JP3571066B2 - Jig for fixing abutment of dental implant - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to an implant fixture in a dental prosthesis maintenance device, which is abbreviated as a normal dental implant, which is fixed by being inserted into an embedding hole formed in a jaw bone of a missing tooth portion. The present invention relates to a jig for fixing an abutment of a dental implant for fixing through a hole.
[0002]
[Prior art]
Conventionally, as a dental prosthesis method for a missing tooth part, a method using a bridge and a method using a denture have been generally performed.
However, the bridge method is a method in which healthy natural teeth on both sides of the missing tooth portion are cut into an abutment, and a dental prosthesis located at the missing tooth portion is fixed to a metal body engaging with the abutment. In addition to the fact that healthy natural teeth must be cut, the dental prosthesis located at the missing tooth has the disadvantage that occlusal pressure is not directly applied, causing bone resorption at the site. Was.
In addition, the method using a denture is a method in which a denture fixed to a denture base made of synthetic resin or the like is used as a dental prosthesis. In this method, the occlusal force acting on the dental prosthesis is reduced to the remaining natural teeth. And / or burdened by the oral mucosa, there is a sense of discomfort during the use of the dental prosthesis and a dull taste due to the denture base covering the taste receptors scattered in the oral mucosal tissue. It has the serious disadvantage that it can occur, and that prolonged use causes resorption of the ridge.
[0003]
Therefore, as a treatment method to eliminate these drawbacks, an implant fixture, which serves as a device for maintaining and stabilizing a dental prosthesis, is inserted into the insertion hole formed in the jawbone of the missing tooth to improve the function of the root in the natural tooth. Instead, the dental prosthesis fixing device is fixed to the abutment fixed inside the oral cavity of the implant fixture to form a dental prosthesis maintenance device, and the dental prosthesis is fixed to the dental prosthesis fixing device. Dental implant technology has been developed and implemented.
[0004]
When a treatment method using such a dental implant is performed, the dental prosthesis can be fixed without covering the oral mucosa, and therefore, there is no uncomfortable feeling or dull taste when the dental prosthesis is attached, and natural tooth Since there is an advantage that it is possible to minimize the bone resorption expected when the implant fixture is not implanted because a suitable occlusal force is imparted to the jaw bone and a similar feeling of use is obtained, This method of treatment is rapidly developing and can be applied to single tooth loss, local loss of two or more teeth and edentulous (toothless).
[0005]
As a treatment method using this dental implant, the implant fixture inserted in the insertion hole formed in the jaw bone of the missing tooth part was sufficiently bonded to the jaw bone of the missing tooth part and formed an insertion hole. After the operative part has been healed, the gingival part inside the oral cavity in which the implant fixture has been implanted is re-opened, and the abutment that is the mounting part of the fixing device for the dental prosthesis is fixed to the intraoral part of the implant fixture The abutment is fixed so as not to rotate with respect to the implant fixture, and the fixing device for the dental prosthesis attached to the inner part of the oral cavity is a fixing device for a single tooth. In some cases the dental prosthesis will be positioned correctly on the missing teeth if the fixation device is rotated with respect to the implant fixture Fixing device portion for maintaining against rotation fixing device of a dental prosthesis for tightening is not phenomenon dental prosthesis abutment is also provided on the oral cavity inner side portion to be mounted.
[0006]
In such a treatment method using a dental implant, the operation of fixing the abutment to the inner side of the oral cavity of the implant fixture inserted in the insertion hole formed in the jaw bone of the missing tooth portion is performed by the operation of the oral cavity of the implant fixture. An abutment is positioned on the inner portion, and an engaging portion (usually, a rectangular tubular portion) provided on the inner side of the oral cavity of the implant fixture and an engaging portion (usually provided on the implant fixture side portion of the abutment) Normally, an abutment is engaged with an implant fixture so that the abutment does not rotate with respect to the implant fixture, and an intermediate bolt inserted through a through hole provided through a center portion of the abutment is inserted into the implant. This is done by screwing it into a female thread that is threaded inside the mouth of the fixture. To have.
[0007]
However, since the operation of fixing the abutment to the inner part of the oral cavity of the implant fixture must be performed in a very narrow part, the engaging part provided in the inner part of the oral cavity of the implant fixture and the abutment Not only is it difficult to confirm that the engaging portion provided on the implant fixture side portion has been securely engaged, but also the intermediate bolt is screwed into the internal thread portion of the implant fixture inside the oral cavity. When the screw is screwed, the tightening torque acts on the implant fixture, so that the implant fixture rotates in the insertion hole formed in the jaw bone of the missing tooth and connects the implant fixture with the jaw bone of the missing tooth. Must be done with great care to ensure that is not destroyed, Duck abutment and the intermediate bolt is required to be dropped in to prevent a phenomenon occurs that would swallow accidentally patients in the oral cavity inadvertently because it is very small parts.
[0008]
Furthermore, in recent years, a dental prosthesis for dental implant treatment has been demanded not only for restoration of occlusal function but also for restoration of esthetics. Dental prostheses having a rising configuration that rises and expands in the direction of the oral cavity have been preferred. As a result, the abutment also had a tapered form in which the diameter increased continuously as it moved away from the inside of the oral cavity of the implant fixture, so it was implanted in the implant hole formed in the jawbone of the missing tooth part It is difficult to stably hold the abutment in the oral cavity portion of the implant fixture, and there has been a long-awaited desire to develop a means for securely and easily fixing the abutment at a predetermined position inside the oral cavity of the implant fixture. is there.
[0009]
[Problems to be solved by the invention]
The present invention relates to a dental implant for securely and easily fixing an abutment to an implant fixture which is embedded and connected to an insertion hole formed in a jaw bone of the above-mentioned missing tooth portion through an intermediate bolt. It is an object of the present invention to provide an abutment fixing jig.
[0010]
[Means for Solving the Problems]
The inventor of the present invention has conducted intensive studies to solve the above problems, and as a result, the structure of a jig for fixing an abutment of a dental implant,
Following the male screw portion screwed at one end, a square cylindrical portion, an intermediate cylindrical portion, and a lowermost cylindrical portion via a step portion are sequentially provided, and a through hole is drilled in the central longitudinal direction thereof. An intermediate bolt connecting member provided with an intermediate bolt fitting portion having a shape in which a square cylindrical portion formed at the head of the intermediate bolt is fitted on the lowermost cylindrical portion side of the through hole. A coil spring holder which is supported by the stepped portion through a through hole formed at the center of the intermediate bolt connecting member from the closed portion side of the U-shaped cross section; A coil spring which is fitted and one end of which is inserted and held in the coil spring holding body; and a rectangular tubular portion which is formed in the rectangular tubular portion of the intermediate bolt connecting member at the center of a closed portion having a U-shaped cross section. The other end of the coil spring And a nut screwed into a male screw portion protruding from a through hole of the intermediate bolt rotating operation body, a head positioned on the nut side, and A first connection member including an intermediate bolt holding screw rod having an external thread portion inserted into a through hole of the bolt connection member;
A through hole is formed in a center portion through which the intermediate bolt connecting member in a state in which the square bolt portion of the intermediate bolt is fitted to the intermediate bolt fitting portion in a sliding state is formed in a center portion, and one end of the through hole is provided. An abutment fitting portion having a shape in which a square tubular portion provided in a portion located inside the oral cavity of the abutment is provided, and the side opposite to the side where the abutment fitting portion is provided. An abutment engaging member having a grip portion protruding therefrom at a fingertip, and an abutment engaging member inserted into a through hole formed in a central portion and having an abutment at one end of the through hole. A holding portion is provided for holding a maximum outer diameter portion following the rectangular tubular portion provided on the inner side portion of the mouth, and a slit parallel to the axial direction for providing a spring action to the holding portion is provided. Abutment And support member, a second connecting member comprising more bis securing together the said abutment engaging member and the abutment retaining member,
The inventors of the present invention have sought to solve the problem by adopting a configuration including the above, and have completed the present invention.
[0011]
Hereinafter, the abutment fixing jig of the dental implant according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a jig for fixing an abutment of a dental implant according to the present invention, and an intermediate bolt and an abutment which are used by being mounted on the jig for fixing an abutment of a dental implant according to the present invention. FIG. 2 is an explanatory cross-sectional view showing a state where an intermediate bolt and an abutment are mounted on a jig for fixing an abutment of a dental implant according to the present invention. FIG. 3 is an abutment of a dental implant according to the present invention. FIG. 4 is a cross-sectional view of an intermediate bolt connecting member which is a component of the jig for fixing an abutment, FIG. 4 is a cross-sectional view of an abutment holding member which is a component of a jig for fixing an abutment of a dental implant according to the present invention, and FIG. Is a cross-sectional view of the intermediate bolt of the dental implant, FIG. 6 is a cross-sectional view of the abutment of the dental implant, and FIG. 7 is formed in the jawbone of the missing tooth. The implant fixture which is embedded into input hole is a cross-sectional view showing a state of fixing the abutment by an intermediate bolts.
[0012]
In the drawings, reference numeral 1 denotes a screw rod for holding an intermediate bolt, the head 1a of which constitutes an operating section preferably provided with a knurl around it, and a male screw section 1b at a tip opposite to the head 1a. Is screwed. It is preferable that a stepped portion 1d is provided on the columnar portion 1c between the head portion 1a and the male screw portion 1b at the tip so that the male screw portion 1b side becomes thinner.
[0013]
Numeral 2 denotes a nut whose outer diameter is equal to the outer diameter of the head 1a of the intermediate bolt holding screw rod 1 so as not to hinder the rotation operation of the head 1a constituting the operating portion of the intermediate bolt holding screw rod 1. Preferably it is the same or less.
[0014]
Reference numeral 3 denotes an intermediate bolt rotating operation body having a U-shaped cross section with one end closed (in the illustrated embodiment, the outer shape is a cylindrical shape), and a rectangular cylindrical through hole 3b formed in the center of the closed portion 3a. It is preferable that a knurl is provided around the cylindrical portion.
[0015]
Reference numeral 4 denotes a coil spring inserted from one end into the U-shaped cross section of the intermediate bolt rotating operation body 3, the outer diameter of which is smaller than the inner diameter of the cylindrical portion of the U-shaped cross section of the coil spring holder described later, and the inner diameter thereof. Needs to be larger than the maximum outer diameter portion of the intermediate cylindrical portion of the intermediate bolt connecting member described later.
[0016]
Reference numeral 5 denotes a coil spring holder having a cylindrical shape (in the illustrated embodiment, a cylindrical shape) having one end closed and having a through hole 5b formed at the center of the closed portion 5a. The other end of the coil spring 4 is inserted.
[0017]
Reference numeral 6 denotes a male screw portion 6a screwed to the nut 2 at one end thereof, and a through hole formed at the center of the closing portion 3a of the intermediate bolt rotating operation body 3 following the male screw portion 6a. 3b is provided between the intermediate cylindrical portion 6c following the rectangular cylindrical portion 6b and the lowermost cylindrical portion 6d following the rectangular cylindrical portion 6b. A step portion 6e for holding the closing portion 5a is provided, and a through hole 6f into which the columnar portion 1c of the intermediate bolt holding screw rod 1 can be inserted is formed in the center longitudinal direction thereof. 6f is an intermediate bolt connecting member provided with an intermediate bolt fitting portion 6g having a shape in which a square tubular portion formed on the head of the intermediate bolt described later is fitted on the lower cylindrical portion 6d side. . When the cylindrical portion 1c between the head portion 1a of the screw rod 1 for holding the intermediate bolt and the male screw portion 1b at the tip is provided with a stepped portion 1d so that the male screw portion 1b side becomes thinner, this intermediate portion is used. The fact that a female thread 6h screwed with the male thread 1b at the tip of the intermediate bolt holding screw rod 1 is screwed into the through hole 6f of the bolt connecting member 6, the male thread at the tip of the intermediate bolt retaining screw rod 1 being screwed. The screw portion 1b is screwed into the female screw portion 6h, and the screw rod 1 for holding the intermediate bolt is pushed in until the screwing with the female screw portion 6h is released. It is preferable because it does not easily fall off.
[0018]
Reference numeral 7 denotes an intermediate bolt for connecting an abutment, which will be described later, to the inside of the oral cavity of an implant fixture, which will be described later, and a square cylinder fitted to an intermediate bolt fitting portion 6g of the intermediate bolt connecting member 6 at the head thereof. A threaded portion 7a is provided from the center of the rectangular tube portion 7a, and a female threaded portion of the implant fixture is passed through the bolt hole of the abutment following the head. A male screw portion 7c to be screwed is provided.
[0019]
Reference numeral 8 denotes an abutment engaging member for preventing an abutment, which will be described later, from rotating together with the intermediate bolt 7 when the intermediate bolt 7 is tightened. The intermediate bolt 7 engages the square tube portion 7a with the intermediate bolt. A through hole 8a through which the intermediate bolt connecting member 6 held in a fitted state with the portion 6g is slidable is formed in the center thereof, and one end of the through hole 8a will be described later. An abutment fitting portion 8b having a shape to which a square tubular portion provided on the inner side portion of the abutment is fitted is provided, and the abutment fitting portion 8b is provided on a side opposite to the side provided with the abutment fitting portion 8b. Preferably, a grip portion 8c which can be gripped by a fingertip provided with a knurl on the outer surface is protruded, and a screw hole 8d is drilled through a portion between the grip portion 8c and the through hole 8a. I have.
[0020]
Reference numeral 9 denotes an abutment in which the square tubular portion is fitted to the abutment fitting portion 8b of the abutment engaging member 8, holds the largest outer diameter portion following the square tubular portion, and the abutment does not drop. A through-hole 9a into which the abutment engaging member 8 can be inserted is formed in the center of the abutment holding member, and the inside of the oral cavity of the abutment described later is formed at one end of the through-hole 9a. A holding portion 9b for holding a maximum outer diameter portion following the rectangular tubular portion is provided, and a slit 9c parallel to the axial direction is provided so as to impart a spring effect to the holding portion 9b. By screwing a screw 10 that has passed through the screw hole 8d of the abutment engaging member 8 into a female screw 9d that is screwed at a predetermined position on the side opposite to the side where the holding portion 9b is provided, Ttomento and holding member 9 and the abutment engaging member 8 is adapted to be secured together. When the abutment holding member 9 and the abutment engaging member 8 are fixed with the screw 10, the alignment between the female thread 9 d of the abutment holding member 9 and the screw hole 8 d of the abutment engaging member 8 is performed. For the sake of simplicity, the shape of the abutment holding member 9 on the side opposite to the side where the holding portion 9b is provided is such that the portion of the abutment engaging member 8 opposite to the side where the abutment fitting portion 8b is provided is provided. It is preferable that it has a shape that just engages.
[0021]
Reference numeral 11 denotes an abutment made of titanium or the like which is further attached to the position inside the oral cavity of the implant fixture. The outer diameter increases as the distance increases, forming a frusto-conical shape. The implant fixture side has a rectangular cylindrical concave portion 11a, and the opposite side has an outer peripheral side plane 11b at least perpendicular to the axis and a central side. Is provided, and a bolt hole 11d is penetrated at the center.
[0022]
Reference numeral 12 denotes an implant fixture in a dental prosthesis maintenance device, which is abbreviated as a normal dental implant, which is fixed by being inserted into an insertion hole formed in the jaw bone of the missing tooth. The tip side embedded in the embedding hole formed therein is substantially hemispherical, and the subsequent portion forms an outer shape of a substantially cylindrical portion, and the end located inside the oral cavity of the substantially cylindrical portion has the above-mentioned shape. A square tubular portion 12a that fits into and engages with the square tubular recess 11a of the abutment 11 is protruded, and a female screw portion 12b into which the male screw portion 7c of the intermediate bolt 7 is screwed is formed. It is screwed from the central part toward the above-mentioned substantially columnar part.
[0023]
[Action]
The operation of fixing the abutment 11 of the dental implant to the implant fixture 12 using the jig for fixing the abutment of the dental implant according to the present invention comprising the above-described components will be described below.
[0024]
First, the operation of assembling the jig for fixing the abutment of the dental implant according to the present invention will be described. One end of the coil spring 4 is inserted into the coil spring holder 5 having a U-shaped cross section, and is held by the closing portion 5a. The intermediate bolt connecting member 6 is passed through the coil spring 4 through the through hole 5b formed in the center of the closed portion 5a of the coil spring holder 5 from the end where the male screw portion 6a is screwed. The coil spring holder 5 is inserted and held by the stepped portion 6e provided between the intermediate cylindrical portion 6c and the subsequent lowermost cylindrical portion 6d at the closing portion 5a. The male screw portion 6a screwed at one end of the intermediate bolt connecting member 6 penetrates a through hole 3b drilled at the center of the closing portion 3a of the operating body 3, and continues to the male screw portion 6a. The rectangular tube portion 6b provided is fitted into a through hole 3b formed in the center of the closing portion 3a of the intermediate bolt rotating operation body 3, and the other end of the coil spring 4 is rotated by the intermediate bolt having a U-shaped cross section. The nut 2 is screwed into the male screw portion 6a of the intermediate bolt connecting member 6 protruding from the closing portion 3a of the intermediate bolt rotating operation body 3 after being inserted into the operating body 3 and held by the closing portion 3a.
[0025]
Next, a male screw portion 1b, which is screwed to the end opposite to the head 1a with the head 1a of the intermediate bolt holding screw rod 1, is formed in the center longitudinal direction of the intermediate bolt connecting member 6. It is inserted into the through hole 6f. At this time, a stepped portion 1d is provided in the cylindrical portion 1c between the head portion 1a of the screw rod 1 for holding the intermediate bolt and the male screw portion 1b at the tip so that the male screw portion 1b side becomes thinner. When the internal thread 6h screwed with the male thread 1b at the tip of the intermediate bolt retaining screw rod 1 is screwed into the through hole 6f formed in the center longitudinal direction of the member 6, the intermediate bolt holding is performed. The male screw part 1b at the tip of the screw rod 1 is screwed into the female screw part 6h, and the screw rod 1 for holding the intermediate bolt is pushed in while rotating the screw rod 1 for holding the intermediate bolt until the screwing with the female screw part 6h is released. The nut 2, the intermediate bolt rotating operation body 3, the coil spring 4, the coil spring holding body 5, and the intermediate bolt connecting member 6 are mounted so that the screw rod 1 for use is prevented from dropping off from the intermediate bolt connecting member 6. Middle Intermediate bolt retaining screw rod 1 constitutes a first coupling member which is inserted into the through-hole 6f of the belt connecting member 6.
[0026]
Further, a cylindrical portion in which a through hole 8a of the abutment engaging member 8 is drilled from a side opposite to the holding portion 9b into a through hole 9a drilled at the center of the abutment holding member 9 is abutment. This abutment is inserted from the side of the fitting portion 8b, and a screw 10 penetrating through the screw hole 8d of the abutment engaging member 8 is screwed into a female screw portion 9d screwed at a predetermined position of the abutment holding member 9. The abutment holding member 9 and the abutment engaging member 8 are integrally fixed to the abutment holding member 9 and the abutment engaging member 8 to form a second connecting member in which the abutment holding member 9 and the abutment engaging member 8 are fixed by screws 10.
[0027]
The jig for fixing the abutment of the dental implant according to the present invention is constituted by the first connection member and the second connection member thus configured.
[0028]
Thus, when the jig for fixing the abutment of the dental implant according to the present invention is completed, the intermediate bolt fitting portion 6g provided on the lowermost cylindrical portion 6d side of the through hole 6f of the intermediate bolt connecting member 6 has the intermediate bolt. 7, the head portion 1a of the intermediate bolt holding screw rod 1 is rotated, and the male screw portion 1b of the intermediate bolt holding screw rod 1 is turned into the square of the intermediate bolt 7. The intermediate bolt 7 is held by the intermediate bolt connecting member 6 in a state where the coil spring 4 is hardly compressed by being screwed into a female thread portion 7b threaded from the center of the cylindrical portion 7a. Thereafter, the abutment 11 is moved from the square tubular portion 11c side to the holding portion 9b side of the abutment holding member 9, and is held by the spring action of the slit 9c provided in parallel with the axial direction of the abutment holding member 9. The outer peripheral surface 11b perpendicular to the axis of the abutment 11 is brought into contact with the holding portion 9b to hold the maximum outer diameter portion following the square tubular portion 11c inside the oral cavity of the abutment 11. At the same time, the square tubular portion 11c of the abutment 11 is fitted to the abutment fitting portion 8b provided at one end in the through hole 8a of the abutment engaging member 8. Finally, the lowermost cylindrical portion 6d of the intermediate bolt connecting member 6 holding the intermediate bolt 7 is inserted into the through hole 8a of the abutment engaging member 8.
[0029]
When the intermediate bolt 7 and the abutment 11 are mounted on the abutment fixing jig of the dental implant according to the present invention in this way, the abutment 11 is transferred to the oral cavity as it is, and the square cylindrical recess 11a of the abutment 11 is transferred. When the side is transferred to the inside of the oral cavity of the implant fixture 12 and the male thread portion 7c of the intermediate bolt 7 is brought into contact with the female thread portion 12b threaded inside the oral cavity of the implant fixture 12, the intermediate bolt 7 is held. Since the intermediate bolt connecting member 6 is slidable in the through hole 8a of the abutment engaging member 8 of the second connecting member, the abutment 11 held by the second connecting member can be moved to the oral cavity of the implant fixture 12. It can abut against the inner part. In this state, when the grip portion 8c of the abutment engaging member 8 is gripped with a fingertip and the cylindrical portion of the intermediate bolt rotating operation body 3 is rotated, the intermediate bolt 7 is turned to the corner provided on the head thereof. The cylindrical portion 7a is fitted to the intermediate bolt fitting portion 6g of the intermediate bolt connecting member 6, and the female thread portion 7b screwed from the center of the square cylindrical portion 7a is the screw portion 1 of the intermediate bolt holding screw rod 1. Since it is screwed to the male screw portion 1b screwed at the tip and is not pulled out from the intermediate bolt connecting member 6, it rotates integrally with the intermediate bolt rotating operation body 3 to rotate the intermediate bolt 7 The male screw portion 7c is screwed into the female screw portion 12b screwed inside the oral cavity of the implant fixture 12.
[0030]
When the intermediate bolt rotating operation body 3 is rotated, the gripping portion 8c of the abutment engaging member 8 is gripped by a fingertip, so that the abutment 11 is maintained in a state of not rotating with respect to the implant fixture 12. As the male screw portion 7c of the intermediate bolt 7 is screwed into the female screw portion 12b screwed inside the oral cavity of the implant fixture 12, the intermediate bolt rotating operation body 3 moves toward the abutment engaging member 8 side. Therefore, the coil spring 4 is compressed. Then, the end surface of the abutment 11 on the side of the rectangular cylindrical concave portion 11a and the end surface of the rectangular cylindrical portion 12a inside the oral cavity of the implant fixture 12 come into strong contact, and the force for rotating the intermediate bolt rotating operation body 3 suddenly increases. When the gripping portion 8c of the abutment engaging member 8 is slightly rotated at this time, the second connecting member holding the abutment 11 is instantaneously moved to the implant fixture 12 side by the force of the coil spring 4. Then, the square cylindrical portion 12a provided inside the oral cavity of the implant fixture 12 and the square cylindrical concave portion 11a of the abutment 11 are fitted, and the abutment 11 and the implant fixture 12 collide with each other to produce a sound or Since an impact is generated, the abutment and the square tubular portion 12a provided inside the oral cavity of the implant fixture 12 are formed. It can be confirmed that the first rectangular cylindrical concave portion 11a has been fitted, and if the grip portion 8c of the abutment engaging member 8 cannot be rotated, it can be confirmed that the fitting has already been completed. is there. Then, while holding the abutment 11 so as not to rotate by the second connecting member, the intermediate bolt rotating operation body 3 is further rotated so that the intermediate bolt 7 is screwed into the female thread portion 12 b screwed inside the oral cavity of the implant fixture 12. Tighten to complete the installation. Thereafter, the head 1a of the screw rod 1 for holding the intermediate bolt is rotated in the opposite direction, and the male thread portion 1b of the screw rod 1 for holding the intermediate bolt is screwed from the center of the square tube portion 7a of the intermediate bolt 7. When the screwing with the portion 7b is released and the second connecting member is moved in a direction away from the abutment 11, the holding action of the holding portion 9b of the abutment holding member 9 on the maximum outer diameter portion of the abutment 11 is released, In the oral cavity, the jig for fixing the abutment of the dental implant according to the present invention can be removed with the abutment 11 fixed to the implant fixture 12 with the intermediate bolt 7.
[0031]
【The invention's effect】
As described in detail above, the jig for fixing the abutment of the dental implant according to the present invention, instead of the method using a bridge and the method using a denture, which has been generally performed as a conventional dental prosthesis method for a missing tooth part, In the technology of dental implants, which have been developed and implemented as a treatment method for overcoming the drawbacks of these methods, they are already implanted and fixed in an implantation hole formed in the jaw bone of the missing tooth part The work of fixing the abutment to the implant fixture via the intermediate bolt can be performed by transferring the implant abutment to the position inside the oral cavity of the implant fixture while holding the intermediate bolt and the abutment. Inadvertently dropping the abutment into the mouth and causing accidental swallowing by the patient In addition, the jig of the present invention can be easily operated with one hand because the intermediate bolt is slightly screwed into the internal thread portion of the implant fixture, so that the jig of the present invention does not fall off from the implant fixture, and the upper jaw is easily dropped. The operation at is also easy. In addition, since it can be performed without touching any of the implant fixture, the abutment, and the intermediate bolt, the treatment can be performed very hygienically.
[0032]
In addition, since it is necessary to fix the abutment to the inside of the oral cavity of the implant fixture in a very narrow portion where the implant fixture is embedded, the corner provided on the inside of the oral cavity of the implant fixture must be performed. The phenomenon that it was difficult to confirm that the tubular portion was securely fitted in the rectangular tubular recess provided on the implant fixture side portion of the abutment is due to the structure of the first connecting member incorporating the coil spring. When the square tube-shaped part provided in the inner part of the oral cavity of the fixture fits into the square tube-shaped concave part provided in the part of the abutment on the implant fixture side, the abutment is instantaneously placed inside the oral cavity of the implant fixture. The practitioner can easily move and collide with the sound or impact It is to be able to confirm.
[0033]
The abutment is prevented from rotating by the second connecting member so that the tightening torque does not act on the implant fixture when the intermediate bolt is screwed into the female thread portion screwed into the oral cavity portion of the implant fixture. Since the implant fixture does not rotate within the insertion hole formed in the jawbone of the missing tooth, the bond between the implant fixture and the jawbone of the missing tooth is not broken, The practitioner can safely perform the treatment.
The value of contributing to the dental field of the present invention having such various advantages is enormous.
[Brief description of the drawings]
FIG. 1 shows a jig for fixing an abutment of a dental implant according to the present invention, and an intermediate bolt and an abutment which are used by being mounted on the jig for fixing an abutment of a dental implant according to the present invention. FIG.
FIG. 2 is an explanatory sectional view showing a state in which an intermediate bolt and an abutment are mounted on a jig for fixing an abutment of a dental implant according to the present invention.
FIG. 3 is a sectional view of a member for connecting an intermediate bolt, which is a component of a jig for fixing an abutment of a dental implant according to the present invention.
FIG. 4 is a cross-sectional view of an abutment holding member which is a component of a jig for fixing an abutment of a dental implant according to the present invention.
FIG. 5 is a sectional view of an intermediate bolt of the dental implant.
FIG. 6 is a sectional view of an abutment of a dental implant.
FIG. 7 is an explanatory cross-sectional view showing a state in which an abutment is fixed to an implant fixture embedded in an insertion hole formed in a jaw bone of a missing tooth portion by an intermediate bolt.
[Explanation of symbols]
1 Screw rod for holding intermediate bolt
1a head
1b Male thread
1c cylindrical part
1d step
2 nuts
3 Intermediate bolt rotating body
3a Closed part
3b Through hole
4 Coil spring
5 Coil spring holder
5a Closed part
5b Through hole
6 Intermediate bolt connection members
6a Male thread
6b square tubular part
6c Intermediate cylindrical part
6d lowest cylindrical part
6e Step
6f through hole
6g Intermediate bolt fitting part
6h Female thread
7 Intermediate bolt
7a Square tube
7b Female thread
7c male thread part
8 Abutment engaging member
8a Through hole
8b Abutment fitting part
8c gripper
8d screw hole
9 Abutment holding member
9a Through hole
9b Holder
9c slit
9d Female thread
10 screws
11 Abutment
11a Square cylindrical recess
11b Outer circumference side plane
11c square tubular part
11d bolt hole
12 Implant fixture
12a square tubular part
12b Female thread

Claims (4)

Following the male screw portion (6a) screwed at one end, the lower cylindrical portion (6d) is sequentially formed through the rectangular cylindrical portion (6b), the intermediate cylindrical portion (6c), and the step portion (6e). A through hole (6f) is provided in the center longitudinal direction thereof, and is formed on the head of the intermediate bolt (7) on the lowermost cylindrical portion (6d) side of the through hole (6f). The intermediate bolt connecting member (6) provided with an intermediate bolt fitting portion (6g) having a shape to which the square cylindrical portion (7a) fits, and the intermediate bolt connecting member (6) has a U-shaped cross section. A coil spring holder (5) that penetrates through the through hole (5b) drilled in the center from the closing portion (5a) side and is supported by the step portion (6e); 6) a coil which is fitted on the outside and one end of which is inserted and held in the coil spring holder (5) A rectangular tubular through hole (3b) drilled at the center of a closed section (3a) having a U-shaped cross-section in the rectangular tubular section (6b) of the coupling (4) and the intermediate bolt connecting member (6). And the other end of the coil spring (4) is inserted into the intermediate bolt rotating operation body (3), and the coil spring (4) projects from a through hole (3b) of the intermediate bolt rotating operation body (3). The nut (2) screwed to the male screw portion (6a) and the head (1a) are located on the nut (2) side and in the through hole (6f) of the intermediate bolt connecting member (6). A first connecting member including an intermediate bolt holding screw rod (1) having a male screw portion (1b) inserted therein;
A through hole (8a) through which the intermediate bolt connecting member (6) in a state where the square tube portion (7a) of the intermediate bolt (7) is fitted to the intermediate bolt fitting portion (6g) is slidable. Is drilled at the center and an abutment having a shape in which a square tubular portion (11c) provided at a portion of the abutment (11) located inside the oral cavity at one end of the through hole (8a) fits. Abutment engaging portion (8b) is provided, and an abutment engaging portion (8c) protrudingly provided on a side opposite to the side where the abutment engaging portion (8b) is provided is provided. An abutment engaging member (8) is inserted into a member (8) and a through hole (9a) drilled in the center, and an oral cavity of the abutment (11) is inserted into one end of the through hole (9a). The last part following the square tubular part (11c) provided in the inner part An abutment holding member provided with a holding portion (9b) for holding an outer diameter portion and a slit (9c) parallel to an axial direction for imparting a spring action to the holding portion (9b); 9) a second connecting member comprising: an abutment engaging member (8); and a screw (10) integrally fixing the abutment holding member (9).
A jig for fixing an abutment of a dental implant, comprising: A step (1d) is provided on a cylindrical portion (1c) from the head (1a) of the screw rod (1) for holding the intermediate bolt to the male screw (1b) at the tip so that the male screw (1b) side becomes thinner. And a female screw portion screwed into the male screw portion (1b) of the screw rod (1) for holding the intermediate bolt in a through hole (6f) drilled in the center longitudinal direction of the member (6) for connecting the intermediate bolt. (6h) is threaded, and the threaded portion (1b) of the intermediate bolt holding screw rod (1) is disengaged from the female thread (6h) of the intermediate bolt connecting member (6). 2. The jig for fixing an abutment of a dental implant according to claim 1, wherein the jig is pressed down to a maximum. 3. The jig for fixing an abutment of a dental implant according to claim 1, wherein the outer diameter of the nut (2) is the same as or smaller than the outer diameter of the head (1a) of the screw rod (1) for holding the intermediate bolt. . The shape of the abutment holding member (9) opposite to the side where the holding portion (9b) is provided is opposite to the side of the abutment engaging member (8) where the abutment fitting portion (8b) is provided. The jig for fixing an abutment of a dental implant according to any one of claims 1 to 3, wherein the side portion has a shape which just engages.

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