FIG. 1A. [Figure 1I] FIG. 1B is a side view of the brush head of FIG. 1A. [Figure 1J] FIG. 1B is an enlarged rear top perspective view of the brush head of FIG. 1A. [Figure 1K] FIG. 1C is a cross-sectional side view of the brush head of FIG. 1F taken along line KK. [Figure 1L] FIG. 1B is a top view of the brush head of FIG. 1A. [Figure 1M] FIG. 1B is a side perspective view of the brush head of FIG. 1A. [Figure 1N] FIG. 10 is a top front perspective view of a brush head according to another embodiment of the present disclosure. [Figure 1O] FIG. 1C is a side view of the brush head of FIG. 1N. [Figure 1P] FIG. 10 is a top view of a brush head according to another embodiment of the present disclosure. [Figure 2A] FIG. 10 is a top front perspective view of a brush head according to another embodiment of the present disclosure. [Figure 2B] FIG. 2B is a top view of the brush head of FIG. 2A. [Figure 2C] FIG. 2B is a front view of the brush head of FIG. 2A. [Figure 3A] FIG. 10 is a top front perspective view of a brush head according to another embodiment of the present disclosure. [Figure 3B] FIG. 10 is a top front perspective view of a brush head according to another embodiment of the present disclosure. [Figure 3C] FIG. 3C is a front view of the brush head of FIG. 3B. [Figure 3D] FIG. 10 is a front view of a brush head according to another embodiment of the present disclosure. [Figure 4A]FIG. 1 is a top front perspective view of a tongue scraper according to an exemplary embodiment of the present disclosure. [Figure 4B] FIG. 4B is a bottom, front perspective view of the tongue scraper of FIG. 4A. [Figure 5] (A) A top rear perspective view of a tongue scraper according to another embodiment of the present disclosure. (B) A top rear perspective view of a tongue scraper according to another embodiment of the present disclosure. (C) A bottom front perspective view of the tongue scraper of Figure 5(B). (D) A bottom front perspective view of the tongue scraper of Figure 5(A). [Figure 6A] FIG. 2 is a side view of a finger brush according to an exemplary embodiment of the present disclosure. [Figure 6B] FIG. 10 is a side view of a finger brush according to another embodiment of the present disclosure. [Figure 6C] FIG. 10 is a side view of a finger brush according to another embodiment of the present disclosure. [Figure 6D] FIG. 10 is a side view of a finger brush according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0039] Conventional toothbrushes are designed regardless of the shape of your teeth. They cannot efficiently clean smaller, hard-to-reach areas, such as surfaces between the occlusal surfaces, especially distal teeth such as molars. In addition, people's teeth and gums are of various sizes and shapes, and each person has teeth with different functions and configurations. There remains a need for a toothbrush that can better reach hard-to-reach areas, fit all or most of a user's teeth, and be customizable for people with different tooth shapes and configurations.

[0040] Various embodiments disclosed herein relate to toothbrush head bristle pattern designs and methods for customizing toothbrush bristle patterns for a user. More specifically, the bristle patterns can be configured to easily and efficiently reach hard-to-reach areas, including areas between the teeth, areas near the gum line, occlusal surfaces, etc. Furthermore, the toothbrush bristle patterns can be customized based on the particular shape and size of the user's teeth and gums to clean a particular user's teeth more effectively than a generic toothbrush.

[0041] I. Bristle patterns for toothbrush heads In various embodiments, bristle patterns according to the present disclosure can be implemented on toothbrush heads for manual or power toothbrushes. In some embodiments, the bristle patterns can be implemented on the complete toothbrush, including the handle. In other embodiments, the bristle patterns can be implemented on replaceable toothbrush heads to allow for easy and regular replacement and wide compatibility with different types of toothbrushes.

[0042] Various embodiments of bristle patterns according to the present disclosure are shown in Figures 1A-3D. For example, the bristle pattern of a brush head 100 may include a first bristle region 102 shaped to clean a first tooth, a second bristle region 104 shaped to clean a second tooth, and a transition region 106 between the first bristle region 102 and the second bristle region 104 (see Figure 1A). Each bristle region may have a generally concave profile so that the bristles can conform to at least the buccal and / or lingual surfaces of convex teeth. The bristles at the distal and proximal sides of each of the bristle regions (e.g., distal portion 180 and proximal portion 110 as shown in Figure 1I) may be longer than the bristles in the center (e.g., inner region 170 as shown in Figure 1I), creating a concave profile for the bristle pattern. The longer bristles proximal to the first bristle region and distal to the second bristle region can form a transition region including ridges for effectively reaching and cleaning the spaces between adjacent teeth when a user brushes the buccal, lingual, or occlusal surfaces of the teeth. The longer bristles distal to the first bristle region and proximal to the second bristle region can similarly clean the spaces between adjacent teeth or any other hard-to-reach regions that can be reached separately.

[0043] In various embodiments, the left and right sides of each of the bristle regions can be configured to clean the gum line and / or interdental spaces of a user's mouth. Human gum lines can have various curvatures. When a user brushes the buccal or lingual surfaces of one or more teeth, the sides of the bristle regions can be shaped to conform to the gum line of the user's teeth, thereby better cleaning areas of the teeth adjacent to the gum line and the spaces between the gums and the teeth. In some embodiments, to accommodate gum lines that typically curve toward the gums, the sides of the bristle pattern can be shaped to curve outward relative to the sides. The contour of a bristle pattern including two bristle regions can substantially form an "S" shape, an "infinity" shape, or an "8" shape, as shown in the figures.

[0044] 1A-1P, the brush head 100 can include a base 108 having a width along a transverse direction y of the brush head 100 and a length along a longitudinal direction x of the brush head 100 that is non-parallel to the transverse direction y. The base 108 can have a proximal portion 110 and a distal portion 180 opposite the proximal portion 110 along the longitudinal direction x. The plurality of bristles can extend along the length of the brush head 100 that is non-parallel to the longitudinal direction x and the transverse direction y. 1A-1O, the bristles may extend from the base 108 along the bristle direction z. It should be understood that individual bristles are not shown in Figures 1A-1O, but rather are shown in a bristle pattern that is shown as a continuum for ease of illustration. One skilled in the art will understand that the illustrated bristle pattern may include a plurality of bristles, for example, more than 100 bristles, more than 500 bristles, more than 1000 bristles, more than 5000 bristles, or more than 10,000 bristles, e.g., 15,000 bristles or more.

[0045] As shown in FIGS. 1I-1J, the plurality of bristles of the brush head 100 can be arranged in a bristle pattern including a first bristle region 102 including a first central occlusal cleaning region 120 extending from a distal portion 180 and a first annular section 122 at least partially surrounding the first central occlusal cleaning region 120. The first annular section 122 can be configured to overlie at least the buccal and lingual surfaces of the first tooth during use. The first central occlusal cleaning region 120 can include a first bristle core 103, as shown in FIGS. 1A-1D, 1F, and 1H-1M. The first annular section 122 can include a first outer bristle layer 107 at least partially disposed around the first bristle core 103, as shown in FIGS. 1A-1D and 1F-1M. The first bristle core 103 may have a first contact surface (e.g., a first non-concave core contact surface 131) when viewed from a side cross section defined by the bristle direction and the longitudinal direction (see, e.g., FIG. 1K).

[0046] As shown, the bristle pattern can include a second bristle region 104 disposed proximal to the first bristle region 102. The second bristle region 104 can have a second central occlusal cleaning region 140 extending from the proximal portion 110 and a second annular section 124 at least partially surrounding the second central occlusal cleaning region 140 (FIGS. 1I-1J). The second annular section 124 can be configured to overlap at least the buccal and lingual surfaces of a second tooth in use, with the first tooth distal to the second tooth. The second central occlusal cleaning region 140 can include a second bristle core 105. The second annular section 124 can include a second outer bristle layer 109 disposed at least partially around the second bristle core 105. As shown, the second bristle core 105 has a second contact surface 151 (eg, a second non-concave core contact surface) when viewed in side cross section (see FIG. 1K).

[0047] Various embodiments disclosed herein are described in terms of surfaces defined by bristles. For example, the distal ends 181 of the bristles of the first and second bristle cores 103 and 105 can at least partially define a brushing surface 150, including, for example, the respective first and second core contact surfaces. The brushing surface 150 can further be defined at least partially by the distal ends 181 of the bristles of the first and second outer bristle layers 107 and 109, including the first and second concave outer contact surfaces 171 and 191. However, it should be understood that such surface descriptions are approximations of the geometry exhibited by the distal ends 181 of the bristles, and that in various arrangements, bristles within a localized region may be of non-uniform length, and thus the actual surface defined by the distal ends of the bristles may be non-uniform or substantially non-uniform. Accordingly, one skilled in the art will understand that such surface descriptions are intended to approximate the overall profile of the bristle patterns described herein.

[0048] In the illustrated embodiment, the first and second annular sections 122 and 124 (e.g., the first and second outer hair layers 107 and 109) partially surround the first and second bristle cores 103 and 105 such that there may be a space 123 (FIG. 1F) between the transition region 106 and the first and second outer hair layers 107 and 109. The first and second annular sections 122 and 124 may extend around most of the circumference of the respective first and second bristle cores 103 and 105. In some embodiments, the first and second annular sections 122 and 124 may extend around the entirety of the respective first and second bristle cores 103 and 105. For example, the first and second annular sections 122 and 124 may be spaced apart by 180 degrees to 36 degrees. The first and second annular sections 122 and 124 may extend around the hair axis z at an angle in the range of 0 degrees, in the range of 180 degrees to 300 degrees, or in the range of 210 degrees to 270 degrees. For example, the first and second annular sections 122 and 124 may extend around the hair axis z at an angle of at least 180 degrees, at least 210 degrees, at least 270 degrees, or at least 300 degrees.

[0049] 1A-1D, 1E, and 1H-1M, the bristle pattern may include a transition region 106 between the first bristle region 102 and the second bristle region 104. When viewed from a top view defined by the longitudinal direction x and the transverse direction y, the first bristle region 102 may have a first convex outer boundary 127, and the second bristle region 104 has a second convex outer boundary 129 (see FIG. 1F). As shown, the transition region 106 may include an inflection 141 between the first convex outer boundary 127 and the second convex outer boundary 129.

[0050] 1C and 1I-1M, the plurality of bristles may include a first peak 132 disposed in the first outer bristles layer 107 proximate the distal portion 180 of the base 108, a second peak 134 disposed in the transition region 106, and a third peak 136 disposed in the second outer bristles layer 109 proximate the proximal end 110 of the base 108. The plurality of bristles may have a first valley 133 in the first outer bristles layer 107 disposed between the first peak 132 and the second peak 134, and a second valley 135 in the second outer bristles layer 109 disposed between the second peak 134 and the third peak 136, as shown in FIG. 1C. Beneficially, the first, second, and third peaks 132, 134, and 136 may be shaped to clean the interdental spaces between adjacent teeth. The first and second valleys 133 and 135 can include concave surfaces shaped to conform to at least the convex buccal and / or lingual surfaces of the user's teeth. By shaping the peaks and valleys to conform to the surfaces of the user's teeth, cleaning effectiveness can be significantly improved. Although various embodiments describe the surfaces of the bristle patterns as being shaped to or conforming to corresponding surfaces of the teeth (e.g., occlusal, buccal, lingual), any of the portions or surfaces of the bristle patterns described herein can be used to clean any suitable tooth surface. Indeed, one skilled in the art will understand that the flexibility of the bristles can allow the bristles to bend or deflect into recesses or crevices in the teeth.

[0051] 1I and 1J, the first outer bristle layer 107 can include a brushing surface 150 that is at least partially defined by distal ends 181 of the bristles in the first outer bristle layer 107 and that defines, for example, first and second concave outer contact surfaces 171 and 191. As shown in FIGS. 1C and 1K, the first outer bristle layer 107 can have a first concave outer contact surface 171 in a cross-sectional side view, and the second outer bristle layer 109 can have a second concave outer contact surface 191 in a cross-sectional side view. 1I, brushing surface 150 can have a first curvature (R1, e.g., a radius of curvature in some embodiments) proximal to distal portion 180 and a second curvature (R2, e.g., a radius of curvature in some embodiments) in inner region 170 between distal portion 180 and transition region 106, where second curvature R2 is greater (shallower) than first curvature R1. The curvature of brushing surface 150 in transition region 106 and proximal portion 110 can also be steeper than the curvatures of first and second valleys 133 and 135 in inner region 170. Thus, first curvature R1 can be steeper or more angled than second curvature R2. Inner region 170 can include first valley 133 between first peak 132 in distal portion 110 and second peak 134 in transition region 106. 11, a first brushing angle θ between the brushing surface 150 in the distal end region and the longitudinal direction x is greater than a second brushing angle θ between the brushing surface 150 in the inner region 170 and the longitudinal direction x. The steeper angles of the brushing surface 150 in the distal portion 180, the transition region 106, and the proximal portion 110 may be shaped to match the steeper convex angles of the interdental surfaces of the user's teeth. The shallower angle of the inner region 170 may be shaped to match the steeper convex angles of the interdental surfaces of the user's teeth. The curvature (R1, R2) can be shaped to match the shallower or flatter convexity of the buccal and / or lingual surfaces of the toothbrush. By matching the curvature (R1, R2) to the sides of the user's teeth, cleaning effectiveness can be further improved.

[0052] In some embodiments, the occlusal cleaning surfaces of the first and second bristle cores 103 and 105 can be shaped to clean at least the occlusal surfaces of a user's teeth. For example, the first non-concave core contact surface 131 of the first bristle core 103 can include one or more bristles that are shorter in the bristle direction z than the bristles at the first and second peaks 132 and 134 but longer than the bristles at the first valley 133. The second non-concave core contact surface 151 of the second bristle core 105 can include one or more bristles that are shorter in the bristle direction z than the bristles at the second and third peaks 134 and 136 but longer than the bristles at the second valley 135. By using bristles that are longer than the bristles in the first and second valleys 133 and 135, the bristle cores 103 and 105 can reach into the concave recesses and gaps on the occlusal surfaces of a user's teeth. Furthermore, such a core bristle pattern can allow the bristle cores 103 and 105 to contact the sides of the teeth (e.g., the buccal and lingual surfaces of the teeth). The first and second non-concave core contact surfaces 131 and 151 can be flat in some embodiments. In other embodiments, the first and second non-concave core contact surfaces 131 and 151 can be convex to extend to the concave occlusal surfaces of the teeth. As shown in FIG. 1C , the peaks 132, 134, and 136 can extend a first vertical height a above the respective valleys 133 and 135, and the first and second bristle cores 103 and 105 can extend a second vertical height b above the valleys 133 and 135. The vertical heights a and b can be any suitable heights to match the tooth structure of a patient or an average population.

[0053] As shown in FIGS. 1F and 1K, a first gap 153 may be disposed between the first bristle core 103 and the first outer bristle layer 107. A second gap 155 may be disposed between the second bristle core 105 and the second outer bristle layer 109. The first and second gaps 153 and 155 may be larger than the maximum spacing between two adjacent bristles in the plurality of bristles. The first and second gaps 153 and 155 may also be larger than the average spacing between two adjacent bristles in the plurality of bristles. As shown, the first and second gaps 153 and 155 may be devoid of bristles. However, in other embodiments, the first and second gaps 153 and 155 may be approximately the same as the maximum or average spacing between two adjacent bristles, such that there may not be a larger gap between the first core 103 and the second core 105 and the respective first outer bristle layer 107 and second outer bristle layer 109 compared to the maximum or average spacing between adjacent bristles. In the illustrated embodiment, the first bristle core 103 and the second bristle core 105 are substantially circular when viewed from above.

[0054] 1F , the first bristle region 102 can have a first concave inner boundary 142, and the second bristle region 104 can have a second concave inner boundary 144. In the illustrated embodiment, the first convex outer boundary 127 is continuous with the second concave inner boundary 144, and the second convex outer boundary 129 is continuous with the first concave inner boundary 142.

[0055] Beneficially, as described herein, the bristle pattern can be sized and shaped to match the dental structure of a particular user and / or to match the structure of an average human tooth (e.g., average adult tooth). Effectively cleaning distally located teeth, e.g., molars at the back of a user's mouth, can be particularly difficult. Thus, in various embodiments, the bristle pattern can be sized and shaped to generally match the user's (or an average adult's) distal-most teeth (e.g., two). For example, in some embodiments, the bristle pattern can be sized and shaped to match the two distal-most molars of a human user. In other embodiments, the bristle pattern can be sized and shaped to match any selected plurality of the user's teeth. The teeth can be sized and shaped to fit any number of teeth (eg, any selected pair).

[0056] As shown in FIG. 1C , the first bristle region 102 can have a first length L1 along the longitudinal direction x, and the second bristle region 104 can have a second length L2 along the longitudinal direction x. The first length L1 can be measured from the first peak 132 to the second peak 134 of the transition region 106, and the second length L2 can be measured from the second peak 134 to the third peak 136. Generally, the distal-most tooth may be wider than the proximally adjacent tooth. Thus, to better match the lingual and / or buccal surfaces of the two distal-most teeth, the first length L1 (e.g., corresponding to the width of the distal-most tooth) can be greater than the second length L2 (e.g., corresponding to the proximally adjacent tooth). For example, in various embodiments, the first length L1 can be in the range of 3 mm to 15 mm, the range of 6 mm to 15 mm, or the range of 8 mm to 12 mm. The second length L2 can be in the range of 3 mm to 15 mm, in the range of 6 mm to 15 mm, or in the range of 8 mm to 12 mm.

[0057] Similarly, as shown in FIG. 1F , the first and second bristle regions 102 and 104 can have a width W1. The width W1 can be selected to correspond to the approximate height of a user's two most distal teeth. In some embodiments, the width W1 of the first and second bristle regions 102 and 104 can be approximately the same. In other embodiments, the width W1 of the first bristle region 102 and the width W1 of the second bristle region 104 can be different. For example, the width W1 of at least one of the first and second bristle regions 102 and 104 can be in the range of 4 mm to 16 mm, in the range of 6 mm to 15 mm, or in the range of 8 mm to 12 mm.

[0058] Additionally, the width W2 of the first and second bristle cores 103 and 105 can be selected to fit within the occlusal surfaces of a user's teeth. For example, the width W2 of at least one of the first and second bristle cores 103 and 105 can be in the range of 1 mm to 6 mm, 2.5 mm to 5 mm, 1 mm to 3 mm (e.g., for a child's toothbrush head), or 4.5 mm to 6 mm (e.g., for an average adult toothbrush). It should be understood that the examples described herein contemplate shaping and sizing the bristle pattern to match the two distal-most teeth of a particular user or average human. In other embodiments, the bristle pattern can be selected based on other teeth of a user or human population.

[0059] 1L and 1M, in some embodiments, at least a portion of the brushing surface 150 can include a continuously varying surface normal N. Unless otherwise noted, the components in FIGS. 1L and 1M can be the same as or generally similar to the similar components described with respect to FIGS. 1A-1K. As shown in FIG. 1M, the first and second concave outer contact surfaces 171 and 191 of the brushing surface 150 can be arranged in an at least partially annular pattern around the interior region including the bristle cores 103 and 105. The brushing surface 150 can be angled at least partially inward toward the interior region such that the normal N of the brushing surface 150 includes a directional component directed inward toward the bristle cores 103 and 105. As shown, the surface normal A can vary continuously along the surface as the brushing surface 150 extends around the interior region, for example, in a racetrack pattern. At least 50% of the total surface area of ​​the first concave outer contact surface 171 and the second concave outer contact surface 191 can include a surface normal N that is non-parallel to the bristle direction z. For example, at least 75%, at least 85%, at least 90%, at least 95%, or at least 99% of the total surface area of ​​the first concave outer contact surface 171 and the second concave outer contact surface 191 can include a surface normal A that is non-parallel to the bristle direction z. In various embodiments, 75% to 95%, or 75% to 90% of the total surface area of ​​the first and second concave outer contact surfaces 171 and 191 can include a surface normal A that is non-parallel to the bristle direction z. In various embodiments, A majority of the total area can be disposed non-parallel to the top plane defined by the transverse direction y and the longitudinal direction x. For example, at least 75%, at least 90%, or at least 95% of the total area of ​​the first and second concave outer contact surfaces 171 and 191 can be disposed non-parallel to the top plane.

[0060] Beneficially, the curvature of the brushing surface 150 can be matched to the user's anatomy. For example, the inwardly curved surfaces of the first concave outer contact surface 171 and the second concave outer contact surface 191 can be shaped to overlap and cover the sides of the teeth, e.g., the buccal and lingual surfaces of the teeth, which can improve cleaning effectiveness. Furthermore, as described above in connection with FIG. 1I , the curvature R1 (e.g., radius of curvature) of the brushing surface 150 at or near the distal portion 180, the transition region 106, and the proximal portion 110 can be smaller (e.g., steeper) than the curvature R2 (e.g., radius of curvature) of the brushing surface 150 at or near the inner region 170, which includes the first and second valleys 133 and 135. The steeper curvatures nearer the distal region 180, the transition region 104, and the proximal region 110 can be shaped to match the steep convexity of the interdental spaces of the teeth.

[0061] Further, in the illustrated embodiment of FIG. 1M , the curvature of the bristles can vary along both the longitudinal direction x (also referred to as the mesial-distal direction) and the transverse direction y (also referred to as the occlusal-gingival direction). For example, as shown in FIG. 1F , the outer boundary 121 as shown in top view can have different curvatures (e.g., different convex curvatures) along the longitudinal direction x and along the transverse direction y. Further, as shown in FIG. 1M , the brushing surface 150 can additionally or alternatively have different curvatures (e.g., different concave curvatures) along the longitudinal direction x and along the transverse direction y. Varying curvatures along the longitudinal direction x and the transverse direction y can advantageously allow the bristle pattern to conform to the dental anatomy. While two bristle regions 102 and 104 are shown in FIGS. 1A-1M , it should be understood that in other embodiments, only a single bristle region 302 (e.g., a round or circular region) may be provided on the toothbrush head 300, as shown in FIG. 1P . For example, in Figure 1P, the outer bristle layer 307 (e.g., a single outer bristle layer) may be disposed around the bristle core 305 (e.g., a single bristle core). Similar to Figures 1L-1M, the outer boundary as shown in top view may have different curvatures (e.g., different convex curvatures) along the longitudinal direction x and along the transverse direction y. Further, as explained above, the brushing surface 150 may additionally or alternatively have different curvatures (e.g., different concave curvatures) along the longitudinal direction x and along the transverse direction y.

[0062] 1N-1O show another example of a bristle pattern of a brush head 200 according to various embodiments. Unless otherwise noted, features of the bristle patterns of FIGS. 1N-1O may be the same as or generally similar to like components in FIGS. 1A-1M. For example, the bristle pattern of the brush head 200 may include a first bristle region 202 having a first bristle core 203 and a first outer bristle layer 207 at least partially disposed around the first bristle core 203. The first bristle core 203 may have a first core contact surface when viewed in cross-section defined by the bristle direction and the longitudinal direction. The bristle pattern may include a second bristle region 204 disposed proximal to the first bristle region 202. The second bristle region 204 may have a second bristle core 205 and a second outer bristle layer 209 at least partially disposed around the second bristle core 205. The second bristle core 205 may have a second core contact surface when viewed in cross-sectional side view. The transition region 206 may be disposed between the first bristle region 202 and the second bristle region 204. For example, similar to the embodiment of FIG. 1F , when viewed in a top view defined by the longitudinal and transverse directions, the first bristle region 202 may have a first convex outer boundary 227, the second bristle region 204 may have a second convex outer boundary 229, and the transition region 206 may include an inflection 241 between the first convex outer boundary 227 and the second convex outer boundary 229.

[0063] 1A-1M, brushing surface 250 in FIGS. 1N-1O may be substantially planar. For example, brushing surface 250 of first and second outer bristle layers 207 and 209 may be substantially planar. First and second cores 203 and 205 may also be substantially planar. Compared to conventional toothbrushes, transition region 206 with inflection 241 may beneficially enable a user to clean spaces between adjacent teeth and along the gum line.

[0064] According to various embodiments, each of the bristle outer layer and bristle core may also be implemented with different sizes (e.g., all thick bristles or bristles of variable thickness, etc.), materials (e.g., polymers such as nylon, polybutylene terephthalate, or PBT, etc.), and shapes (e.g., tapered ends, flat ends, etc.). Unless otherwise noted, the features of FIGS. 2A-2C may be the same as or generally similar to similarly referenced components in FIGS. 1A-1K. As shown in FIGS. 2A-2C, another embodiment of a bristle pattern on a brush head 400 according to the present disclosure may have first and second outer bristle layers, each formed of a plurality of round bristles. The bristle pattern may include bristles of various shapes, for example, tapered bristles at least along the perimeter of the bristle pattern. The bristle pattern shown in FIGS. 2A-2C may include one or more of the features, components, and / or details in any combination with any of the other features, components, and / or details of any other embodiment of the devices, systems, and methods disclosed herein.

[0065] In addition, it may be advantageous to create bristle patterns in multiple different sizes and shapes to accommodate users with different tooth structures. In some embodiments, the bristle pattern can be determined specifically for the user after consulting with the user or after obtaining data regarding the user's tooth structure. Another embodiment includes a method of taking an image of the user's teeth and determining the shape and geometry of the bristle pattern that will most effectively clean the user's teeth. The bristle pattern can be implemented on a replaceable brush head so that it can be replaced periodically to maintain bristle firmness and effectiveness. The replaceable brush head can also be configured to be compatible with a variety of manual or power toothbrush handles.

[0066] In various embodiments, a user or clinician can obtain data regarding the structure of one or more of the user's teeth. For example, a clinician can capture image data (e.g., x-ray image data) of the user's teeth. In other embodiments, a user can use a visual image camera (e.g., in a cell phone) to image the teeth. Based on the image data, the structure for one or more of the user's teeth can be extracted. As explained above, in some embodiments, it may be beneficial to dimension the bristle pattern based on the user's two most distal teeth, in which case image data of the two most distal teeth can be obtained. In other embodiments, other teeth can additionally or alternatively be imaged.

[0067] A bristle pattern for one or more of a user's teeth can be determined based on data received or acquired about one or more tooth structures. For example, the dimensions of the user's teeth can be measured, including the size and shape of the lingual, buccal, occlusal, and interproximal surfaces. Based on the measurements and profiles of the user's tooth structure, a bristle pattern can be specifically designed for the user's teeth. For example, lengths L1 and L2 and widths W1 and W2 can be selected based at least in part on the user's tooth structure. Brushing angles, peak and valley heights, and any and all other parameters of the bristle pattern described herein can be selected based on the data of the user's tooth structure. The curvature of the brushing surface can be selected to match the user's tooth geometry (or the tooth geometry of an average person in the human population). In various embodiments, the curvatures of the first and second outer contacting surfaces of the first and second outer bristle layers can be selected based on the determined tooth structure. Additionally or alternatively, the curvatures of the first and second core contacting surfaces (e.g., first and second occlusal cleaning regions) can be selected based on the determined tooth structure.

[0068] In various embodiments, the bristle pattern can be determined by selecting a bristle pattern from a plurality of predetermined bristle pattern designs. In other embodiments, a unique bristle pattern can be designed and selected for each user. A user can use a toothbrush over a period of time, and when the bristles wear out, they can order a replacement toothbrush or toothbrush head, in which case the method can manufacture a replacement toothbrush head having the bristle pattern. In some cases, the user's tooth structure can change over time, for example, due to dental procedures or tooth deterioration. In some embodiments, the user's mouth can be imaged again to obtain updated data regarding one or more of the user's teeth. The method can determine a new bristle pattern for the user based at least in part on the obtained updated data regarding the user.

[0069] In various embodiments, the analysis of tooth structure and / or determination of bristle patterns may be implemented by computer code stored on any suitable type of non-transitory computer-readable medium (e.g., computer memory) that, when executed by the process, analyzes tooth structure and determines bristle patterns, and any other steps described in the methods disclosed herein. The processor and / or memory may be part of any suitable computer system. Computer memory may include physical computer storage, including hard drives, solid-state memory, random access memory (RAM), read-only memory (ROM), optical disks, volatile or non-volatile storage, combinations thereof, and the like. The methods may also be transmitted or received as data signals over various computer-readable media, including wireless-based and / or wired-based media. The results of the disclosed processes or process steps may be stored, persistently or otherwise, in any type of non-transitory, tangible computer storage and / or communicated via a computer-readable transmission medium.

[0070] Thus, various embodiments disclosed herein advantageously allow for user-specific bristle patterns for toothbrush heads, which can improve cleaning effectiveness.

[0071] II. Brush Design for Teeth with Braces Another aspect of the present disclosure is that the first and second bristle regions can be configured to be suitable for teeth with braces. Unless otherwise noted, features in FIGS. 3A-3D can be the same or generally similar to similarly referenced components in FIGS. 1A-2C. FIGS. 3A-3D illustrate embodiments of bristle patterns for teeth with braces according to the present disclosure. Referring to FIG. 3A, the bristle pattern for braces on the brush head 500 can similarly include first and second bristle regions 502 and 504, each having a bristle outer layer 507 / 509 and a bristle core 503 / 505. In certain embodiments, the brace bristle pattern can further include a brace-receiving recess 501 disposed across the first bristle region 502 and the second bristle region 504 along the longitudinal direction x. Similar to the above embodiments, bristle patterns for teeth with braces can also be implemented using bristles of different sizes, shapes, and materials. FIG. 3B shows one embodiment of a brace bristle pattern implemented with bristles of various shapes and sizes.

[0072] The brace-receiving recess can have a length along the longitudinal direction x, a width along the transverse direction y, and a depth along the hair direction z. In addition, the shape of the brace-receiving recess can be customized by the user. The brace-receiving recesses can vary depending on the shape, type, or size of the braces to be worn by the user. For example, the brace-receiving recesses can be sized and shaped to receive the wires of wired braces to clean around the wires and brackets. As shown in FIG. 3C , the brace-receiving recesses 601 of the brush head 600 can have a rectangular profile when viewed from the front. As shown in FIG. 3D , the brace-receiving recesses 701 of the brush head 700 can also have a triangular profile with curved sides when viewed from the front. Any or all of the length, width, depth, and shape of the brace-receiving recesses can be modified and customized based on the shape, type, or size of the braces to be worn by the user. The brace-receiving recesses can have any suitable profile that represents a cut or notch in the bristle pattern. For example, the brace-receiving recesses can have a linear recess, a wedge, etc. In various embodiments, the width, depth, and / or shape of the recesses can be selected based on the user's teeth and orthodontic anatomy.

[0073] The bristle patterns for the braces disclosed above can include one or more of the features, components, and / or details in any combination with any of the other features, components, and / or details of any other embodiment of the devices, systems, and methods disclosed herein.

[0074] III. Tongue cleaner example Various embodiments disclosed herein relate to a tongue cleaner for cleaning a user's tongue. As shown in FIGS. 4A-4B , a tongue cleaner 1000 according to an exemplary embodiment of the present disclosure may include a tongue cleaner head base 1108 attachable to a tongue cleaner handle 1190. The tongue cleaner 1000 may further include tongue cleaning bristles 1010 disposed on a first side 1100 of the tongue cleaner head base 1108. The tongue cleaning bristles 1010 may include one or more bristle regions, which may be arranged according to a bristle pattern. In some embodiments, the tongue cleaning bristles 1010 may have a bristle pattern including a first bristle region 1002, a second bristle region 1004, a third bristle region 1006, and a fourth bristle region 1008, each spaced apart from one another, as shown in FIG. 4A . The tongue cleaning bristles 1010 may provide a gentle cleaning effect on the tongue. The tongue cleaning bristles 1010 may comprise any suitable material, including, for example, TPR of a desired hardness.

[0075] The tongue cleaner 1000 may further include a tongue cleaning bump 1202 and / or one or more tongue cleaning blades (e.g., a first tongue cleaning blade 1241, a second tongue cleaning blade 1242, and a third tongue cleaning blade 1243) for exfoliating the tongue. The tongue cleaning bump 1202 and / or one or more tongue cleaning blades may remove dead cells, bacteria, and debris from the tongue with greater intensity than the tongue cleaning bristles 1010. As shown in FIG. 4B , in some embodiments, the tongue cleaning bump 1202 and tongue cleaning blades may be disposed on a second side 1200 of the tongue cleaner head base 1108 opposite the first side 1100. The first and third tongue cleaning blades 1241 and 1243 may be disposed proximate the distal end 1180 and the proximal end 1110 of the tongue cleaner head base 1108, respectively. The tongue cleaner 1000 may further include a flat region 1206 disposed between the first, second, and third tongue cleaning blades 1241, 1242, and 1243 and configured to retain discarded dead cells and debris.

[0076] Figures 5(A)-5(D) show other embodiments of the tongue cleaner. The tongue cleaner 2000 / 3000 includes tongue cleaning bristles on a first side of the tongue cleaner head base 2100 and may include one or more tongue cleaning blades on a second side 2200 of the tongue cleaner head 2008 opposite the first side 2100. The tongue cleaning bristles may be arranged in one or more tongue cleaning bristle regions, for example a single bristle region 2002 as shown in Figure 5(B) or first and second bristle regions 2004 as shown in Figure 5(A). 5(B)。 In some embodiments, the tongue cleaning blade may include a tongue cleaning blade 2241 adjacent the distal end 2180 of the tongue cleaning head base 2008 (see FIG. 5(C)). In some embodiments, the tongue cleaning blade may include a tongue cleaning blade 2241 adjacent the distal end 2180 of the tongue cleaning head base 2008 (see FIG. 5(D)). In some embodiments, the tongue cleaning blade may include a tongue cleaning blade 2241 adjacent the distal end 2180 of the tongue cleaning head base 2008 (see FIG. 5(E)). In some embodiments, the tongue cleaning blade may include a tongue cleaning blade 2241 adjacent the distal end 2180 of the tongue cleaning head base 2008 (see FIG. 5(F ... In other embodiments, the tongue cleaning blade may include a first tongue cleaning blade 2242 adjacent to the distal end 2180 of the tongue cleaner head base 2008 and a second tongue cleaning blade 2242 adjacent to a transition region 2006 corresponding to the region between the first tongue cleaning bristle region 2002 and the second tongue cleaning bristle region 2004 (see FIG. 5(D)).

[0077] The tongue cleaning blades of Figures 4A-5(D) may have a stiffness that is greater than the stiffness of the bristles. For example, the bristles may deform or bend during use when cleaning a user's tongue, but the tongue cleaning blade(s) may not bend during use when cleaning a user's tongue. Furthermore, in various embodiments, the width of the tongue cleaning blade(s) extending along the base may be greater than the vertical height of the blade(s) extending from the base. In contrast, the bristles may have a vertical height extending from the base that is greater than the width of an individual bristle.

[0078] Advantageously, various components of the tongue cleaners of FIGS. 4A-5D can be made of stainless steel, which can beneficially improve a user's oral hygiene and reduce wear on the tongue cleaner. For example, any or all of the tongue cleaner head base, bump, tongue cleaning blade, and handle can be formed of stainless steel. In various embodiments, at least the base comprises stainless steel. In some embodiments, the blade can comprise a polymer or plastic material. In some embodiments, the blade can also comprise stainless steel. In some embodiments, the bump can further comprise stainless steel. Advantageously, the use of stainless steel for the base (and, in various embodiments, other components) can reduce bad breath. For example, stainless steel material can bind with sulfur to reduce malodor in a user's mouth.

[0079] The tongue cleaners disclosed above may include one or more of the features, components, and / or details in any combination with any of the other features, components, and / or details of any other embodiment of the devices, systems, and methods disclosed herein.

[0080] IV. Finger Brush Design Another aspect of the present disclosure includes finger toothbrushes that include a finger sleeve instead of a handle for use as a finger brush, for example, to clean an infant's or child's teeth and / or gums. Various embodiments of finger toothbrushes are shown in FIGS. 6A-6D . Referring to FIG. 6A , a finger brush 4000 according to the present disclosure can include a brush head base 4008 disposed on a finger sleeve 4030 configured to be attached to a finger. The finger brush 4000 can further include bristles 4010 disposed on the brush head base 4008. In some embodiments, the finger brush 4000 can include a bite block 4040 attached to or disposed within the brush head base 4008 and configured to prevent teeth from biting into the brush head base 4008 (see FIG. 6A ). In some embodiments, the finger brush 5000 / 6000 / 7000 also includes a finger sleeve bite block 5050 / 6050 / 7050 disposed on or within a portion of the finger sleeve 5030 / 6030 / 7030 to prevent teeth from biting into the finger sleeve and damaging the fingers inside the finger sleeve. Thus, in some embodiments, the bite block 5050 is disposed on or within the finger sleeve 5030 on the side of the finger sleeve 5030 opposite the brush head base 5008. The bite block 7050 can be coupled to or disposed within a pocket of the finger sleeve 6030 (e.g., FIG. 6B). In other embodiments, the bite block 6050 can be coupled to or disposed within a pocket of the finger sleeve 6030 in a ring shape around the interior of the finger sleeve 6030 such that the bite block 6050 extends around the user's finger (e.g., FIG. 6C). In some embodiments, as shown in FIG. 6D, the bite block 7050 can be coupled to or disposed within the finger sleeve 7030 at a distal end portion of the finger sleeve 7030. For example, the bite block 7050 can be positioned such that at least a portion of the bite block 7050 is disposed at the distal end of the brush head base 7008. According to various embodiments, the bite block can comprise any material that is sufficiently rigid to withstand bite forces. For example, in some embodiments, the bite blocker can include metal (e.g., steel, aluminum, etc.), plastic or polymer, ceramic, silicone, etc. The bite blocker can be formed of a different material than the sleeve. In some embodiments, the bite blocker can also be formed of the same material as the sleeve, but with a greater thickness to provide a cushion against bites by infants or children. In various embodiments, the bite blocker can be stiffer and / or have a higher modulus of elasticity than the sleeve. A finger brush equipped with a bite blocker can reduce pain associated with bites by infants or children.

[0081] The finger brushes disclosed above may include one or more of the features, components, and / or details in any combination with any of the other features, components, and / or details of any other embodiment of the devices, systems, and methods disclosed herein.

[0082] Unless the context clearly dictates otherwise, throughout this specification and the claims, words such as "comprise," "comprising," "include," "including," and the like, are to be construed in an inclusive sense, i.e., "including, but not limited to," as opposed to an exclusive or exhaustive sense. The word "coupled," as generally used herein, refers to two or more elements that are directly connected or may be connected through one or more intermediate elements. Similarly, the word "connected," as generally used herein, refers to two or more elements that are directly connected or may be connected through one or more intermediate elements. Furthermore, the words "herein," "above," "below," and words of similar import, when used in this application, shall refer to this application as a whole and not to any particular portions of this application. Furthermore, as used herein, when a first element is described as being "on" or "above" a second element, the first element may be directly on or above the second element, such that the first and second elements are in direct contact, or the first element may be indirectly on or above the second element, such that one or more elements are interposed between the first and second elements. Where the context permits, words in the above Detailed Description using the singular or plural may also include the plural or singular, respectively. The word "or" in reference to a list of two or more items includes all of the following interpretations of that word: any of the items in the list, all of the items in the list, and any combination of the items in the list.

[0083] Furthermore, conditional language used herein, particularly "can," "could," "might," "may," "eg," "for example," "such," "etc." Conditional language such as "as") generally conveys that certain embodiments include certain features, elements, and / or conditions, and that other embodiments do not, unless otherwise specified or understood within the context in which it is used. Thus, such conditional language generally is not intended to imply that features, elements, and / or conditions are in some way required for one or more embodiments.

[0084] While specific embodiments have been described, these embodiments are presented by way of example only and are not intended to limit the scope of the present disclosure. Indeed, the novel devices, methods, and systems described herein may be embodied in a variety of other forms, and various omissions, substitutions, and changes in the form of the methods and systems described herein may be made without departing from the spirit of the present disclosure. For example, while bristle pattern features are presented in a given arrangement, alternative embodiments may achieve similar functionality using different arrangements and / or geometries, and some features may be deleted, moved, added, subdivided, combined, and / or modified. Each of these features may be implemented in a variety of different ways. Any suitable combination of elements and operations of the various embodiments described above may be combined to provide further embodiments. The accompanying claims and their equivalents are intended to cover such forms or modifications as are within the scope and spirit of the present disclosure.

Claims

1. A toothbrush head, comprising: a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction of the toothbrush head that is non-parallel to the transverse direction, the base having a proximal portion and a distal portion opposite the proximal portion along the longitudinal direction; a plurality of bristles extending from the base along a bristle direction of the toothbrush head that is non-parallel to the longitudinal direction and the transverse direction, the plurality of bristles being arranged in a bristle pattern, the bristle pattern comprising: a first bristle region having a first bristle core and a first outer bristle layer at least partially disposed around the first bristle core, the first bristle core having a first core contact surface when viewed in a cross-sectional side view defined by the bristle direction and the longitudinal direction; a second bristle region disposed proximate to the first bristle region, the second bristle region having a second bristle core and a second outer bristle layer disposed at least partially around the second bristle core, the second bristle core having a second core contact surface when viewed in the side cross section; a transition region between the first bristle region and the second bristle region; When viewed from a top surface defined by the longitudinal direction and the transverse direction, the first bristle region has a first convex outer boundary, the second bristle region has a second convex outer boundary, and the transition region includes an inflection between the first convex outer boundary and the second convex outer boundary.

2. The toothbrush head of claim 1 , wherein the first core contact surface is non-concave and the second core contact surface is non-concave.

3. 10. The toothbrush head of claim 1, wherein the brushing surface of each of the first and second outer bristle layers is substantially planar.

4. 3. The toothbrush head of claim 1, wherein the plurality of bristles includes a first peak disposed on the first outer bristle layer adjacent the distal portion of the base, a second peak disposed in the transition region, and a third peak disposed on the second outer bristle layer adjacent the proximal portion of the base.

5. 5. The toothbrush head of claim 4, wherein the plurality of bristles has a first valley in the first outer bristle layer disposed between the first peak and the second peak, and a second valley in the second outer bristle layer disposed between the second peak and the third peak.

6. 6. The toothbrush head of claim 5, wherein the first core contact surface includes one or more bristles that are shorter in the bristle direction than the bristles at the first and second peaks but longer than the bristles at the first valley, and the second core contact surface includes one or more bristles that are shorter in the bristle direction than the bristles at the second and third peaks but longer than the bristles at the second valley.

7. A toothbrush head according to any one of claims 1 to 6, wherein the first outer bristle layer has a first concave outer contact surface when viewed in cross-sectional side view, and the second outer bristle layer has a second concave outer contact surface when viewed in cross-sectional side view.

8. 8. The method of claim 7, wherein the first and second concave outer contact surfaces include continuously varying surface normals. The toothbrush head described.

9. 9. The toothbrush head of claim 7 or 8, wherein the first and second concave outer contact surfaces are angled inwardly towards the respective first and second bristle cores.

10. A toothbrush head according to any one of claims 7 to 9, wherein at least 75% of the total surface area of ​​the first and second concave outer contact surfaces comprises a surface normal that is non-parallel to the bristle direction.

11. A toothbrush head according to any one of claims 7 to 10, wherein at least 75% of the total surface area of ​​the first and second concave outer contact surfaces is non-parallel to the top surface.

12. A toothbrush head according to any preceding claim, wherein the first bristle core is substantially circular when viewed from the top surface, and the second bristle core is substantially circular when viewed from the top surface.

13. 13. The toothbrush head of claim 1, wherein the first bristle region includes the first core contact surface and comprises a brushing surface defined at least in part by distal ends of the plurality of bristles in the first outer bristle layer, the brushing surface having a first curvature in a distal end region and a second curvature in an inner region between the distal end region and the transition region, the second curvature being greater than the first curvature.

14. 14. The toothbrush head of claim 13, wherein the inner region includes a valley between a first peak in the distal end region and a second peak in the transition region.

15. 15. The toothbrush head of claim 13 or 14, wherein a first brushing angle between the brushing surface and the longitudinal direction in the distal end region is greater than a second brushing angle between the brushing surface and the longitudinal direction in the inner region.

16. 16. The toothbrush head of claim 1, further comprising a first gap between the first bristle core and the first outer bristle layer, the first gap being greater than the maximum spacing between two adjacent bristles in the plurality of bristles.

17. 17. The toothbrush head of claim 16, further comprising a second gap between the second bristle core and the second outer bristle layer, the second gap being greater than the maximum spacing between two adjacent bristles in the plurality of bristles.

18. 18. A toothbrush head according to claim 16 or 17, wherein the first and second gaps are devoid of bristles.

19. A toothbrush head according to any preceding claim, wherein, when viewed from above, the first bristle region has a first concave inner boundary and the second bristle region has a second concave inner boundary.

20. 20. The toothbrush head of claim 19, wherein the first convex outer boundary is contiguous with the second concave inner boundary, and the second convex outer boundary is contiguous with the first concave inner boundary.

21. 21. A toothbrush head according to any preceding claim, wherein the first bristle region has a first length along the longitudinal direction, and the second bristle region has a second length along the longitudinal direction, the first length being greater than the second length.

22. The first length is in the range of 3 mm to 15 mm, and the second length is in the range of 3 mm to 15 22. The toothbrush head of claim 21, wherein the thickness is in the range of mm.

23. 23. The toothbrush head of claim 22, wherein the width of at least one of the first bristle region and the second bristle region is in the range of 4 mm to 16 mm.

24. A toothbrush head according to any preceding claim, wherein the width of at least one of the first and second bristle cores is in the range of 1 mm to 6 mm.

25. A toothbrush head according to any preceding claim, wherein the bristle pattern comprises brace-receiving recesses extending along the longitudinal direction.

26. A toothbrush head according to any preceding claim, wherein at least one of the first and second core contact surfaces is substantially planar.

27. A toothbrush head according to any preceding claim, wherein at least one of the first and second core contact surfaces is convex.

28. 28. A toothbrush head according to any preceding claim, wherein the first convex outer boundary has a first curvature in the longitudinal direction and a second curvature in the transverse direction that is different from the first curvature.

29. 29. The toothbrush head of any preceding claim, wherein the brushing surface of the first bristle region has a first curvature in the longitudinal direction and a second curvature in the transverse direction that is different from the first curvature.

30. A toothbrush head, comprising: a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction of the toothbrush head that is non-parallel to the transverse direction, the base having a proximal portion and a distal portion opposite the proximal portion along the longitudinal direction; a plurality of bristles extending from the base along a bristle direction of the toothbrush head that is non-parallel to the longitudinal direction and the transverse direction, the plurality of bristles being arranged in a bristle pattern, the bristle pattern comprising: a first central occlusal cleaning region extending from the distal portion; a first annular section at least partially surrounding the first central occlusal cleaning area, the first annular section configured to overlap at least a buccal surface and a lingual surface of a first tooth in use; a second central occlusal cleaning region extending from the proximal portion; a second annular section at least partially surrounding the second central occlusal cleaning area, the second annular section configured to overlap at least the buccal and lingual surfaces of a second tooth in use, the first tooth being distal to the second tooth.

31. 31. The toothbrush head of claim 30, wherein the first annular section includes a first outer bristle layer, the second annular section includes a second outer bristle layer, and the plurality of bristles includes a first peak in the first outer bristle layer, a second peak in a transition region between the first outer bristle layer and the second outer bristle layer, and a third peak in the second outer bristle layer.

32. 32. The toothbrush of claim 31, wherein the plurality of bristles comprises a first valley between the first peak and the second peak and a second valley between the second peak and the third peak. Chead.

33. 33. The toothbrush head of claim 31 or 32, wherein the transition region includes an inflection between the first bristle region and the second bristle region.

34. A toothbrush head according to any one of claims 31 to 33, wherein the first and second annular sections join at the second peak.

35. 35. The toothbrush head of claim 30, wherein the first central occlusal cleaning region includes a first bristle core having a first non-concave core contact surface, and the second central occlusal cleaning region includes a second bristle core having a second non-concave core contact surface.

36. 36. The toothbrush head of claim 35, further comprising a first gap between the first bristle core and the first outer bristle layer, the first gap being greater than the maximum spacing between two adjacent bristles in the plurality of bristles.

37. 37. The toothbrush head of claim 36, further comprising a second gap between the second bristle core and the second outer bristle layer, the second gap being greater than the maximum spacing between two adjacent bristles in the plurality of bristles.

38. 38. A toothbrush head according to claim 36 or 37, wherein the first and second gaps are devoid of bristles.

39. A toothbrush head according to any one of claims 30 to 38, wherein, when viewed from above, the first annular section has a first convex outer boundary and a first concave inner boundary, and the second annular section has a second convex outer boundary and a second concave inner boundary.

40. 40. The toothbrush head of claim 39, wherein the first convex outer boundary is contiguous with the second concave inner boundary, and the second convex outer boundary is contiguous with the first concave inner boundary.

41. A toothbrush head according to any one of claims 30 to 40, wherein the first and second central occlusal cleaning regions are substantially planar.

42. A toothbrush head, comprising: a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction non-parallel to the transverse direction, the base having a proximal portion and a distal portion opposite the proximal portion along the longitudinal direction; a plurality of bristles extending from the base along a bristle direction that is non-parallel to the longitudinal direction and the transverse direction, the plurality of bristles being arranged in a bristle pattern, the bristle pattern comprising: a first bristle region having a first bristle core and a first outer bristle layer at least partially disposed around the first bristle core, the first outer bristle layer shaped to clean at least a convex side of at least a first tooth, and the first bristle core shaped to clean at least an occlusal surface of the first tooth; a second bristle region having a second bristle core and a second outer bristle layer at least partially disposed around the second bristle core, the second outer bristle layer shaped to clean at least a convex side surface of at least a second tooth, and the second bristle core shaped to clean at least an occlusal surface of the second tooth; a transition region between the first and second bristle regions; The toothbrush head, wherein the bristles have a first peak in the first bristle region adjacent the distal portion of the base, a second peak in the transition region, and a third peak in the second bristle region adjacent the proximal portion of the base.

43. 43. The toothbrush head of claim 42, wherein the transition region includes an inflection between the first bristle region and the second bristle region.

44. A toothbrush head, comprising: a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction of the toothbrush head that is non-parallel to the transverse direction, the base having a proximal portion and a distal portion opposite the proximal portion along the longitudinal direction; a plurality of bristles extending from the base along a bristle direction of the toothbrush head that is non-parallel to the longitudinal direction and the transverse direction, the plurality of bristles being arranged in a bristle pattern, the bristle pattern comprising: a first bristle region having an outer boundary and a first outer layer of bristles extending inward from the outer boundary of the first bristle region toward a central portion of the first bristle region, the outer boundary of the first bristle region having a first distal peak, a lateral valley, and a second proximal peak for contacting a first tooth surface in use; a second bristle region disposed proximal to the first bristle region, the second bristle region having an outer boundary and a second outer bristles layer extending inward from the outer boundary of the second bristle region toward a central portion of the second bristle region, the outer boundary of the second bristle region configured to overlap at least a buccal side and a lingual side of a second tooth proximal to the first tooth in use; The toothbrush head, wherein the second proximal peak of the first outer bristle layer is disposed in a transition region between the first bristle region and the second bristle region.

45. 45. The toothbrush head of claim 44, wherein the bristle pattern further comprises a first bristle core and a second bristle core, the first outer bristle layer at least partially surrounding the first bristle core and the second outer bristle layer at least partially surrounding the second bristle core.

46. A toothbrush head, comprising: a base having a width along a transverse direction of the toothbrush head and a length along a longitudinal direction of the toothbrush head that is non-parallel to the transverse direction, the base having a proximal portion and a distal portion opposite the proximal portion along the longitudinal direction; a plurality of bristles extending from the base along a bristle direction of the toothbrush head that is non-parallel to the longitudinal direction and the transverse direction, the plurality of bristles being arranged in a bristle pattern including a bristle region having a bristle core and an outer bristle layer at least partially disposed around the bristle core; When viewed from a top surface defined by the longitudinal direction and the transverse direction, the bristle region has an outer boundary having a first curvature in the longitudinal direction and a second curvature in the transverse direction that is different from the first curvature; a distal end of the bristle region at least partially defines a brushing surface, the brushing surface having a third curvature in the longitudinal direction and a fourth curvature in the transverse direction that is different from the third curvature.

47. 47. The toothbrush head of claim 46, wherein the first and second curvatures comprise convex curvatures.

48. 48. A toothbrush head according to claim 46 or 47, wherein the third and fourth curvatures comprise concave curvatures.

49. 1. A method of manufacturing a user-specific toothbrush head, the method comprising: receiving data regarding one or more tooth structures of the user; determining a bristle pattern for the one or more teeth of the user based at least in part on the received data regarding the structure; and and manufacturing a toothbrush head having said bristle pattern.

50. 50. The method of claim 49, wherein receiving data regarding the structure of one or more teeth of the user comprises receiving or capturing an image of one or more teeth of the user.

51. 51. The method of claim 49 or 50, wherein receiving data regarding the structure of one or more teeth of the user comprises obtaining dimensional information for one or more teeth of the user.

52. The method of any one of claims 49 to 51, wherein determining the bristle pattern comprises selecting a bristle pattern from a plurality of predetermined bristle pattern designs.

53. 53. The method of any one of claims 49 to 52, further comprising manufacturing a replacement toothbrush head having the bristle pattern.

54. 54. The method of any one of claims 49 to 53, further comprising obtaining updated data regarding the one or more teeth of the user; and determining a new bristle pattern for the user based at least in part on the obtained updated data regarding the user.

55. 55. The method of any one of claims 49 to 54, wherein receiving data regarding the structure of one or more teeth of the user comprises receiving dimensions of a plurality of distal-most teeth of the user.

56. 56. The method of claim 55, wherein receiving data regarding the structure of one or more teeth of the user includes receiving dimensions of the user's two most distal teeth.

57. 57. The method of claim 56, wherein obtaining data regarding the structure of one or more teeth of the user includes receiving dimensions of two molar teeth of the user.

58. A method according to any one of claims 49 to 57, wherein manufacturing the toothbrush head comprises manufacturing a toothbrush head according to any one of claims 1 to 45.

59. A method of manufacturing a user-specific toothbrush head, the method comprising manufacturing a toothbrush head having a bristle pattern based at least in part on data regarding the structure of one or more teeth of a user.

60. 60. The method of claim 59, further comprising receiving the data regarding the structure of the one or more teeth and determining the bristle pattern for the one or more teeth of the user based at least in part on the received data regarding the structure.

61. 1. A tongue cleaning device comprising: A base and a plurality of bristles extending non-parallel from a first side of the base; a first cleaning blade extending non-parallel from a second side of the base opposite the first side; A tongue cleaning device comprising:

62. 62. The tongue cleaning device of claim 61, further comprising a plurality of bumps disposed on the second side.

63. 63. A tongue cleaning device according to claim 61 or 62, further comprising a handle, the base being disposed at a distal portion of the handle.

64. A tongue cleaning device according to any one of claims 61 to 63, wherein at least one of the base and the cleaning blade comprises stainless steel.

65. 65. The tongue cleaning device of claim 64, wherein the base comprises stainless steel.

66. 66. The tongue cleaning device of claim 65, wherein the cleaning blade comprises a polymeric material.

67. A tongue cleaning device according to any one of claims 62 to 66, wherein the plurality of bumps comprise stainless steel.

68. 68. A tongue cleaning device according to any one of claims 61 to 67, further comprising a second tongue cleaning blade on the second side, the second tongue cleaning blade being spaced apart from the first tongue cleaning blade.

69. 1. A tongue cleaning device comprising: a base formed of stainless steel; at least one tongue cleaning protrusion extending from the base; A tongue cleaning device, wherein the tongue cleaning protrusion includes at least one of a cleaning blade and a plurality of bumps.

70. 70. The tongue cleaning device of claim 69, wherein the at least one tongue cleaning protrusion includes the cleaning blade and the plurality of bumps.

71. 71. The tongue cleaning device of claim 70, wherein the cleaning blade comprises a polymeric material.

72. 72. A tongue cleaning device according to claim 70 or 71, wherein the plurality of bumps comprise stainless steel.

73. 73. A tongue cleaning device according to any one of claims 70 to 72, wherein the cleaning blade and the plurality of bumps are disposed on a first side of the base, and a plurality of bristles extend from a second side of the base opposite the first side.

74. A finger toothbrush, a finger sleeve sized and shaped to receive a user's finger; a brush head base coupled to the finger sleeve; a plurality of bristles extending non-parallel from the brush head base; a bite block coupled to the finger sleeve or the brush head base; A finger toothbrush comprising:

75. 75. The finger toothbrush of claim 74, wherein the bite block comprises a material having a higher modulus of elasticity than the finger sleeve.

76. 76. The finger toothbrush of claim 74 or 75, wherein the bite block is coupled to the brush head base.

77. 76. The finger toothbrush of claim 74 or 75, wherein the bite block is coupled to a side of the finger sleeve opposite the brush head base.

78. 76. The finger toothbrush of claim 74 or 75, wherein the bite block is arranged in a ring shape along the side of the finger sleeve.

79. 76. The finger toothbrush of claim 74 or 75, wherein the bite block is disposed on a distal portion of the finger sleeve.

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