JP2000279428A - Tool for attaching dental magnetic members - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mutually arrange and fix respective keeper magnetic members in parallel with magnetic member holders fixed on a plurality of implants which are embedded in a jawbone by providing a keeper analog and a keeper setter or the like for holding the keeper magnetic members so as to be freely attachable/detachable. SOLUTION: When each keeper magnetic member 5 is arranged, a plurality of implants are embedded in a jawbone in a buccal cavity first and, then, the impression of three-dimensional arrangement in the opening part of the implant is obtained. Then an impression post is arranged in the upper part of the implant, the three-dimensional arrangement impression of the implant is obtained through the use of the post and an analog model 9 for a work is produced. A keeper alignment is decided from the model 9 and an index 12 is obtained. Then each magnetic member holder 3 is screwed on an implant analog 11, the keeper analog is put through an alignment cylinder body and, then, the keeper magnetic member 5 is arranged by using a keeper setter N.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a prosthesis such as a denture or a bridge to an implant embedded in a jawbone in a detachable manner. Also, the present invention relates to a dental magnetic member mounting device for mounting and fixing each magnetic member to a plurality of dental magnetic member holders in parallel with each other in a dental prosthesis system in which a magnet or a magnetic alloy is arranged face-to-face.

[0002]

2. Description of the Related Art In the restoration of teeth, in order to maintain a denture for restoration of an edentulous jaw or the like or a bridge for restoration of a partially defective portion in a mouth, a clip type is generally used. A method has been adopted in which an attachment is used or the above-mentioned prosthesis is cemented to an abutment tooth which has constituted a natural tooth with cement.

[0003] The former method is suitable for the patient to remove and clean the prosthesis on a daily basis, while the latter method does not basically allow the prosthesis to be removed, but provides a firm fixation. Becomes

[0004] Denture-type prostheses allow prostheses to reach soft tissue parts, and are therefore excellent in pronunciation, mastication, and aesthetics. However, unless a metal clasp (claw-like mechanism) is used in cases where residual teeth remain, it is necessary to rely on the support of soft tissue undercuts and adsorption of the denture to the mucosal surface. The bearing capacity depends on the shape of the ridge. Generally, when approaching the edentulous jaw, the alveolar projections that maintained the roots atrophy for disuse, the ridge was absorbed, and the supporting force of the denture was extremely reduced.

[0005] In addition, there is a type in which an implant is implanted and a denture type prosthesis is used, which is mechanically connected to an attachment such as an abutment fixed to the implant. Or coalesce with
There is no great difference in the supporting form from the fixed prosthesis fixed by screws. As a problem of this type of prosthesis, first, there is a problem that when the number of implants cannot be set large, stress applied to the implant becomes excessive, and as a result, loosening easily occurs in the implant. Second, a bar attachment in which the tops of a plurality of implants are connected by a metal bar and held by a clip placed on the mucosal surface of the denture has a problem in that it is difficult to clean the lower surface of the bar.

Therefore, in order to solve these problems,
A keeper magnetic member such as stainless steel is attached to an implant or the like, while a magnet is arranged in place of the clip on the mucosal surface of the denture, and a prosthetic form that holds the denture in a fixed position by a magnetic attraction between them is used. became. As such a prosthesis, for example, a bar that connects an implant with a keeper magnetic member made of a magnet or a magnetic alloy or a cover cap that is separately attached with a screw perpendicular to the implant, for example, titanium metal Attempts have been made to join a metal cap by casting a magnetic alloy with a low melting point gold alloy or the like, or to fix a keeper magnetic member with cement in a pocket recessed in the head of an implant.

[0007]

However, in the prosthesis using the above-mentioned magnetic alloy, it is difficult to set the joining surfaces of the keeper magnetic members completely parallel, so that a large stress is applied to the implant. Can cause serious problems such as bone resorption and loosening.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mounting device capable of mounting and fixing a keeper magnetic member with the fitting surfaces being completely parallel.

[0009]

In order to solve the above-mentioned problems, a mounting tool according to the present invention comprises a rod-shaped keeper analog inserted into each alignment cylinder held in parallel with each other by means of a conus device or the like, and attached to the tip thereof. The parallel relationship between the alignment cylinders obtained by engaging the magnetic member analogs provided in the holders for the respective magnetic members installed on the three-dimensional impression work table is fixed by means of an instant polymerization resin or the like. A magnetic member holder, in which a stick-shaped keeper setter is inserted into each alignment cylinder fixed in a mutually parallel shape and a magnetic member detachably held by means such as a magnet provided at the tip thereof, is mounted on an implant in the oral cavity. Characterized in that it is configured to be attached to

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, an implant 1 mounted with a holder for a magnetic member to which the mounting device of the present invention is applied will be described with reference to an assembled side view of FIG.

In the figures, 2 is an implant body to be buried in the jaw bone, 3 is a holder for a magnetic member projecting into the oral cavity for mounting an upper structure, 4 is a screw pin of a holder for a magnetic member, 5 is an upper part such as a denture or a bridge. It is a keeper magnetic member made of a magnet or a magnetic alloy so as to be attached to a magnetic member such as a magnet or a magnetic alloy attached to the prosthesis.

The implant main body 2 has a structure for self-tapping to a hole wall of a prepared hole drilled at a predetermined portion of a jaw bone with a special surgical instrument. That is, a male screw 2a is provided on the outer periphery, and a plurality of notches 2b are formed at the lower end of the outer periphery. The implant main body 2 is formed with a fitting hole 2d which is opened in the upper end surface 2c and provided in the axial direction.

A pocket 6 for fixing a keeper magnetic member 5 made of a magnetic alloy is formed at an upper end portion of the magnetic member holder 3. This pocket 6
Has a slightly larger shape so that the direction of the mating surface 5a of the keeper magnetic member 5 can be adjusted by inclining the keeper magnetic member 5 within a certain angle range, and the implant body 2 is oriented from a vertical axis to the occlusal plane. When fixed in a different manner or when implanting a plurality of implant bodies 2, the mating surface 5a of the keeper magnetic member 5 can be bonded and fixed at an optimal occlusal position.

Next, a method for mounting and fixing the keeper magnetic member 5 using the mounting device of the present invention will be described with reference to FIGS.

As a first step, a plurality of implants 1 are buried in the oral cavity and jaw bone B as shown in FIG. At this time, the screw-in type cap 3d is screwed from the upper end opening, and this state is maintained until the surrounding bone tissue is healed and the implant 1 is stably fixed.

As a second step, an impression of the three-dimensional arrangement of the opening of the implant 1 is taken, and an analog model 9 of the implant 1 is produced. 3 and 4 correspond to this stage.

After allowing the implant 1 to stand still and after a certain period of time confirming that the implant 1 has been stably fixed,
The cap 3d is removed, and the impression post 10 is placed above the implant 1 as shown in FIG. Thereafter, using the impression post 10, an impression of the three-dimensional arrangement of the implant 1 is collected by a conventional method.

Subsequently, as shown in FIG. 4, a working analog model 9 is manufactured from the impression by using an implant analog 11 in which the fitting hole 2d of the implant 1 is reproduced in shape. The manufactured analog model 9 is shown in FIGS.
Are faithfully reproduced from the three-dimensional relationship of the implant 1 shown in FIG.

As a third step, the keeper alignment is determined by the analog model 9 and the index 12 is determined.
Collect. 5 to 7 correspond to this.

First, the magnetic member holder 3 is screwed on the implant analog 11 as shown in FIG.

Next, as shown in FIG. 6, a keeper analog L having the tip of the rod-shaped body L1 conforming to the outer shape of the keeper magnetic member 5 is inserted into the alignment cylinder M. At this time, both are sized and shaped so as not to swing each other. Then, in this state, the tip of the keeper analog L is fitted into the pocket 6 of the magnetic member holder 3 to vertically hold all the keeper analog L. The alignment cylinders M are immediately fixed with the polymerization resin 13 in the vertical state, that is, in the mutually parallel state.

In order to vertically hold the keeper analog L, a conus device such as a conus parallel meter which is commercially available for dental techniques may be used.

Next, in order to use the alignment cylinder M thus fixed as a resin as the index 12, the keeper magnetic member 5 is tested with respect to the magnetic member holder 3 on the implant analog 11.

That is, as shown in FIG. 7, the rod N1 inserted into the alignment cylinder M is the keeper analog L.
Has the same shape as the rod-like body L1 and has a tip
A keeper setter N provided with a magnet N2 for holding the magnetic force of the magnetic member 5 is inserted through the alignment cylinder M. Then, it is confirmed whether or not the keeper magnetic member 5 can be fitted into the pocket 6 of the magnetic member holder 3 installed on the implant analog 11. At this time, since the alignment cylinders M are fixed in a parallel relationship in advance, the keeper magnetic members 5 are in a parallel relationship.

In the fourth stage, the keeper magnetic member 5 is fixed to the implant 1 using the index 12. 8 and 9 correspond to this stage.

First, as shown in FIG. 8, the magnetic member holder 3 is screwed onto the implant 1 fixed to the jaw bone B.
Next, as shown in FIG. 9, a proper amount of bone cement 14 is filled in the pocket 6 of the holder 3 for the magnetic member, and the indexer 12 and the keeper setter N hold the keeper magnetic member 5 in the pocket while maintaining the mutual parallel relationship. 6 and detached from the keeper setter N. After a lapse of time, the bone cement 14 hardens, and the keeper magnetic members 5 are fixed in parallel with each other.

The embodiment of the present invention has been described with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and may take any form without departing from the object of the invention. Needless to say.

[0029]

As described above, according to the present invention, each of the keeper magnets can be fixed to a magnetic member holder fixed on a plurality of implants embedded in the jawbone by a very simple configuration, mechanism and method. The members can be mounted and fixed parallel to each other. Therefore, no large stress is applied to the implant, and no bone resorption or loosening occurs.

[Brief description of the drawings]

FIG. 1 is a partial cutaway view of a dental magnetic member holder to which the attachment device of the present embodiment is applied and an implant holding the holder.

FIG. 2 is an explanatory view showing a state where a plurality of implants of FIG. 1 are installed in an oral cavity.

FIG. 3 is an explanatory view showing a state where an impression post is implanted in the implant of FIG. 2;

FIG. 4 is an explanatory view showing a state of a working analog model using an implant analog.

FIG. 5 is an explanatory view showing a state in which a keeper holder is mounted on the analog model of FIG. 4;

FIG. 6 is an explanatory diagram showing a state of keeper alignment determination and index acquisition using the mounting device of the present embodiment.

FIG. 7 is an explanatory view showing a state in which the fitting of the present embodiment is used to test the magnetic member using the index of FIG. 6;

FIG. 8 is an explanatory view showing a state in which a keeper holder is attached to an implant in the oral cavity for installing a magnetic member.

9 is an explanatory view showing a state in which a magnetic member is mounted and fixed to the keeper holder of FIG. 8 using the index of FIG. 6 by the mounting tool of the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dental implant 2 Implant main body 3 Dental magnetic member holder 4 Screw pin 5 Magnetic member 6 Pocket 2a Male screw 2b Notch 2c Upper surface 2d Fitting hole 3d Cap 5a Joining surface 9 Analog model 10 Impression post 11 Implant analog 12 Index 13 Immediate polymerization resin 14 Bone cement L Keeper analog M Alignment cylinder N Keeper setter L1, N1 Rod

Claims (1)

[Claims] 1. A magnetic member holder comprising: a magnetic member holder for fixing an upper structure such as a denture or a bridge in a mouth using a magnetic force so as to be removably attached to a plurality of implants embedded in a jaw bone; A mounting device for fixing members in parallel with each other, wherein a keeper analog that forms a rod-like body is inserted into each alignment cylinder held in parallel with each other by means of a conus device or the like, and the magnetic member analog provided at the tip is three-dimensionally mounted. After fixing the parallel relationship between the alignment cylinders obtained by engaging the holders for the magnetic members installed on the impression work table by means of an instant polymerization resin or the like, each of the above fixed parallel to each other is fixed. Insert a stick-shaped keeper setter into the alignment cylinder, and hold the magnetic member detachably held by means such as a magnet provided at the tip of the keeper on the implant in the oral cavity. Dental magnetic member mounting device comprising configured for mounting to the mounting the magnetic member in the holder.