JP2009233179A - Artificial dental root and implant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an artificial dental root capable of increasing fixing strength to an alveolar bone, and to provide a dental implant. <P>SOLUTION: The artificial dental root includes: an artificial dental root body with a screw hole; and fixing assisting means to be screwed onto the artificial dental root body via the screw hole. The fixing assisting means is a screw shape body so as to be embedded to the alveolar bone or a jaw bone by being screwed from the screw hole from the inner part of the artificial dental root body to the outer part. The dental implant includes: the artificial dental root; an abutment fixed to an end on the proximal end side of the artificial dental root body; and a dental crown fixed by the abutment. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an artificial dental root and a dental implant used for implant treatment, which is one of the repair treatments for a missing tooth, and more particularly to an artificial dental root and an implant that can enhance fixation to an alveolar bone or a jaw bone as needed.

In order to restore a tooth that has been lost due to caries or periodontal disease, it is desirable to rejuvenate the function of inserting an artificial tooth that is as close to natural as possible. As a treatment method, an implant treatment in which an artificial dental root serving as a tooth root portion is embedded in the alveolar bone of the jaw and a dental crown of an upper structure is loaded on the artificial dental root has attracted attention. This implant treatment method becomes a semi-permanent tooth as long as maintenance after treatment is performed, and is an effective treatment method.
As a dental implant used in implant treatment, generally, a dental implant having one artificial tooth root, an abutment fixed to the artificial tooth root, and a crown fixed to the abutment is employed. The artificial tooth root is embedded in the alveolar bone, and the alveolar bone grows around the artificial tooth root during a stable period (healing period). As a result, the embedded artificial tooth root is finally firmly fixed to the alveolar bone. An abutment portion called an abutment is connected to the artificial tooth root, and a new crown is mounted on the abutment.
In the meantime, a period in which the artificial tooth root is firmly fixed to the alveolar bone is necessary as the above-mentioned stable period, and usually about 3 months for the lower jaw and about 6 months for the upper jaw.
Furthermore, the amount and thickness of the alveolar bone of the person who can receive the implant treatment, and the form of the neck of the jaw bone and the like are various, and the dental implant as described above has only one artificial tooth root. You may not be able to get a good fix. Further, even when the alveolar bone is fragile like the upper molar, there is a risk that the fixing force is insufficient and the life is shortened compared to other parts.
In order to solve this problem, for example, as shown in FIG. 10, a plurality of artificial tooth roots 100 arranged at equal intervals, a tooth root base portion 101 fixed to the alveolar bone by these artificial tooth roots 100, and the tooth root base A dental implant 103 including an abutment 102 fixed to the portion 101 is disclosed (see Patent Document 1).

  However, since the dental implant 103 described above is provided with a plurality of artificial tooth roots 100, the overall size is increased. For this reason, an application range will be limited to big teeth, such as a molar. In order to prevent this, it is conceivable to make the artificial tooth root 100 thin. However, it is impossible to obtain a sufficient fixing force, and the strength is low and there is a risk of breakage.

JP 2000-252836 A

  This invention is made | formed in view of the said present condition, and it aims at providing the artificial tooth root and dental implant which can raise the fixation intensity | strength to an alveolar bone or a jaw bone, without enlarging. In addition, by increasing the fixation strength of the artificial root to the alveolar bone or the jaw bone, the life of the artificial dental root and the dental implant can be extended. The abutment and the crown can be attached without requiring or significantly shortening.

The present invention is as follows.
1. An artificial tooth root body provided with a screw hole, and a fixing auxiliary means screwed into the artificial tooth root body via the screw hole, the fixing auxiliary means being a screw-like body, from the inside of the artificial tooth root body An artificial dental root that is embedded in the alveolar bone or jawbone by screwing from the screw hole toward the outside.
2. The artificial tooth root body is a cylindrical body whose tip is blocked. The artificial tooth root described in 1.
3. The screw hole provided in the artificial tooth root body has a distal direction and an oblique direction with respect to an axial direction in which the fixing auxiliary means screwed into the screw hole extends from the base end of the artificial tooth root body to the tip. Is open and
The angle formed by the axial direction of the artificial tooth root main body and the axial direction of the fixing auxiliary means screwed into the screw hole is 10 to 60 degrees. Or 2. The artificial tooth root described in 1.
4). 1. The screw hole is provided in the side wall portion of the artificial dental root body. The artificial tooth root of any one of thru | or 3.
5. 1. The screw hole is provided in the proximal end portion of the artificial dental root body. The artificial tooth root of any one of thru | or 3.
6). 1. The screw hole is provided at the tip of the artificial dental root body. The artificial tooth root of any one of thru | or 3.
7). The above 1. wherein the screw holes are plural. The artificial tooth root of any one of thru | or 6.
8). 6. When there are a plurality of the screw holes, each of the screw holes is opened radially and uniformly in the circumferential direction. The artificial tooth root described in 1.
9. The direction indication mark which shows the protrusion direction of the said fixing auxiliary means is formed in the base end part of the said artificial tooth root main body. The artificial tooth root of any one of thru | or 8.
10. Above 1. The artificial tooth root of any one of thru | or 9 is provided, The abutment fixed to the end by the side of the base end part of this artificial tooth root main body, The crown fixed to this abutment, It is characterized by the above-mentioned. Dental implants.

According to the artificial tooth root of the present invention, since the fixation assisting means for strengthening the fixation with the alveolar bone or the jawbone is provided, the artificial tooth root can be doubled and the fixing strength of the artificial tooth root can be increased. Further, by increasing the fixation strength of the artificial dental root, the stable period for firmly fixing the artificial dental root and the alveolar bone or the jawbone can be shortened. Furthermore, the lifetime of the artificial tooth root can be extended.
Further, when the fixing auxiliary means is a screw-like body and protrudes from the inside of the artificial tooth root body to the outside, the artificial tooth root body has a screw hole opened to the outside, and the fixing auxiliary means extends from the screw hole. Is rotated and embedded in the alveolar bone or jaw bone from the artificial dental root body, and after the implantation, the fixation assisting means is rotated and protruded outside the artificial dental root body to be bitten into the alveolar bone or jaw bone. For this reason, it is possible to increase the fixation strength of the artificial tooth root without increasing the artificial tooth root as in the prior art, and to suppress an increase in size.
Moreover, when the tip of the artificial dental root body is a sealed cylinder, the artificial dental root body can be embedded in the alveolar bone or the jawbone in a state where the fixation assisting means is stored in the artificial dental root. Then, after the implantation, the fixation assisting means is rotated so as to protrude to the outside of the artificial dental root body, and bite into the alveolar bone or the jawbone. For this reason, embedding of the artificial dental root body into the alveolar bone or the jawbone can be performed smoothly as in the conventional case.

Further, the screw hole provided in the artificial dental root body is in a distal direction and oblique direction with respect to an axial direction in which the fixing auxiliary means screwed into the screw hole extends from the proximal end of the artificial dental root body to the distal end. When the angle between the axial direction of the artificial dental root body and the axial direction of the fixing auxiliary means screwed into the screw hole is 10 to 60 degrees, the axis of the artificial dental root body Since the angle formed by the direction and the axial direction of the fixation assisting means is an acute angle, it is possible to simply and reliably perform the operation of rotating the fixation assisting means and implanting the artificial tooth root into the alveolar bone or the jawbone.
When the screw hole is provided in the side wall of the artificial dental root body, the fixation assisting means can be freely attached to the alveolar bone or the jaw bone according to the amount and thickness of the alveolar bone or the jaw bone and the form of the constriction of the jaw bone. Can be embedded, and fixation can be strengthened.
Further, when the screw hole is provided at the proximal end portion of the artificial dental root body, the fixation assisting means can be protruded perpendicular to the major axis direction of the implant. In this case, the fixation assisting means can bite into the relatively hard cortical bone among the alveolar bone or the jawbone, so that the fixation can be strengthened.
Further, when the screw hole is provided at the distal end portion of the artificial tooth root body, the artificial tooth root is bent as a whole by causing the fixation assisting means to protrude obliquely with respect to the major axis direction of the implant. Thereby, reinforcement of fixation can be aimed at.
Further, when there are a plurality of screw holes, a plurality of fixing assisting means can be provided, so that the fixing can be further strengthened.

Furthermore, when there are a plurality of screw holes, and each of the screw holes is radially and uniformly opened in the circumferential direction, the plurality of fixing auxiliary means are equally arranged in the circumferential direction, so that Such stress is dispersed, and fixation can be strengthened.
Further, when a direction indicating mark indicating the protruding direction of the fixing auxiliary means is formed at the proximal end portion of the artificial dental root body, the protruding direction of the fixing auxiliary means when the artificial tooth root body is embedded in the alveolar bone or the jawbone. It is possible to easily determine the direction of rotation of the artificial tooth root with the appropriate value.
Further, the dental implant of the present invention has the above artificial tooth root, an abutment that is fixed to the proximal end side of the artificial tooth root body, and a crown that is fixed to the abutment. It is possible to obtain a dental implant having a high fixing strength and a significantly shortened stable period.
Furthermore, the life of the dental implant can be extended.

[1] Artificial tooth root The artificial tooth root according to the present embodiment includes fixing auxiliary means and a screw hole.
The “artificial tooth root” is not particularly limited in its structure, size, shape, material, quantity, etc. as long as it is embedded and fixed in the alveolar bone or the jawbone. A direction indication mark indicating the protruding direction of the fixing auxiliary means can be formed at the proximal end portion of the artificial tooth root body.
The “fixing assisting means” is not particularly limited as long as it is provided in the artificial dental root body and strengthens the fixation with the alveolar bone or the jawbone. This fixing auxiliary means is a screw-like body, and can protrude from the inside of the artificial tooth root body toward the outside.
As long as the above-mentioned “screw hole” allows the screw-like fixing auxiliary means to protrude outward from the inside of the artificial root body, and the fixing auxiliary means is screwed to the artificial tooth root body, the number, direction, A bore diameter etc. are not specifically limited. Further, the screw hole can be appropriately arranged at an arbitrary position from the distal end portion to the proximal end portion of the artificial tooth root body according to the design.
In addition, the screw hole may be a screw-shaped body fixing auxiliary means that can protrude from the artificial dental root body toward the alveolar bone or jaw bone, and the fixing auxiliary means fixes the alveolar bone or jaw bone and the artificial dental root body. The insertion hole may not have an internal thread.

[2] Dental Implant The dental implant according to the present embodiment includes an artificial tooth root, an abutment, and a crown.
The “artificial tooth root” includes the fixing auxiliary means and the screw hole, and is as described above.
The “abutment” is not particularly limited in its structure, size, shape, material, quantity, etc. as long as it is connected to the artificial root and the crown is fixed.
As long as the “dental crown” is connected to the abutment, the structure, size, shape, material, quantity, and the like are not particularly limited.

Hereinafter, the present invention will be specifically described with reference to the drawings.
(1) Configuration of Example As shown in FIG. 1, the artificial tooth root according to this example includes an external screw portion 6 formed on the outer peripheral surface and an internal portion formed from the proximal end portion 7 toward the distal end portion 8. A receiving hole 9 having a screw and a fixation assisting means 10 for strengthening fixation with the alveolar bone or the jawbone 2 are provided. The artificial dental root body 3 is made of titanium, and is embedded and fixed by screwing the external screw portion 6 into the alveolar bone or the jawbone 2.
Although the material of the said artificial dental root main body is not specifically limited, A ceramic, titanium, a titanium alloy, etc. are mentioned, Among these, titanium and a titanium alloy are preferable.
Further, the artificial root main body 3 is provided with a receiving hole 9 to which the abutment 4 is fixed, and is a cylindrical body whose tip is blocked. The receiving hole 9 is to be screwed with a set screw 13 for fixing the abutment 4 to the artificial root body 3.
As shown in FIG. 1, the dental implant 1 according to the present embodiment includes an artificial root 3 body that is embedded and fixed in an alveolar bone or a jawbone 2, and an abutment 4 that is coupled to the artificial root body 3. And a crown 5 coupled to the abutment 4.

The fixing auxiliary means 10 is a screw-like body. A screw hole 11 is formed in the side wall of the artificial tooth root body 3 so as to penetrate the inside and outside of the artificial tooth root body 3 and to which the fixing auxiliary means 10 is screwed.
Here, the side wall portion refers to a portion between the base end portion 7 and the tip end portion 8. That is, when the artificial tooth root body 3 is a cylinder, it is a side wall part that forms the cylinder, and is a part of the side wall part that is formed in the long axis direction of the artificial tooth root body 3 and includes the external screw part 6. (The same applies hereinafter).
The direction of the screw hole 11 into which the fixing auxiliary means 10 is screwed is set to an angle at which the fixing auxiliary means 10 can be inserted and screwed from the base end portion 7 side of the receiving hole 9 of the artificial tooth root body 3. Specifically, the screw hole 11 provided in the artificial tooth root body 3 has an axial direction in which the fixing auxiliary means 10 screwed into the screw hole 11 extends from the proximal end to the tip of the artificial tooth root body 3. The angle between the axial direction of the artificial root main body 3 and the axial direction of the fixing auxiliary means screwed into the screw hole is 10-60. A range of about degrees is preferable, and more preferably 30 to 45 degrees.

The length of the fixing auxiliary means 10 is not particularly limited, but is 0.1 to 1.5 times the axial length of the artificial dental root body 3 with respect to the axial length of the artificial dental root body 3. Is preferable, and a length of 0.3 to 0.8 times is more preferable.
Moreover, the material of the fixing auxiliary means 10 is not particularly limited, but titanium and a titanium alloy are preferable.

Further, the diameter of the screw hole 11 and the diameter of the fixing auxiliary means 10 are set to be shorter than the diameter of the receiving hole 9. Thereby, the fixation assisting means 10 can be embedded in the alveolar bone or the jawbone 2 by screwing from the screw hole 11 from the inside of the artificial dental root body 3 to the outside through the receiving hole 9.
Also, two screw holes 11 are provided, and two fixing auxiliary means 10 screwed into the screw holes 11 are provided.
The number of screw holes 11 and fixing auxiliary means 10 provided in the artificial tooth root when a plurality of fixing auxiliary means 10 are provided is preferably in the range of 2-8, more preferably 2-4. The number of the screw holes 11 and the fixing auxiliary means 10 in the case where a plurality of fixing auxiliary means 10 are used is arbitrarily selected depending on the state of the alveolar bone or the jaw bone to be treated.

  Further, as shown in FIG. 2, for each fixing auxiliary means 10 and screw hole 11, one fixing auxiliary means 10 and screw hole 11 are positioned on the opposite side of the other fixing auxiliary means 10 and screw hole 11. Has been placed. That is, as shown in FIGS. 2 and 3, when there are a plurality of fixing auxiliary means 10 and a plurality of screw holes 11, it is preferable that each of the screw holes is opened radially and uniformly in the circumferential direction. Thereby, when providing the some fixation assistance means 10, it arrange | positions equally in the circumferential direction rotated when the artificial dental root main body 3 is embedded in the alveolar bone or the jawbone 2.

As shown in FIGS. 2 and 3, the base end portion 7 of the artificial root 3 is formed with a direction indicating mark 12 indicating the protruding direction of the fixing assisting means 10.
2 and 3, the direction indication mark 12 is a straight line, but the direction indication mark 12 is not particularly limited as long as it indicates the protruding direction of the fixing auxiliary means 10. For example, the shape of the direction indication mark includes a shape such as a straight line, a round shape, a triangle, a quadrangle, a diamond shape, and an arrow shape. Furthermore, the method for forming the direction indication mark on the base end is not particularly limited. For example, it can be formed by coloring or the like by printing or the like, or can be formed by engraving the above shape in the base end portion. They can also be combined.

  In the dental implant 1 according to this embodiment, the abutment 4 is fixed to the artificial dental root body 3 by a set screw 13 as shown in FIG. The artificial tooth root body 3 is provided with a receiving hole 9 having an internal thread. By screwing a set screw 13 into the hole 9 of the artificial tooth root body 3, the abutment 4 is placed at the end on the proximal end side of the artificial tooth root body 3. Fixed. Further, the crown 5 is fixed to the abutment 4 by the fixing screw 14. As the abutment 4 and the crown 5, those having a known or new structure can be used as appropriate.

(2) Operation of Example A procedure for mounting the artificial dental root body 3 and the dental implant 1 according to the above-described example to the alveolar bone or the jawbone 2 will be described.
The fixing auxiliary means 10 is screwed into the screw hole 11 of the artificial root main body 3 in advance. At this time, the distal end portion of the fixation assisting means 10 is set so as not to protrude outside the artificial root main body 3. In this state, the artificial dental root body 3 is screwed into the alveolar bone or the jawbone 2 and embedded. Then, the screwing is stopped so that the direction indication mark 12 of the proximal end portion 7 of the artificial dental root body 3 is in an appropriate position such as avoiding nerves with respect to the alveolar bone or the jawbone 2.
Here, if necessary, after drilling with respect to the alveolar bone or the jawbone 2, the fixation assisting means 10 is screwed so that it protrudes outside the artificial root body 3 and does not interfere with the internal thread of the receiving hole 9.
In addition, the said drilling is performed through the screw hole 11, In that case, the screw hole 11 has a preferable insertion hole which does not have a screw thread.
Further, the abutment 4 is mounted on the artificial tooth root body 3 and fixed with the set screw 13. Then, the crown 5 is attached to the abutment 4 and fixed with the fixing screw 14.

(3) Effects of the Example According to the present example, the fixation assisting means 10 for strengthening the fixation with the alveolar bone or the jawbone 2 is provided in the artificial dental root body 3, so that the fixation strength of the artificial dental root can be increased. . And since an artificial tooth root is not increased unlike the past, it can suppress that it enlarges.
Further, since the direction indication mark 12 indicating the protruding direction of the fixation assisting means 10 is formed on the proximal end portion 7 of the artificial dental root body 3, when the artificial dental root body 3 is embedded in the alveolar bone or the jawbone 2, the fixation assistance The direction in which the artificial tooth root body 3 is rotated can be easily determined by making the protruding direction of the means 10 appropriate.
Furthermore, the artificial tooth root body 3 is a cylindrical body whose front end is sealed, and the fixing auxiliary means 10 is set to an angle at which it can be inserted and screwed from the base end 7 side of the receiving hole 9 of the artificial tooth root body 3. Therefore, the long fixing auxiliary means 10 can be provided, and the fixing force can be increased.
Since the artificial dental root body 3 is embedded perpendicularly to the alveolar bone or the jawbone 2, the occlusal force applied to the crown 5 after mounting can be received straight.

Moreover, in this invention, it can be set as the Example variously changed within the range of this invention according to the objective and use, without being restricted to the said Example.
That is, in the above-described embodiment, the fixing assisting means 10 is provided on the side wall portion of the artificial dental root body 3. However, the present invention is not limited to this. For example, as shown in FIG. It may be. In this case, by causing the fixation assisting means 10 to protrude obliquely with respect to the major axis direction of the artificial tooth root body 3 (see FIG. 4B), the artificial tooth root has a bent shape as a whole. It can be strengthened. In this case, in order to rotate the fixing auxiliary means 10, it is preferable to use a driver having a so-called flexible shaft.
Alternatively, for example, as shown in FIG. 5, the fixation assisting means 10 may be provided at the proximal end portion 7 of the artificial dental root body 3. In this case, the fixation assisting means 10 can be projected perpendicularly to the major axis direction of the artificial tooth root body 3 (see FIG. 5B). As a result, the fixation assisting means 10 can be bitten into the relatively hard cortical bone on the surface layer of the alveolar bone or the jawbone 2, so that the fixation can be strengthened.

  Moreover, in the said Example, although the artificial root main body 3 is embedded perpendicularly with respect to the alveolar bone or the jawbone 2, it is not limited to this, For example, as shown in FIG. It may be. In this case, it is possible to receive the occlusal force by the fixing auxiliary means 10 by setting the fixing auxiliary means 10 to be vertical. In this case, contact with the nerve can be avoided by appropriately shortening the length of the fixation assisting means 10. Thereby, even when applied to a treatment method such as All on 4 in which the artificial root body 3 is inclined, the fixing force can be effectively increased.

Further, when the diameter of the receiving hole 9 provided in the artificial root main body 3 is reduced, etc., as shown in FIG. The fixing assisting means 10 may be provided without penetrating the inside and outside of the artificial tooth root body 3. Also in this case, the screw hole 11 provided in the artificial tooth root body 3 has an axial direction in which the fixing auxiliary means 10 screwed into the screw hole 11 extends from the proximal end of the artificial tooth root body to the tip. The angle between the axial direction of the artificial tooth root and the axial direction of the fixing auxiliary means screwed into the screw hole is in the range of about 10 to 60 degrees. Is more preferable, and 30 to 45 degrees is more preferable. Further, when a plurality of fixing auxiliary means 10 are used, it is preferable that each of the screw holes is opened radially and uniformly in the circumferential direction.
In this case, the diameter of the fixing auxiliary means 10 can be larger than the diameter of the receiving hole 9.

  Further, the above embodiment is a three-piece dental implant including an artificial tooth root, an abutment and a crown as shown in FIG. 1, but is not limited to this, and as shown in FIG. And a two-piece dental implant in which the abutment is integrated.

Further, when the diameter of the receiving hole 9 provided in the artificial tooth root body 3 is reduced and the shape of the artificial tooth root body 3 is not cylindrical, as shown in FIG. 9, the screw hole 11 into which the fixing auxiliary means 10 is screwed. May be provided so as to penetrate through the artificial tooth root body 3. In this case, the opening position of the screw hole 11 into which the fixation assisting means 10 is inserted in the artificial dental root body 3 is not particularly limited, but after the artificial dental root main body 3 is embedded in the alveolar bone or the jawbone 2, the fixation auxiliary means Since 10 penetrates the artificial dental root body 3 and is embedded in the alveolar bone or the jawbone 2, it is exposed from the alveolar bone or the jawbone 2 when the artificial dental root body 3 is embedded in the alveolar bone or the jawbone 2. It is preferable that an opening position of the screw hole 11 is provided in the portion of the artificial tooth root body 3 to be inserted so that the fixing auxiliary means 10 is inserted.
Also in this case, the screw hole 11 provided in the artificial tooth root body 3 is arranged so that the fixing auxiliary means 10 screwed into the screw hole 11 extends in the axial direction extending from the base end to the tip of the artificial tooth root body. The angle between the axial direction of the artificial tooth root and the axial direction of the fixing auxiliary means screwed into the screw hole 11 is 10 to 60 degrees. The range of the degree is preferable, and more preferably 30 to 45 degrees.

The present invention is widely applicable as a technique for fixing an artificial dental root to an alveolar bone or a jawbone, and is particularly suitable as a dental implant for enhancing the fixing force.
The artificial tooth root of the present invention significantly shortens the stable period for curing the connection between the artificial tooth root and the alveolar bone or the jaw bone by strengthening the fixing force of the artificial tooth root, and further extends the life of the dental implant. It is suitable as a thing.
Moreover, the implant etc. of this invention are used suitably other than an alveolar bone or a jawbone, and can be utilized also for medical implants other than dentistry.

It is an exploded assembly figure which shows the artificial tooth root and dental implant which concern on a present Example. It is a top view which shows the two direction indication marks formed in the artificial tooth root, and the two fixing assistance means which protruded. It is a top view which shows the three direction indication marks formed in the artificial tooth root, and the three fixing assistance means which protruded. It is a longitudinal cross-sectional front view which shows the artificial tooth root which concerns on another Example, (A) is before protrusion of a fixing assistance means, (B) shows after protrusion. It is a longitudinal cross-sectional front view which shows the artificial tooth root which concerns on another Example, (A) is before protrusion of a fixing assistance means, (B) shows after protrusion. It is a figure which shows the artificial tooth root which provided the artificial tooth root main body diagonally, and was set so that a fixing assistance means might become perpendicular | vertical. It is a longitudinal cross-sectional front view which shows the artificial tooth root which concerns on another Example. It is an exploded assembly figure which shows the artificial tooth root and dental implant which concern on the 2 piece type dental implant which concerns on another Example. It is a longitudinal cross-sectional front view which shows the artificial tooth root which concerns on another Example, Comprising: It is an exploded assembly figure which shows the artificial tooth root and dental implant which concern on a 2 piece type dental implant. It is the schematic which shows the dental implant of patent document 1.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1; Dental implant, 2; Alveolar bone or jawbone, 3; Artificial root body, 4; Abutment, 5; Crown, 6: External screw part of artificial root, 7; Proximal end part of artificial root, 8; Root tip, 9; receiving hole, 10; fixing means, 11; screw hole, 12; directional mark, 13; set screw, 14; fixing screw.

Claims (10)

An artificial tooth root body provided with a screw hole, and a fixing auxiliary means screwed into the artificial tooth root body through the screw hole,
The artificial root is characterized in that the fixing auxiliary means is a screw-like body and is embedded in the alveolar bone or jaw bone by screwing from the screw hole from the inside to the outside of the artificial tooth root body. The artificial tooth root according to claim 1, wherein the artificial tooth root body is a cylindrical body whose tip is blocked. The screw hole provided in the artificial tooth root body has a distal direction and an oblique direction with respect to an axial direction in which the fixing auxiliary means screwed into the screw hole extends from the base end of the artificial tooth root body to the tip. Is open and
The artificial tooth root according to claim 1 or 2, wherein an angle formed by an axial direction of the artificial tooth root main body and an axial direction of the fixing auxiliary means screwed into the screw hole is 10 to 60 degrees. The artificial tooth root according to any one of claims 1 to 3, wherein the screw hole is provided in a side wall portion of the artificial tooth root body. The artificial tooth root according to any one of claims 1 to 3, wherein the screw hole is provided in a proximal end portion of the artificial tooth root body. The artificial tooth root according to any one of claims 1 to 3, wherein the screw hole is provided at a distal end portion of the artificial tooth root body. The artificial tooth root according to any one of claims 1 to 6, wherein the screw hole is plural. The artificial tooth root according to claim 7, wherein when there are a plurality of screw holes, each of the screw holes is opened radially and uniformly in the circumferential direction. The artificial tooth root according to any one of claims 1 to 8, wherein a direction indicating mark indicating a protruding direction of the fixing auxiliary means is formed at a proximal end portion of the artificial tooth root main body. An artificial tooth root according to any one of claims 1 to 9, an abutment fixed to an end of the artificial tooth root main body on the proximal end side, and a dental crown fixed to the abutment. Dental implant characterized by

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