JP3012791U - Implant Abutment Cylinder for Denture Installation - Google Patents

Abstract

(57) [Summary] [Object] To provide an abutment cylinder for implants, which is a denture mounting tool for obtaining an abutment cylinder body having a 15 ° inclination. [Structure] An abutment cylinder is placed on a root main body embedded in the alveolar bone, and the abutment cylinder is fixed to the root main body by inserting a fixing bolt, and a denture support shaft is capped on an inclined protruding portion of the abutment cylinder. In the implant which is stood up with the interposition of the abutment cylinder body 1, the taper-shaped inclined protrusion 2 has a protrusion angle of 15 °, and a fixing bolt insertion hole drilled in the middle of the inclined protrusion 2 is inserted into the tooth root body 4 Of the fixing hole 5 and a straight hole extending obliquely with respect to the axis of the fixing hole 5 and a straight hole extending on the axis at the confluence point on the axis of the inclined support shaft hole 7 formed from the tip of the inclined protrusion. Bending insertion hole 9
The fixing bolt 11 which is obliquely guided is screwed into the fixing hole 5 of the tooth root body 4 to fix the abutment cylinder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an implant abutment cylinder which is a denture mounting tool used in an implant method (artificial root therapy) which is a type of denture mounting method.

[0002]

[Prior art]

 Recently, the development of dentures has been remarkable, and the dentures have evolved from the conventional removable removable teeth that are simply placed on the gums to the dentures that adopt an implant method that integrates with a tissue that gives a feeling similar to a permanent tooth (natural tooth). . As this implant, an artificial metal tooth root is embedded in an alveolar bone (jaw bone), and an artificial denture is fixed to a shaft standing on the tooth root. That is, as shown in FIG. 8, the implant has a root body (fixture) a to be directly embedded in the bone of the jaw, and an abutment with a predetermined inclination that serves as a fulcrum member for supporting the tooth on the upper part of the root body a. The attachment cylinder b is passed through a vertically (vertically) inserted fixing bolt d, and a tip screw portion d ′ is screwed into a fixing female screw portion e to be fixed, and then, the inclined projection portion c of the abutment cylinder b is covered. A denture support shaft g is erected with a cap f interposed, the length of the support shaft g is appropriately cut, and a denture (not shown) is attached. In this case, in the abutment cylinder b currently used, the protrusion angle α of the inclined protrusion c (inclination angle with reference to the vertical axis of the tooth root body) is 20 ° and 25 ° for convenience of manufacturing and processing technology. There were only two types (see Fig. 11). However, even in the case of implant-type dental treatment, the alignment of teeth actually varies widely from person to person, so in order to obtain a denture arrangement corresponding to that, an abutment cylinder with a protrusion angle other than the above is available. The appearance of b is awaited. For example, as a request from the dentist side, it is desired that the inclined protruding portion c is inclined by 15 ° (see FIG. 9).

[0003]

[Problems to be solved by the device]

 That is, in the implant, the projection size of the abutment cylinder is regulated, and thus it is not possible to match the angles of the inclined projections of the abutment cylinder with the current processing technology. For example, as shown in FIGS. 7A, 7B and 7C, even if various angles are taken, the protruding dimension (height) S of the inclined protruding portion c of the abutment cylinder b is specified to be 5.5 mm. Therefore, if the protrusion angle of the inclined protrusion c is set to a small angle such as 15 °, the inclined protrusion c is in a rising state as compared with the 20 ° and 25 ° types as shown in FIGS. Assuming that the insertion hole h of the fixing bolt d having a predetermined diameter (φ2.6 mm) is pierced (straight line) from the inclined surface c ′ of the inclined projection c toward the root main body facing downward as in the conventional case. , The upper end of the insertion hole h is partially (double) attached to the rim of the inclined support shaft hole k which is separately drilled from the tip surface j of the inclined protrusion c, and the inclined support shaft hole k cannot be screwed. . On the other hand, if the angle of protrusion of the inclined protrusion c is set to a large angle such as 20 ° or 25 °, the tip end surface j of the inclined protrusion c is displaced from the position of the insertion hole h (FIG. 11, FIG. 11). 12), a predetermined inclined support shaft hole k can be provided.

In view of the above situation, the present invention solves the above problems by changing the shape of the insertion hole for the fixing bolt to a bent shape so that the inclination protrusion of the abutment cylinder can be machined even if the inclination is 15 °. The object is to provide an abutment cylinder for implants, which is a device for attaching a denture.

[0005]

[Means for Solving the Problems]

 According to the present invention, an abutment cylinder having a predetermined inclination is placed on a root main body embedded in an alveolar bone, and the abutment cylinder is fixed to the root main body by inserting a fixing bolt. In an implant in which a support shaft for covering a denture is locked with a cap interposed, a taper-shaped inclined protrusion of the abutment cylinder is formed to have a protrusion angle of 15 °, and a fixing bolt for drilling in the middle of the inclined protrusion is used. The insertion hole has an inclined hole formed obliquely with respect to the axis of the fixing hole of the tooth root main body, and a straight hole extending toward the axis at the confluence point on the axis of the inclined support shaft hole formed from the tip of the inclined protrusion. And a fixing bolt obliquely guided in the bending insertion hole is screwed into the fixing hole of the tooth root body to fix the abutment cylinder.

[0006]

[Action]

 As described above, when the projection angle of the inclined protrusion of the abutment cylinder mounted on the root main body embedded in the alveolar bone is set to 15 °, the insertion hole for the fixing bolt formed in the inclined surface of the inclined protrusion is set. The shape of the tip of the slanted protrusion is not a straight shape but a bent insertion hole formed by combining the slanted hole that is bored inward from the slanted surface and the straight hole that is on the axis of the fixing hole of the root body. Since a part of the fixing bolt insertion hole is not located on the surface, it is possible to surely form the inclined support shaft hole in an inclined manner. That is, even if the projection angle of the inclined projection of the abutment cylinder is set to a small angle such as 15 °, the fixing bolt insertion hole extends from the middle of the inclined surface of the inclined projection toward the center and the fixing hole of the tooth root body. The fixing bolt is obliquely guided from the bending insertion hole and is screwed and fixed to the tooth root body fitted to the lower part of the abutment cylinder. Also, since the fixing bolt insertion hole (bending insertion hole) is located in the inclined protrusion and is separately configured from the inclined support shaft hole, there is no hindrance in the work of drilling the inclined support shaft hole. The shaft of the support shaft for denture mounting is also reliable. Of course, in this case, the inclined projection is covered with a predetermined cap in advance, and the spindle is projected on the top of the cap.

[0007]

【Example】

 The present invention will be described below with reference to the drawings of the embodiments.

1 to 5 show an embodiment of an abutment cylinder in which the projection angle of the inclined projection portion is set to 15 °, where 1 is the projection angle α (abutment of the tapered inclined projection portion 2 provided on the upper portion. The abutment cylinder body having an inclination angle of 15 ° with respect to the vertical axis of the tooth root body facing the lower part of the abutment cylinder is set to 15 °, and the fixing bolt insertion hole 3 formed inside the abutment cylinder body 1 is An inclined hole portion 6 which is formed in the middle of the inclined surface 2'on one side of the tapered inclined protruding portion 2 and which is formed obliquely with respect to the axis of the fixing hole 5 of the tooth root main body 4 facing below the abutment cylinder main body 1; A bent insertion hole 9 is formed by a straight hole portion 8 that is formed separately from the tip end surface of the inclined protruding portion 2 and extends straight from the axial confluence point of the inclined support shaft hole 7 toward the axial line. Further, the inclined support shaft hole 7 of the inclined protruding portion 2 is formed by engraving a female screw 7a on the hole surface, and an abutment cylinder 10 is constituted by these whole structures. A fixing bolt 11 is inserted into the bending insertion hole 9 of the abutment cylinder body 1. Reference numeral 12 denotes a plastic cap that covers the inclined protruding portion 2 of the abutment cylinder body 1, and the screw shaft portion 14a of the denture support shaft 14 is inclined through the through hole 13 formed in the top 12a of the cap 12. 7 is screwed into the female screw portion 7a. In addition, a fitting step portion 16 provided at the upper end of the root body 4 to be embedded in the alveolar bone is fitted into the fitting receiving groove portion 15 engraved in the lower end surface of the abutment cylinder body 1, and the root body 4 is fixed. The female screw portion 5a formed in the hole 5 is screwed with the screw portion 11a of the fixing bolt 11 on the abutment cylinder body 1 side, and the implant 17 is formed as a whole. The root body 4 and the abutment cylinder body 1 are made of titanium metal that is well compatible with the tissue of the alveolar bone (jaw bone).

To explain this action, in manufacturing the abutment cylinder main body 1, first, as shown in the processing explanatory views shown in FIGS. 6A, 6B, 6C, 6D, 6E, 6F, a titanium metal circle is used. A bolt insertion hole 19 having a predetermined length is formed at the center of one end 18a of the rod 18, and the round rod 18 is cut into a predetermined length (see FIG. 6B). In this case, the bolt insertion hole 19 is formed with a large-diameter hole portion 19a as shown in FIG. 6C by using an appropriate drilling tool (not shown) (for example, the inlet diameter is φ2.0 mm and the internal hole diameter is φ2). .6 mm).

Next, a taper cutting 20 at a predetermined angle (15 ° tangent line) is cut on one side surface 18c of the tip end portion 18b of the round bar 18 so that a part of the bolt insertion hole 19 bored inside appears. (See FIG. 6D). Here, the opening 21 formed here is the inclined hole portion 6, the bolt insertion hole 19 is the straight hole portion 8, and the bent insertion hole 9 is formed as a whole. Further, the other side surface 18d of the tip end portion 18b of the round bar 18 is appropriately subjected to a taper cutting 22 which is the opposite of the above, and the taper cutting 22 and the taper cutting 20 form a taper-shaped inclined protruding portion 2.

After that, if an inclined support shaft hole 7 is drilled in the end face remaining in the tip end portion 18b of the round bar 18 until it reaches the bending insertion hole 9 (see FIG. 6E), the entire abutment cylinder body 1 Becomes

Here, in the dental treatment by the implant method at the position of the missing tooth, first, a predetermined treatment (drilling work) is performed in advance on the alveolar bone (jaw bone) side to prevent the removal of the tooth from the outer periphery that becomes the artificial tooth root. The tooth root body 4 with the thread groove 23 is embedded. After the tooth root body 4 is stabilized, it is placed so that the fitting receiving groove portion 15 on the lower surface of the abutment cylinder body 1 is fitted to the fitting step portion 16 provided on the upper portion of the tooth root body 4 (of course, the tooth root body). Since the upper surface is covered with the mucosa during the stabilization period of 4, the mucous membrane is peeled off). In this case, the lower surface of the abutment cylinder main body 1 and the upper portion of the tooth root main body 4 are male and female fitted with the fitting receiving groove portion 15 and the fitting step portion 16, so that the positioning can be easily performed.

Next, the fixing bolt 11 is inserted into the bending insertion hole 9 formed in the abutment cylinder body 1 from the slanted hole portion 6 opened in the tapered slanted projection 2 at a slight angle, and the straight hole portion 8 is formed. After that, the tip is guided to the fixing hole 5 of the lower root body 4, and the screw portion 11a of the fixing bolt 11 is screwed into this female screw portion 5a to integrally fix the abutment cylinder body 1 to the root body 4. To do.

After that, the tapered inclined protrusion 2 of the abutment cylinder body 1 is covered up to the base of the cap 12, and the screw shaft portion 14a of the denture support shaft 14 is inserted into the through hole 13 of the top portion 12a of the cap 12. The tip of the screw shaft portion 14a is screwed into and fixed to the female screw portion 7a of the inclined support shaft hole 7. Finally, the length of the denture support shaft 14 protruding from the cap 12 may be appropriately adjusted, and a denture (not shown) may be attached thereto.

As described above, since the abutment cylinder body 1 is inclined by 15 °, it becomes a protrusion of the denture support shaft 14 different from the conventional 20 ° inclination or 25 ° inclination. It will be possible to create the teeth of each person and the corresponding denture arrangement that could not be obtained until now.

[0016]

[Effect of device]

 As described above, the implant abutment cylinder serving as the denture mounting device of the present invention has a fixing bolt insertion hole that is formed by inserting an abutment cylinder to be placed on the root body into a tapered inclined protrusion of the abutment cylinder body. By adopting a bent insertion hole structure consisting of an inclined hole part and a straight hole part, even if the taper-shaped inclined protrusion part has a shallow inclination of 15 °, the end of the fixing bolt insertion hole has an inclined support provided separately on the inclined protrusion part. It is formed without double in the shaft hole so that the fixing bolt can be inserted securely. For this reason, the abutment cylinders that have been provided with only two types of angles of 20 ° and 25 ° have come to be 15 ° even at the same height, which makes the implant method even more sophisticated. It becomes possible to install dentures. Also, in this case, the abutment cylinder body is machined so that a hole for inserting the fixing bolt is drilled at one end of the titanium round bar and a taper cut with a 15 ° inclination is cut at the tip so that part of the hole appears. Only by doing so, the bent insertion hole of the inclined hole portion and the straight hole portion occupying the main part of the present invention can be obtained, so that there is an effect that it can be reasonably manufactured even when processing a hard metal member such as titanium.

[Brief description of drawings]

FIG. 1 is a side view of essential parts of an abutment cylinder for implants showing an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a side view of the abutment cylinder body.

FIG. 4 is a bottom view of the same.

FIG. 5 is an explanatory view of inserting a fixing bolt into the abutment cylinder body.

FIG. 6 is an explanatory view showing a cutting process of an abutment cylinder body, (A) is a side view of a round bar (material),
(B) is a cutting state of the fixing bolt insertion hole, (C) is a cutting state of the large diameter hole, (D) is a cutting state of taper cutting formed at the tip of the round bar, (E) is a bending insertion hole And the inclined support shaft hole is formed, and (F) shows a state in which the fixing bolt and the denture support shaft are exposed to the bending insertion hole and the inclined support shaft hole.

7A and 7B are explanatory views showing various projecting angles of the abutment cylinder body, where FIG. 7A is a side view with a 25 ° inclination, which is a conventional product, FIG. The side view of the present invention with a 15 ° inclination is shown.

FIG. 8 is an explanatory view in which a conventional abutment cylinder is separated.

FIG. 9 is an explanatory view of forming a straight fixing bolt insertion hole similar to a conventional one in an abutment cylinder body having a 15 ° inclination.

FIG. 10 is a plan view of the same.

FIG. 11 is an explanatory view of drilling a fixing bolt in a conventional abutment cylinder body having a 20 ° inclination.

FIG. 12 is a plan view of the same.

[Explanation of symbols]

 1 Abutment Cylinder Main Body 2 Tapered Inclined Projection 3 Insertion Hole for Fixing Bolt 4 Tooth Root Body 5 Fixing Hole 6 Inclined Hole 7 Inclined Shaft Bore 8 Straight Hole 9 Bending Insertion Hole 11 Fixing Bolt 12 Cap 14 Prosthetic Shaft for Denture

Claims (1)

[Scope of utility model registration request] 1. An abutment cylinder having a predetermined inclination is placed on a root main body embedded in the alveolar bone, and the abutment cylinder is fixed to the root main body by inserting a fixing bolt, and an inclined projection of the abutment cylinder is also provided. In an implant in which a support shaft for covering a denture is locked with a cap interposed, a protrusion angle of a tapered inclined protrusion of the abutment cylinder is formed to 15 °, and a fixing bolt is inserted in the middle of the inclined protrusion. A hole, an inclined hole portion that is formed obliquely with respect to the axis of the fixing hole of the tooth root body, and a straight hole portion that extends upward on the axis at the confluence point on the axis of the inclined support shaft hole that is formed from the tip of the inclined protrusion. And a fixing bolt obliquely guided in the bending insertion hole is screwed into the fixing hole of the tooth root body to fix the abutment cylinder. Abutment cylinder for the implant to be a tooth mounted tool.