JP3652873B2 - Dental magnetic material holder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, an upper prosthesis such as a denture or a bridge is detachably attached to an implant embedded in a jawbone. Therefore, a magnet is provided on either the implant side or the upper prosthesis side, and a magnet or a magnetic alloy is provided on the other side. It is related with the holder for dental magnetic members fixed to the upper end of an implant main body in order to hold | maintain a keeper magnetic member in the dental prosthesis system which arrange | positions a face-to-face.
[0002]
[Prior art]
In the restoration of dental prosthesis, in order to maintain a denture when prosthetics such as an edentulous jaw and a bridge when repairing a partial defect in the oral cavity, in general, a clip type attachment is used, Alternatively, a method has been used in which the above-mentioned prosthesis is cemented to an abutment tooth that has formed a natural tooth.
[0003]
The former method is suitable for the patient to remove and clean the prosthesis on a daily basis, while the latter allows for a strong fixation, although the prosthesis cannot basically be removed.
[0004]
Since denture type prosthesis can be prosthetic up to the soft tissue part, it has excellent pronunciation, chewing and aesthetic aspects. However, unless a metal clasp (claw-like mechanism) is used in cases where residual teeth remain, it is necessary to rely on support for soft tissue undercutting and adsorption to the mucosal surface of the denture. Since it is not possible, the supporting force depends on the shape of the ridge. In general, when approaching the edentulous jaw, the alveolar projection that maintained the roots was disused and atrophy was absorbed, and the support force of the denture was extremely reduced.
[0005]
In addition, implants and denture-type prostheses were used, which were mechanically connected to attachments such as abutments fixed to the implants. However, the fixed prosthesis fixed with screws is not much different as a support form. As a problem of this type of prosthesis, firstly, when the number of implants cannot be set large, the stress applied to the implant becomes excessive, and as a result, there is a problem that loosening is likely to occur in the implant. Secondly, in the bar attachment in which the tops of a plurality of implants are connected by a metal bar and held by a clip installed on the denture mucosa, there is a problem that it is difficult to clean the lower surface of the bar.
[0006]
Therefore, in order to solve these problems, a keeper magnetic member such as stainless steel is attached to an implant or the like, and on the other hand, a magnet is arranged on the denture mucosa instead of the above clip, and the denture is determined by an attractive force due to the magnetic force therebetween. A prosthetic form that is held in position has been used. As such a prosthesis, for example, a metal keeper made of a magnet or a magnetic alloy is cast into a bar connecting the implant, or a cover cap attached with a screw perpendicular to the implant separately, for example, titanium metal There have been attempts to join a cap made by casting a magnetic alloy, such as a gold alloy having a low melting point, or a cemented keeper magnetic member in a pocket recessed in the head of the implant.
[0007]
[Problems to be solved by the invention]
However, in the prosthesis using the above-described magnetic alloy, it is difficult to set the joining surface of the keeper magnetic member completely in parallel, which causes a large stress on the implant, which causes serious problems such as bone resorption and loosening. Could cause serious problems. In addition, since the keeper magnetic member is not flexible, the occurrence of artifacts has become a problem when diagnosing lesions in the craniofacial region by MRI or the like. Therefore, in view of the above, the present invention sets the keeper joining surface in the optimum direction when the implant body is fixed in a different direction from the vertical axis with respect to the occlusal plane, or when implanting a plurality of implant bodies. The keeper magnetic member is adhesively fixed to the pocket at a proper occlusal position, and the keeper magnetic member can be easily removed as needed, for example, when diagnosing a lesion in the craniofacial region by MRI or the like. It is an object of the present invention to make it possible to avoid the occurrence of artifacts during diagnosis.
[0008]
[Means for Solving the Problems]
The implant member of the present invention for solving the above problems is a magnetic member fixed on an implant embedded in the jawbone so that an upper prosthesis such as a denture or a bridge can be detachably mounted in the oral cavity using magnetic force. And a keeper magnetic member fitted to the magnetic member holder, wherein the magnetic member holder is formed with a pocket having a spherical wall peripheral surface at the upper end, The keeper magnetic member has a shape in which a part of a sphere is cut into a ring shape, has a spherical side surface corresponding to the wall peripheral surface of the pocket, and the side surface is brought into contact with the wall peripheral surface to form the pocket. A filling space for filling the adhesive is provided below the keeper magnetic member in the fitted state, and the key is placed in the pocket at an optimal occlusion position. Characterized in that the over magnetic member so as to adhesively fixed.
[0009]
Furthermore, the implant member of the present invention includes a magnetic member holder fixed on an implant embedded in the jawbone so that an upper prosthesis such as a denture or a bridge can be detachably mounted in the oral cavity using magnetic force, and the magnetic member holder. A keeper magnetic member fitted to the member holder, and a fixing screw for rotatably fixing the keeper magnetic member to the magnetic member holder, the magnetic member holder having a spherical wall circumference A pocket having a surface is formed at the upper end portion, a screw hole is formed downward from the bottom surface of the pocket, and the thickness of the vicinity of the upper end of the pocket gradually decreases toward the upper end. The keeper has a shape in which a part of the sphere is cut out in a ring shape, and the keeper magnetic member has a shape in which a part of the sphere is cut out in a ring shape. A through-hole having a spherical side surface corresponding to the upper surface and penetrating from the upper surface to the lower surface and having a spherical wall peripheral surface at the upper portion is formed, and the spherical wall peripheral surface corresponds to the side surface of the head of the fixing screw. It has a spherical shape, and the side surface abuts against the wall peripheral surface of the pocket, and the spherical wall peripheral surface abuts against the side surface of the head of the fixing screw and is pivotally fitted to the pocket so as to be optimally engaged. The keeper magnetic member is screwed and fixed to the pocket at a position .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
1 and 2 are an exploded side view and an assembled side view, respectively, of a dental implant 1 on which a holder for a dental magnetic member of the present invention is mounted. 2 is an implant body embedded in a jawbone, and 3 is for attaching an upper structure. A holder for a dental magnetic member protruding into the oral cavity, 4 is a screw for connecting the implant body 2 and the dental magnetic member holder 3, and 5 is a magnet or a magnetic alloy attached to the upper prosthesis C 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 fitted onto the magnetic member 5 '. FIG. 2 is a side view of the dental implant 1 shown in FIG.
[0012]
The implant body 2 has a structure for self-tapping a hole wall of a prepared hole drilled with a dedicated surgical instrument at a predetermined site of the jawbone. That is, a male screw 2a is provided on the outer periphery, and a plurality of notches 2b are formed on the lower end of the outer periphery. Further, as shown in FIG. 2, the implant body 2 is formed with a fitting hole 2 d that opens in the upper end surface 2 c and is provided in the axial direction.
[0013]
The holder 3 for the dental magnetic member has a lower portion which is a small-diameter fitting portion 3a for fitting into the fitting hole 2d of the implant body 2, and a polygonal portion 3b at the lower end thereof to prevent rotation. ing. Although not clearly shown in the drawing, the fitting hole 2d of the implant body 2 has a corresponding shape. As an advantage of using such a polygonal structure, the position in the oral cavity can be transferred as it is by connecting the dental magnetic member holder 3 to the implant body 2 in a state of preventing rotation and using an appropriate impression member. It is possible to prepare an oral shape model made of gypsum or the like and fix the keeper magnetic member 5 to the dental magnetic member holder 3 on the model.
[0014]
As shown in FIG. 2, the dental magnetic member holder 3 is provided with an axial through hole 3 c for connecting the implant body 2 and the dental magnetic member holder 3 with the screw 4, and a magnetic alloy is formed at the upper end portion thereof. A pocket 6 for fixing the keeper magnetic member 5 is formed. The pocket 6 has a shape obtained by cutting a part of a sphere into a ring shape, and thus includes a spherical wall peripheral surface 6a. On the other hand, the keeper magnetic member 5 also has a shape obtained by cutting out a part of the same sphere in a ring shape, and its side surface has a spherical shape corresponding to the wall peripheral surface 6a, and is bonded to bone cement or resin before hardening. With the agent 7 filled downward, the direction of the bonding surface 5a of the keeper magnetic member 5 is adjusted by tilting the keeper magnetic member 5 within a certain angle range, and then the adhesive 7 is cured. The direction of the keeper magnetic member 5 is fixed.
[0015]
An advantage of configuring the dental magnetic member holder 3 in this way is that the wall peripheral surface 6a of the pocket 6 has a shape of a part of a sphere. It can be mentioned that rotation around the coordinates and adjustment of the inclination angle in a plane perpendicular to the rotation can be very easily performed by being guided by the circumferential surface of the spherical wall, and fine adjustment is possible. Therefore, when the implant body 2 is fixed in a different direction from the vertical axis with respect to the occlusal plane, or when a plurality of implant bodies 2 are implanted, the bonding surface 5a of the keeper magnetic member 5 is bonded and fixed at an optimal occlusion position. can do.
[0016]
In addition, it is preferable to comprise the structural member of the said dental implant 1, the implant main body 2, the holder 3 for dental magnetic members, and the screw 4 from metal materials, such as a titanium alloy, with no biological harm.
[0017]
Next, FIG. 3 shows another form of the dental magnetic member holder 3. Here, the upper end of the dental magnetic member holder 3 is a threaded cap 3d and is screwed to the main body. The upper end of the cap 3d is shown in FIG. The said pocket 6 was formed in this. Here, the screw 8 for connecting the keeper magnetic member 5 and the cap 3d has a shape in which the head 8a is formed by cutting a part of a sphere into a ring shape, and on the other hand, in the central axis direction of the keeper magnetic member 5 A corresponding spherical wall peripheral surface 5c is provided on the upper side of the provided screw-engaging through hole 5b. Therefore, the keeper magnetic member 5 is rotated about the central coordinate axis with respect to the head 8a of the screw 8 and can swing in the vertical direction. 3A shows a state in which the keeper magnetic member 5 is horizontal, and FIG. 3B shows a state in which the keeper magnetic member 5 is tilted.
[0018]
The upper end of the outer periphery of the dental magnetic member holder 3 (cap 3d) gradually decreases in diameter toward the upper end. As a result, there is an effect of preventing undercutting from occurring when the upper structure is detached, and this portion has a spring property. By tightening the screw 8 strongly, the keeper magnetic member 5 is moved to a predetermined inclined position. It can be fixed to.
[0019]
As described above, the keeper magnetic member 5 and the dental magnetic member holder 3 are coupled with the screw 8 and the head 8a of the screw 8 and the keeper magnetic member 5 are engaged using a spherical shape. In addition to the fact that the rotation around the center coordinate and the adjustment of the inclination angle in the plane perpendicular to the center coordinate are guided by the circumferential surface of the spherical wall, the fine adjustment is possible. Since the keeper magnetic member 5 can be installed without using an adhesive such as resin or resin, the keeper magnetic member 5 can be easily removed as needed, for example, when diagnosing the lesion of the maxillofacial skull and neck region by MRI or the like. And the occurrence of artifacts during diagnosis can be avoided.
[0020]
As mentioned above, although the example of embodiment of this invention was demonstrated with the figure, this invention is not limited to the said embodiment, For example, bioceramics, such as a calcium phosphate material and an alumina, are coated around the said keeper magnetic member. Thus, it goes without saying that any form can be used without departing from the object of the invention, for example, by increasing the safety of the living body.
[0021]
【The invention's effect】
As described above, the present invention provides a holder for a magnetic member that is fixed on an implant embedded in a jawbone, and a surface on which a pocket provided on an upper surface and a keeper magnetic member fitted to the pocket are in contact with each other can be freely rotated. Since it has a spherical shape, the keeper magnetic member can be bonded and fixed to the pocket at an optimal occlusion position.
[0022]
According to the present invention, the magnetic member holder includes a fixing screw for screwing the keeper magnetic member into a pocket provided on the upper surface, and the head of the fixing screw and the keeper magnetic member are in contact with each other. By making the contact surface into a rotatable spherical shape, it is possible to fix the keeper magnetic member in the pocket at the optimal occlusion position, and further, the magnetic member without using an adhesive such as bone cement or resin. Therefore, for example, when diagnosing lesions in the craniofacial region of the craniofacial region by MRI or the like, the magnetic member can be easily removed as necessary, and the occurrence of artifacts during diagnosis can be avoided.
[0023]
As described above, the present invention has extremely excellent effects.
[Brief description of the drawings]
FIG. 1 is an exploded side view of a dental implant equipped with a holder for a dental magnetic member of the present invention.
FIG. 2 is a side view of the dental implant of FIG. 1 assembled, with the main part cut away.
FIGS. 3A and 3B are cross-sectional views of a holder for a dental magnetic member according to another embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dental implant 2 Implant main body 3 Dental magnetic member holder 4, 8 Screw 5 Magnetic member 6 Pocket 7 Adhesive 2a Male screw 2b Notch 2c Upper end surface 2d Fitting hole 3a Insertion part 3b Polygonal part 3c, 5b Through-hole 3d Cap 5a Bonding surface 5c Spherical wall peripheral surface 6a Wall peripheral surface 8a Head

Claims (2)

A holder for the magnetic member on the implant Ru fixed buried in the jawbone to utilize the magnetic force mounting the upper prosthesis denture or bridge or the like removably in the mouth, is fitted to the magnetic member holder An implant member comprising a keeper magnetic member ,
The holder for the magnetic member is formed with a pocket having a spherical wall peripheral surface at the upper end,
The keeper magnetic member has a shape in which a part of a sphere is cut into a ring shape, has a spherical side surface corresponding to the wall peripheral surface of the pocket, and the side surface abuts on the wall peripheral surface to It is pivotably fitted into the pocket,
A filling space for filling the adhesive is provided below the keeper magnetic member in the fitted state,
An implant member in which the keeper magnetic member is bonded and fixed to the pocket at an optimal occlusion position. A holder for the magnetic member on the implant Ru fixed buried in the jawbone to utilize the magnetic force mounting the upper prosthesis denture or bridge or the like removably in the mouth, is fitted to the magnetic member holder A keeper magnetic member, and a fixing screw for rotatably fixing the keeper magnetic member to the magnetic member holder,
In the magnetic member holder, a pocket having a spherical wall peripheral surface is formed at the upper end portion, a screw hole is formed downward from the bottom surface of the pocket, and the vicinity of the upper end of the pocket is gradually increased toward the upper end. The thickness has decreased,
The head of the fixing screw has a shape in which a part of a sphere is cut into a ring shape,
The keeper magnetic member has a shape obtained by cutting a part of a sphere into a ring shape, has a spherical side surface corresponding to the wall peripheral surface of the pocket, penetrates from the upper surface to the lower surface, and has a spherical wall peripheral surface on the upper portion. The spherical wall peripheral surface is spherical corresponding to the side surface of the head of the fixing screw, the side surface is in contact with the wall peripheral surface of the pocket, and the spherical wall peripheral surface is Abutting on the side surface of the head of the fixing screw and being rotatably fitted in the pocket;
An implant member in which the keeper magnetic member is screwed and fixed in the pocket at an optimal occlusion position.

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