JP6906115B1 - Free end denture and its mounting attachment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a free end denture and its attachment attachment which give an excellent wearing feeling and a comfortable biting feeling during a meal to a denture wearer. SOLUTION: In a free end denture and its attachment attachment, a substantially spherical protrusion 500 attached to a predetermined position on a side surface of a metal crown to be placed on the crown and a denture base 150 of the free end denture 100 are provided at one end. The abutment tooth 50 is composed of a substantially spherical protruding portion capturing engaging means 200 provided with a substantially cylindrical comb-toothed spherical protruding engaging capturing portion 300 having a plurality of elastic claw members 301 to 10 extendingly formed therein, and the abutment tooth 50 is a metal crown. 51 is attached to the crown 52, and the free-end denture has a denture body and a substantially cylindrical comb-toothed spherical protruding engagement catching portion provided therein, and a substantially cylindrical comb-tooth shape provided in a part thereof. Spherical protruding engagement Depending on the degree of elastic deformation of the capturing portion 300, at least a part of the periphery of the substantially spherical protruding portion of the metal crown can be engaged or disengaged. [Selection diagram] Fig. 1

Description

The present invention relates to a type of denture in which one end of a free-end denture is detachably attached to one abutment tooth and an attachment thereof.

A mounting attachment made of a magnetic material is provided on one abutment tooth, a magnet that exerts a tensile force on this magnetic material is provided on the base end side, and the denture is detachably attached to the abutment tooth by the magnetic pulling force of both. The free end denture to be used has been conventionally known (see, for example, Patent Document 1).

The free-end denture described in Patent Document 1 has an L-shaped keeper attached to the surface of the metal crown of the abutment tooth as shown in FIGS. 6 and 8, and a hemispherical shape provided on the protruding portion of the L-shaped keeper. A hemispherical keeper surface engaging protrusion and a hemisphere on the keeper surface that engage with the recess provided on one end side of the free end denture and the opposite surface of the L-shaped keeper facing the recess. A magnet unit is disclosed that includes a hemispherical recess that engages with a portion that faces the recess and has a magnet sandwiched between the two. The magnet unit is provided on the surface of the denture adjacent to the abutment tooth, and the L-shaped keeper and the magnet unit are pressed against each other for latch engagement, or the free end denture is pulled from the abutment tooth to release the latch engagement. The free end denture can be attached to and detached from the abutment tooth.

A more specific configuration of Patent Document 1 will be described in detail below. The following configurations are disclosed in column 4, lines 20 to 40 and FIG. 6 of Patent Document 1.

Specifically, the L-shaped keeper 25 is provided on the surface of the metal crown 30, and the magnet unit 35 is attached to a removable denture. The keeper 25 has a hemispherical recessed portion 42, a hemispherically protruding keeper surface 43, and an occlusal stopper 45. The magnet unit 35 has a magnet 36, a pole end 48 projecting hemispherically on the upper side, and a pole member 50 hemispherically recessed on the lower side.

Then, the occlusal force O shown in FIG. 8 can move the magnet unit so as to rotate by a small angle around the hinge axis H until the occlusal stopper 45 contacts the upper pole end 48 and prevents further movement. .. By having such an arrangement, it is possible to prevent annoying phenomena such as hitting back and jumping up while the quotient force is acting. It is disclosed that the entire denture returns to the original position up to the position shown in FIG. 6 when the quotient force O is no longer applied.

U.S. Pat. No. 4,508,507

In order to reduce the burden on the digestive organs after finely chewing and swallowing food, at the time of occlusion, it should be about 3 MPa to about 9 MPa (average 30 kg to 90 kg per ^{1 cm 2} (300 tons to 900 tons per ^{1 m 2)).} An extremely large occlusal force acts between the upper and lower teeth.

Therefore, since such a large occlusal force acts every time during occlusal, the above-mentioned occlusal is applied to the denture described in Patent Document 1 introduced as the prior art, the abutment tooth to which the denture is attached, and the connecting portion thereof. The force will be applied countless times after the denture is attached.

Therefore, in the feasible actual dimensions of the components of the connection with the abutment tooth of the prior art denture, these components may quickly separate from each other and fall apart after a short period of occlusion. , There is a very high risk that each component itself will break and become a fine foreign substance and be swallowed with food.

The reason for this will be described in more detail below. From the contents disclosed in Patent Document 1, the dimensions of each component having the structure can be inevitably clarified. The reason is as follows.

The size of the abutment tooth on which the denture is attached and the denture itself are approximately constant. For example, in the case of a premolar, the width is generally 8 mm to 9 mm. Therefore, if the configuration disclosed in the above-mentioned prior art is to be applied to the premolar, the keeper in FIG. 6 of Patent Document 1 as the prior art The vertical dimension of the portion of 25 extending in the horizontal direction in the drawing is about 1.76 mm, the diameter of the curved portion of the keeper 25 is 0.5 mm, and the portion is opposite to the pole member 50 via the pole member 50 and the magnet 36. The vertical dimension in the figure of a member equivalent to the pole member 50 which is arranged and has a hemispherical pole end at the end is about 0.8 mm.

As is clear from these facts, each component of the connecting portion of the denture described in the prior art, which is a prior art, has a very small dimension and is made of a material such as a metal or a resin having considerable strength. Even if you use, it is clear that if even a small amount of force is applied, each component will peel off or each component itself will be damaged and fall apart.

An object of the present invention is that the denture can be easily attached to and detached from the denture, and the occlusal force constantly applied to the denture during meals does not adversely affect the joint portion with the abutment tooth to which the denture is connected. It is an object of the present invention to provide a free end denture and its attachment attachment that can provide a comfortable fit and a comfortable bite.

In order to solve the above-mentioned problems, the free end denture and its attachment attachment according to claim 1 of the present invention are used.
In a free end denture that can be attached to and detached from one abutment tooth and its attachment
The attachment has a substantially spherical protrusion attached to a predetermined position on the side surface of a metal crown to be placed on the crown, and a substantially spherical protrusion provided on the denture base of the free-end denture and having a substantially cylindrical comb-shaped spherical protrusion engagement catching portion. It consists of a part catching engagement means
The abutment tooth is configured with the metal crown attached to the crown.
The free-end denture has a denture body and the substantially spherical protrusion catching / engaging means provided on the denture body, and forms a part of the substantially spherical protrusion catching / engaging means. The combined capture portion is attached to one end side of the denture body close to the abutment tooth, and is provided on a part thereof depending on the degree of elastic deformation of the substantially cylindrical comb-shaped spherical protrusion engagement capture portion. by releasing the or engage engagement while capturing at least a portion of the periphery of the substantially spherical protrusions of metallic crowns, Yu allow detachable with respect to the abutment of the free end denture Hanaretan a denture and its mounting attachment,
The substantially cylindrical comb-shaped spherical protrusion engagement capture portion forming a part of the substantially spherical protrusion capture engagement means is the entire substantially spherical protrusion when viewed with the free end denture attached to the abutment tooth. It has a plurality of elastic claw members extending in a direction substantially orthogonal to the axial direction of the abutment tooth so as to elastically engage with at least a part of the circumference.
The length of the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion is a virtual continuous line connecting adjacent tip portions of each elastic claw member when viewed from a direction substantially orthogonal to the extending direction of the elastic claw member. The shafts are arranged so as to form a substantially elliptical shape so as to be substantially parallel to the extending direction of the axis of the abutment tooth.
In addition to the case where the denture is not occluded while the denture is attached, at least a part of the plurality of elastic nail members is substantially spherical of the abutment tooth depending on the degree of occlusal. By continuing to capture and engage the protruding portion, the base end portion of each elastic claw member is with the abutment tooth of the free end denture so as to maintain the mounted state of the free end denture on the abutment tooth. It extends from the opposite side and is formed.
In the plurality of elastic claw members, when viewed from a direction substantially orthogonal to the direction in which they extend, a virtual continuous line connecting adjacent tip portions of the elastic claw members is near the maximum diameter of the substantially spherical protrusion. It is characterized in that the base end portion of each elastic nail member is formed extending from the side of the free end prosthesis facing the abutment tooth so as to match the shape of the above.

Further, the free end denture and its attachment attachment according to claim 2 of the present invention are the free end denture and its attachment attachment according to claim 1 .
The tip of each elastic claw member projects in a direction toward the elastic claw member extending so as to face each other, and the attachment / detachment assistance / attachment / maintenance that promotes the maintenance of the attachment state of the free end denture with respect to the abutment tooth and the attachment / detachment of the free end denture It is characterized by having a tapered protrusion for promotion.

Further, the denture according to claim 3 of the present invention is the free end denture according to claim 1 or 2 and its attachment.
While the substantially spherical protrusion capturing and engaging means is made of a non-magnetic material, at least the substantially spherical protrusion of the attachment is made of a magnetic material.
When the free end denture is attached to the abutment tooth, the position inside the free end denture in the longitudinal direction adjacent to the substantially cylindrical comb-shaped spherical protrusion capturing engagement portion is the substantially spherical shape. A magnet is placed on the opposite side of the protrusion,
The magnet is characterized in that at least a substantially spherical protrusion made of the magnetic material is subjected to a magnetic tensile force sufficient to help maintain the mounted state of the free end denture on the abutment tooth.

The free end denture and its attachment attachment according to claim 4 of the present invention are the free end denture and its attachment attachment according to any one of claims 1 to 3.
Instead of the metal crown, the substantially spherical protrusion is provided at a predetermined position, and the abutment tooth upper body portion is provided so as to form an abutment tooth by attaching to the residual root portion.

The free end denture and its attachment attachment according to claim 5 of the present invention are the free end denture and its attachment attachment according to any one of claims 1 to 4.
Instead of the metal crown, the substantially spherical protrusion is provided at a predetermined position, and the abutment tooth has an upper main body portion which is attached to the implant to form an abutment tooth.

Further, the mounting attachment according to claim 6 of the present invention is:
A mounting attachment according to any one of claims 1 to for detachably attaching the free end denture according to claim 5 to claim 1 to claim 5.

Further, the free end denture according to claim 7 of the present invention is
The free end denture according to any one of claims 1 to claims 1 for detachably attaching the abutment provided with a mounting attachment according to any one of claims 5 5.

According to the present invention, the denture can be easily attached and detached, and the occlusal force constantly applied to the denture during meals does not adversely affect the joint portion with the abutment tooth that connects the denture, and the denture wearer has an excellent wearing feeling. It is possible to provide a free end denture capable of providing a comfortable bite and an attachment thereof.

It is a schematic side view which shows the state which attached the free-end denture which concerns on this invention to an abutment tooth by a partial cross section. It is a schematic plan view which shows the state which attached the free-end denture which concerns on this invention to an abutment tooth by a partial cross section. It is a schematic perspective view which shows a plurality of elastic claw members of the substantially cylindrical comb-toothed spherical protrusion capture engagement portion provided in the substantially spherical protrusion capture engagement means together with the substantially spherical protrusion provided on the metal crown. It is a schematic side view which shows the relative positional relationship between a free end denture and an abutment tooth at the time of starting occlusion from the denture wearing state shown in FIG. 1 in a partial cross section. FIG. 5 is a schematic side view showing a partial cross-sectional view of the relative positional relationship between the free end denture and the abutment tooth when occluded with a normal occlusal force following the state shown in FIG. FIG. 5 is a schematic side view showing a partial cross-sectional view of the relative positional relationship between the free end denture and the abutment tooth in a state of being more strongly occluded from the state shown in FIG. It is a schematic side view which shows the state immediately before attaching a free end denture to an abutment tooth, and the state immediately after removing it with a partial cross section. The side view (right side) and the end face of the substantially spherical protrusions provided in the substantially spherical protrusion capture engagement means are slightly separated from the tips of the elastic claw members constituting the substantially cylindrical comb-shaped spherical protrusion engagement capture portion. Explanatory drawing (FIG. 8 (a)) shown visually (left side), and the elastic claws in the middle and lower side of the substantially cylindrical comb-shaped spherical engagement capture portion provided with the substantially spherical protrusion capture engagement means. It is explanatory drawing (FIG. 8 (b)) which shows the state of being in contact with the tip of a member in a side view (right side) and an end side view (left side). Following the state shown in FIG. 8B, the substantially spherical protrusion is pressed against the tip of the elastic claw member of the substantially cylindrical comb-toothed spherical engagement capture portion provided in the substantially spherical protrusion capture / engagement means, and the middle and the middle and Explanatory view (FIG. 9 (c)) showing the state in which the lower elastic claw member (only the lowermost one in the drawing is typically shown) is bent in a side view (right side) and an end view (left side). ), And from the state shown in FIG. 9 (c), a substantially spherical protrusion connects the tips of the elastic claw members constituting the substantially cylindrical comb-toothed spherical protrusion engagement capture portion provided in the substantially spherical protrusion capture engagement means. Explanatory view (FIG. 9 (d)) showing a state in which a free end prosthesis is attached to an abutment tooth by engaging with an elliptical space in end face view formed by continuous lines in side view (right side) and end face view (left side). ). A substantially spherical protrusion and a substantially spherical protrusion capture engagement means provided in a substantially spherical protrusion capture engagement means in a state where occlusion is started after the free end prosthesis shown in FIG. 9D is attached to the abutment tooth. Explanatory views (FIG. 10 (e)) and FIGS. 10 (FIG. 10 (e)) showing changes in the relative positional relationship of each elastic claw member constituting the cylindrical comb-toothed spherical occlusal capture portion in a side view (right side) and an end face view (left side). A substantially spherical protrusion and a substantially spherical protrusion capture engagement means when occluded with a normal occlusal force from the state shown in e). The change in the relative positional relationship of each of the constituent elastic claw members is further strengthened from the explanatory view (FIG. 10 (f)) shown in the side view (right side) and the end view (left side), and the state shown in FIG. 10 (f). Approximately spherical protrusion when occluded and approximately spherical protrusion capture Engagement means Approximately spherical protrusion capture Engagement means provided with substantially cylindrical comb-toothed spherical engagement capture portion Change in relative positional relationship of each elastic claw member Is an explanatory view (FIG. 10 (g)) showing side view (right side) and end face view (left side). Explanatory drawing (FIG. 11 (1)) showing the state before and after occlusion when the contact surface of the denture base with the mucous membrane of the jawbone is flat, and the part of the denture base with the mucous membrane of the jawbone. Regarding the contact surface, one side of the denture bone corresponding to the width direction of the denture base (right side in the figure) is convex, so that one side of the denture bone corresponding to the width direction of the denture base of the mucous membrane (Fig.) Explanatory drawing (FIG. 11 (2)) showing the state before and after occlusal when the middle right side) is convex, in the width direction of the denture base with respect to the contact surface of the denture base with the mucous membrane of the jawbone where it sinks into the mucous membrane. Since the other side of the denture (left side in the figure) corresponding to is convex, the explanatory view showing the state before and after occlusion when the other side of the mucous membrane (left side in the figure) is convex accordingly. (Fig. 11 (3)). Corresponds to FIG. 1 showing a state in which a free-end denture having a magnet for maintaining a secure mounting state of the denture on the abutment tooth is attached to the abutment tooth in addition to the substantially spherical protrusion capturing and engaging means. It is a schematic side view.

Hereinafter, embodiments of the free-end denture and its attachment attachment according to the present invention and modified examples thereof will be described with reference to the drawings. In the following description, a schematic explanatory drawing will be created in the case where the free end denture and its attachment attachment according to the present invention are applied to the abutment tooth in the form of covering the crown with a metal crown for attachment / detachment and occlusion. The explanation will be given accordingly. However, as will be described later, it is also possible to apply the present invention to a single abutment tooth formed by utilizing an implant or a residual root.

In addition, the upward, downward, and horizontal directions in the drawings and sentences are defined based on the mode in which the implementation is mounted in such a form. In addition, the explanations in the following sentences and how to draw drawings are merely examples of the scope to which the present invention belongs, and various shapes and dimensions are provided as long as the effects of the present invention can be exhibited. , Size and material can be changed as appropriate.

In addition, the arrangement relationship and dimensional relationship between each component of the drawing, the presence or absence of gaps, etc. are slightly exaggerated in order to facilitate understanding of the invention, and are drawn with dimensional relationships different from the actual ones. Specifically, for example, the thickness of the mucous membrane in each drawing is larger than the actual size in order to facilitate understanding of the invention as compared with the crown, root, periodontal ligament, and metal crown constituting the abutment tooth. Is also exaggerated. Similarly, the relative positional relationships with the crown, root, periodontal ligament, metal crown and mucous membrane are shown schematically, unlike the actual dimensional relationship and positional relationship, in order to facilitate understanding of the invention.

From the above, when applying the free-end denture and its attachment attachment according to the present invention to actual denture medical treatment, the present invention may be changed to a preferable form depending on the mounting position, mounting site, and number of artificial teeth for each denture wearer. It is natural to modify the invention according to various actual dental treatments, and it should be stated in advance that such various variations are also included in the scope of the present invention. Further, in the drawings, cross-section hatching is omitted as appropriate to facilitate understanding of the explanation.

Further, with respect to each component of each embodiment and its modified example, the equivalent component will be described with the same reference numerals even if there is a slight difference in shape or the like.

The free-end denture and its attachment attachment according to the present invention include a denture having an elongated denture base in which artificial teeth such as premolars and molars are fixed to the upper part, and an attachment for attaching the denture to an abutment tooth. Free end denture and its attachment.

In the present invention, artificial teeth such as premolars and molars are provided on the upper part of the denture base of the free end denture. In the present invention, the types, number, and arrangement of premolars and molars provided in the denture base can be variously combined within the range in which the effects of the present invention can be exhibited, and the site and support for mounting the denture. It can be appropriately selected according to the condition of the missing tooth around the molar.

FIG. 1 is a schematic side view showing a state in which a free-end denture according to an embodiment of the present invention is attached to an abutment tooth in a partial cross section. Further, FIG. 2 is a schematic plan view showing a state in which the free end denture according to the embodiment of the present invention is attached to the abutment tooth in a partial cross section. Further, FIG. 3 is a schematic perspective view showing a plurality of elastic claw members of a substantially cylindrical comb-shaped spherical protrusion capture engagement portion provided in the substantially spherical protrusion capture engagement means together with a substantially spherical protrusion provided on the metal crown. ..

The free-end denture and its attachment attachment according to one embodiment of the present invention are a free-end denture having a premolar as an artificial tooth and an elongated denture base in which a molar is fixed to the upper part (hereinafter, this is appropriately simplified and referred to as "a free-end denture". A free end denture (referred to as a denture) and a free end denture and its attachment attachment provided with an attachment for attaching the free end denture to an abutment tooth.

Attachments are provided on a substantially spherical protrusion 500 attached to a predetermined position on the side surface of a metal crown 51 to be placed on the crown 52, and a denture base 150 of a free end denture 100, and a plurality of elastic nail members 301 to one end are provided. A substantially cylindrical comb-toothed spherical protrusion engagement capture portion 300 made of 310 is composed of a substantially spherical protrusion capture engagement means 200 formed so as to extend, and an abutment together with a tooth root 92 with a metal crown 51 attached to the crown 52. It is designed to constitute the tooth 50.

The free end denture 100 includes an artificial denture 150, artificial teeth 110 (111, 112, 113, ...) Consisting of premolars and molars fixed to the upper part of the denture 150, and abbreviated dentures arranged in the denture. It has a spherical protrusion catching engagement means 200. The substantially spherical protruding portion capturing / engaging means 200 is attached to one end side of the denture 100 on the side adjacent to the abutment tooth 50, and is provided in a part thereof. The denture 100 can be attached to and detached from the abutment tooth 50 by engaging or disengaging at least a part of the periphery of the substantially spherical protrusion 500 of the metal crown 51 depending on the degree of elastic deformation of the denture. It is supposed to be.

That is, the substantially spherical protrusion catching engagement means 200 is viewed with the free end denture 100 attached to the abutment tooth 50, and the abutment tooth 50 is elastically engaged with at least a part of the substantially spherical protrusion 500. It has a substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 extending in a direction substantially orthogonal to the axial direction of the above.

The upper side and both sides in the width direction of the substantially cylindrical comb-shaped spherical protrusion engagement capturing portion 300 are surrounded by an upper side wall portion 151 and lateral wall portions 152 and 153, respectively, which are integrally formed with the denture base 150. The upper side wall portion 151 and the upper side of the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 are formed even if the upper elastic claw member 310 of the substantially cylindrical comb-toothed spherical protruding engagement capturing portion 300 is considerably bent and warped. The elastic claw member 310 has a sufficient gap space 25 so as not to interfere with the upper side wall portion 151.

Further, even if the tips of the lateral elastic claw members 304, 305, 306, 307 of the side wall portions 152, 153 and the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 are considerably bent and warped outward, these The elastic claw member of the above has sufficient gap spaces 26 and 27 so as not to interfere with the side wall portions 152 and 153.

Similarly, with respect to the elastic claw members 302, 303 on both diagonally lower sides and the elastic claw members 308, 309 on both diagonally upper sides, even if they are considerably bent and curved outward, respectively, the upper side wall portion 151 and the side wall portion 152 , 153 have sufficient clearance spaces 25-27 to prevent interference.

That is, the space surrounded by the upper side wall portion 151 and the side wall portions 152 and 153 formed at the abutment tooth side end portion of the free end denture 100 constitutes the elastic nail member accommodating recess portion 20 including the gap space 25 to 27. is doing.

Then, the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 connects the adjacent tip portions of the elastic claw members 301 to 10 when viewed from a direction substantially orthogonal to the extending direction of the elastic claw members 301 to 310. The virtual continuous line has a substantially elliptical shape (track shape for athletics), and its long axis extends substantially parallel to the extending direction of the axis of the abutment tooth 50.

Then, while the denture is being attached, a plurality of elastic claw members constituting the substantially cylindrical comb-toothed spherical protrusion engagement capture portion 300 of the substantially spherical protrusion capture engagement means 200, depending on the presence or absence of occlusion and the degree of occlusion at the time of occlusion. Of the 301 to 310, at least a part of the elastic claw members keeps capturing and engaging the substantially spherical protrusion 500 of the abutment tooth 50 in place of the substantially spherical protrusion 500, so that the free end denture 100 is kept attached to the abutment tooth 50. The base end portion of each elastic claw member 301 to 10 is opposed to the abutment tooth 50 of the free end denture 100, that is, the base end portion 210 of the elastic claw member fixing side of the substantially spherical protrusion capturing engagement means 200. It is formed extending from.

The tips of the elastic claw members 301 to 10 constituting each substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 project in the direction toward the elastic claw members 310 to 301 extending so as to face the positions farthest from each other. In addition, the denture 100 is provided with tapered protrusions 401 to 410 for assisting attachment / detachment / promoting attachment / detachment to promote attachment / detachment of the artificial tooth 100 to the abutment tooth 50.

Hereinafter, a more specific configuration of the substantially spherical protrusion capturing and engaging means 200 will be described. The substantially spherical projecting portion capturing / engaging means 200 is made of, for example, spring steel having excellent spring characteristics, and one end of a substantially cylindrical body having an elliptical end face view is machined by cutting, electric discharge machining, or other appropriate machining. It has a basic configuration in which the outer peripheral edge is left with a predetermined thickness and a certain length by means of the like, and after the inner edge thereof is deleted, slits are formed at predetermined intervals over the entire circumference of the outer peripheral edge.

That is, regarding the arrangement state of the plurality of elastic claw members 301 to 310 constituting the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 having a substantially elliptical shape in the end face view, a virtual continuation in which adjacent tip portions are connected to each other in the end face view. As shown in FIG. 3, the line is substantially spherical while forming a closed form in which a plurality of elastic claw members 301 to 1010 have a substantially elliptical end face view (track shape of athletics) parallel to each other at predetermined intervals. It is formed so as to project from one end of the projecting portion capturing engaging means 200. Then, the virtual continuous line connecting the adjacent tip portions in the end face view is surrounded by a plurality of elastic claw members 301 to 10 arranged so as to form a substantially circular shape in the end face view (track shape of athletics). In the spherical protrusion capture engagement space 30, at least a plurality of substantially spherical protrusions 500 formed at predetermined positions on the peripheral surface of the crown 52 are once captured and engaged in this space. It is held by the elastic force of the elastic claw member of.

It should be noted that each of the elastic claw members 301 to 10 constituting the substantially cylindrical comb-toothed spherical protrusion engagement catching portion 300 provided at one end of the substantially spherical protrusion engagement means has sufficient spring characteristics that can be deformed as a so-called elastic body itself. It is an elastic claw member made of spring steel having.

Further, in the present embodiment, a substantially spherical protrusion capture engagement space 30 is formed inside the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300 provided at one end of the substantially spherical protrusion engagement means.

Further, the tip of the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 and the inner circumference in the vicinity thereof are larger than the maximum diameter of the substantially spherical protrusion 500 so as to be firmly captured once engaged with the substantially spherical protrusion 500. It is formed so as to be slightly smaller.

Further, in the substantially cylindrical comb-tooth-shaped spherical protrusion engagement capturing portion 300, when the denture wearer picks the denture 100 with a finger and presses it against the abutment tooth 50 in the correct direction, the substantially spherical protrusion 500 of the abutment tooth 50 is formed. After bending a plurality of elastic claw members 301 to 10 on the denture base side outward (action 1), the tip of each elastic claw member 301 to 10 is overcome and the tip of the substantially spherical protrusion capture engagement space 30 and the vicinity thereof. Part of the elastic claw members 301 to 10 of the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 enters the inside and is slightly warped by the substantially spherical protrusion 500, respectively, and due to the elastic force generated by these slightly warped states. It is designed to hold firmly (action 2).

Further, when the denture 100 is picked up by a finger and removed from the abutment tooth 50, the substantially spherical protrusion 500 of the abutment tooth 50 is formed by a plurality of elastic claw members 301 to 310 of the substantially cylindrical comb tooth-shaped spherical protrusion engagement capturing portion 300. After bending a plurality of denture base side (action operation 3), the tip of the denture base is overcome and escapes from the tip of the substantially spherical protrusion capture engagement space 30 and the inside of the vicinity thereof, and the substantially spherical protrusion capture clerk. It has an elastic force to the extent that the engagement with the joint space 30 is released.

As described above, a taper shape for assisting attachment / detachment / promoting attachment / detachment toward the inside of the tip of each elastic claw member 301-310, that is, the inside of the substantially spherical protrusion capturing engagement space 30 so that the above operation can be performed reasonably. The protrusions 401 to 410 are provided respectively.

The tapered portion of the tapered protruding portion 400 for assisting attachment / detachment / promoting mounting / maintaining has a chevron shape that bulges substantially evenly in a side view, and the tapered portion on the tip side that has a downward slope toward the tip of the elastic claw member. The base end side taper portion that promotes the above-mentioned action operation 1 and has an ascending slope toward the tip of the elastic claw member is formed so as to promote the above-mentioned action operation 2 and Sato operation 3.

Hereinafter, the procedure for mounting the free end denture 100 according to one embodiment of the present invention on the abutment tooth 50 and the relative position (posture) of the free end denture 100 and the abutment tooth 50 when an occlusal operation is performed after mounting. ) Changes, and further, a procedure for removing the free end denture 100 from the abutment tooth 50 after occlusion in order to remove food residue and the like adhering to the denture 100 will be briefly described with reference to the drawings.

When attaching the denture 100 to the abutment tooth 50, the denture wearer first picks the denture 100 with a finger to capture the substantially spherical protrusion of the denture 100, and the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300 of the engagement means 200. Bring the tip closer to the substantially spherical protrusion 500 of the abutment tooth 50. That is, the relative positional relationship between the two is around the position (A1) of the arrow A in FIG.

Incidentally, FIGS. 7 and 8 (a) show these states. That is, FIG. 7 is a schematic side view showing a state immediately before attaching the free end denture 100 to the abutment tooth 50. Further, FIG. 8A shows a state in which the substantially spherical protrusion 500 is slightly separated from the tip of the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300 of the substantially spherical protrusion capture engagement means 200. It is explanatory drawing which shows by right side) and end face view (left side).

As a result, the plurality of elastic claw members 301 to 307 on the middle to lower side of the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300 provided in the substantially spherical protrusion capture engagement means 200 and the substantially spherical protrusion 500 are mutually connected. It will be in a close state.

The denture wearer then begins attaching the free end denture 100 to the abutment tooth 50. As a result, a virtual continuous line forming a substantially elliptical shape (track shape of athletics) connecting the tips of the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300 of the substantially spherical protrusion capture engagement means 200 is set as the outer peripheral boundary region of the space. A part of the curved surface on the tip side of the substantially spherical projecting portion 500 abuts on the tips of the elastic claw members 301 to 307 located below the middle of the substantially spherical projecting portion capturing engagement space 30. That is, the relative positional relationship between the two is around the position (A2) of the arrow A in FIG.

Incidentally, FIG. 8B shows these states. That is, FIG. 8B is a side view showing a state in which the substantially spherical protrusion 500 is in contact with the tips of the elastic claw members 301 to 307 on the middle and lower sides of the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300. It is explanatory drawing which shows (right side) and end face view (left side).

Subsequently, the free end denture 100 is further pressed against the abutment tooth 50. As a result, of the ten elastic claw members 301 to 10 of the substantially spherical protrusion catching and engaging means 200 on the distal end side curved surface of the substantially spherical protrusion 500 in the present embodiment, FIGS. 3 and 8 (b) The tapered protrusions 401 to 407 for assisting attachment / detachment / promoting attachment / detachment, which consist of curved surfaces inside the tips of the six elastic claw members 301 to 307 shown in the lower and middle parts of the above, abut.

As a result, the denture wearer further presses the denture 100 against the abutment tooth 50, so that the tapered protrusions 401 to 407 inside the tips of the elastic nail members 301 to 307 for assisting attachment / detachment and promoting attachment / maintenance are substantially spherical protrusions. Pushed by the curved surface of 500, the entire nail expands outward by elasticity. That is, the relative positional relationship between the two is around the position (A3) of the arrow A in FIG. At this time, inside the tips of the plurality of elastic claw members 301 to 307, the tapered portion formed on the claw tip side of the tapered protrusions 401 to 407 for assisting attachment / detachment / promoting attachment / maintaining promotes this operation.

Incidentally, FIG. 9C shows this state. That is, in FIG. 9C, the substantially spherical protrusion 500 is pressed against the tip of the elastic claw member 301-306 of the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300, and the lower and middle elastic claw members 301- It is explanatory drawing which shows the state which 307 was bent (only the bending of one elastic claw member 301 on the lowermost side in the figure is typically shown) in the side view (right side) and the end side view (left side).

When the pressing operation is further continued, the maximum outer diameter portion in the middle of the substantially spherical protrusion portion 500 pushes away the tip portions of these elastic claw members, and the end face view of the substantially cylindrical comb-toothed spherical protrusion engagement capture portion 300 is omitted. It enters the substantially spherical protrusion capture engagement space 30 having an elliptical shape (track shape of athletics).

As a result, a predetermined number of elastic claw members, that is, in the case of the present embodiment, become elastic claw members 301 to 307, but these remain a certain amount of warpage, and the elastic force generated by this leaves a substantially spherical protruding portion. While the 500 is captured and engaged, it enters the lower side of the substantially spherical projecting portion capturing and engaging space 30 having a substantially elliptical end face view. That is, the relative positional relationship between the two is around the position (A4) of the arrow A in FIG.

Incidentally, FIGS. 1 and 2 show this state. That is, FIG. 1 is a schematic side view showing a state in which the free end denture 100 according to the present invention is attached to the abutment tooth 50 in a partial cross section. Further, FIG. 2 is a schematic plan view showing a state in which the free end denture 100 according to the present invention is attached to the abutment tooth 50 in a partial cross section.

In this way, of the plurality of elastic claw members 301 to 310 constituting the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300, the lower and middle elastic claw members 301 to 307 are the substantially spherical protrusion 500. It enters into the connection recess 501 formed by the connection portion between the metal crown 51 and the metal crown 51. As a result, the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300 of the substantially spherical protrusion capture engagement means 200 engages in a state in which the substantially spherical protrusion 500 is reliably captured. As a result, the entire denture is completely attached to the abutment tooth 50.

Further, from the tapered protrusion 400 for assisting attachment / detachment / promoting attachment / detachment, inside the tips of the plurality of elastic claw members 301 to 307 whose tips are slightly deformed outward due to elastic force or have returned to their original state. The base end side tapered portion formed on the base end side of the claw again deviates from the substantially spherical protrusion 500 from the substantially spherical protrusion capture engagement space 30 having a substantially elliptical shape (track shape for athletics). prevent.

In the process of attaching the denture 100 to the abutment tooth 50 described above, the plurality of elastic claw members 301 to 307 of the substantially cylindrical comb-shaped spherical protrusion engagement capturing portion 300 are once pushed by the substantially spherical protrusion 500 and flexed. After the deformation, in the process of firmly capturing the substantially spherical protrusion 500 while returning to the shape close to the original or the original state, the contact deformation operation of each of the elastic claw members 301 to 307 with respect to the substantially spherical protrusion 500 causes the jawbone. It is transmitted through 91 and directly stimulates the hearing of the denture wearer as a bone conduction sound.

As a result, the present invention can exert a peculiar effect that can be more reliably perceived in addition to the sensation of feeling that the denture 100 is completely attached to the abutment tooth 50 with the ear or fingertip.

As described above, the substantially cylindrical comb-shaped spherical protrusion engagement capturing portion 300 of the denture 100 captures the substantially spherical protrusion 500, and the entire denture base is in close contact with the mucous membrane 90 via the saliva layer D. , The denture 100 can be firmly attached to the abutment tooth 50.

Subsequently, the occlusal motion will be described. When the denture wearer occludes to some extent, the denture force is applied to the entire denture and the denture base 150 is pressed against the mucous membrane 90 to sink to some extent. Along with this, the substantially spherical protrusion 500 is located around the middle of the substantially spherical protrusion capture engagement space 30 having a substantially elliptical end face view formed in the substantially cylindrical comb-toothed spherical protrusion engagement capture portion 300 in the major axis direction. Moving. That is, the relative positional relationship between the two is around the position (B1) of the arrow B in FIG.

With respect to the elastic claw members 301 to 10 that come into contact with the substantially spherical protrusions 500 with this movement, the elastic claw members 304 to 307, two each on the left and right in the middle of the figure, a total of four elastic claw members 304 to 307 are substantially spherical protrusions 500. While being pushed by the force and bending outward, an elastic force is applied to the substantially spherical protrusion 500, and the tapered protrusions 404 to 407 for assisting attachment / detachment and promoting attachment / maintenance on the inner end side of the tip of the elastic claw members 304 to 307. Maintains the engagement and capture state of the substantially spherical protrusion 500.

Incidentally, FIGS. 4 and 10 (e) show this state. That is, FIG. 4 is a schematic side view showing a partial cross-sectional view of the relative positional relationship between the free end denture 100 and the abutment tooth 50 when occlusion is started from the denture wearing state shown in FIG. Further, FIG. 10 (e) shows a substantially cylindrical comb-shaped spherical protrusion engagement with the substantially spherical protrusion 500 in a state where occlusion is started after the free-end denture 100 shown in FIG. 9 (d) is attached to the abutment tooth 50. It is explanatory drawing which shows the change of the relative positional relationship of each elastic claw member 301-310 of the catching part 300 in the side view (right side), and the end side view (left side).

Subsequently, when occluded with a larger force, the denture base 150 is further pressed against the mucous membrane 90, and the entire denture is subsided. Along with this, the substantially spherical protrusion 500 moves to the upper side in the major axis direction of the substantially cylindrical elliptical substantially spherical protrusion capture engagement space 30 formed in the substantially cylindrical comb-toothed spherical protrusion engagement capture portion 300. do. Along with this movement, the elastic claw members 304 to 310 in the middle of the figure and above it bend outward, and each of these elastic claw members 304 to 310 slightly warps, and the elastic force of itself is substantially spherical. Add to protrusion 500.

The wall surfaces of the side wall portions 152 and 153 on both sides of the elastic claw member accommodating recesses 20 that surround the elastic claw members 301 to 10 at predetermined intervals, and the elastic claws on the sides and diagonally above the elastic claw members 304 to 309. Necessary and sufficient spaces 26 and 27 remain between the members 304 to 309. As a result, even if the elastic claw members 304 to 309 on the side and diagonally upward of the elastic claw members 301 to 10 warp, they do not interfere with the side wall portions 152 and 153.

Then, the tapered protrusions 404 to 409 for assisting the attachment / detachment / promoting the maintenance of attachment of the tips of the elastic claw members 304 to 309 with which the substantially spherical protrusions 500 are in elastic contact exert an elastic force on the outer peripheral curved surface of the substantially spherical protrusions 500. Inside the substantially spherical protrusion catching engagement space 30 having an elliptical end face view, the catching state of the substantially spherical protrusion 500 is firmly maintained. That is, the relative positional relationship between the two is around the position (B2) of the arrow B in FIG. Here, the lower surface of the upper side wall portion 151 of the elastic claw member accommodating recess 20 that surrounds the elastic claw members 304 to 309 at predetermined intervals, and the uppermost elastic claw member 310 of the elastic claw members 301 to 310. A necessary and sufficient space 25 remains between them. As a result, the elastic claw member 310 on the uppermost side of the elastic claw members 301 to 10 can be warped further upward.

At the same time, the sinking of the denture base 150 is stopped by the compressive repulsive force from the mucous membrane 90 generated by the denture base 150 crushing the mucous membrane 90. That is, when the denture wearer occludes the denture 100, the entire denture sinks into the mucous membrane 90 as shown in FIGS. 4 to 5.

Then, as can be easily understood from the degree of change in the thickness of the mucous membrane 90 in these figures, the compressive repulsive force of the mucous membrane 90 increases according to the degree of subsidence of the denture 100 into the mucous membrane 90, and eventually the repulsive force becomes large. Balanced with quotient force, it stops further subsidence of the denture 100 against the mucosa 90.

Incidentally, FIGS. 5 and 10 (f) show this state. That is, FIG. 5 is a schematic side view showing a partial cross-sectional view of the relative positional relationship between the free end denture 100 and the abutment tooth 50 when occluded with a normal occlusal force following the state shown in FIG. .. Further, FIG. 10 (f) shows the elastic claw members of the substantially spherical protrusion 500 and the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 when occluded with a normal quotient force from the state shown in FIG. 10 (e). It is explanatory drawing which shows the change of the relative positional relationship of 301 to 310 in the side view (right side) and the end face view (left side).

From the above explanation, when the denture wearer occludes the denture 100, the occlusal force generated by the denture 100 is handled by the compressive repulsive force from the mucous membrane 90 generated by the entire denture base of the denture 100 crushing the mucous membrane 90. You can understand that it is possible.

From this state, for example, if you bite hard to crush harder food, or even if you are not eating, for example, if you clench your teeth to lift heavy furniture or luggage to your heart's content, the denture 100 will be described above. Even greater occlusal force is applied.

As a result, the unexpected subsidence of the denture base 150 with respect to the mucous membrane 90 further progresses, and the substantially spherical protrusion 500 is formed in the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300. It moves further upward along the long axis direction of the projecting portion capturing engagement space 30. That is, the relative positional relationship between the two is around the position (B3) of the arrow B in FIG.

In this movement of both, the uppermost elastic claw member 310 flexes considerably, and by increasing the elastic force applied to the substantially spherical protrusion 500, the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 causes the substantially spherical protrusion 500. Try to keep capturing.

In each of the above-described embodiments of the present invention, even when the denture wearer bites the denture 100 as strongly as possible, the elastic nail members 301 to 10 are surrounded by a predetermined interval in the same manner as described above. A necessary and sufficient space 25 remains between the lower surface of the upper side wall portion 151 of the elastic claw member accommodating recess 20 and the uppermost elastic claw member 310 of the elastic claw members 301 to 310.

As a result, the elastic claw member 310 on the uppermost side of the elastic claw members 301 to 10 can be warped further upward, so that such an action effect can be exhibited.

Incidentally, FIGS. 6 and 10 (g) show this state. This can be understood from the drawings below. That is, FIG. 6 is a schematic side view showing a partial cross-sectional view of the relative positional relationship between the free end denture 100 and the abutment tooth 50 in a state of being more strongly occluded from the state shown in FIG. Further, FIG. 10 (g) shows the elastic claw members 301 to 310 of the substantially spherical protrusion 500 and the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 when the state shown in FIG. 10 (f) is further strongly occluded. It is explanatory drawing which shows the change of the relative positional relationship of a side view (right side) and the end face view (left side). In these drawings, it is clearly shown that the elastic claw member 310, which is particularly the uppermost of the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300, is warped further upward.

That is, by having such a special configuration, the following actions can be exhibited. Specifically, the upper side wall portion 151 of the elastic claw member accommodating recess portion 20 that surrounds the periphery of the substantially cylindrical comb-tooth-shaped spherical protrusion engagement capture portion 300 by a predetermined interval, and the substantially cylindrical comb-tooth-shaped spherical protrusion engagement capture portion 300. By leaving a necessary and sufficient constant space 25 (see FIGS. 1 and 5) between the elastic claw member 310 on the uppermost side of the denture, an excessive occlusal force acts on the free end denture 100 more than necessary. However, the residual force that could not be absorbed by the mucous membrane 90 of this occlusal force is applied to the abutment tooth 50 via the substantially spherical protrusion 500 and the metal crown 51 to generate a moment that tilts the abutment tooth itself. To prevent.

As a result, the above-mentioned extra bite force quotient does not directly act on the periodontal ligament 96, which is a tissue that serves to connect the jawbone 91 and the tooth root 95 and cannot be naturally repaired once damaged. As a result, the present invention has a unique advantage that it is possible to prevent an unreasonable force from acting in the axial direction of not only the substantially spherical protrusion 500 but also the crown 52 and the root 95 to which the portion is attached. is doing.

Subsequently, when the meal is finished or when the excessive occlusion as described above is stopped, the positional relationship between the substantially spherical protrusion 500 and the substantially cylindrical comb-toothed spherical protrusion engagement capture portion 300 that captures the above-mentioned substantially spherical protrusion 500. Returns to the original order in the reverse order of the above, that is, in the reverse relative positional relationship. That is, the denture force does not act on the denture 100, and the denture 100 returns to the state shown in FIGS. 1 and 2 in the reverse order of the above-mentioned order with respect to the abutment tooth 50.

Then, the denture wearer picks and pulls the denture 100 with a finger as needed, such as after eating, and removes the denture 100 from the abutment tooth 50 (FIGS. 9 (d), (c), 8 (b). ), (A) and FIG. 7). In this case as well, the denture 100 can be easily removed from the abutment tooth 50 by the same continuous operation as described above.

Subsequently, further advantages peculiar to the present invention will be described. FIG. 11 shows the case where the mandibular surface of the portion where the mucous membrane 90, which is compressed by the sinking of the denture base 150 due to the occlusion, adheres to the upper side is flat, and the case where the mandibular surface is uneven and uneven, at the time of occlusion. The change in the relative positional relationship of each of the elastic claw members 301 to 10 of the substantially spherical protrusion 500 of the abutment tooth 50 and the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300 with respect to the degree of occlusal condition of the jawbone 91. It is explanatory drawing which shows according to the state.

Specifically, FIG. 11 (1) is an explanatory view showing a state before and after occlusal when the denture base 150 is flat over the entire area with respect to the contact surface of the jawbone 91 with the mucous membrane 90 at the portion where the denture base 150 sinks into the mucous membrane 90. be. 11 (2) shows one side of the mandible 91 corresponding to the width direction of the mandible 150 with respect to the contact surface of the mandible 91 at the portion where the denture base 150 sinks into the mucous membrane 90 (right side in the figure). Is convex on one side (right side in the figure) of the mandible 91 corresponding to the width direction of the mucous membrane 90 compressed by the denture base 150. Therefore, it is explanatory drawing which shows the state before and after occlusion.

In FIG. 11, the vertically long rectangle surrounding the substantially cylindrical comb-shaped spherical protrusion engagement capturing portion 300 is the lower surface of the upper side wall portion 151 (upper sides of the four sides) of the denture base 150 and the side wall portions 152 on both sides. 153 (left and right sides of the four sides) and the bottom surface (lower sides of the four sides) of the denture base 150 that can be seen beyond the elastic claw member accommodating recess 20 are shown.

A case where the mucous membrane 90 is provided on the uneven surface such that the height of the right side of the mandible 91 is higher than the height of the left side will be considered based on FIG. 11 (2). In this case, in the state where the denture 100 is attached to the abutment tooth 50, the relative postures of the denture 100 and the abutment tooth 50 are the specified postures as in FIG. 11 (1) (FIG. See the figure on the lower middle side). However, when the entire denture base is subsided to the mucous membrane 90 by the occlusal force by biting the denture 100 for the first time after that, the relative posture changes as compared with FIG. 11 (1). Go (see the upper figure in the figure).

At this time, the problem is that the right side of the mandible 91 in the figure is higher than the height of the left side, so that the mucous membrane 90 covering the jawbone 91 also covers the mandible 91 at a corresponding height. Therefore, if the bottom surface of the denture base 150 remains horizontal and sinks into the mucous membrane 90 when the denture base 150 is strongly occluded, the occlusal force concentrates only on the portion of the mucous membrane 90 on the right side in the drawing. As a result, the mucous membrane 90 in this portion is compressed more than necessary, which causes inflammation. It may also damage the mucosa 90, eventually leading to the development of troublesome pressure ulcers.

However, according to the present invention, when the denture base 150 sinks, it is possible to appropriately cope with the reaction force generated by the compressive force of the mucous membrane 90. Specifically, in the above case, since the mucous membrane 90 covering the right side of the mandible 91 in the figure is first compressed, the reaction force received from this portion becomes large, and this large reaction force is also transmitted to the right side of the denture base 150. ..

As a result, a virtual continuous line having a substantially elliptical shape (track shape for athletics) connecting the tips of the elastic claw members 301 to 10 constituting the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 having an elliptical end face view. The elastic claw members 308 and 306 on the upper right side in the long axis direction bend more than the amount of bending of the elastic claw members 309 and 307 on the upper left side located symmetrically with respect to the long axis.

As a result, while applying a large elastic force to the substantially spherical projecting portion 500 at the former elastic claw members 308 and 306, the long axis of the virtual continuous line having an elliptical end face view in the drawing (the elastic claw members 301 and 310 in the drawing). The upper side of the (virtual continuous line) to be connected) is slightly biased to the left side of the substantially spherical protrusion 500 divided by the vertical line LL, while the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 provides the substantially spherical protrusion 500. Move to capture and engage.

As a result, as can be seen from the comparison of the degree of thickness of the compressed mucous membrane 90 in FIGS. 11 (1) and 11 (2), the degree of change in the thickness of the mucous membrane 90 on the right side in the figure is made equal to the thickness on the left side. , Prevents the occurrence of harmful effects due to the extreme compression of the right side portion of the mucous membrane 90 described above.

That is, the above-mentioned mucosa 90 is prevented from occurring locally, and the periodontal ligament 96, which plays an important role in connecting the mandible 91 and the tooth root 95, is damaged by an unreasonable force. To prevent.

On the other hand, FIG. 11 (3) shows the other side of the mandible 91 corresponding to the width direction of the denture base 150 with respect to the contact surface of the jawbone 91 at the portion where the denture base 150 sinks into the mucous membrane 90 (left side in the figure). It is convex in. Therefore, correspondingly, the mucous membrane 90 has a convex shape on the other side (left side in the figure). Therefore, it is explanatory drawing which shows the state before and after occlusion.

A case where the mucous membrane 90 is provided on the uneven surface such that the height of the left side of the mandible 91 is higher than the height of the right side will be considered based on FIG. 11 (3). In this case, in the state where the denture 100 is attached to the abutment tooth 50, the relative postures of the denture 100 and the abutment tooth 50 are the specified postures as in FIG. 11 (1) (in the figure). See the figure below). However, when the entire denture base is subsided to the mucous membrane 90 by the occlusal force by biting the denture 100 for the first time after that, the relative posture changes as compared with FIG. 11 (1). Go (see the upper figure in the figure).

At this time, the problem is that the left side of the mandible 91 in the figure is higher than the height of the right side, so that the mucous membrane 90 covering the jawbone 91 also covers the mandible 91 at a corresponding height. Therefore, if the bottom surface of the denture base 150 remains horizontal and sinks into the mucous membrane 90 when the denture base 150 is strongly occluded, the occlusal force concentrates only on the portion of the mucous membrane 90 on the left side in the drawing. As a result, the mucous membrane 90 in this portion is compressed more than necessary, which causes inflammation. In addition, the mucous membrane 90 may be injured, eventually leading to the development of troublesome decubitus ulcers.

However, according to the present invention, when the denture base 150 sinks into the mucous membrane 90, it is possible to appropriately cope with the reaction force generated by the compressive force of the mucous membrane 90. Specifically, in the above case, since the mucous membrane 90 covering the left side of the mandible 91 in the figure is first compressed, the reaction force received from this portion becomes large, and this large reaction force is also transmitted to the left side of the denture base 150. ..

As a result, the length of the virtual continuous line forming a substantially elliptical shape (track shape for athletics) connecting the tips of the elastic claw members 301 to 310 constituting the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 having an elliptical end face view. The elastic claw members 309 and 307 on the upper left side in the axial direction bend more than the amount of bending of the elastic claw members 308 and 306 on the upper right side located symmetrically with respect to the long axis.

As a result, while applying a large elastic force to the substantially spherical projecting portion 500 at the former elastic claw members 309 and 307, the long axis of the virtual continuous line having an elliptical end face view in the figure (elastic claw members 301 and 310 in the figure). The upper side of the (virtual continuous line) to be connected) is slightly biased to the left side of the substantially spherical protrusion 500 divided by the vertical line LL, while the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300 provides the substantially spherical protrusion 500. Move to capture and engage.

As a result, as can be seen from the comparison of the degree of thickness of the compressed mucous membrane 90 in FIGS. 11 (1) and 11 (3), the degree of change in the thickness of the mucous membrane 90 on the left side in the figure is made substantially equal to the thickness on the right side. This prevents the occurrence of harmful effects due to the extreme compression of the left side portion of the mucous membrane 90 described above.

That is, the above-mentioned mucosa 90 is prevented from occurring locally, and the periodontal ligament 96, which plays an important role in connecting the mandible 91 and the tooth root 95, is damaged by an unreasonable force. To prevent.

A supplementary explanation to support the above effects is given below. Bite force quotient is extremely large, about 3 MPa to about 9 MPa (average 30 kg to 90 kg per ^{1 cm 2} (300 tons to 900 tons per ^{1 m 2)).} Then, according to the present invention, it is possible to prevent such an occlusal force from being applied to the abutment tooth 50 as an impact force when the occlusal force is fully occluded.

In this way, it is possible to prevent such a large bite force quotient from being applied as an impact force to the abutment tooth 50, that is, the periodontal ligament connecting the tooth root 95 and the jawbone 91, and only one for attaching the denture 100 of the present invention. The abutment tooth 50 made of the above can be maintained in a healthy state for a long period of time.

As a result, once the free end denture according to the present invention and its attachment attachment are attached, the attached state can be maintained for a long period of time, and there is no need to frequently visit a dental clinic for maintenance, and the free end denture does not need to be visited frequently. And its attachment attachment can be prevented from breaking and causing serious problems such as reattaching a new free end denture and its attachment attachment.

Next, the effects peculiar to each embodiment and each modification described above, that is, the peculiar effects based on the configuration of the present invention will be described. According to the present invention, by having the attachment as described above, the denture has only the engaging force that the substantially cylindrical comb-shaped spherical protrusion engagement capturing portion 300 captures and engages with the substantially spherical protrusion 500 and the adhesion of the mucous membrane 90 of the denture base 150. It has a structure in which 100 is attached to the abutment tooth 50.

As a result, at the moment when the free end denture 100 is attached to the abutment tooth 50, the substantially cylindrical comb-shaped spherical protrusion engagement capture portion 300 firmly captures and engages with the substantially spherical protrusion 500, and thus during this capture engagement. The sensation of engagement directly stimulates the hearing of the denture wearer as a bone conduction sound instead of the nerve of the fingertip, and is transmitted directly to the brain via the trigeminal nerve, so that the denture 100 firmly attaches to the abutment tooth 50 even in old age. You can definitely feel (confirm) that you have installed it.

Therefore, the denture 100 can be easily attached and detached by oneself without the trouble of having a third party such as a caregiver assist or confirm the attachment.

Further, the attachment does not have a component such as a magnet that attracts the free end denture 100 and the abutment tooth 50 by a magnetic tensile force. This makes it possible to reduce the size of the entire denture. Since the width of the denture 100 (thickness in the direction connecting the outside and the inside of the mouth) can be reduced by downsizing the free end denture 100, a portion having a small width of the root or crown, for example, an anterior tooth or a tooth in the vicinity thereof can be reduced. Also, the denture 100 according to the present invention can be attached.

In this way, by realizing the free-end denture 100 that can be attached and detached by itself, which has been miniaturized by the present invention, it can be used by women with small occlusal diameters and elderly people who wear dentures whose occlusal diameter contracts with age. When wearing the denture 100, the degree of freedom regarding the wearable target person and the wearable occlusal site is increased.

Note that, unlike the configuration of the above-described embodiment, the attachment may include a magnet 600 as a modification of the present invention. Hereinafter, the form of this modification will be described with reference to the drawings.

FIG. 12 shows an abutment of a free-end denture 100 in which a magnet 600 for maintaining a secure mounting state of the denture 100 with respect to the abutment tooth 50 is arranged inside, in addition to a substantially cylindrical comb-toothed spherical protrusion engagement capturing portion 300. It is a schematic side view corresponding to FIG. 1 which shows the state attached to the tooth 50.

In the free end prosthesis 100 according to the present modification, for example, the substantially spherical protrusion catching engagement means 200 including the substantially cylindrical comb-shaped spherical protrusion engaging capture portion 300 is made of a non-magnetic material, while at least abbreviated attachments. The spherical protrusion 500 is made of a magnetic material.

Then, when the free end denture 100 is attached to the abutment tooth 50, a substantially cylindrical comb-toothed spherical shape made of a non-magnetic material is formed inside the substantially spherical protruding portion capturing engagement means 200 made of a non-magnetic material in the longitudinal direction thereof. It has a configuration in which the magnet 600 is arranged at a position adjacent to the projecting engagement capturing portion 300 and at a position opposite to the substantially spherical projecting portion 500.

The magnet 600 is adapted to at least exert a magnetic tensile force on the substantially spherical protrusion 500 made of the magnetic material to help maintain the mounted state of the free end denture 100 on the abutment tooth 50.

In this case, the size of the entire free-end denture is larger than that in which the magnet 600 is not arranged inside the denture 100, and the denture wearer who has a small occlusal diameter and whose occlusal diameter contracts with age. Even if there is, it is possible to attach the free end denture 100 according to this modification to the back teeth having a sufficient mounting space.

Then, once the free end denture 100 is attached to the abutment tooth 50 by utilizing the magnetic tensile force of the magnet 600 in addition to the engaging force of the substantially cylindrical comb-toothed spherical protruding engagement capturing portion 300, it is in occlusion. The denture 100 can be made more difficult to come off from the abutment tooth 50.

The functions and effects common to the embodiments of the present invention and modifications thereof described above will be additionally described below. Each of these elastic claws has a long axis of a virtual continuous line connecting adjacent tip portions of each elastic claw member according to the above-described embodiment substantially parallel to the extending direction of the axis of the abutment tooth. The end-view elliptical space surrounded by the members also serves as a guide portion (guide portion) that guides the occlusal force acting on the free end denture in the correct direction. This also has a role of correcting an unfavorable biting habit. As a result, it becomes possible to get into the habit of chewing food to the extent that it can promote digestion and absorption.

In addition to the above, it will be described that the problem of scrubbing, which has been widely used for a long time, can be solved at once by the present invention. When a conventionally used denture with a clasp is attached to the abutment tooth, the quotient force is about 3 MPa to about 9 MPa (average 30 kg to 90 kg per ^{1 cm 2} (300 tons to 900 tons per ^{1 m 2)) as described above.} )) Is extremely large. When such a large occlusal force, which constantly changes in orientation and size during occlusion, acts on the clasp part of a denture with a clasp that is commonly used in the past, this part loosens or breaks due to metal fatigue. There is a problem of chilling.

Also, after long-term use, the clasp will loosen and the denture will come off easily, so that the denture that is about to come off in the mouth will continue to be pressed with the tongue, or the denture will accidentally come off due to sneezing and pop out of the mouth. It has not been possible to continue using it for a long period of time due to such a situation, and it has hindered the improvement of quality of life, which is regarded as important for the advent of an aging society in recent years.

Furthermore, when using a denture equipped with a conventional clasp, regular check for looseness of the clasp part, etc., and when a loose part is found, time-consuming maintenance to restore this part. Needs. Also, when removing and cleaning a denture with a conventional clasp, especially for denture wearers with fingertips, the denture is accidentally dropped on the floor and the metal clasp part bends. There is also a risk of breaking or breaking. In such a case, if this part of the clasp is restored to its original state, or if it is bent or damaged to the extent that it cannot be repaired, it causes a troublesome problem that the entire clasp must be replaced with a new one. ..

Then, while requesting repair or replacement of the clasp part, the denture cannot be used, which is extremely inconvenient. However, according to the present invention, since a metal part such as a clasp for fixing and supporting the denture is not provided on the outside of the denture, such inconvenience does not occur at all, and the denture is almost maintenance-free. It has a great merit that you can continue to use it with confidence.

Specifically, if a general denture fixed with a clasp is used for a long period of time, the clasp part will plastically deform and eventually fatigue fracture, and the tip will break to the mucous membrane and tongue in the mouth. They can be pierced and damaged, or clasp fragments can be swallowed with food, leading to accidental ingestion.

However, when the free end denture and its attachment attachment according to the above embodiment are used, the abutment tooth itself plays its role without the complicated movement of the denture accompanying such occlusion having a mechanical effect on the abutment tooth. It can be retained for a long period of time while being maintained, and the denture itself can be used for a long period of time without being damaged.

In addition, since the entire denture is attached to the abutment tooth with respect to the protrusion for engaging the denture in the recess for accommodating the abutment tooth inside the denture without using a clasp, a metal member such as a clasp is exposed to the outside. There is nothing to do. As a result, the metal part of the clasp is not visible from the outside when the mouth is opened, and at first glance it is not clear that the denture is worn. Therefore, the denture according to the present invention is viewed from an aesthetic point of view. Can be said to be very good. In addition, denture wearers can go out from this point of view and enjoy conversations with friends and acquaintances without hesitation, and if questions arise while shopping or attending lectures, the other party will be fully satisfied. It is possible to listen without hesitation with an audible voice.

It should be noted that each of the above-described embodiments is merely an example of the contents of the present invention, and within the scope of the present invention, free end dentures having various structures having different shapes, materials, sizes, etc. Needless to say, it may be a mounting attachment.

Specifically, for example, instead of the above-described embodiment, a plurality of elastic claw members connect the adjacent tip portions of each elastic claw member when viewed from a direction substantially orthogonal to the direction in which they extend. The base end portion of each elastic claw member may be formed extending from the side facing the abutment tooth of the free end denture so that the continuous line matches the shape near the maximum diameter of the substantially spherical protruding portion.

In this case, similarly to the above-described embodiment, the substantially spherical protrusion moves in the direction of approaching or moving away from the mucous membrane along the axial direction of the abutment tooth according to the vertical movement of the free end denture during occlusion. However, the plurality of elastic claw members have sufficient flexibility to ensure that the substantially spherical protrusions that reciprocate along the axial direction of the abutment teeth are captured and engaged during occlusion. Then, the object of the present invention can be achieved.

Further, for example, instead of being formed based on a crown in which the abutment tooth is covered with a metal crown and a root portion integrated with the crown, a residual root portion having a protruding portion forming an upper portion of the abutment tooth at the upper portion. The present invention can be applied even if it is formed by using or an implant.

Specifically, even if the attachment has a substantially spherical protrusion instead of a metal crown and has an upper portion of the abutment tooth that is attached to the residual root to form an abutment tooth, the present invention is used. It is included within the scope of the invention, and its action and effect can be fully exerted.

Further, even in the case of an attachment having a substantially spherical protrusion instead of a metal crown and having an upper portion of the abutment tooth which is attached to an implant to form an abutment tooth, the present invention is also provided. It is included in the range, and its action and effect can be fully exerted.

Specifically, the present invention relates to a residual root portion that is connected to the jawbone via the periodontal ligament and must be extracted once the periodontal ligament is damaged, or an implant that needs to be used for a long period of time once it is implanted. By using it as a part of the free end denture and the abutment tooth of its attachment, it is possible to prevent damage to the residual root and the implant, and at the same time, the residual root and the implant can be placed close to each other with only one abutment tooth. It is not necessary to provide a denture using the above, and the denture according to the present invention can be used for a long period of time at no cost.

In the above-described embodiment, a plurality of artificial teeth such as molars and premolars are provided on the free end denture itself together with a drawing for explaining this, but in this way, a plurality of artificial teeth are not necessarily provided on the free end denture. It is not necessary to have teeth, and the present invention can be applied even if the free end denture is provided with an artificial tooth consisting of only one molar or premolar.

Finally, the merits peculiar to the present invention by the inventor of the present invention who have been involved in actual dental care for many years will be added. When a free-end denture as in the present invention is attached, it should be noted that the mucous membrane itself, which is pressed against the denture base and sinks, has uniform elasticity over the bottom surface of the entire denture base. It should be noted that this is not the case. The reason for this is that, for example, the contact surface of the jawbone that exists under the mucosa with the mucosa of the jawbone cannot always be flat, and there are protrusions or dents on the contact surface of the jawbone with the mucosa. So to speak, it is usually a continuous contact surface with irregularities.

In such a case, when the denture base presses the mucous membrane due to the occlusal force and the entire denture base sinks, the distribution of elasticity naturally occurs in the entire contact portion between the mucous membrane and the denture base.

On the other hand, for example, in the case of a free-end denture having a structure in which one end is connected to the abutment tooth in a ball joint shape, the degree of freedom of movement is far greater than that of an intermediate missing tooth prosthesis whose both ends are supported by the abutment tooth (entire prosthesis). How to move) becomes larger.

Therefore, when the denture has a ball joint-like shape and the free end denture is pressed against the mucous membrane and sinks or returns to its original position with the occlusal movement around one end, the above-mentioned case is described above. The mucous membrane is locally pressed against the protruding convex part of the mandible, and this part is particularly pressed against the denture base and is compressed more than necessary.

Here, in general, the number of occlusions in one meal is several hundred times, and especially for the elderly, it is necessary to chew and swallow food a particularly large number of times so as not to burden the digestive organs such as the gastrointestinal tract. There is. Therefore, the above-mentioned part of the mucous membrane that is locally compressed more than necessary is compressed by the denture base for this number of times, and this part becomes inflamed and swollen. It may not be possible to add.

In such a state, the food that is not chewed sufficiently is swallowed, and then the gastrointestinal tract, which is the digestive organ, is overloaded. In general, many denture wearers are elderly, and there is concern that such an excessive burden on the gastrointestinal tract will be a major factor in impairing health.

In addition, it is necessary to go to the dentist's office to treat the inflamed part of the mucous membrane and perform regular visits to the dentist's office to see the condition of the affected area while performing maintenance by scraping a part of the free end denture. It is very burdensome for the denture wearer in terms of cost and time.

In addition, when swallowing food that has not been sufficiently chewed, there is a concern that the esophageal organs may accidentally enter the bronchi and cause aspiration pneumonia instead of reaching the stomach.

On the other hand, according to the present invention, by having the above-described configuration, the entire denture base slides and moves, and the outer surface of the substantially spherical protrusion is captured and engaged by a plurality of elastic claw members when occluded. The posture of the denture base is so-called rolling or pitching when the entire denture base is submerged in the mucous membrane so that the same compressive force as other parts does not act on the part of the mucous membrane that overlaps the upper side of the protruding part of the jawbone as described above. As described above, the portion of the mucous membrane that overlaps the upper side of the protrusion of the mandible is formed by rotating the denture base at a certain angle around the longitudinal axis or making an angle with respect to the axis. It can be prevented from being extremely compressed and leading to inflammation.

That is, in the case of the present invention, when the denture base of the free end denture due to occlusion sinks into the mucous membrane, it corresponds to so-called "play" such as backlash that the gear, which is one of the mechanical elements, always has, for example. Since it has a degree of freedom to perform, it is possible to prevent the above-mentioned mucosal inflammation associated with multiple occlusions.

As a result, the denture wearer can comfortably perform a sufficient occlusal motion without feeling pain or discomfort. Sufficient occlusal movement leads to sufficient movement of the medial pterygoid muscle of the jaw during meals. This activates the movement of the pterygoid venous plexus and promotes the circulation of blood flow in the brain, thereby maintaining a clear brain and thinking circuit regardless of age and contributing to the prevention of the onset and progression of dementia. do.

20 Elastic claw member accommodating recesses 25, 26, 27 Gap space 30 Approximately spherical protrusion capture engagement space (comb-shaped elliptical elastic cylinder)
50 Abutment tooth 51 Metal crown 52 Crown 90 Mucosa 91 Jawbone 92 Tooth root 95 Tooth root 96 Periodontal ligament 100 Free end denture 110 (111, 112, 113, ...) Artificial teeth (molars, premolars)
150 Prosthesis bed 151 Upper side wall part 152, 153 Side wall part 200 Approximately spherical protrusion capture engagement means 210 Elastic nail member Fixed side base end portion 300 Approximately cylindrical comb tooth-shaped spherical protrusion engagement capture part 301, 302, 303 ,.・ ・ 310 Elastic claw member 400 (401, 402, 403, ..., 410) Tapered protrusion for attachment / detachment assistance / attachment maintenance promotion 600 Magnet 500 Approximately spherical protrusion 501 Connection recess D Saliva layer LL Vertical line

Claims (7)

In a free end denture that can be attached to and detached from one abutment tooth and its attachment
The attachment has a substantially spherical protrusion attached to a predetermined position on the side surface of a metal crown to be placed on the crown, and a substantially spherical protrusion provided on the denture base of the free-end denture and having a substantially cylindrical comb-shaped spherical protrusion engagement catching portion. It consists of a part catching engagement means
The abutment tooth is configured with the metal crown attached to the crown.
The free-end denture has a denture body and the substantially spherical protrusion catching / engaging means provided on the denture body, and forms a part of the substantially spherical protrusion catching / engaging means. The combined capture portion is attached to one end side of the denture body close to the abutment tooth, and is provided on a part thereof depending on the degree of elastic deformation of the substantially cylindrical comb-shaped spherical protrusion engagement capture portion. by releasing the or engage engagement while capturing at least a portion of the periphery of the substantially spherical protrusions of metallic crowns, Yu allow detachable with respect to the abutment of the free end denture Hanaretan a denture and its mounting attachment,
The substantially cylindrical comb-shaped spherical protrusion engagement capture portion forming a part of the substantially spherical protrusion capture engagement means is the entire substantially spherical protrusion when viewed with the free end denture attached to the abutment tooth. It has a plurality of elastic claw members extending in a direction substantially orthogonal to the axial direction of the abutment tooth so as to elastically engage with at least a part of the circumference.
The length of the substantially cylindrical comb-toothed spherical protrusion engagement capturing portion is a virtual continuous line connecting adjacent tip portions of each elastic claw member when viewed from a direction substantially orthogonal to the extending direction of the elastic claw member. The shafts are arranged so as to form a substantially elliptical shape so as to be substantially parallel to the extending direction of the axis of the abutment tooth.
In addition to the case where the denture is not occluded while the denture is attached, at least a part of the plurality of elastic nail members is substantially spherical of the abutment tooth depending on the degree of occlusal. By continuing to capture and engage the protruding portion, the base end portion of each elastic claw member is with the abutment tooth of the free end denture so as to maintain the mounted state of the free end denture on the abutment tooth. It extends from the opposite side and is formed.
In the plurality of elastic claw members, when viewed from a direction substantially orthogonal to the extending direction, the virtual continuous line connecting the adjacent tip portions of the elastic claw members is near the maximum diameter of the substantially spherical protrusion. A free end denture and its attachment attachment , wherein the base end portion of each elastic nail member extends from the side of the free end denture facing the abutment tooth so as to match the shape of the free end denture. .. The tip of each elastic claw member projects in a direction toward the elastic claw member extending so as to face each other, and the attachment / detachment assistance / attachment / maintenance that promotes the maintenance of the attachment state of the free end denture with respect to the abutment tooth The free-end denture and its attachment attachment according to claim 1, wherein the denture has a tapered protrusion for facilitation. While the substantially spherical protrusion capturing and engaging means is made of a non-magnetic material, at least the substantially spherical protrusion of the attachment is made of a magnetic material.
When the free end denture is attached to the abutment tooth, the position inside the free end denture in the longitudinal direction adjacent to the substantially cylindrical comb-shaped spherical protrusion capturing engagement portion is the substantially spherical shape. A magnet is placed on the opposite side of the protrusion,
The magnet is characterized in that it exerts at least a magnetic tensile force on a substantially spherical protrusion made of the magnetic material, which is sufficient to help maintain the mounted state of the free end denture on the abutment tooth. 1 or the free end denture according to claim 2 and its attachment attachment. The claim is characterized in that, instead of the metal crown, the substantially spherical protrusion is provided at a predetermined position, and the abutment tooth upper body portion is provided so as to form an abutment tooth by attaching to the residual root portion. 1 to free end denture and its mounting attachment according to claim 3. Claim 1 is characterized in that, instead of the metal crown, the substantially spherical protrusion is provided at a predetermined position, and the abutment tooth upper body portion is provided so as to form an abutment tooth by attaching to an implant. The free end denture according to any one of claims 3 and its attachment. Claims 1 to attachment according to any one of claims 1 to 5 for detachably attaching the free end denture according to claim 5. Claims 1 to free end denture according to any one of claims 1 to 5 for detachably attaching the abutment tooth with the attachment according to claim 5.

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