KR102120448B1 - Dental implants with biodegradable metal - Google Patents

Abstract

The present invention relates to a dental implant inserted into alveolar bone and, more specifically, to a dental implant with a biodegradable metal which can remove the risk of side effects by placing a separate biodegradable material with the implant to improve a bone fusion rate between the implant and the alveolar bone during implant placement.

Description

Dental implants with biodegradable metals {Dental implants with biodegradable metal}

The present invention relates to a dental implant that is inserted into the alveolar bone, a biodegradable metal that can remove the risk factor of side effects by placing a separate biodegradable material together with the implant to improve the bone fusion rate between the implant and the alveolar bone during implant placement It relates to a dental implant having a.

Dental implants refer to a series of procedures for implanting artificial teeth when natural teeth are lost. In other words, the implant procedure is to fix the artificial tooth after planting a fixture made of titanium, etc., which has no rejection in the human body, to the alveolar bone from which the tooth has escaped, so as to replace the lost root (root). This is a procedure to restore the function of the teeth.

In general, as a component used in the implantation procedure, a fixture that is placed as an artificial root using a predetermined drill, an abutment coupled to the fixture, and an abutment fixed to the fixture It includes an abutment screw and an artificial tooth coupled to the abutment.

Here, the fixture, which is one component of the implant, is a structure that is placed in a drill hole formed in the alveolar bone using a drill or the like at the position where the implant is being operated, and plays a role of an artificial root. Therefore, the fixture should be firmly placed in the alveolar bone.

For this reason, an implant screw is formed on the outer surface of the fixture to be firmly coupled to the inner wall portion of the alveolar bone forming the drill hole. The implanted screw thread is introduced into the alveolar bone so that the fixture and the alveolar bone can be firmly combined to strengthen the fixation force of the fixture.

As such, the implant procedure is to proceed to the stage of placing the fixture on the alveolar bone using a drill, and then, when the bone fusion proceeds, the abutment is combined with the fixture, and finally the artificial tooth (prosthesis) is covered.

However, the implant fixture according to the related art has insufficient blood supply to the alveolar bone around the implanted screw thread, and the area of bone fusion between the fixture and the alveolar bone is insufficient, so even after several months of bone fusion period for healing, bone fusion to the alveolar bone has elapsed. It can also happen if it is not going to be dense. In addition, even in the case of insufficient bone fusion area between the fixture and the alveolar bone, or even when bone fusion between the fixture and the alveolar bone is formed at the initial stage of the fixture, if excessive bite pressure is applied due to food chewing, etc. for several years of use, around the fixture Damage to the alveolar bone can cause major implant failures such as shaking and dropping of the fixture.

Therefore, there is a need to develop an implant that promotes the creation of new bones after the implant is placed in a patient, minimizes alveolar bone damage, and increases the blood flow to the alveolar bone around the placement thread of the fixture.

1. Korea Registered Patent Publication No. 10-1122134 (2012.03.16.) 2. Korean Patent Publication No. 10-2017-0056330 (2017.05.23.) 3. Korean Patent Publication No. 10-2010-0108146 (2010.10.06.)

The present invention has been devised to solve the above-described technical problems, bone fracture or bone loss due to insufficient contact area or blood supply to the alveolar bone around the implantation thread during the implantation process, new bone formation process, and bone fusion process during the implant procedure. It is an object of the present invention to provide an implant having a biodegradable material including a fixture having a new composition that is fusionally fused to the alveolar bone by preventing the occurrence of a failure of the implant procedure due to insufficient production and damage to the alveolar bone.

In addition, the present invention, based on the 3D image data on the alveolar bone or teeth of a patient secured in advance, by fixing the fixture body, the placement thread and the biodegradable material binding portion and biodegradation portion formed thereon by using a metal 3D printer integrally Another object is to provide an implant with a biodegradable material capable of dramatically reducing the processability of the fabrication and implant.

In addition, the present invention minimizes the damage to the alveolar bone of the patient as much as possible, and the biodegradable substances such as magnesium or magnesium alloy provided on the outer circumferential surface of the titanium or zirconium fixture body are gradually melted in the bone, and calcium and phosphorus, the main components of the bone, are dissolved. After gathering them around, transforming them into bone-like shapes and tissues, and finally transforming them into the same tissues as new bones, increase the probability of success after the implant procedure and increase the contact area between the fixture and the alveolar bone Another object is to provide an implant having a biodegradable material capable of enhancing the binding force.

A dental implant having a biodegradable metal according to an embodiment of the present invention includes a body that is provided with an implant screw on an outer circumferential surface and is implanted in an alveolar bone; And an auxiliary biodegradable part coupled to the outer circumferential surface of the body.

The auxiliary biodegradable portion is a tip biodegradable portion coupled to the tip of the body; And a biodegradable metal having at least one of a rear end biodegradable portion coupled to the rear end of the body and in contact with the alveolar bone adjacent to the gum upon insertion of the body to prevent play of the rear end of the body.

In addition, the rear end biodegradable portion may have a larger diameter than the diameter of the body so as to protrude than the body.

In addition, the rear end biodegradable portion may be formed to contact the alveolar bone defect site of the subject.

In addition, the body is provided with a receiving groove for receiving the auxiliary biodegradable portion on the side, the receiving groove, a first binding groove formed in a band shape surrounding a portion of the outer peripheral surface of the body; A second binding groove forming a band shape surrounding the entire outer circumferential surface of the body; A third binding groove having a circular or elliptical cross section in which a part of the body is embedded; And a fourth binding groove having a polygonal cross section in which a part of the body is embedded.

In addition, both ends or one side is opened so that the tip biodegradable portion is coupled to the tip of the body, and the side is formed in a concentric or threaded corrugated tube shape, and the tip biodegradable portion is screwed with the tip of the body and fixed by a pressing method. In addition, the outer surface of the body coupled to the tip biodegradable portion may be a lattice structure.

In addition, both ends of the biodegradable rear end portion are opened to be coupled to the rear end of the body, and a side surface is formed in a concentric or threaded corrugated tube shape, and the rear end biodegradable portion is screwed to the body and fixed by a pressing method, and the tip end The outer surface of the body coupled with the biodegradable portion may have a lattice structure.

Further, at least one of the front end and rear end biodegradable portions has a constant inner diameter in the longitudinal direction, and an outer diameter of the front end or rear end of the body corresponding to at least one of the fixed end and rear end biodegradable portions may be constant. .

In addition, at least one of the front end and the rear end biodegradable portion may have an opening penetrating the side surface.

In addition, the lower end is opened on the front end side of the body and the receiving space is embedded in the inner direction of the body; And a main biodegradable portion at least partially filled inside the accommodation space, and at least one of the main biodegradable portion and the auxiliary biodegradable portion may include a biodegradable metal.

In addition, at least one of the tip of the body, the tip of the main biodegradable portion, and the tip of the tip biodegradable portion may be formed to be rounded to lift the mucosal membrane separating the maxillary sinus of the patient toward the maxillary sinus.

In addition, the biodegradable metal includes pure magnesium or a magnesium alloy, and the magnesium alloy includes strontium, HA (Hydroxy Apatite), silver (Ag), niobium, yttrium, and zirconium. , One or more of zinc and calcium can be mixed.

In addition, the main biodegradable part and the auxiliary biodegradable part are molded by a die casting method in the receiving space, or at least one of the body, the main biodegradable part, and the auxiliary biodegradable part is integrally molded by a method using a metal 3D printer or cold spray. Can be provided with a biodegradable metal.

In addition, the body may be provided with a body through-hole formed on the side so that the inside and the outside communicate.

In addition, the main biodegradable portion, the main biodegradable portion of the biodegradable metal is present; And at least a main biodegradation portion depression among the depressions formed by expanding the main biodegradation depression portion, and the main biodegradation depression portion may be disposed to face the body through hole.

In addition, the main biodegradation unit, the main biodegradation unit expansion portion for filling the body through hole; A main biodegradation part protruding part extending from the main biodegradation part extending out of the body; The main biodegradable portion may include at least an extended portion of the main biodegradable portion and an extended portion of the main biodegradable portion or a concave portion of the main biodegradable portion recessed inside the protruding portion.

In addition, the main biodegradable portion may gradually increase in cross-sectional area toward the tip direction.

In addition, the main biodegradable portion may contact a portion of the ceiling of the accommodation space on the rear end side of the accommodation space.

In addition, the tip biodegradable portion may include a tip through hole penetrating its side surface, and the tip through hole may communicate with at least the body through hole of the trunk through hole and the main biodegradable portion recessed portion.

In addition, the body is formed so as to gradually decrease in diameter toward the direction of insertion into the alveolar bone, and the length of the thread extending from the body gradually increases so that the distance from the center of the body to the edge of the thread is increased. It can be kept constant.

The present invention is filled with magnesium or magnesium alloy (collectively referred to as a'biodegradation unit') having a biodegradable characteristic that decomposes in the human body on the outer circumferential surface of the body made of titanium, while gradually decomposing from the body placed in the body New bones are created in place, so that the alveolar bone and the body can be firmly connected.

In addition, the present invention may have an effect of increasing the blood flow to the alveolar bone around the implant, increasing the amount of bone, maintaining a healthy state of the alveolar bone, shortening the implant treatment period, and further enhancing bone fusion between the alveolar bone and the body. .

1 is a cross-sectional view showing an embodiment of the present invention is placed in the alveolar bone.
Figure 2 is a perspective view showing the main body and main biodegradable portion of the present invention.
Figure 3 is a cross-sectional view showing an embodiment of the main body and the main biodegradable portion of the present invention.
Figure 4 is a cross-sectional view showing an embodiment of the body of the present invention.
Figure 5 is a cross-sectional view of various embodiments of the receiving space and the main biodegradation unit of the present invention.
Figure 6 is a cross-sectional view of various embodiments of the body and the through hole of the present invention.
Figure 7 is a cross-sectional view showing the connection relationship between the body and the through hole of the present invention.
8 is a perspective view showing a connection relationship between the body and the through hole of the present invention.
9 is a perspective view showing an embodiment of the body and the threads of the present invention.
10 is a cross-sectional view of one embodiment of the body and the through hole of the present invention.
11 is a cross-sectional view of one embodiment of a body and a through hole of the present invention.
12 is a cross-sectional view showing a state in which another embodiment of the body of the present invention is placed in the alveolar bone.
13 is a perspective view showing another embodiment of the body of the present invention.
14 and 15 are cross-sectional views showing various embodiments of the receiving groove of the present invention.
16 is a cross-sectional view showing an embodiment in which the body of the present invention is placed in the maxillary sinus.
17 is a side view showing various embodiments of the auxiliary biodegradation unit of the present invention.
18 and 19 are side views showing another embodiment of the auxiliary biodegradation unit of the present invention.
20 and 21 are side views showing another embodiment of the auxiliary biodegradation unit of the present invention.
22 is a side view showing an embodiment of a combination of the second biodegradable portion and the body of the present invention.
23 is a side view showing various embodiments of the second biodegradable portion of the present invention.
24 is a side view showing another embodiment of the body and the threads of the present invention.
25 is a partial cross-sectional view showing an embodiment in which the body and the second biodegradation unit of the present invention are combined and another embodiment of the main biodegradation unit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the implant according to the present invention may be used for dental and general surgical implants. Dental implants can be applied to both internal, external, and integral connections. In addition, the fixture (body) can be applied to both a straight shape, a root shape (wedge shape), or a jar shape.

1 to 6, the dental implant having a biodegradable metal according to an embodiment of the present invention may include a body 10 and a main biodegradation unit 100.

The body 10 is formed to extend to a predetermined length, and can be placed in the alveolar bone 4 after cutting the patient's gum 2. When the body 10 is placed in the alveolar bone 4, the threads 11 are spirally formed on the outer surface of the body 10 to increase the bonding force between the body 10 and the alveolar bone 4 It can be formed to extend along the side.

The body 10 may be screwed with an abutment. It can be combined with the abutment artificial teeth (6). It can be a custom abutment, a tailor-made abutment that is tailored to the shape of the gums and teeth of each patient.

The portion of the body 10 that is placed on the alveolar bone 4 will be referred to as a front end, and a portion combined with the abutment as a rear end. A lower end is opened on the front end side of the body 10 and a receiving space S embedded in the inner direction of the body 10 may be formed. The accommodation space S may preferably have a cylindrical shape or a polygonal column shape.

Referring to FIG. 5, the accommodation space S may have a shape in which the cross-sectional area becomes narrower or wider toward the tip direction in addition to the column shape. The accommodation space S may be formed to be stepped in the vertical direction. For example, as shown in FIG. 5(d), the accommodation space S may include a protrusion accommodation space S0 protruding in a rear end direction.

Body 10 may be provided with at least one of the inner surface irregularities (S1) and the ceiling surface irregularities (S2) on the inner surface of the receiving space (S). The inner surface concavo-convex portion S1 and the ceiling surface concavo-convex portion S2 may have various shapes that can increase the inner surface area of the accommodation space S. The inner surface irregularities S1 may be formed in a specific shape such as a female thread. The inner surface irregularities S1 may be disposed on the inner wall of the accommodation space S, and the ceiling surface irregularities S2 may be disposed at the ceiling portion of the accommodation space S.

The inner surface concavo-convex portion S1 and the ceiling surface concave-convex portion S2 may increase the area of the accommodation space S to increase the area of bone fusion. Thereby, the bonding force between the body 10 and the alveolar bone 4 can be further improved.

The body 10 may have a rim uneven portion S3 disposed at the tip. The rim irregularities S3 may have various shapes such as a triangular pattern, a wave pattern, and a sawtooth pattern along the circumference of the lower end of the body 10. The rim irregularities (S3) may have a self-tapping function, which is a function of cutting the alveolar bone 4 when the body 10 is placed.

The main biodegradation unit 100 may be disposed in the accommodation space S of the body 10. The main biodegradation unit 100 is integrated with the accommodation space S, such as being integral with the accommodation space S, being a part of the accommodation space S, or protruding outside of the accommodation space S, It can vary.

The main biodegradation unit 100 may be started from a part of the ceiling of the accommodation space S, as shown in FIG. 5(a). This may fill the gap between the body 10 and the main biodegradation unit 100 such as alveolar bone fragments or blood, thereby improving the area in contact with the main biodegradation unit 100.

The main biodegradation unit 100 may be formed in a conical shape or a spiral shape in which its cross-sectional area gradually decreases toward the tip of the body 10. This conical shape is formed while the main biodegradation unit 100 is formed with an empty space between the rear end direction of the receiving space S and an empty space therebetween (see Fig. 3), or integral with the receiving space S (See FIG. 5(b)).

The main biodegradation unit 100 may gradually increase in cross-sectional area toward the tip. This may increase the area in which the main biodegradation unit 100 in the distal direction contacts the alveolar bone, and may provide an effect of strengthening the mechanical strength of the body 10 after the main biodegradation unit 100 disappears. Examples of the gradual increase in the cross-sectional area of the main biodegradation unit 100 are illustrated in FIGS. 5C and 5D, but are not limited thereto.

In addition to affecting the mechanical strength of the body 10, the protruding receiving space S0 of FIG. 5(d) may be a portion that is screwed with the main biodegradation unit 100. That is, the protruding receiving space S0 is formed of a female screw, and the protruding portion (the part corresponding to the protruding receiving space S0) of the main biodegradable unit 100 may be formed of a male screw.

The front end portion of the main biodegradable portion 100 may be flat, as shown in FIG. 5, or rounded, such as a semicircle or oval. This may be advantageous for lifting the mucous membrane of the maxillary sinus described below. The front end portion of the main biodegradation unit 100 may have grooves or irregularities, thereby increasing the cross-sectional area with the alveolar bone.

The main biodegradable unit 100 may be biodegradable in the oral cavity over time. The main biodegradation unit 100 may be biodegradable in the oral cavity, in particular, fused with the alveolar bone 4.

The main biodegradable unit 100 may be provided with a biodegradable metal or may be composed of a biodegradable metal.

The biodegradable metal refers to a metal having a property of dissolving and disappearing in vivo after a certain period of time, in contrast to a general metal material that does not melt in vivo. The biodegradable metal may include at least one metal or metal alloy of magnesium, calcium, manganese, iron, zinc, silicon, yttrium, strontium, silver (Ag), zirconium, niobium, gadolinium have.

The main biodegradation unit 100 is preferably a magnesium or magnesium alloy is used among the biodegradable metal. In this case, the magnesium alloy may be a metal material in which at least one of strontium, silver (Ag), niobuim, yttrium, zirconium, HA (Hydroxy Apatite), zinc, and calcium is mixed with magnesium.

The main biodegradation unit 100 gradually dissolves in the receiving space S of the body 10 and collects calcium and phosphorus, which are the main components of the bone, around to create bone or change into a bone-like shape and tissue, and receive space ( The contact force of the body 10 can be improved by contacting the inner and outer surfaces of the S) with the changed tissue.

According to various experiments, it was confirmed that not only the new bone is replaced in the place where the biodegradable metal disappears, but also a new bone is generated in the region where the alveolar bone around the biodegradable metal is deficient, so that the alveolar bone defect site is changed into bone tissue. . It appears that the biodegradable metal is due to the reason for improving bone proliferation. In addition, it was confirmed that the bone tissue proliferated or produced by the biodegradable metal is more firmly coupled with the remaining biodegradable metal (main biodegradable portion 100) or the body 10. In addition, the experiment showed that the larger the reaction area of the biodegradable metal with the subject's body, such as blood or residual alveolar bone, tissue, and tissue fluid, the better the bone proliferation. Also, alveolar bone seems to be an important factor for good bone formation and speed up bone growth. Therefore, it is preferable that the remaining alveolar bone is in contact with the main biodegradation unit 100, and that the remaining alveolar bone is disposed in a defective portion between the alveolar bone and the implant according to the present embodiment.

The body 10 may include a plurality of body through holes 12 communicating with the outside of the body 10 and the receiving space S. The plurality of trunk through holes 12 may be spaced apart at regular intervals, or may be arranged in an irregular pattern.

The body through-hole 12 is not only the main biodegradation unit 100 is not disposed therein (see FIG. 6(a)), but may be extended to the adjacent main biodegradation unit 100. That is, the main biodegradation unit 100 may be provided with a main biodegradation unit depression 102 in which a biodegradable metal is absent because it is recessed around the body through-hole 12 (see FIG. 6(b) ). The main biodegradation unit depression 102 may be formed in various shapes to increase its surface area. For example, a depression portion 104 (see FIG. 6(c)) to further depress the main biodegradation portion 100 may be provided.

Blood may be supplied to the receiving space (S) through the body through-hole 12 in which the main biodegradation unit 100 is not disposed, the main biodegradation unit depression 102, and/or the depression expansion unit 104. . Due to this, it is possible to shorten the time in which the new bone is filled in the receiving space S and the through-hole 12 by reacting with the main biodegradation unit 100. The new bone formed in the body through hole 12 or the accommodation space S may be connected to the outer alveolar bone 4 of the body 10 to improve the bonding force between the body 10 and the alveolar bone 4.

Referring to FIG. 6(c), in another embodiment, the main biodegradation unit 100 may include a main biodegradation unit expansion unit 106 filling the body through-hole 12. The main biodegradation unit extension 106 may include a main biodegradation unit projection 107 protruding out of the body 010. The main biodegradation unit 100 may include a main biodegradation unit recess 108 recessed inside the expanded or protruding portion.

The main biodegradable portion of the main biodegradable portion 100, the depressed portion 102 and/or the depressed portion expanded portion 104 may be used when a new bone is rapidly formed in the accommodation space S, and the main biodegradable portion expanded portion ( 106), the main biodegradation protrusions 107, and/or the main biodegradation recesses 108 have time to spare and can be used to make the new bones densely formed.

The main biodegradation unit 100 may be integrally molded into the receiving space S of the body 10 by a die casting method. For example, when the material of the body 10 is titanium or zirconium, the receiving space S may be first molded and then the biodegradable metal forming the main biodegradation unit 100 may be melted and filled into the receiving space S. have.

The main biodegradable portion 100 and the body 10 may be manufactured using a metal 3D printing method, a cold spray method, or the like.

Referring to Figure 7, the body through-hole 12 is communicated from the outer circumferential surface of the body 10 to the receiving space (S), a certain angle based on the virtual tangent (L) passing through to contact the outer surface of the body 10 (a) It may be formed to form a slope. The angle formed by the body through hole 12 may be set to an angle corresponding to the rotational direction of the body 10 when the body 10 is placed in the alveolar bone 4.

The constant angle (a) is preferably set to be an acute angle range based on the rotation direction of the body 10. This will shorten the time for the formation of new bone in the receiving space (S) as the residue of the alveolar bone (4), which occurs when the body 10 is placed, passes through the body through hole (12) and enters the receiving space (S). Can be.

An embodiment of the present invention will be described with reference to FIGS. 8 to 11.

The thread 11 may be provided with a plurality of thread holes 11-1 passing through the thread 11 along the thread 11. The threaded holes 11-1 may have a pattern arranged at regular intervals and an irregular pattern. Due to the threaded hole 11-1, the alveolar bones 4 that sandwich the thread 11 may be in communication with each other. As the new bone is filled in the threaded hole 11-1, the bonding force between the body 10 and the alveolar bone 4 is improved.

The thread 11 may include a thread cutting portion 11-2 that cuts a part of the extended thread 11. The thread cutting portion 11-2 has a predetermined shape that is arranged from the edge of the thread to an adjacent portion of the body 10, and can be preferably cut into a triangular or trapezoidal shape. The thread cutting portions 11-2 may be spaced apart from each other along the extended length of the thread 11.

On the other hand, a thread through hole 11-3 for communicating the thread cutting portion 11-2 and the accommodation space S may be formed through the body 10. The threaded through hole 11-3 can penetrate the body 10 while maintaining a certain angle of inclination like the body through hole 12. Since the action effect corresponds to the body through hole 12, a detailed statement is omitted.

Due to the configuration of the body through-hole 12 of the present invention, the thread hole 11-1, the thread cutting part 11-2, and the thread through hole 11-3, the bonding force between the body 10 and the alveolar bone 4 is improved. And bone fusion between the main biodegradation unit 100 and the alveolar bone 4. That is, the newly generated bone (alveolar bone) forms a structure such as a mesh shape between the body 10 and the receiving space S, so that the bonding force and support force between the body 10 and the alveolar bone 4 can be very high.

Therefore, it is possible to completely prevent failures such as damage to the alveolar bone 4 due to periodontal inflammation occurring in the oral cavity or persistent occlusal pressure of the patient formed for food intake and implant dropping and shaking.

In addition, the fragments of the alveolar bone 4, which are deleted when the body 10 is placed, are accommodated in the body 10 and the accommodation space S, and fused together with the newly generated bone, thereby significantly reducing the occurrence of side effects and inflammation. .

The diameter of the body 10 of the present invention may vary, due to inflammation or the like, the bone 10 is absorbed and the body 10 lacks the alveolar bone 4 to be implanted, or due to anatomical structures such as the maxillary sinus and the lower jaw nerve. When the body 10 having a thin diameter is used, the inside may be filled with the main biodegradation unit 100 to improve the mechanical strength of the implant.

For example, when the essential specifications of the body 10 to be placed in the alveolar bone 4 as described above should be adopted to a certain length or less as a certain thickness, when the body 10 of the present invention is placed, the alveolar bone 4 and Since the bone fusion area can be maximized, a relatively short and small-diameter body 10 is also adopted to be placed in the alveolar bone 4. In addition, through the decomposition of the main biodegradation unit 100 provided in the receiving space S, it is possible to further promote the creation of new bone.

12 to 15, the body 10 may include an auxiliary biodegradation unit 200 coupled to an outer circumferential surface. The outer circumferential surface of the body 10 may be a structure that increases its surface area, such as an unevenness, a mesh, or a lattice structure, and the auxiliary biodegradation unit 200 may also be formed with a corresponding structure. Due to this structure, the bonding force between the auxiliary biodegradation unit 200 and the body 10 may be further improved.

When the auxiliary biodegradation unit 200 is coupled to the outer circumferential surface of the body 10, when the body 10 is placed in the alveolar bone 4, the auxiliary decomposition unit 200 is placed in contact with the alveolar bone 4, and the auxiliary decomposition The main component of the part 200 can be rapidly absorbed by the alveolar bone 4. The auxiliary biodegradation unit 200 may be coupled to the body 10 as well as the threads 11.

The auxiliary biodegradation unit 200 may also be biodegradable over time in the oral cavity, and may be made of a material that is biodegradable over time in human tissue, particularly, a biodegradable metal, or may include such a material. That is, the auxiliary biodegradation unit 200 may include a biodegradable metal. The biodegradable metal of the auxiliary biodegradation unit 200 may correspond to the biodegradable metal of the main biodegradation unit 100 described above, and detailed description thereof will be omitted.

The auxiliary biodegradation unit 200 promotes blood flow of the new bone generated in the alveolar bone 4 around the body 10, and at the same time, allows the biodegradation in the oral cavity to enlarge the bonding force between the body 10 and the alveolar bone 4 The implant strength of the body 10 may be increased.

On the outer circumferential surface of the body 10, a receiving groove 13, which is a configuration for coupling with the auxiliary biodegradation unit 200, may be further formed. The receiving groove 13 is formed on the outer circumferential surface of the body 10 and a number of threads 11, may have an embedded shape such as a groove or may be formed to penetrate the body 10. The receiving groove 13 may be formed by drilling, but is not limited to the above method, and when the body 10 is molded by a casting process, the receiving groove 13 may be formed within a limit that can be molded and removed. have.

The auxiliary biodegradable unit 200 may be coupled to the body 10 or the thread 11 in a band shape.

The receiving groove 13 is a first binding groove 13-1 formed in a band shape surrounding a part of the outer circumferential surface of the body 10 and a second binding groove 13 forming a band shape surrounding the entire outer circumferential surface of the body 10 -2) and at least one of a third binding groove (13-3, 13-5) having a circular or elliptical cross-section in which a part of the body 10 is embedded, and a fourth binding groove (13-4) having a polygonal shape It can contain. The shape of the receiving groove 13 is not limited to the above shape, and can be changed according to a user's easy design change.

In addition, the receiving groove 13 may be formed in the thread 11, may be formed in the corresponding portion of the thread 11 adjacent to the body 10. That is, when the body 10 is placed in the alveolar bone 4 in the state where the auxiliary biodegradation unit 200 is coupled to the receiving groove 13, the body 10 and the thread 11 and the alveolar bone when the body 10 is inserted A predetermined space is generated between (4), and as a new bone is generated in the alveolar bone 4 in this space, it is possible to prevent a gap between the body 10 and the alveolar bone 4 from occurring. In addition, it provides an effect that can also prevent the phenomenon of inflammation or side effects in the area.

In more detail, the receiving groove 13 may be formed continuously or only partially along the outer circumferential surface of the body 10 and the edge of the thread 11 and the valley 11a between the thread 11 and the thread 11. . When the receiving groove 13 is irregularly formed on the edge of the thread, the area in contact with the alveolar bone 4 increases, so that the bonding force between the alveolar bone 4 and the thread can be further improved.

15, the receiving groove 13 may have various shapes.

The receiving groove 13 may include a first binding groove 13a in FIG. 15(a). The first binding groove 13a may be formed as a groove so that a portion of the thread 11 and the bone 11a of the thread are cut, and the auxiliary biodegradation unit 200 may be filled.

In another embodiment of the receiving groove 13, the receiving groove 13 may be provided with a second binding groove (13b) of Figure 15 (b). In the second binding groove 13b, a groove is further formed on the inner side to increase the contact area with the generated bone to secure the bonding force of the body 10.

As another embodiment of the receiving groove 13, the receiving groove 13 may include a third binding groove 13c of FIG. 15(c). This third binding groove (13c) is formed deeper than the depth of the implant, and when the newly created bone is filled in the area, by firmly supporting the body (10), the body (10) is inserted alveolar bone (4) It can prevent easy withdrawal.

The body 10 and the auxiliary biodegradation unit 200 may be combined by a coupling method such as screwing, interference fitting, compression, welding, etc., and wet the surface of the body 10 on the auxiliary biodegradation unit 200 made of liquid. It can be produced by dipping.

A method of depositing the auxiliary biodegradation unit 200 on the body 10 may be used, and in this method, sputtering deposition may be used. This method can also be applied to the bonding method of the binding groove and the auxiliary biodegradation unit 200.

The method in which the auxiliary biodegradation unit 200 is inserted or coupled to the receiving groove 13 may be performed in various ways, such as pressing or assisting the TIG welding or laser pressing the auxiliary biodegradation unit 200 corresponding to the appearance of the binding groove 10. It can be used in any one of welding, electric resistance SPOT welding, MIG welding, CMT process welding, FSW welding, metal 3D printing, and cold spray. When the welding process is performed, the manufacturing process and time of the body 10 may be shortened.

It is possible to fuse the heterogeneous material receiving groove 13 and the auxiliary biodegradation unit 200 through a cold spray technique in which the auxiliary biodegradation unit 200 in powder form is attached to the body 10 made of titanium by spraying it. have.

Due to the material composed of the auxiliary biodegradation unit 200, phosphorus or calcium, which is advantageous for the generation of new bone, can be gathered around to help the creation of new bone, so that a large amount of strong bone can be generated. As a result, the auxiliary biodegradation unit 200 may be decomposed to generate a bone attachment site that is wider than the disappeared site.

At least one or a combination of the main biodegradation unit 100, the auxiliary biodegradation unit 200, and the body 10 may be manufactured using a metal 3D printing method or a cold spray.

Generally, there are several hollow caves (8) formed in the human face bone. The alveolar bone 4 is formed in the lower part of the maxillary sinus 8, and the thickness of the alveolar bone 4 has a different thickness depending on the person. The thickness of the alveolar bone 4 should be secured at least about 10 mm to 10 mm for the normal procedure of the implant (ie, the normal placement of the alveolar bone 4 of the body 10), but depending on the patient, the thickness of the alveolar bone 4 is Because it is thin, it may be necessary to perform separate maxillary sinus lifting. However, maxillary sinus stenosis may cause side effects such as sinusitis, operative time, prolongation of healing period, and increase in additional surgical cost due to rupture of the maxillary sinus mucosa.

Referring to FIG. 16, the body 10 may be implanted in the maxilla so that at least a portion of the receiving groove 13 formed on the outer circumferential surface of the body 10 can penetrate into a region that is the maxillary sinus 8 of the subject. That is, the auxiliary biodegradation unit 200 attached to the receiving groove 13 disposed in the maxillary sinus may be disassembled in the maxillary sinus 8 of the patient described above. The part of the maxillary sinus adjacent to the body 10 placed while lifting the mucous membrane of the maxillary sinus can be interpreted as a kind of alveolar bone defect. When the thickness of the alveolar bone 4 of the patient is smaller than the implantation length of the body 10, the receiving groove 13 is formed on a portion of the outer circumferential surface of the body 10 that penetrates into the maxillary sinus 8 of the patient, thereby assisting biodegradation. The part 200 may be disassembled inside the maxillary sinus 8. The auxiliary biodegradation unit 200 disposed in the maxillary sinus may allow the new bone to proliferate well in the defective area. The cut pieces of the alveolar bone 4 that are cut in the implantation process and placed inside the maxillary sinus may promote the formation of new bones 4a.

When the implant according to the present embodiment is performed, separate maxillary sinus lift surgery may not be performed. Even so, the success rate of the implant procedure can be increased.

17 to 23, the auxiliary biodegradation unit 200 is coupled to the distal end of the body 10 (one side end of the body 10 inserted into the alveolar bone 4) and placed in contact with the alveolar bone 4 It may be provided with at least one of the front end biodegradable portion and the rear end of the body 10 (the other end of the body 10 of the gum or alveolar bone 4) coupled to the rear end.

The first biodegradation unit 210, which is a type of the tip biodegradation unit among the auxiliary biodegradation units 200, may be implanted through a hole drilled in the alveolar bone 4 through the incised gum 2 of the patient. As the first biodegradation unit 210 is placed, the mucous membrane 31 provided to distinguish the maxillary sinus 8 may be lifted toward the maxillary sinus 8.

At this time, when inserting the body 10, so as not to damage the patient's mucous membrane 30, such as tearing, the lower portion of the first biodegradable portion 210 (top portion in the drawing, peak) is flat or draws a predetermined radius of curvature It can be formed to be round.

The method in which the first biodegradation unit 210 is coupled to the front end of the body 10 may be combined by compression, welding, metal 3D printing, cold spraying, screw coupling, interference fitting, etc., and the above-described auxiliary biodegradation unit 200 It is possible to select any one of the coupling method of the body 10.

The height of the first biodegradable portion 210 may be adjusted according to the thickness of the alveolar bone 4 of the patient, and the first biodegradable portion 210 having various heights may be provided to be changed and used according to the patient's condition. In addition, the auxiliary biodegradation unit 200 can be densely adjusted to the tip of the body 10 or densely vulnerable to adjust the amount of the auxiliary biodegradation unit 200 according to the patient's condition.

The first biodegradation unit 210 may have various cross sections. Since one surface in contact with the alveolar bone 4 has a thread shape, the fragment of the alveolar bone 4 remaining when the body 10 is placed can be smoothly accommodated to assist in bone formation.

Of the auxiliary biodegradation unit 200, the second biodegradation unit 220, which is a rear end biodegradation unit, is disposed in a region where the alveolar bone is defective, so that the new bone is proliferated well in the alveolar bone defect. As a result, the second biodegradation unit 220 may prevent the play at the rear end of the body 10.

The auxiliary biodegradation unit 200 may include a third biodegradation unit 230 wound along the bone 11a of the thread 11 of the body 10. The third biodegradable unit 230 is made of a material that is biodegradable in the oral cavity, and may be made of a magnesium alloy including magnesium. The third biodegradable portion 230 may be formed in a plurality of small diameters, and may be pre-made as a coiled coil to be inserted into the body 10 prior to the procedure.

Referring to FIG. 20, the front end biodegradable part of the auxiliary biodegradable part 200 is mounted on the front end of the body 10, and may include a fourth biodegradable part 240 having a corrugated tube shape on the side surface.

The fourth biodegradable portion 240 has a corrugated tube shape with an outer surface, and may have a cup biodegradable portion having an open shape on one side so as to be inserted into the front end of the body 10. The fourth biodegradable portion 240 may be stretched in a corrugated pipe shape to facilitate length adjustment. The other side of the fourth biodegradable portion 240 that is not opened may be formed in a semicircle shape, an ellipse shape, or a flat shape drawing a predetermined radius of curvature.

The front ends of the fourth biodegradable portion 240 and the body 10 may be screwed together. That is, the inside of the fourth biodegradable portion 240 is a female screw shape, and the tip of the body 10 corresponding thereto may be formed in a male screw shape.

The shape or shape of the corrugated pipe outside the fourth biodegradable portion 240 may be a concentric circle or a thread shape.

The operator can determine whether to use the fourth biodegradable unit 240 according to the patient's condition before the procedure. The combination of the fourth biodegradable part 240 and the body 10 may use metal 3D printing, cold spraying, compression, rolling, and extrusion methods. In the case of the interference fit, the thread 11 is not formed on a part of the front end of the body 10, so the interference fit of the fourth biodegradable part 240 may be achieved. The method of combining the fourth biodegradation unit 240 is not limited to the above method.

When the body 10 is inserted into the alveolar bone 4, the diameter formed by the fourth biodegradable portion 240 is preferably formed to be smaller than the diameter of the hole previously formed in the alveolar bone 4, thereby causing the fourth biodegradable portion As the 240 is infiltrated into the maxillary sinus 8, the mucous membrane is pushed up without damage, and a space in which new bones can be generated can be provided.

Referring to FIG. 21, the fourth biodegradable portion 240 may include a tube biodegradable portion having an open top and bottom side so that the front end of the body 10 is exposed. At this time, the front end of the body 10 may be screwed with the fourth biodegradable portion 240. In addition to the screwing method, various coupling methods mentioned above may be used.

A portion of the tip of the body 10 coupled with the fourth biodegradable portion 240 has a diameter such that the diameter when the fourth biodegradable portion 240 is coupled to the body 10 and the diameter formed by the body 10 are the same. It may be formed to be tapered by T° to be small.

When the body 10 and the fourth biodegradable portion 240 are screwed, the tip portion to which the fourth biodegradable portion 240 of the body 10 is coupled is a male screw, having the same diameter and outer diameter in the longitudinal direction, It is preferable that the inner diameter and the corrugation of the fourth biodegradable portion 240 as a female screw are the same in the longitudinal direction. Alternatively, the outer diameter of the tip portion of the body 10 and the inner diameter of the fourth biodegradable portion 240 are preferably the same in the longitudinal direction. This may enable the body 10 and the fourth biodegradable portion 240 to be screwed or forcibly fitted. In the case of screw tightening, it is preferable that the outer diameter of the body 10 and the inner diameter of the fourth biodegradable portion 240 substantially correspond to each other, and in the case of interference fit, the outer diameter of the body 10 is the inner diameter of the fourth biodegradable portion 240. It is preferred to be larger.

Throughout this specification, including the claims, unless specifically stated or to be interpreted including threads or threads, inner diameter, outer diameter, and diameter mean diameters excluding threads or threads.

The outer side of the fourth biodegradable portion 240 may be the same as the tapered angle of the outer side of the body 10, or may be straight.

22 and 23, the second biodegradation unit 220 may be coupled to the rear end of the body 10. The second biodegradable portion 220 may also have an open ring shape in the vertical direction, and wrinkles may be formed on the outer surface. The wrinkles formed on the outer surface of the second biodegradation unit 220 may be concentric circles or spirals. The outer surface of the second biodegradation unit 220 may be a thread shape corresponding to the center of the body 10.

The second biodegradable unit 220 may be screwed with the body 10. The second biodegradation unit 220 and the body 10 may be combined with various combinations of the aforementioned methods, such as interference fitting, in addition to screwing.

When the second biodegradation unit 220 and the body 10 are engaged, a diameter of a part of the rear end of the body 10 may have a smaller diameter than that formed by the body 10 so that a curved surface is not formed at the bonding site. In this case, the outer diameter of the rear end of the body 10 in the longitudinal direction is constant, and the inner diameter of the second biodegradation unit 220 may be constant. Thereby, the body 10 and the second biodegradable portion 220 may be combined by a general screw connection or may be easily fitted. The outer diameter of the rear end of the body 10 is preferably substantially the same as or larger than the inner diameter of the second biodegradation unit 220.

The outer diameter of the second biodegradation unit 220 may be gradually increased or constant in a rear end direction to correspond to the center of the body 10.

The outermost portion of the alveolar bone 4 can be easily lost. Accordingly, when the implant is placed, the rear end of the body 10 may be disposed in the alveolar bone with many defects. A predetermined gap may be formed between the rear end of the implanted body 10 and the alveolar bone defect site. Side effects such as inflammation may occur due to foreign matter or food stuck in the space according to the predetermined interval. The second biodegradable portion 220 may fill the defective portion in its shape, and by its function, cause a rapid bone fusion action, thereby preventing or reducing stomach side effects.

The diameter of the second biodegradable portion 220 may be larger than the diameter formed by the rear end of the body 10. When the diameter of the second biodegradable portion 220 is larger than the diameter of the body 10, a gap between the rear end of the body 10 and the alveolar bone 4 may not be generated, or may be suppressed or reduced.

For example, by combining the second biodegradable portion 220 to the existing body 10, a curved surface may be formed on the exterior of the implant. That is, the second biodegradable portion 220 may be coupled to protrude on the outer circumferential surface of the body 10. The second biodegradable portion 220 protruding from the body 10 can fill a defective portion of the alveolar bone adjacent to the gum, thereby preventing or reducing the gap between the defective portion and the body 10, and generating bone in the defective portion. It can promote more.

The shape of the second biodegradation unit 220 may have a shape corresponding to the open shape of the alveolar bone 4, prevent the exposed alveolar bone 4 from being exposed to the outside, and have a shape for rapid bone fusion action Can be.

The second biodegradable portion 220 is preferably formed to have a shape that fills the alveolar bone defect site of the subject. For example, the lower end of the second biodegradation unit 220 may have various shapes such as a diagonal line, a hemispherical shape, a square shape, an inverted triangle shape, and the like. That is, it is preferable to form the second biodegradation unit 220 so as to come into contact with the alveolar bone defect site of the person to be treated, and to maintain the mechanical strength of the implant while allowing good bone formation.

Referring to Figure 24, the diameter of the body 10 is formed to extend to have a diameter that gradually decreases in cross-sectional area toward the direction of insertion into the alveolar bone 4, and the thread 11, on the contrary, from the rear end of the body 10 It may be formed to gradually increase the length of the thread (11). That is, it is assumed that the virtual vertical line traversing the center of the body 10 is'L', the distance D1 between the end of the thread 11 adjacent to the rear end of the body 10 and the virtual vertical line L and the body 10 The distance between the end of the thread 11 and the virtual vertical line L adjacent to the front end of D2 may correspond to the same distance.

This has the purpose of minimizing the amount of alveolar bone (4) being deleted when the body (10) is placed in the alveolar bone (4). The threaded hole 11-1 is also formed in the above-mentioned thread 11 so as to have a constant pattern or an irregular pattern, thereby improving the bonding force of the body 10.

Referring to FIG. 25, the main biodegradation unit 100 is accommodated in the body 10 accommodation space S, and the second biodegradation unit 220 may be coupled to the top of the body 10. At this time, the upper end of the body 10 is preferably provided with a separate fixing rod 16 that can be screwed to the second biodegradation unit 220, the outer surface of the fixing rod 16 is a thread (16-1) ) May be formed.

The main biodegradation unit 100 accommodated at the front end of the body 10 may include a support biodegradation unit 110 protruding from the front end of the body 10. The insertion hole of the body is formed in the alveolar bone 4 for the implantation of the body 10. At this time, when the depth of the insertion hole is formed deeper, the supporting biodegradation unit 110 maintains contact with the alveolar bone 4 to form the bone Creation can proceed smoothly.

26 is a view of another embodiment of an implant according to the present invention. See FIGS. 1 to 25.

Referring to FIG. 26, the implant according to the present embodiment includes a body 10, and may include at least one of a main biodegradation unit 100, a front end biodegradation unit 240, and a rear end biodegradation unit 220. . For detailed description of each component, refer to the description of corresponding reference numerals in FIGS. 1 to 25.

The body 10 may have a thread 11 on the outside.

The front end biodegradable part 240 may be coupled to the front end of the body 10 in the direction of being placed in the alveolar bone, and the rear end biodegradable part 220 may be coupled to the rear end of the body 10. The front end biodegradation unit 240 and the rear end biodegradation unit 220 may respectively correspond to the fourth biodegradation unit 240 and the second biodegradation unit 220 described above.

At least one of the front end biodegradation unit 240 and the rear end biodegradation unit 220 may have an opening penetrating the side surface.

The rear end biodegradation unit 220 may include a rear end through hole 22 penetrating the side surface. The tip biodegradable portion 240 may include a tip through hole 21 penetrating the side surface. Each of the front end through hole 21 and the rear end through hole 22 may have a circular, elliptical, square, or band shape, and a large number of these front end or rear end through holes 21 and 22 are gathered to biodegrade the front end and the rear end. A lattice structure or a mesh structure may be formed on the outer circumferential surfaces of the portions 240 and 220.

The front end penetration hole 21 and the rear end penetration hole 22 may allow the front end biodegradation unit 240 and the rear end biodegradation unit 220 to contact more tissues of a person to be treated, such as an alveolar bone or blood.

The tip through hole 21 may be in communication with the body through hole 12 of the body 10 described above, and may also be in communication with the depression 102 of the main biodegradation unit 100.

At least one of the tip of the body 10, the tip of the main biodegradable portion 100, and the tip of the tip biodegradable portion 240 is preferably formed to be rounded to lift the mucous membrane that distinguishes the maxillary sinus of the patient toward the maxillary sinus. The peak refers to a portion disposed in the direction of the front end of the body 10.

Or more, with reference to the accompanying drawings, an embodiment of the implant having a biodegradable portion according to the present invention has been described in detail. However, the embodiments of the present invention are not necessarily limited by the above-described embodiments, and it is natural that various modifications and equivalent implementations by a person skilled in the art to which the present invention pertains are possible. will be. Therefore, the true scope of the present invention will be defined by the claims below.

10: body 11: thread
12: through hole 13: receiving groove
100: main biodegradation unit 200: auxiliary biodegradation unit
210: first biodegradation unit 220: second biodegradation unit

Claims (19)

A body provided with an implanted thread on the outer circumferential surface to be placed in the alveolar bone; And
Includes; auxiliary biodegradable portion coupled to the outer peripheral surface of the body,
The auxiliary biodegradable part
A biodegradable front end coupled to the front end of the body; And
It is coupled to the rear end of the body, and is provided with at least one of the rear end biodegradation unit to prevent the play of the rear end of the body in contact with the alveolar bone adjacent to the gum when the body is inserted,
At least one of the front end and the rear end biodegradable portion is formed in a concentric circle or a threaded corrugated tube shape,
Both ends or one side of the tip biodegradable portion is open,
Both ends of the rear end biodegradable portion are opened,
At least one of the front end and rear end dissection of the corrugated tube is screwed to the body and fixed by a pressing method,
The outer surface of the body coupled with at least one of the front end and the rear end biodegradable portion is a dental implant having a biodegradable metal, which is a lattice structure. A body provided with an implanted thread on the outer circumferential surface to be placed in the alveolar bone; And
It is coupled to the outer peripheral surface of the body and includes an auxiliary biodegradable portion having a biodegradable metal;
The auxiliary biodegradable part
A biodegradable front end coupled to the front end of the body; And
It is coupled to the rear end of the body, and is provided with at least one of the rear end biodegradation unit to prevent the play of the rear end of the body in contact with the alveolar bone adjacent to the gum when the body is inserted,
At least one of the front end and the rear end biodegradable portion has a larger diameter than the diameter of the body,
The outer diameter of the rear end of the body coupled to the rear end biodegradable portion having a diameter larger than the diameter of the body is smaller than the outer diameter of the portion to which the auxiliary biodegradation portion of the body does not engage,
At least one of the front end and the rear end biodegradable portion has a constant inner diameter in the longitudinal direction,
A dental implant having a biodegradable metal having a constant outer diameter of at least one of a front end and a rear end of the body corresponding to at least one of a front end and a rear end biodegradable portion having a constant inner diameter. A body provided with an implanted thread on the outer circumferential surface to be placed in the alveolar bone; And
It is coupled to the outer peripheral surface of the body and includes an auxiliary biodegradable portion having a biodegradable metal;
The auxiliary biodegradable part
A biodegradable front end coupled to the front end of the body; And
It is coupled to the rear end of the body, and is provided with at least one of the rear end biodegradation unit to prevent the play of the rear end of the body in contact with the alveolar bone adjacent to the gum when the body is inserted,
At least one of the tip of the tip of the body and the tip of the biodegradable portion is formed to be rounded to lift the mucous membrane that separates the maxillary sinus of the patient toward the maxillary sinus, a dental implant with biodegradable metal. The method according to any one of claims 1 to 3,
The body is provided with a receiving groove for receiving the auxiliary biodegradation portion on the side,
The receiving groove,
A first binding groove formed in a band shape surrounding a part of the outer circumferential surface of the body;
A second binding groove forming a band shape surrounding the entire outer circumferential surface of the body;
A third binding groove having a circular or elliptical cross section in which a part of the body is embedded; And
A dental implant with biodegradable metal, comprising at least one of a fourth binding groove having a polygonal cross section in which a part of the body is embedded. delete delete delete The method according to any one of claims 1 to 3,
At least one of the front end and the rear end biodegradable portion having an opening penetrating the side surface, a dental implant having a biodegradable metal. The method according to any one of claims 1 to 3,
A receiving space that is opened at a lower end on the front end side of the body and is embedded in the inner direction of the body; And
It further includes a main biodegradation unit at least partially filled in the interior of the accommodation space,
The main biodegradable portion is provided with a biodegradable metal, a dental implant having a biodegradable metal. The method of claim 9,
The tip of the main biodegradable portion is formed to be rounded to lift the mucous membrane that separates the maxillary sinus of the patient toward the maxillary sinus, a dental implant with biodegradable metal. The method of claim 9,
The biodegradable metal includes pure magnesium or a magnesium alloy,
The magnesium alloy is strontium (strontium), HA (Hydroxy Apatite), silver (Ag), niobium (niobium), yttrium (yttrium), zirconium (zirconium), a mixture of one or more of zinc and calcium, biodegradable metal Equipped dental implant. The method of claim 9,
The main biodegradable portion and the auxiliary biodegradable portion are molded in the receiving space by a die casting method,
At least one of the main body, the main biodegradation unit, and the auxiliary biodegradation unit is a dental implant having a biodegradable metal that is integrally molded by a method using a metal 3D printer or a cold spray. The method of claim 9,
The body has a body through hole formed on the side so that the inside and the outside communicate, a dental implant with biodegradable metal. The method of claim 13,
The main biodegradable unit,
A main biodegradable depression portion in which the biodegradable metal is absent; And
At least one of the main biodegradation portion recessed portion of the depressed portion expansion portion formed by expanding the main biodegradation portion depression,
The main biodegradation portion recessed portion is disposed to face the body through-hole, a dental implant having a biodegradable metal. The method of claim 13,
The main biodegradable unit,
A main biodegradation part expansion part filling the through hole of the body;
A main biodegradation part protruding part extending from the main biodegradation part extending out of the body; And
A dental implant with biodegradable metal, comprising at least a main biodegradable portion extension of the main biodegradable portion extended portion and an extended portion of the main biodegradable portion protruding portion or a concave portion of the main biodegradable portion recessed inside the protruding portion. The method of claim 9,
The main biodegradable portion, the dental implant having a biodegradable metal, the cross-sectional area gradually increases as it goes toward the tip. The method of claim 9,
The main biodegradable portion is a dental implant having a biodegradable metal in contact with a part of the ceiling of the accommodation space on the rear end side of the accommodation space. The method of claim 14,
The tip biodegradable portion has a tip through hole penetrating its side surface,
The tip through hole is a dental implant having a biodegradable metal, which is in communication with at least the body through hole of the body through hole and the main biodegradation portion depression. The method according to any one of claims 1 to 3,
The body is formed so as to gradually decrease in diameter toward the direction of insertion into the alveolar bone,
The length of the thread extending from the body is gradually increased, the dental implant having a biodegradable metal that maintains a constant distance from the center of the body to the edge of the thread.

Images