JP2001340358A - Magnetic attachment for denture and its assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a dental magnetic attachment the adsorbent of which can be attached easily and surely to an underming part of an abutment tooth. SOLUTION: In this magnetic attachment for denture in which a denture mounted with a magnet structure which is constituted by sealing a magnet with a structure having a required material and structure and the adsorbent installed to the abutment tooth by utilizing the magnetic attracting force between the adsorbent and magnet structure, the adsorbent is composed of an adsorbing surface for the magnet structure and a post part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic attachment of a denture maintenance device utilizing the magnetic force of a magnet among devices used for dental repair and prosthesis, and more particularly, to a magnetic attachment adsorbent. .

[0002]

2. Description of the Related Art There are various methods for maintaining a denture in the field of dentistry, such as a fixing method using a crown, a bridge, cement, or the like, and a denture with mechanical force, such as a method having these removable parts. Have been used. However, in recent years, with the development of high-performance magnets,
It has become possible to manufacture a magnet having a strong magnetic force even with a small size, and it has been applied to a denture maintenance device, and has gained many clinical results as a magnetic attachment for a denture.

[0003] A magnetic attachment for a denture comprises a magnet structure mounted on the denture side and an adsorbent mounted on the gingival side, and is detachable by a magnetic attraction force generated between the magnet structure and the adsorbent. It is assumed that. FIG. 4 shows a method of mounting the denture 1a using a conventional magnetic attachment. FIG. 5 shows a cross section of the magnet structure. The magnet structure 1 is mounted on the resin floor 6 of the denture 1a using resin cement. Meanwhile, the patient's abutment 4
A root plate 3 made of gold, silver alloy, or the like is bonded with resin cement, and an adsorbent 2 is buried above the root plate 3. The burying of the adsorbent body 2 is performed by insert molding by centrifugal pressure casting or the like at the time of producing the root face plate 3, and the adsorbent body 2 is fixed to the root face plate 3 with a strong maintenance force. With the above-described configuration, when the denture 1a is used, the denture 1a is fixed by the magnetic attraction between the ferromagnetic adsorbent 2 installed on the abutment tooth 4 and the magnet structure 1 and becomes unnecessary. The denture 1a can be separated.

[0004]

Since the magnetic attachment for the denture is maintained only by the magnetic attraction force without using the frictional force or the elastic force, the denture does not exert an excessive force on the abutment tooth when the denture is attached or detached. In addition to being easy to install and remove, the holding force acts in the direction perpendicular to the magnet structure and the suction surface of the suction body.
It has the effect of relieving lateral force and rotational force on the suction surface, and has many advantages such as reducing discomfort when the denture is worn. However, the attachment of the magnetic attachment to the denture and the abutment is not easy, and a skilled technique is required. In particular, it is difficult to manufacture the root plate necessary for the abutment and bury the adsorbent in the root plate. .

Further, when the adsorbent 2 is buried in the root plate 3, a root plate forming material such as gold or silver alloy is melted at a temperature equal to or higher than the melting point of each alloy, and the adsorbent is gripped in a plaster mold or the like. When the adsorbent is buried in the root plate by casting, the manufacturing process becomes complicated and requires not only skilled technical work but also various equipment investments, a large amount of work time, and a cost for the patient. Further, sufficient accuracy cannot be obtained in the above-described manufacturing process, and therefore, a finishing process may be added.

[0006] As described above, in the method of embedding the adsorbent by pouring a root plate material heated to a high temperature, the adsorbent is heated to a high temperature, and the thermal effect exerts the optimum magnetic characteristics of the adsorbent itself. This may cause difficulty, deformation of the adsorbent due to casting stress of the root plate, and casting defects in which a gap is formed at the boundary between the adsorbent and the root plate. These problems reduce the suction force of the magnetic attachment and promote the occurrence of crevice corrosion in the oral environment.

[0007] Further, in preparing the root plate, it is necessary to perform a patient under a clinician equipped with equipment for pretreatment for forming a root surface on an abutment tooth, etc. However, it is difficult to apply to patients who want to be treated. In addition, the time required for the treatment is long, which imposes a great deal of time and money on the patient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a flat plate-like shape or a similar shape so that the adsorbent is directly mounted on an abutment tooth without embedding an adsorbent constituting a magnetic attachment in a root plate. By laying the post part on one surface of the body and making the post part tapered and having a groove on the circumference of its outer peripheral surface, the adsorbent is easily and securely attached to the abutment tooth digging part by bonding It is an object of the present invention to obtain a dental magnetic attachment that can be used.

[0009]

The above object is achieved by providing a dental magnetic attachment according to the present invention described below. Hereinafter, the solution will be described in detail. That is, the magnetic attachment of the present invention is a magnetic attachment for a denture used for a dental prosthesis comprising a magnet structure fixed to a denture and a magnetic metal fixed to an abutment tooth as an adsorbent, The attachment has a post portion on the adsorbent.

[0010] Further, since the adsorbent fixed to the abutment tooth has the post portion, it can be easily mounted on the abutment tooth in a hole previously drilled by a diamond bar or the like.
In addition, the bonding area related to the bonding force can be increased, and the adsorbent can be securely bonded and fixed in the abutment tooth.

Since the adsorbent is made of an alloy such as ferritic stainless steel, the adsorbent exerts an attractive force with the magnet structure, so that the material can be easily procured at low cost, and the oral cavity can be obtained. It can withstand the environment enough. The ferritic stainless steel has been heat treated to show optimal magnetism. Therefore, since there is no influence of heat, there is an advantage that the magnetic characteristics do not deteriorate.

Since the attraction body is composed of an attraction plate that attracts to the magnet structure and a tapered post portion, the work process of mounting the attraction body on the abutment becomes easier. In addition, the strength and reliability of bonding with the resin cement can be easily obtained.

[0013] By providing a plurality of grooves on the outer periphery of the post portion of the adsorbent, the grooves act as an anchor for the adhering surface on the adhering surface between the adsorber and the abutment tooth, thereby improving the bonding safety. Can be enhanced. When the length of the post portion is longer than the length of the hole dug in the abutment tooth, the arrangement of a plurality of grooves on the tapered surface is used as a dimension gauge and cut from the groove portion. The length of the post can be adjusted.

By using the means of the present invention, it is not necessary to form a root plate which requires a complicated process and a large amount of time in the related art.
When attaching the post-attached adsorbent of the magnetic attachment for the denture to the abutment, it can be easily and securely attached, and can be adapted to home medical treatment.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a basic embodiment of a magnetic attachment for a denture according to the present invention. The magnetic attachment of the present invention has a denture 1a as shown in FIG.
And an adsorbent 2a attached to the abutment 4 of the patient. The magnet structure 1 is attached to the denture 1a using resin cement as usual,
The adsorbent 2a is mounted on the abutment tooth 4 using resin cement.

FIG. 5 shows a sectional structure of the magnet structure 1. The magnet structure 1 has a cylindrical shape, and in this embodiment, has a diameter of 2.
5, 3.0, 3.5, 4.0, 4.5mm and 1.3mm thickness shall be used. The magnet body 1 is sealed in the magnet structure 1 by the following various stainless steel structures.
The magnet structure 1 has an attraction surface 13 and a non-attraction surface 14, and the attraction surface
13 is composed of a magnetic stainless steel cup yoke 9 and a sealed disk 10, and a non-magnetic stainless steel sealed ring 11, so that the suction body 2a attached to the abutment teeth and the suction body 2a are attracted and a maximum suction force is developed. Joined by laser welding. A groove 12 is provided on the outer peripheral surface of the cup yoke 9 for the purpose of increasing the adhesive force. Non-adsorbing surface of magnet structure 1
Numeral 14 is a surface of only the cup yoke 9, and all magnetic flux from the magnet body 8 enters the lower adsorbent 2a, and there is no magnetic flux leaking from the non-adsorbing surface 14, so that there is no magnetic attractive force to the outside. do not do. This non-sucking surface 14 is attached to the artificial tooth 5 side of the denture.

FIG. 2 is a diagram showing the structure of the adsorbent 2a.
The suction plate 15 of the suction body 2a has a thickness of 0.8 mm and is used in combination with the same size as the diameter of the magnet structure 1. The attraction surface 18 of the attraction plate 15 that attracts the magnet structure 1 is a flat surface,
On the opposite non-suction surface 19, a tapered post 16 is formed concentrically with the suction plate 15. The suction plate 15 and the post 16 are made of magnetic stainless steel with an integral structure.

The post 16 has a tapered shape, and its maximum diameter is 2.0 mm when it comes into contact with the suction plate 15, and the minimum diameter at the end of the post having a length of 5.0 mm is 1.0 mm. On the outer circumference of the tapered surface, a groove 17 having a width of 0.2 mm and a depth of 0.1 mm is cut in the length direction at a pitch of 1 mm on the circumference. Each of these dimensions can be arbitrarily set depending on the size of the abutment for maintaining the denture.

FIG. 3 is a diagram showing an outline of how to attach the magnet structure 1 to the denture 1a and how to attach the adsorbent 2a to the abutment teeth 4. The abutment 4 for maintaining the denture 1a is dug in advance with a largovar to remove a tooth nerve, and the root canal 4a is closed with a predetermined root canal filler. To further improve the clearance between the adsorbent 2a and the abutment tooth, use a diamond bar of the same shape as the adsorbent 2a.
Drill a hole 4b in 4. It is important that the hole formed by the diamond bar is in contact with the adsorbing plate 15 of the adsorbent 2a, so that it is not unnecessarily large in diameter, and that it is in smooth contact with the non-adsorbing surface 19 of the adsorbing plate 15. Do it.

After the adsorbent 2a is once attached to the hole 4b drilled in the abutment tooth 4 and the gap is confirmed, resin cement is attached to the outer peripheral surface of the adsorbent 2a excluding the adsorbing surface 18 and the inner surface of the abutment tooth 4. And apply
Immediately attach the adsorbent 2a into the abutment 4 and remove the resin cement that has protruded from the mating surface between the abutment 4 and the adsorbent 2a.
Hold for a predetermined curing time.

When attaching the magnet structure 1 to the denture 1a, a hole 1b for attaching the magnet structure 1 to the denture 1a is made in advance. First, the attraction surface 13 of the magnet structure 1 is attracted onto the attraction surface 18 of the attraction body 2a attached to the abutment tooth 4. Next, a predetermined amount of resin cement is inserted into the hole 1b formed in the denture 1a, and the magnet structure 1 is immediately inserted into the hole of the denture 1a simultaneously with the mounting of the denture in the oral cavity. By this series of operations, the magnet structure 1 and the adsorbent 2a fixed to the abutment tooth 4
There is no displacement, and both the abutment tooth 4 and the denture 1a can be accurately fixed. In addition, this means is convenient because there is no operation for forming the root plate 3 on the clinical side, and home treatment can be sufficiently performed.

[0022]

As described above, according to the magnetic attachment for a denture of the present invention, it is apparent that the following effects are obtained. (1) A magnetic attachment for a denture can be obtained by attaching a post portion to the attracting body of the magnetic attachment. (2) By attaching a post to the adsorbent, it is no longer necessary to form a root plate using a conventional gold or silver alloy, and the adsorbent can be fixed directly to the abutment tooth with an adhesive resin, thereby reducing the number of treatment steps. Reduction, reduction of patient burden cost, and home treatment can be enabled. (3) Since there is no conventional root plate using gold and silver alloys, the magnetic characteristics of the adsorbent and the magnetic attraction force with the magnet structure are optimized without causing casting stress or thermal effects on the adsorbent. can do. (4) By making the post part of the adsorbent tapered, the attachment of the adsorbent to the abutment tooth can be facilitated. (5) By providing a groove on the circumference of the outer periphery of the post portion of the adsorbent, the adhesive strength between the adsorbent and the abutment tooth is improved. Also, by providing a plurality of grooves on the circumference of the post part at equal pitches, it can be applied as a length gauge, and the length of the post part can be adjusted according to the depth of the hole dug in the abutment tooth. Cut,
Can be adjusted.

[Brief description of the drawings]

FIG. 1 shows an example of an embodiment according to the present invention.

FIG. 2 is an adsorbent of a magnetic attachment for a denture according to the present invention.

FIG. 3 shows a method of mounting a magnetic attachment for a denture according to the present invention.

FIG. 4 shows an example of the prior art.

FIG. 5 is a prior art magnet structure.

[Explanation of symbols]

1 magnet structure, 1a denture, 1b hole, 2 adsorbent, 2a
Adsorbent (with post), 3 root plate, 4 abutment tooth (root),
4a root canal, 4b borehole, 5 artificial teeth, 6 resin floor, 7
Gum, 8 magnet body, 9 cup yoke, 10 shield disk, 11 shield ring, 12 groove, 13 suction surface, 14
Non-suction surface, 15 suction plate, 16 post, 17 groove, 18
Suction surface, 19 non-suction surface

Claims (8)

[Claims] 1. A denture with a magnet structure in which a magnet is sealed with a structure having a required material and structure, and a magnetic attraction force between an attraction body installed on an abutment tooth and the magnet structure. The magnetic attachment for a denture according to any one of the preceding claims, wherein the adsorbent comprises a post surface and an attraction surface with a magnet structure. 2. The denture according to claim 1, wherein the adsorbent has corrosion resistance in an oral environment, has a property not to exhibit a biological tissue reaction or cytotoxicity, and has magnetism. Magnetic attachment. 3. The magnetic attachment for a denture according to claim 2, wherein the adsorbent is an alloy such as ferritic stainless steel. 4. The magnetic attachment for a denture according to claim 1, wherein a means for preventing the post from falling off from the abutment tooth is provided on an outer periphery of the post portion of the adsorbent. 5. The magnetic attachment for a denture according to claim 4, wherein the post portion of the attraction body comprises an attraction plate engaged with the abutment tooth and a tapered portion. 6. The method according to claim 4, wherein
A magnetic attachment for a denture, wherein the suction plate of the suction body is closely engaged with the abutment tooth so that no foreign matter enters the inside of the abutment tooth. 7. The denture according to claim 5, wherein a plurality of grooves are provided in the post portion of the suction pair, and a function of a gauge indicating the height of the post portion is provided as necessary. Magnetic attachment. 8. A denture with a magnet structure in which a magnet is sealed with a structure having a required material and structure, and a magnet attraction attached to an abutment mounted on an abutment tooth and the magnet structure can be attached to and detached from the magnet structure. In the magnetic attachment for dental prosthesis described above, after the adsorbent is first attached to the hole dug in the abutment, the magnet structure is attracted to the attraction surface of the adsorbent, and then provided on the denture side. A method for assembling a magnetic attachment for a denture, wherein a step of mounting the magnet structure with resin cement in a mounting hole of the magnet structure and integrating the magnet structure with a denture is performed.