JP2583192B2 - Head for artificial roots - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head for an artificial dental root.

[0002]

2. Description of the Related Art Conventionally, a head for an artificial tooth root has a screw hole opened on an upper surface, and a denture is fixed to the tooth root by screwing into the screw hole. In addition, when a natural root remains, the magnetic body having a smooth upper surface is fixed to the upper part of the remaining root, and the denture on which the magnet is fixed on the mucosal surface side of the denture base and at the alveolar bone covering site is covered, The denture is attracted to the root side by the attraction force of the magnet to fix the denture.

[0003]

However, in the conventional structure in which the artificial tooth is provided and the denture is mounted, there is an advantage that the denture can be fixed without knowing the fixing means, but the denture cannot be easily removed. Therefore, there is a problem that it takes time to repair the denture when it is damaged. Also, in order to make the denture detachable, a magnet is provided on the denture, and even if the magnet is attracted to the head to fix the denture, the head does not have an attraction surface, so that the magnet cannot be fixed. is there.

On the other hand, a structure in which a magnetic material is fixed to a remnant root and a magnet is attracted to the magnetic material to fix a denture has the advantage that the denture can be attached and detached by the person at any time. Depending on the number, it is not possible to fix the magnetic body horizontally or to fix multiple magnetic bodies while keeping parallelism,
There was a problem that the difference in the stability of the denture appeared.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and an object of the present invention is to enable a denture to be mounted with good stability.
An object of the present invention is to provide a head for an artificial tooth root which does not adversely affect the health of a user and does not hinder an image diagnosis and is easy to maintain.

[0006]

According to a first aspect of the present invention, there is provided a dental implant head having a coarse thread groove formed on an inner peripheral surface of the jaw bone from the outside to the inside of the jaw bone. Forming a cylindrical artificial tooth root joined to the inner peripheral surface of the thread groove, the artificial tooth root has a counterbore at its head, and a female screw having a smaller diameter at the bottom of the counterbore. A magnetic head comprising a male threaded portion screwed with the female threaded portion, a seat portion fitted to the counterbore portion, and a side portion having a square or knurled or serrated side surface. A denture base having an artificial tooth on the outside, having a mucosal surface formed on the inner surface side of the denture base so as to fit to the gingiva covering the outer peripheral surface of the jaw bone, and formed at a portion of the mucosal surface which comes into contact with the head. A magnet that fits into the recess formed, and the magnet and the head Facing both sides closely attracted by the magnetic attraction force, and was removably formed with the structure of the head relative to the artificial dental root.

According to a second aspect of the present invention, there is provided a head for an artificial tooth root, wherein the head is formed of a base portion and a suction surface forming portion made of a magnetic material, and the suction surface forming portion is formed on an upper surface of the base portion. The structure was fixed by casting.

[0008]

In the artificial tooth root head according to the first aspect, the artificial tooth root is first screwed into a mounting hole formed in the jaw bone of a patient to be buried and fixed, and the head is fixed to this artificial tooth root and a denture is mounted. In this case, a magnet is fixed to a portion of the denture base where the head comes into contact. When such a denture is mounted, the denture can be easily fixed at a correct position by the magnet attracting the attraction surface of the head formed of a magnetic material. In addition, by fixing the head to each of the appropriately placed artificial roots, the denture can be fixed with high stability. In addition, since the denture can be attached and detached by the person, the denture can be removed when not necessary or when performing maintenance. In addition, since the magnet is attached to the denture, the human body is safe without adverse effects of magnetism, and the denture is removed when performing an image diagnosis using an MRI-CT scanner (magnetic resonance imaging-computed tomography apparatus). By doing so, it can be performed without hindrance. Further, since the head is detachably attached to the artificial tooth root, maintenance such as repair or replacement of the head is easy.

In the artificial tooth root head according to the second aspect, since the suction surface forming portion is formed by casting, the suction surface can be formed to be inclined in an arbitrary direction during casting. Therefore, when the artificial tooth root is not buried vertically in the jawbone, etc., by setting the inclination direction of the suction surface and casting,
A uniform level of all the suction surfaces can be obtained, so that a denture suitable for the user can be efficiently manufactured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below in detail with reference to the drawings. First, the configuration of the embodiment will be described. FIG.
FIG. 2 is an explanatory view showing a procedure for attaching the head of the artificial tooth root of this embodiment, and FIG. 2 is a plan view showing the head. The head 1 of this embodiment is made of magnetic stainless steel, and has a head 2 and a seat 3.
And the male screw portion 4 as main components.

The head 2 has a side part 5 formed in a regular octagon, and an upper surface 6 is finished with a smooth suction surface 6a. The upper surface 6 has substantially the same size as an attraction surface 7a of a magnet 7 described later. The seat 3 is provided with a counterbore 9 provided on a conventionally known artificial tooth 8 embedded in the mandible.
, And a male screw portion 4 is protruded from a lower portion thereof. The male screw portion 4 is provided with a counterbore portion 9 of the artificial tooth root 8.
Is screwed with the female screw portion 10 provided subsequently.

The artificial tooth root 8 is formed in a cylindrical shape, and a thread groove 11 having a coarse pitch is provided on the outer peripheral surface. The artificial tooth root 8 is embedded in the lower jaw bone 12 of the patient, and the upper surface 13 is embedded in the upper end of the gingiva 14 at a depth substantially equal to the thickness of the head 2 of the head 1. .

In FIG. 1, reference numeral 15 denotes a denture. An artificial tooth 17 is provided on a resin bed 16 and a magnet 7 is fixed to a mucous membrane surface 18 formed in a concave shape. The magnet 7 is for a conventionally known denture. When the magnet 7 is fixed to the denture 15, first, the head 1 is screwed onto the artificial root 8, and the mucous membrane of the resin bed 16 facing the head 2 is fixed. A recess 20 is provided on the surface 18 and a resin 20 is mounted thereon. Then, the denture 15 is mounted while the magnet 7 is attracted to the head 2. In this way, the magnet 7 is accurately positioned on the denture 15 and fixed by the resin 20.

In the case of an edentulous jaw, four magnets 7 can be attached if four artificial tooth roots 8 are embedded at appropriate positions, so that a sufficient fixing force can be obtained.

Next, the operation will be described. The head 1 is attached to the artificial tooth root 8 only by screwing the male screw part 4 into the upper female screw part 10 of the artificial tooth root 8 previously screwed and embedded in the lower jaw bone 12 of the patient. And this head 1
When the artificial tooth 15 to which the magnet 7 is fixed is attached to a position opposed to the above, the artificial tooth 15 can be stably fixed to a correct position via the artificial tooth root 8 because the magnet 7 adsorbs the suction surface 6a of the head 1. .

As described above, in the artificial tooth root head 1 according to the present embodiment, the denture 1 in which the magnet 7 is fixed to the mucosal surface 18 is used.
5 can be easily mounted in the correct position. Moreover, since the denture 15 is detachable despite being fixed to the artificial tooth root 8, it can be used only when necessary, and can be easily removed when not necessary or when cleaning. Further, in the head 1, since the artificial root 8 can freely set the embedding position and the number of embedding, the optimum number can be provided and the denture can be fixed in the best state. In addition, since the magnet 1 is attached to the denture 15 and is not attached to the living body, the magnet is not affected by the human body and is safe. Further, an image obtained by an MRI-CT scanner (magnetic resonance imaging-computed tomography apparatus) is used. The diagnosis can be made without any trouble by removing the denture 15. Further, since the head 1 is detachably attached to the artificial root 8, maintenance such as repair or replacement of the head is easy.

FIGS. 3 and 4 show the artificial tooth root head 1 according to the second embodiment, in which a base 22 comprising a trapezoidal portion 21, a seat portion 3 and a male screw portion 4 is made of a magnetic material. The suction surface forming portion 23 is provided by casting to form the head 1.
In this case, if a hollow portion 21a is provided in the center of the upper surface of the trapezoidal portion 21 and an adsorption surface forming portion made of a magnetic material is cast in the hollow portion 21a and on the trapezoidal portion 21, the adsorption surface 6a Can be formed inclined in any direction. When the artificial tooth root 8 is not embedded vertically in the jawbone, for example, by setting the inclination direction of the suction surface 6a and casting, it is possible to obtain a uniform level of all the suction surfaces.

Therefore, in the present embodiment, the suction surface 6a of the suction surface forming portion can be formed to be inclined in an arbitrary direction. Therefore, when the artificial tooth root 8 is not buried vertically in the jawbone, the suction surface is formed. By casting while setting the inclination direction of 6a, uniform levelness of all the suction surfaces can be obtained, and thereby, a denture suitable for the user can be efficiently manufactured.

The embodiments of the present invention have been described above.
The specific configuration of the present invention is not limited to this embodiment, and any change in design or the like without departing from the spirit of the present invention is included in the present invention.

For example, in the embodiment, the head side portion 5 is formed in a regular octagon, but the present invention is not limited to this, and the head side portion may have any shape, such as a hexagon or a circular shape. Knurling or serration may be provided.

The material of the magnetic material is also arbitrary, and in essence, any material can be used as long as it does not easily corrode and is well absorbed by magnetic force.

[0022]

As described above, in the artificial tooth root head according to the first aspect of the present invention, since the above-mentioned configuration is adopted, the artificial tooth root is appropriately provided even if there is no natural tooth root. By attaching and adsorbing with a magnet provided on the mucosal surface side of the denture base, the denture can be detachably fixed, and the effect can be obtained such that the denture can be removed arbitrarily when unnecessary or during cleaning. In addition, since the magnet is attached to the denture, the human body is safe without being affected by magnetism.
-When performing image diagnosis using a CT scanner (magnetic resonance image-computed tomography apparatus), there is an effect that removal of dentures can be performed without any trouble. Further, since the head is detachably attached to the artificial tooth root, there is an effect that maintenance such as repair or replacement of the head is easy.

In the artificial tooth root head according to the second aspect, since the suction surface forming portion is formed by casting, the suction surface can be formed to be inclined in an arbitrary direction during casting. Therefore, in addition to the above effects, when the artificial tooth root is not buried vertically in the jaw bone, etc., by setting the inclination direction of the suction surface and casting, it is possible to obtain a uniform horizontality of all the suction surfaces. Thus, there is an effect that a denture suitable for the user can be efficiently manufactured.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a procedure for attaching a head of an artificial tooth root according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a head of the first embodiment.

FIG. 3 is a cross-sectional view showing a base portion of a second embodiment.

FIG. 4 is a cross-sectional view showing a mounted state of a head according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head 2 Side part 3 Seat part 4 Male screw part 6 Upper surface 6a Adsorption surface of head 7 Magnet 8 Artificial tooth root 9 Counterbore part 10 Female screw part 11 Screw groove 12 Mandible bone 14 Gingiva 15 Denture 16 Resin floor (denture base) 18 Mucosal surface 22 Base part 23 Suction surface forming part

Claims (2)

(57) [Claims] A rough artificial screw groove is formed on the inner peripheral surface of the jaw bone from the outside to the inner surface of the jaw bone to form a cylindrical artificial tooth jointed on the inner peripheral surface of the screw groove. A counterbore portion is opened at the head, a female screw portion having a smaller diameter is cut out at the bottom of the counterbore portion, and a male screw portion to be screwed with the female screw portion and a seat fitted to the counterbore portion. And a magnetic head composed of a side portion having a rectangular or knurled or serrated side surface, and fitted to the gingiva covering the outer peripheral surface of the jawbone on the inner side of a denture base having an artificial tooth outside. A magnet that fits into a recess formed in a portion of the mucosal surface that abuts the head, and that opposing surfaces of the magnet and the head have magnetic attraction. Adsorbs more closely, and the head can be attached to and detached from the artificial root A head for an artificial tooth root, characterized in that the head is formed in a shape. 2. The head according to claim 1, wherein the head is formed by a base portion and a suction surface forming portion made of a magnetic material, and the suction surface forming portion is fixed to an upper surface of the base portion by casting. A head for an artificial dental root as described in the above.