Toothbrush

Abstract

A toothbrush is disclosed, in which wing hairs are arranged in a V-shape in left and right sides with respect to the center hairs which are the center toothbrush hairs planted in forward and backward directions in a toothbrush head, and the V-shaped wing hairs of the left and right sides are arranged in a X-shape, and auxiliary hairs are arranged between the forward and backward wing hairs in part of the X-shaped toothbrush hairs. With the above arrangements, a contact surface area of each tooth is widened, and a more effective tooth brushing can be performed in three fossas (mesial fossa (mesial pit), a central fossa (central pit) and a distal fossa (distal pit)), a buccal developmental groove, a lingual developmental groove, an accessory groove, a triangular groove and a buccal groove of a buccal aspect, which correspond to a dental caries portion, an interproximal space in which a food debris might be accumulated, and a contact area peripherals of a buccal aspect in which a food debris might be impacted, so dental caries and tooth diseases (periodontitis) can be advantageously prevented, and a pain due to a temporomandibular disorder and a facial muscle fatigue might be reduced and recovered by protruding a cushion layer from an upper side of a toothbrush.

Description

CLAIM OF PRIORITY

This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from an application earlier filed in the Korean Intellectual Property Office on 21 Dec. 2007 and there duly assigned Serial No. 2007-0135327.

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a toothbrush which is able to significantly reduce dental caries, periodontitis, pain due to temporomandibular disorder or the like which are known as three dental diseases, and in particular to a toothbrush featured in that wing hairs are arranged in a V-shape in left and right sides with respect to the center hairs which are the center toothbrush hairs planted in forward and backward directions in a toothbrush head, and the V-shaped wing hairs of the left and right sides are arranged in a X-shape, and auxiliary hairs are arranged between the forward and backward wing hairs in part of the X-shaped toothbrush hairs. With the above arrangements, a contact surface area of each tooth is widened, and a more effective tooth brushing can be performed in three fossas (mesial fossa (mesial pit), a central fossa (central pit) and a distal fossa (distal pit)), a buccal developmental groove, a lingual developmental groove, an accessory groove, a triangular groove of the occlusal aspect of the maxillomandibular molars and a buccal groove of a buccal aspect which correspond to a dental caries portion, an interproximal space in which a food debris might be accumulated, and a contact area peripherals of a buccal aspect in which a food debris might be impacted, so dental caries and tooth diseases (periodontitis) can be advantageously prevented, and a pain due to a temporomandibular disorder and a facial muscle fatigue might be reduced and recovered by protruding a cushion layer from an upper side of a toothbrush.

DESCRIPTION OF BACKGROUND ART

Generally, as shown in FIG. 1, occlusal aspect of a human's molar is formed in a concave shape consisting of three fossas, buccal developmental groove, lingual developmental groove, accessory groove, and triangular groove. The above fossa consists of mesial fossa, central fossa and distal fossa formed in the outside of mesial pit, central pit and distal pit, respectively. The above fossas are linked via a central developmental groove and consist of a buccal developmental groove and a lingual developmental groove extended from a central fossa (here, a lingual developmental groove of the occlusal aspect of the maxillary molar is extended from a distal fossa), and an accessory groove and a triangular groove extended from a mesial fossa, and an accessory groove and a triangular groove extended from a distal fossa.

However, the conventional toothbrush is formed in a straight arrangement structure in a leftward and rightward direction of a head, so a tooth contact surface area is narrow, and an effective tooth brushing work cannot be performed with respect to a concave portion of a molar occlusal aspect. In addition, it is impossible to effectively brush an interproximal space in which a molar buccal aspect food debris is accumulated, and a buccal contact area peripheral in which a food debris might be impacted.

SUMMARY OF THE INVENTION

Accordingly, it is an object of the present invention to provide a toothbrush featured in that first a contact surface area of each tooth is widened, and a more effective tooth brushing can be performed in three fossas (mesial fossa (mesial pit), a central fossa (central pit) and a distal fossa (distal pit)), a buccal developmental groove, a lingual developmental groove, an accessory groove, a triangular groove of the occlusal of the maxillomanbular molars and a buccal groove of a buccal aspect which correspond to a dental caries portion, an interproximal space in which a food debris might be accumulated, and a contact area peripherals of a buccal aspect in which a food debris might be impacted, so dental caries and tooth diseases (periodontitis) can be advantageously prevented, and second a pain due to a temporomandibular disorder and a facial muscle fatigue might be reduced and recovered by protruding a cushion layer from an upper side of a toothbrush.

To achieve the above objects, there is provided a toothbrush featured in that first through sixth toothbrush hairs having a X-shaped wing hair formed with respect to central hairs are arranged in parallel in the forward and backward directions of a toothbrush hair, and a toothbrush hair has straight wing hairs, and the above toothbrush hairs are configured to form a diamond shape with a curve and to widen in an outward direction for thereby well matching with a structure that an accessory groove and a triangular groove extended from a mesial fossa, a central fossa and a distal fossa of maxillomandibular molars of a natural tooth are widened.

To achieve the above objects, there is provided a toothbrush which is characterized in that a central hair of each wing hair is formed in a + shape with its center being formed in a conical shape with a protruded height of 1-2 mm, and a central hair of each wing hair is formed in a circular shape with its center being formed in a conical shape with a protruded height of 1-2 mm, and each central hair has a 2 mm interval from its neighboring hair, and the length from a front wing hair of a first toothbrush hair to a rear wing hair of a sixth toothbrush hair is 1.7 cm, and a wing hair is less than a 2 mm interval from its neighboring hair, and the widths between the front and rear wing hairs of the second and fifth toothbrush hairs is wider than the width of the front and rear wing hairs of the first, third, fourth and sixth toothbrush hairs, and the first through third toothbrush hairs are configured with their both ends being higher than their centers, and with an asymmetrical curve configuration being formed with respect to a ½ portion in one direction about the central axis, and fourth and sixth toothbrush hairs are configured with their both sides being parallel and being inclined toward their central portions and being narrowed, and a front auxiliary hair is formed between the front and rear wing hairs of the second toothbrush, and the front and rear auxiliary hairs have the same height and width as the central portion of the central hair and are spaced apart as much as the width of the central portion of the central hair, and a rear auxiliary hair is formed between the front and rear wing hairs of the fifth toothbrush, and the rear auxiliary hair is configured with its height being gradually decreased in an outward direction, and a barrier wall is formed between the toothbrush hairs so as to prevent the inclination of toothbrush hair, and a toothbrush is formed of a plate body, and a plate body is formed of a rubber or a group of hairs, and a dome shaped cushion layer is formed on an upper side of the toothbrush head, and a second cushion layer smoother than the first cushion layer is formed on an upper side of the first cushion layer in a band shape.

EFFECTS

The present invention is advantageously characterized in that toothbrush hairs are arranged in a V-shape in left and right sides with respect to a central hair which is a central toothbrush hair in the forward and backward directions of a toothbrush head, and the V-shaped toothbrush hairs of the left and right sides are arranged in a X-shape, and an auxiliary hair is arranged between the front and rear wing hairs of the second and fifth toothbrush hairs. The above construction well matches with a concave structure (fossa, accessory groove, triangular groove, buccal developmental groove, lingual developmental groove, buccal groove of a buccal aspect) of a tooth which corresponds to a dental caries portion. In addition, it is possible to more effectively remove the accumulation of food debris and to more effectively brush an interpoximal space having a poor brushing effect, and a contact area that a food debris might be easily impacted therein.

In addition, a pain due to a temporomandibular disorder and a facial muscle fatigue might be reduced and recovered by protruding a cushion layer from an upper side of a toothbrush.

Since a barrier wall is formed between toothbrush hairs for thereby preventing an inclination of toothbrush hairs, and a toothbrush brand might be formed therein.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete appreciation of the invention, and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein:

FIG. 1 is a view illustrating an occlusal aspect of maxillary first and second molars.

FIG. 2 is a plane view of the present invention.

FIG. 3 is an exemplary view of a second toothbrush hair among first through third toothbrush hairs according to the present invention.

FIG. 4 is an exemplary view of a fifth toothbrush hair among fourth through sixth toothbrush hairs according to the present invention.

FIG. 5 is an exemplary view of a central hair according to the present invention.

FIG. 6 is a side view of a molar for showing an application of a third toothbrush hair among first through third toothbrush hairs according to the present invention.

FIGS. 7 and 8 are views of a buccal aspect of a molar for showing an application of a toothbrush according to the present invention.

FIG. 9 is an exemplary view of first through third toothbrushes according to another embodiment of the present invention.

FIG. 10 is an exemplary view of fourth through sixth toothbrushes according to another embodiment of the present invention.

FIG. 11 is a plane view of another embodiment of the present invention.

FIG. 12 is a plane view of further another embodiment of the present invention.

FIG. 13 is a plane view of an upper structure of a toothbrush head according to the present invention.

FIG. 14 is a front view of FIG. 13.

DETAILED DESCRIPTION OF THE INVENTION

The preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a view illustrating a toothbrush according to the present invention. As shown therein, the toothbrush comprises a head 10 featured in that X-shaped first through sixth toothbrush hairs 11, 12, 13, 14, 15 and 16 are arranged in parallel in forward and backward directions. Central hairs a1, a2, a3, a4, a5 and a6 are formed in the centers of the first through sixth toothbrush hairs 11, 12, 13, 14, 15 and 16, respectively. Front auxiliary hairs d1 and e1 are arranged in both sides of the second toothbrush hair 12, and rear auxiliary hairs d2 and e2 are arranged in both sides of the fifth toothbrush hair 15.

The first toothbrush hair 11 is configured as a front wing hair b1 and a rear wing hair b2 are arranged in series in a V-shape in one side of the central hair a1, and a front wing hair c1 and a rear wing hair c2 are formed in series in a V-shape in the opposite side, which are arranged in a X-shape with respect to the central hair a1.

The second toothbrush hair 11 is configured as a front wing hair b3 and a rear wing hair b4 are arranged in series in a V-shape in one side of the central hair a2, and a front wing hair c3 and a rear wing hair c4 are formed in series in a V-shape in the opposite side, which are arranged in a X-shape with respect to the central hair a2.

The front auxiliary hairs d1 and e1 are formed between the front and rear wing hairs b3 and b4, c3 and c4.

The third toothbrush hair 13 is configured as a front wing hair b5 and a rear wing hair b6 are arranged in series in a V-shape in one side of the central hair a3, and a front wing hair c5 and a rear wing hair c6 are formed in series in a V-shape in the opposite side, which are arranged in a X-shape with respect to the central hair a3.

The fourth toothbrush hair 14 is configured as a front wing hair b7 and a rear wing hair b8 are arranged in series in a V-shape in one side of the central hair a4, and a front wing hair c7 and a rear wing hair c8 are formed in series in a V-shape in the opposite side, which are arranged in a X-shape with respect to the central hair a4.

The fifth toothbrush hair 15 is configured as a front wing hair b9 and a rear wing hair b10 are arranged in series in a V-shape in one side of the central hair a5, and a front wing hair c9 and a rear wing hair c10 are formed in series in a V-shape in the opposite side, which are arranged in a X-shape with respect to the central hair a5.

The rear auxiliary hairs d2 and e2 are formed between the front and rear wing hairs b9 and b10, c9 and c10.

The sixth toothbrush hair 16 is configured as a front wing hair b11 and a rear wing hair b12 are arranged in series in a V-shape in one side of the central hair a6, and a front wing hair c11 and a rear wing hair c12 are formed in series in a V-shape in the opposite side, which are arranged in a X-shape with respect to the central hair a6.

The first through third toothbrush hairs 11, 12 and 13 among the first through sixth toothbrush hairs 11, 12, 13, 14, 15 and 16 belong to the front part 1, and the fourth through sixth toothbrush hairs 14,15 and 16 belong to the rear part 11.

The central hairs a1, a2, a3, a4, a5 and a6 form a cross shape. As shown in FIG. 5, the central portions are formed in a conically protruded shape with the central portion being configured to have a height 1-2 mm higher than the height of the normal toothbrush hairs.

The construction that six central hairs a1, a2, a3, a4, a5 and a6 are provided in a cross shape with their central portion being formed in conical shapes is provided for enhancing an adaptation with a mesial pit, a central pit and a distal pit, which correspond to a dental caries portion and are positioned in the center portions of a mesial fossa, a central fossa, and a distal fossa of the occlusal aspect of the maxillomandibular molars. The above construction might be adapted to a buccal groove which corresponds to a dental caries frequent area of a buccal aspect of the mandibular molars.

In the above construction, the first through sixth toothbrush hairs 11, 12, 13, 14, 15 and 16 might be configured as each wing hair b1 and c2, b2 and c1, b3 and c4, b4 and c3, b5 and c6, b6 and c5, b7 and c8, b8 and c7, b9 and c10, b10 and c9, b11 and c12, and b12 and c11 is formed in a straight line shape or is formed in a curve shape as shown in FIGS. 9 and 10. Since each wing hair b1 and b2, b3 and b4, b5 and b6, b7 and b8, b9 and b10 and b11 and b12 and each wing hair c1 and c2, c3 and c4, c5 and c6, c7 and c8, c9 and c10 and c11 and c12 might be formed in a V-shape matching with each accessory groove and each triangular groove of the occlusal aspect of the molar, they are preferably formed in a straight line shape or a curve shape.

As shown in FIG. 3, the second toothbrush hair 12 of the front part 1 is configured with the rear wing hairs b4 and c4 being higher in their both sides, and with the centers being asymmetrically lower.

The central hair a2 is protruded from the center, and front auxiliary hairs d1 and e1 are formed both sides of the center hair a2.

The front auxiliary hairs d1 and e1 are protruded in a rectangular shape and are protruded with the same height as the central hairs a1, a2 and a3 for thereby effectively brushing the buccal groove of the buccal aspect of the maxillomandibular molars.

In addition, when brushing in the up and down directions with respect to the buccal aspect of the maxillomandibular molars, it is possible to enhance cleanness of the buccal groove of the buccal aspect with the helps of the protruded portions of the central hairs a1, a2 and a3.

The first and third toothbrush hairs 11 and 13 of the front part I are formed in the same configuration as the second toothbrush hair 12 except for their widths.

The first through third toothbrush hairs 11, 12 and 13 are configured with their both sides being higher than the center and are configured in an asymmetrical shape with respect to a ½ portion in one direction depending in the central axis.

As shown in FIG. 6, in case that the length of crown is 7.5 mm, the width from the height of contour of the buccal aspect to the cusp tip of the buccal aspect is 3.5 mm, the width from the height of contour of the buccal aspect to the cervical line of the buccal aspect is 0.75 mm, since the straight distance from the cervical line of the buccal aspect to the cusp tip of the buccal aspect is 8 mm, the whole width of the second toothbrush hair 12 is set 8 mm, and it looks like a dome shape when viewing the outer appearance of the buccal aspect from the mesial aspect of the mandibular first molar. Since the curve of the buccal aspect is an asymmetrical curve with respect to a ½ portion in one direction with based on the central axis, the first through third toothbrush hairs 11, 12 and 13 are matched with the curve surface of the buccal aspect, so an asymmetrical curve is obtained.

As shown in FIG. 6, in case of the molar, when the standard length of the crown is 7.5 mm, the straight distance from the cervical line of the buccal aspect to the cusp tip of the buccal aspect is 8 mm, the whole width of each second toothbrush hair 12 is 8 mm. Since the curve surface of the buccal aspect is an asymmetrical curve surface with respect to a ½ portion in one direction, an asymmetrical curve is assumed so as to match the first through third toothbrush hairs 11, 12 and 13 with the curve surface of the buccal aspect.

In the above construction, since the buccal aspect of the molar is formed in an asymmetrical curve including the cervical third (⅓), which is the height of contour, the first through third toothbrush hairs 11, 12 and 13 are formed in an asymmetrical curve in a ½ portion in one direction with respect to the central axis.

As shown in FIG. 4, the fifth toothbrush hair 15 of the rear part II is configured as the front wing hairs b9 and c9 are horizontal in their both sides and are narrowed following a sharp inclination to reach about 2.3 mm in the buccal and lingual developmental grooves in a ⅓ portion (central fossa) of the lengths of the auxiliary hairs d2 and e2 of the rear part and then form an inclined portion sharp toward the center of the central fossa while forming a line which connects the ends of toothbrush hairs.

The central hair a5 is protruded from the center, and the auxiliary hairs d2 and e2 of the rear part are formed in both sides of the central hair a5.

The fourth and sixth toothbrush hairs 14 and 16 of the rear part 11 are formed in the same shape as the fifth toothbrush hair 15 except for the difference in width.

In the above construction, the auxiliary hairs d2 and e2 of the rear part are lowered in their heights with an inclination in both sides from the 1-2 mm point of the lower side in the tops of the central hairs a4, a5 and a6. The auxiliary hairs d2 and e2 of the rear part are configured for an effective tooth brushing work with respect to the buccal and lingual grooves of the occlusal aspect of the maxillomandibular molars.

In the above construction, when brushing the teeth with the auxiliary hairs d2 and e2 of the rear part in the forward and backward directions with the head 10, it is possible to enhance an adaptation with respect to the buccal and lingual developmental grooves of the occlusal aspect along with reliable cleanness. In addition, when brushing in the left and right directions, it is possible to enhance an adaptation with respect to the buccal and lingual developmental grooves of the occlusal aspect.

The heights of the auxiliary hairs d2 and e2 of the rear part are lowered with a certain inclination in both sides with respect to the 1-2 mm point of the lower side from the top of the central hair a5 for thereby well being matched with the buccal and lingual developmental grooves which are raised with an inclination in the directions of the buccal and lingual aspects from the central fossa of the actual teeth.

In the above construction, the first through six toothbrush hairs 11, 12, 13, 14, 15 and 16 might be formed of plate bodies or rubber plate bodies or might if necessary be formed of the groups of hairs.

As shown in FIGS. 11 and 12, a barrier wall 18 formed of a plastic or rubber material is formed between the toothbrush hairs 11, 12, 13, 14, 15 and 16 of the head 10, and a toothbrush brand might be formed therein.

The barrier wall 18 has a height of about 3 mm from the surface of the head for thereby preventing the inclination of the toothbrush hairs 11, 12, 13, 14, 15 and 16 for thereby effectively preventing the inclination of the same.

As shown in FIGS. 13 and 14, a dome shaped first cushion layer 19 is formed on the upper side of the head 10, and a second cushion layer 19a formed in a band shape might be further formed on the upper side of the first cushion layer 19. The first cushion layer 19 is preferably formed of a soft rubber, and the second cushion layer 19a is preferably formed of a very soft rubber.

In the above construction, the second cushion layer 19a is made of a rubber softer than that of the first cushion layer 19 for minimizing uneasy feeling with respect to a mucous membrane of an inner side of the soft cheek.

The first and second cushion layers 19 and 19a are configured to reduce the pains of users who suffer from a temporomandibular disorder in the muscle due to a mental stress, while helping the facial muscle fatigue recovery of the users who work using facial muscles.

In the above constructions according to the present invention, the first through third toothbrush hairs 11, 12 and 13 of the front part I and the fourth through sixth toothbrush hairs 14, 15 and 16 of the rear part II can be used for effectively brushing the occlusal aspect and buccal aspect of the maxillomandibular molars for thereby preventing dental caries and reliably removing the food debris between the teeth and gum.

Since a barrier wall 18 is formed between the toothbrush hairs 11, 12, 13, 14, 15 and 16, it is possible to form a brand of a toothbrush, and it is possible to prevent an inclination of the toothbrush hairs.

Since the first and second cushion layers 19 and 19a are protruded from the upper side of the head 10, a cheek massage function can be performed. In addition, it is possible to obtain a pain reduction of temporomandibular by prompting the removal of pain substance and wastes by massaging the muscles stressed by over mental stress with the helps of a tooth brushing work and a cheek massaging and stretching function with respect to the patients who suffer from temporomandibular. When the present invention is adapted to a user who needs a lot of conversation with others (for example, teacher), it is possible to help recover the facial muscle fatigues due to a facial muscle extension effect during tooth brushing.

The first through sixth toothbrush hairs 11, 12, 13, 14, 15 and 16 are formed in the head 10 of the present invention is a V shape or a X shape, and the central hairs a1, a2, a3, a4, a5 and a6 are formed in the centers of the toothbrush hairs 11, 12, 13, 14, 15 and 16. Here, the central hairs a1, a2, a3, a4, a5 and a6 are marched with six fossas of the occlusal aspect of the maxillomandibular first and second molars, respectively.

So, it is possible to more cleanly brush the mesial fossa (mesial pit), central fossa (central pit) and distal fossa (distal pit) with the helps of the central hairs a1, a2, a3, a4, a5 and a6. In addition, it is possible to more cleanly brush the buccal developmental groove, lingual developmental groove, accessory groove, triangular groove and buccal groove of the buccal aspect with the helps of the front and rear wing hairs and auxiliary hairs of each toothbrush hair.

The wing hairs b1 and b2, b3 and b4, b5 and b6, c1 and c2, c3 and c4, and c5 and c6 of the front part I allow the wider contact surface area of the buccal aspect of the maxillomandibular molars.

The widths of the wing hairs b2 and b3, b4 and b5, c2 and c3, and c4 and c5 are below 2 mm, so it is possible to more reliably brush the interproximal space which has a lot of food debris accumulation.

As shown in FIGS. 7 and 8, the wing hairs b2 and b3, b4 and b5, c2 and c3, and c4 and c5 are configured to more effectively brush the contact area between the teeth. When it is adapted to the buccal aspect of the maxillomandibular molars, the interproximal space (space portion between teeth) of the lower side of the contact area of the buccal aspect of the maxillomandibular first and second molars is configured based on the distance from the cervical line (boundary of crown and tooth root) to the cervical line of the neighboring teeth. The width of the space between the maxillary first molar and the maxillary second molar is 2.0 mm, and the width of the space between the mandibular first molar and the mandibular second molar is 2.2 mm.

Since the cervical line is covered by gum, the width of the interproximal space of the low side of the contact area of buccal aspect of molars corresponds to the width of the gingival line (boundary of crown and gum) between neighboring teeth, and the width of the gingival line between the neighboring teeth is narrower than the cervical line. The width of the space between the teeth is getting narrower in the upward direction. When the width of each wing hair b2 and b3, b4 and b5, c2 and c3, and c4 and c5 are below 2 mm, wing hairs with interval being below 2 mm might be efficiently used for thereby enhancing a cleanness in space between the teeth having a lot of food debris. So, it is possible to more effectively brush the contact area of the buccal aspect in which the food impaction occurs.

The wing hairs b2 and c2 allow a more effective brushing operation with respect to the rear most portion (distal aspect) of the maxillomandibular molars.

The wing hairs b7 through b12 and c7 through c12 of the rear part 11 is configured as the accessory groove and the triangular groove extended from the mesial fossa, the central fossa, and the distal fossa to the buccal direction and the lingual direction of the occlusal aspect are formed in a V shape, so it is possible to more effectively brush the occlusal aspect of the maxillomandibular molars along with an advantage that approaching is easier than a conventional toothbrush.

For example, when brushing the teeth in the forward direction, it is possible to effectively brush the accessory groove in the mesial slope of the cusp and the distal triangular groove of the occlusal aspect with the helps of the front wing hairs b7, b9, b11 and c7, c9, c11. When brushing the teeth in the backward direction, it is possible to more effectively brush the accessory groove in the distal slope of the cusp and the mesial triangular groove of the occlusal aspect with the helps of the rear wing hairs b8, b10, b12 and c8, c10, c12. Brushing the teeth in the left and right directions is effective as well.

In the above operation, the portions between the wing hairs b3 and b4, c3 and c4, b9 and b10 and c9 and c10 are widened to form a V shape, so the width between the accessory grooves extend from the central fossa is wider than the width between the accessory groove and triangular groove extend from mesial and distal fossa, whereby it is possible to obtain a wider angle depending on the widths of the accessory groove of the occlusal aspect of the maxillomandibular molars of the actual natural teeth.

The front and rear auxiliary hairs d1 and e1, d2 and e2 are formed between the wing hairs b3 and b4, c3 and c4, b9 and b10, and c9 and c10, so the front auxiliary hairs d1 and e1 are applied to the buccal groove of the buccal aspect along with the central hair a2 when brushing the buccal aspect of the maxillomandibular molars with respect to the head 10 in the left and right directions for thereby enhancing cleanness. The rear auxiliary hairs d2 and e2 are applied to the buccal developmental groove and lingual developmental groove of the occlusal aspect when brushing the occlusal aspect of the maxillomandibular molars with respect to the head 10 in the forward and backward directions or in the left and right directions for thereby enhancing cleanness.

In the above operation, the auxiliary hairs d1 and e1 of the front part have the same heights as the central hair a2, and the auxiliary hairs d2 and e2 of the rear part are configured with their heights being lowered with an inclination with respect to the lower 1-2 mm portion from the top of the central hair a5.

In other words, as shown in FIG. 6, the front part I of the head 10 is formed of an asymmetrical curve connecting the end lines of the toothbrush hair with respect to an outer look of the length of the crown from the cervical area of the buccal aspect of the mandibular first molar to the buccal cusp tip. So, when brushing the teeth, an ideal adaptation can be obtained with respect to the buccal aspect of the maxillomandibular molars. It is possible to effectively brush the buccal aspect of the maxillomandibular molars and the gum boundaries (gingival line).

For reference, when adapting to the buccal aspect of the mandibular first molar using the curve which connects the ends of the toothbrush hairs with respect to the buccal aspect of the maxillary first molar, the maxillary first molar is has a more straight buccal aspect curve (contour) as compared to the mandibular first molar, so it has a poor adaptation to the buccal aspect of the mandibular molar, and a cervical area adaptation is degraded. The reason that the maxillary first molar has a more straight buccal aspect curve as compared to the mandibular first molar because the lengths of the crowns of the maxillomandibular molars are same as 7.5 mm But the width from the height of contour of the buccal aspect of the mandibular first molar to the cusp tip of the buccal aspect is 3.5 mm, but the maxillary first molar is 2.2 mm. The width from the height of contour of the buccal aspect of the mandibular first molar to the cervical line of the buccal aspect of the mandibular first molar is 0.75 mm, but the maxillary first molar is 0.5 mm In addition, the straight distance from the cervical line of the buccal aspect of the mandibular first molar to the cusp tip of the buccal aspect is 8 mm, but the maxillary first molar is 7.7-7.8 mm.

In addition, the mandibular first molar has an internal upward inclination, whereas the maxillary first molar is an external downward inclination.

In the rear part 11, the accessory groove connected from the mesial fossa, central fossa and distal fossa to the cusps in the occlusal aspect of the maxillomandibular molars of an actual natural tooth, and the triangular groove connected from the mesial fossa and distal fossa to the mesiodistal marginal ridges are connected in part up to about ⅓ of the width of the buccal and lingual developmental groove like the connecting buccal developmental groove and lingual developmental groove or accessory groove or are neighboring very closely, and then are formed at the same height as the auxiliary hairs d2 and e2 of the rear part till about ⅓ of the length of the auxiliary hairs d2 and e2 of the rear part with respect to the lower 1-2 mm point from the top of the central hair a5. In addition, they are downwardly widened depending on the depth (1.5 mm) and the width (5 mm) of the intercuspital space and are formed horizontally after escaping from the depth and width of the intercuspital space (depending on the shape that accessory grooves and the mesiodistal triangular grooves are upwardly connected), so that it is possible to more effectively brush the accessory groove and triangular groove of the occlusal aspect of the maxillomandibular molars of an actual natural tooth.

The front part I has a width of 8 mm with respect to the width of the toothbrush hair in the left and right directions about the head 10. Here, the width of 8 mm is set so as to be adapted to the straight distance from the cervical line of the buccal aspect of the mandibular first molar to the cusp tip of the buccal aspect.

The rear part II is configured as the toothbrush has a width of 9 mm in the left and right directions with respect to the head 10. The width of 9 mm is preferably set as 2 mm are added by 1 mm, twice, which is the width of the cusp of the buccal and lingual cusps, to 5 mm of the distance between the buccal and lingual cusps of the occlusal aspect of the maxillomandibular molars, and then 2 mm are further added by 1 mm, twice, to the same in consideration of the widened width of the buccal and lingual cusps as the cusp tip occurs due to mastication operation.

The rear part II might be well adapted to all types of occlusal aspect from a young age to an old age.

The lengths of all the toothbrush hairs of the front and rear parts I and II are set 1.7 cm. The above length is set as the width of 1 mm of the mesial marginal ridge of the occlusal aspect of the maxillary first molar and the distal marginal ridge of the occlusal aspect of the maxillary second molar is subtracted from the value obtained by adding 0.9 mm of the mesiodistal diameter of crown of the maxillary second molar to 10 mm of the mesiodistal diameter of crown of the maxillary first molar.

In addition, a more reliable toothbrush brushing contact with the surfaces of teeth can be implemented by adapting the value, which is obtained by subtracting the widths of the mesial marginal ridge of the occlusal aspect of the mandibular first molar and the distal marginal ridge of the occlusal aspect of the mandibular second molar from the value obtained by adding the mesiodistal diameter of crown (11.0 mm) of the mandibular first molar and the mesiodistal diameter of crown (10.5 mm) of the mandibular second molar adapting to the relatively shorter lengths of the maxillary molars rather than adapting to the relatively longer lengths of the mandibular molars when determining the lengths of the toothbrush hairs, because as the toothbrush is repeatedly used, it is worn out and widened, so it is preferred to have the length of 1.7 mm which is proper for brushing the maxillary first and second molars.

It is preferred that the distances between the central hairs a1, a2, a3, a4, a5 and a6 is 2 mm, respectively. Since the distance is matched with the distance from the mesial fossa to the central fossa of the occlusal aspect of the maxillomandibular molars of an actual natural tooth, and the distance from the central fossa to the distal fossa, a clean tooth brushing can be possible with the helps of an ideal approach.

As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described examples are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A toothbrush comprising first and sixth toothbrush hairs that are arranged in parallel in the forward and backward directions with their wing hairs being formed in an X shape with respect to a central hair.

2. The toothbrush of claim 1, wherein said first and sixth toothbrush hairs are configured with each wing hair being formed straight.

3. The toothbrush of claim 1, wherein said first and sixth toothbrush hairs are configured with each wing hair being widened in an outward direction as being formed in a curve shape.

4. The toothbrush of claim 1, wherein said central hair of each wing hair is protruded by 1-2 mm while being formed in a cross shape with its center being formed in a conical shape.

5. The toothbrush of claim 4, wherein said central hair of each wing hair is protruded by 1-2 mm while being formed in a circular shape with its center being formed in a conical shape.

6. The toothbrush of claim 4, wherein said central hairs are arranged at an interval of 2 mm, respectively.

7. The toothbrush of claim 1, wherein the length from a wing hair of a front part of the first toothbrush hair to a wing hair of a rear part of the sixth toothbrush hair is 1.7 cm.

8. The toothbrush of claim 1, wherein said neighboring wing hairs are formed in a diamond shape with their intervals being less than 2 mm.

9. The toothbrush of claim 1, wherein a width between the wing hairs of the front and rear parts of the second and fifth toothbrush hairs is wider than the width of the wing hairs of the front and rear parts of the neighboring toothbrush hairs.

10. The toothbrush of claim 1, wherein said fourth through sixth toothbrush hairs form a line connecting the ends of toothbrush hairs and are configured with their both ends being horizontal and being narrowed with a high inclination to reach a ⅓ portion of the length from a central fossa to buccal and lingual developmental grooves and being sharply inclined toward the center of the central fossa.

11. The toothbrush of claim 1, wherein said first through third toothbrush hairs are configured with their both ends being higher than the center portion in an asymmetrical curve with respect to a ½ portion in one direction based on a central axis.

12. The toothbrush of claim 1, wherein an auxiliary hair of the front part is formed between the wing hairs of the front and rear parts of the second toothbrush hair.

13. The toothbrush of claim 12, wherein said auxiliary hair of the front part has the same height and width as the central portion of the central hair and are spaced apart as much as the width of the central portion of the central hair.

14. The toothbrush of claim 1, wherein an auxiliary hair of the rear part is formed between the wing hairs of the front and rear parts of the fifth toothbrush hair.

15. The toothbrush of claim 14, wherein said auxiliary hair of the rear part is configured with its height being lowered in an outward direction.

16. The toothbrush of claim 1, wherein a barrier wall is protruded between the toothbrush hairs for preventing an inclination of the toothbrush hairs.

17. The toothbrush of claim 1, wherein said toothbrush hair is formed of a plate body.

18. The toothbrush of claim 17, wherein said plate body is formed of rubber or a group of hairs.

19. A toothbrush, comprising:

a first cushion layer which is formed on an upper side of a toothbrush head in a dome shape; and

a second cushion layer which is formed on an upper side of the first cushion layer in a band shape and is made of a certain material softer than that of the first cushion layer.