JPH10192303A - Keeper for artificial tooth attachment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent loosening and seizure by long-term use and to easily take out a keeper main body by providing a projection part for covering the upper end face of a screw member to be screwed to the center part of the keeper main body and attachably and detachably screwing and fixing the keeper main body to a case. SOLUTION: This keeper is constituted of the soft magnetic keeper main body 2 in a thin plate shape and the case 3 to which it is attachably and detachably screwed and fixed. A maintenance bar is joined to the side face of the case 3. A screw hole 21 is opened at the center part of the keeper main body 2, the screw member 22 is screwed and it is screwed to the case 3. The projection part 23 is provided so as to cover the upper end face of the screw member 22. The keeper main body 2 is formed into a rectangular shape by a soft magnetic body and an inclined part 25 lowered from a back surface to an outer direction is provided. The screw member 22 is provided with a groove 24 for a driver. By removing the projection part 23 by a small-sized grinder device or the like and releasing the screwing of the screw member 22, the keeper main body 2 is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keeper which is used in the field of dentistry and is a component of a denture attachment utilizing magnetic attraction, and which is fixed to a root plate. .

[0002]

2. Description of the Related Art Conventionally, a keeper 10, which is one element of a denture attachment utilizing magnetic attraction, is usually fixed to a root plate 101 by casting. As shown in FIG. 3, a root plate 101 is buried in the root portion 102, and a keeper 10 is further buried above the root plate 101. In order to restore the root 102, the keeper 10 restores the remaining root 10
(2) The magnetic material (1) is cast into the root plate (101) embedded in the upper part.
03 is adsorbed in the denture base 104 in which the denture 105 is embedded, and plays a role of fixing the denture 105.

In the keeper, as shown in FIG. 3, a keeper 10 is tightly fixed on an upper portion of the root plate 101, and it is difficult to remove only the keeper 10 from the root plate 101. The keeper 10 is a keeper 1
0 itself is made of a magnetic material, which may affect the measurement obtained by MRI when diagnosing a brain or the like by MRI (nuclear magnetic resonance), for example, there is a possibility that an MRI image may be deformed. Was. Therefore, several structures have been proposed in which the keeper 10 can be detached from the root plate 101.

For example, as shown in FIG. 4, a denture stabilizing root member 20 proposed in Japanese Patent Laid-Open Publication No. Hei 5-10379 first has a concave hole 201 at an end of the root member 20.
A female screw 202 is provided on the inner peripheral surface of the concave hole 201. Next, on the outer peripheral surface of the holding plate 203 (referred to as a keeper in the present invention), a male screw 204 screwed with the female screw 202 is provided.
Is provided. With the above configuration, until the holding plate 203 shown in FIG.
4 and a female screw 202.

[0005]

However, the conventional keeper described above has the following problems. That is, in Japanese Patent Application Laid-Open No. Hei 5-10379, the holding plate is made detachable from the root member by using the action of the screw, but the holding plate provided with the screw on the outer peripheral surface is held in the denture base. The attracting surface to be attracted to the magnet body is exposed in the oral cavity, and if used for a long time, inconveniences such as loosening and seizure of the screw may occur.

The present invention has been made in view of the above-mentioned conventional problems, and when the screw is not loosened or seized even when used for a long time, or when there is a possibility that the magnetic characteristics such as the use of MRI may be affected, the keeper is moved from the base plate. An object of the present invention is to provide a keeper for a denture attachment that can be easily taken out.

[0007]

Means for Solving the Problems The present invention is an element constituting a denture attachment, which is attached to a magnetic body held in a denture base and fixed to a root plate embedded in a root portion. A plate-shaped keeper main body having a main surface as an adsorption surface adsorbed by a magnetic body, a case having a C-shaped cross section having an inner surface symmetrical with a side peripheral surface excluding the main surface of the keeper main body; A keeper comprising a maintenance rod integrally fixed to a side surface, wherein the keeper body covers a screw hole opened at a central portion thereof and an upper end surface of a screw member screwed into the screw hole. A keeper for an artificial tooth attachment, wherein the keeper body is provided with a protrusion to be attached to the case, and the keeper body is detachably screwed and fixed to the case.

That is, the keeper of the present invention comprises a keeper main body, a case, and a maintenance rod. The keeper body is made of a soft magnetic material, and has a screw hole opened at the center thereof and a projection covering an upper end surface of a screw member screwed into the screw hole. Further, the keeper body and the case are screwed and fixed by using the screw member, and the upper end surface of the screw member is provided with the protrusion to prevent the upper end surface of the screw member from being exposed in the oral cavity. I have. The case has a C-shaped cross section having an inner surface symmetrical with the side peripheral surface excluding the main surface of the keeper body, and holds the keeper body detachably. The maintenance rod is a rod-shaped member and is joined to the side surface of the case. Therefore, when the keeper is fixed to the root plate, it can be surely fixed to a predetermined position in the mold.

Next, the operation of the present invention will be described. The keeper of the present invention does not join the keeper body and the case having a C-shaped cross section having an inner surface symmetrical with the side peripheral surface excluding the main surface of the keeper body, and has a screw hole opened at the center of the keeper body. And a screw member having a shape complementary to the screw hole is screwed and fixed, and the keeper body is made detachable from a case made of a non-magnetic material. For this reason, when it is necessary to take out the keeper made of a magnetic material from the root plate in MRI photography or the like, the keeper body, which is a component of the keeper, can be easily removed from the case. That is, after breaking and removing the protrusion provided on the upper end surface of the screw member for screwing and fixing the keeper body, using a screwdriver, a predetermined screwdriver is inserted into a groove formed on the upper end surface of the screw member. The keeper body can be inserted and turned in a predetermined direction so that the keeper body floats above the case, and the keeper body can be mechanically removed from the case.

The keeper body is preferably made of a soft magnetic material. Such soft magnetic materials include 19Cr
-2Mo-Ti steel, 13Cr-2Mo-Ti steel, 15C
There are r-2Mo-Ti steel, 17Cr-2Mo-Ti steel, pure iron and the like.

Preferably, the case uses a non-magnetic material. Such non-magnetic materials include SUS316
L, SUS304, Ti, Ti alloy, dental materials and the like. The case is formed into a shape having desired dimensions by pressing.

The screw member is preferably made of the same material as the keeper body or a non-same material as the keeper body, depending on the structure of the magnetic material that is attracted to the keeper.

It is preferable that the protruding portion is made of the same material as that of the keeper body, and is made of a soft magnetic material. Such soft magnetic materials include 19Cr-2Mo-Ti steel, 13
There are Cr-2Mo-Ti steel, 17Cr-2Mo-Ti steel, pure iron and the like. When the projection is provided on the upper end surface of the screw member, it is preferable to provide a gap between the protrusion and the upper end surface. By providing the gap, the groove formed on the upper end surface is not buried.

[0014] The maintenance rod is preferably made of non-magnetic stainless steel, Ti alloy or dental alloy having corrosion resistance and excellent bending operability. For example,
SUS316L, Ti alloy, 17Cr-12Ni-2M
o.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a keeper for a denture attachment according to the present invention. Embodiment A keeper for a denture attachment according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view of a main part, and FIG. 2 is a developed sectional view showing a state in which a keeper body is removed. As shown in FIG. 1, a keeper 1 for a denture attachment according to the present embodiment includes a thin plate-shaped keeper body 2, a case 3 for holding the keeper body 2,
And a maintenance rod 4 joined to the side surface of the case 3. The keeper body 2 has a screw hole 21 opened at the center thereof and a screw member 2 screwed into the screw hole 21.
2 is provided with a projection 23 covering the upper end surface.

The keeper body 2 is made of a soft magnetic material, has a rectangular shape, and has an inclined portion 25 descending outward from a back surface (a surface that does not attract the magnetic material) opposite to the main surface. Is provided. The screw member 22
Is made of the same material as the keeper body 2,
1 has a shape complementary to that of FIG.
Are formed. In the present embodiment, the groove 24 is for a minus (minus) driver, but may be for a plus (plus) driver.

The case 3 is made of a non-magnetic material, and is formed by pressing into a C-shaped cross section having an inner surface symmetrical with the side peripheral surface excluding the main surface of the keeper body 2 and holding the keeper body 2. I do. At this time, the keeper body 2
Since the screw member 22 is screwed and fixed to the case 3, the case 3 and the keeper body 2 are not joined. Also, Keeper 1
When the is fixed to the root plate 5, the retaining rod 4 for fixing in the mold is joined to the side surface of the case 3 so that it can be securely fixed to a predetermined position in the mold.

When removing the keeper body 2, FIG.
As shown in (1), first, the projection 23 covering the upper end surface of the screw member 22 is hit with a small grinder device or the like to be removed. Next, by removing the projection 23, the upper end surface of the screw member 22 appears, and a minus (-) screwdriver is inserted into the groove 24 formed on the upper end surface,
Rotate in a predetermined direction. Then, the keeper body 2 floats by the mechanical force of the screw, and the keeper body 2 can be removed from the case 3. Since there is a gap between the protrusion 23 and the upper end surface of the screw member 22, a method of crushing, crushing, or cutting can be used as a means for removing the protrusion 23 in addition to the above. In this manner, the keeper body 2 can be relatively easily taken out of the case 3, so that no major obstacle is caused during MRI imaging or the like.

[0019]

As described above, according to the present invention, when the keeper body is screwed and fixed to the case using the screw member, the upper end surface of the screw member is not exposed in the mouth and vagina, so that the screw can be used for a long time. It does not loosen or seize, it can maintain a predetermined holding force when the denture base is attached, and when there is a possibility that the magnetic characteristics such as the use of MRI may be affected, the keeper body can be easily removed. A removable denture attachment keeper can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a developed sectional view showing a state in which a keeper body is removed in the embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a main part showing a conventional example.

FIG. 4 is a cross-sectional view schematically showing a state in which a root plate shown as a reference example is fixed to a tooth root and a denture is adsorbed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Keeper 2 ... Keeper main body 3 ... Case 4 ... Maintenance rod 5 ... Root plate 21 ... Screw hole 22 ... Screw member 23 ... Projection part 24 ... Groove 25 ... Slope

Claims (1)

[Claims] An attraction surface, which is an element constituting a denture attachment, is attracted to a magnetic material held in a denture base, is fixed to a root plate embedded in a root portion, and is attracted to the magnetic material. A keeper body having a main surface as a main body, a case having a C-shaped cross section having an inner surface symmetrical with the side peripheral surface excluding the main surface of the keeper body, and one end integrally fixed to a side surface of the case. A keeper comprising a maintenance rod, wherein the keeper body has a screw hole opening in the center thereof,
And a projection for covering an upper end surface of a screw member screwed into the screw hole, and the keeper body is detachably screwed and fixed to the case.