KR101293966B1 - Implant fixture - Google Patents

Abstract

PURPOSE: An implant fixture is provided to omit a bone transplantation process and to reduce the transplantation diameter of a bone. CONSTITUTION: An implant fixture comprises a body unit (110) which is comprised of one end (112) and the other end (114), a screw unit (120) which is formed with screw threads along the periphery of the body unit so that an implant fixture can be driven in a transplantation direction, a screw thread fixing unit (130) which is formed on the other end of the body unit and is formed with a fixing groove (136), and a recessed unit (140) which is concavely formed on the surface of the screw threads in the form of a dimple. The fixing groove is formed with a radial inner surface which is concave inside the body unit and a radial outer surface which protrudes in the reverse direction of a transplantation direction.

Description

Implant Fixtures {IMPLANT FIXTURE}

The present invention relates to an implant fixture, and more particularly, to increase the contact area with the bone tissue and to increase the bonding force to maintain a fixed force even when implanted to a shallow depth, it is possible to omit the process of bone graft, implanted to the same depth The present invention relates to an implant fixture that can be formed with a smaller diameter than the conventional case.

Generally, when permanent teeth are damaged by aging or other factors, artificial teeth are buried in the jaw bone. If the permanent tooth is damaged due to various factors and the damaged permanent tooth is extracted, artificial teeth can be replaced in place of the permanent tooth. By fastening the prosthetic implant component to the implant fixture embedded in the jawbone and combining the artificial tooth to the implant, the implantation of the artificial tooth is completed. A typical implant used to implant an artificial tooth consists of a fixture, an abutment and a screw, the fixture being inserted into the jawbone and coupled by a thread, and having an abutment in which the artificial tooth is fixed on the upper part of the fixture. The screw is coupled to the abutment in order to engage the fixture to couple the abutment to the top of the fixture. Typically, the fixture is threaded along the outer circumferential surface so that the fixture is fastened to the jawbone. However, if the implant is not fully coupled to the alveolar bone, the looseness of the implant fixture from the gum along the thread will loosen, and if a portion of the implant fixture is continuously applied while the part of the implant fixture is dismantled, a gap will be created in the implant fixture. The implant fixture detaches from the bone tissue as the load transmitted by it concentrates on a portion of the bone tissue.

In the related art, in order to prevent the implant fixture from being detached from the bone tissue, the implant fixture is implanted more than a predetermined depth. Therefore, when the jawbone is shorter than the depth at which the implant fixture is to be implanted, the jawbone is implanted to a depth where the implant fixture can be implanted, and then the implant fixture is embedded. However, in this case, not only does it take time for the implanted bone tissue to fully settle in the jaw bone, but also when the bone tissue is loaded by the implant fixture, because the rigidity of the bone tissue into which the implant fixture is inserted during implantation is different. It is not uniformly distributed but concentrated in one part of the bone tissue.

Therefore, in recent years, there is a need for an implant fixture having a wider bone contact area so that implant fixtures can be implanted without additional bone tissue transplantation, and the implanted implant fixture can be firmly fixed.

Patent Document 1: Registered Patent Publication No. 10-0594752

The problem to be solved by the present invention is to increase the binding force to the bone tissue to form a shallow depth or to form a narrow diameter to maintain a fixed force even in the implantation of the bone can be omitted, thereby implanting the implant It is to provide an implant fixture that can shorten the procedure and the duration of the procedure.

The present invention, in order to solve the above problems, in the implant fixture which is inserted into the bone tissue formed of cortical bone and spongy bone to form artificial tooth root,

A body portion provided with one end and the other end and having a cross-sectional area of the other end positioned in the direction inserted into the bone tissue narrower than the cross-sectional area of the one end formed in the opposite direction of the other end;

A thread portion formed with a thread along an outer circumferential surface of the body portion so that the implant fixture is driven in a rotational direction in which the implant fixture is placed in the bone tissue;

A thread fixing part formed at the distal end of the body part, the thread fixing part having a fixing groove recessed from the screw thread to the body part; And

It provides an implant fixture comprising a; recessed portion formed concave on the surface of the thread.

In addition, the present invention, in order to solve the above problems, in the implant fixture which is inserted into the bone tissue formed of the cortical bone and spongy bone to form artificial tooth root,

A tapered cylindrical body having one end and the other end and having a cross-sectional area of the other end located in a direction inserted into the bone tissue narrower than the cross-sectional area of the one end formed in the opposite direction of the other end;

It provides an implant fixture comprising a; recessed portion formed concave on the surface of the body portion.

According to one embodiment of the present invention, the implant fixture is preferably roughened.

In addition, the roughness treatment method of the implant fixture is preferably at least one of a blasting method, an acid treatment method or an RBM method.

In addition, the groove portion preferably has a diameter range of 1 μm to 3 mm.

In addition, the groove portion is preferably formed in an area of 10% to 90% of the total surface area of the body portion and the screw portion.

In addition, the fixing groove is preferably a radially outer surface is located in the opposite direction of the rotational insertion direction than the radially inner surface.

According to the present invention, by forming a concave groove on the surface to increase the bonding force with the bone tissue to be implanted to a shallow depth or even to reduce the diameter can be maintained a fixed force. Therefore, the implant fixture can be placed in the bone tissue even if the bone graft process is omitted, and the implanted state can be firmly fixed, thereby increasing the success rate of the implant procedure and the survival and durability of the implant. It is possible to shorten the procedure and duration of implantation.

1 is a perspective view of an implant fixture according to various embodiments of the present disclosure.
2 is a cross-sectional view taken along line AA ′ of FIG. 1B.
3 is a cross-sectional view showing a coupling relationship between the implant fixture and the bone tissue according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. However, these examples are intended to illustrate the present invention in more detail, it will be apparent to those skilled in the art that the scope of the present invention is not limited thereto.

The screw-type implant fixture has threads formed on the outer circumferential surface of the fixture body 110, and the cylindrical implant fixture is formed in a cylindrical shape so that the other end is tapered so that the cross-sectional area is narrower than one end. In this case, the cylindrical implant fixture may be formed a bending point that the difference in cross-sectional area between one end and the other end is sharp. Such an implant fixture is used as a fixing member for fixing prosthetics, such as dental and orthopedic surgeons, to bones. The bone tissue into which the implant fixture is inserted consists of spongy bone and cortical bone. The spongy bone is a relatively soft bone tissue inside the bone, and the cortical bone is harder than the spongy bone and generally forms a relatively thin film surrounding the spongy bone. Typically, since the spongy bone is provided at a position deeper than the cortical bone, when the fixture is inserted, the spongy bone is mainly placed in the spongy bone. At this time, a certain bone width and height are required to keep the implant fixture intact. Therefore, in general, it is necessary to implant artificial bone or autogenous bone to match the width and height of the bone to implant the implant.

The present invention provides an implant fixture that can be stably and firmly implanted even in shallow depths of bone by improving the bonding force with bone tissue even if the height and width of the jawbone are lower than the implantation depth of a general implant.

1 is a perspective view of an implant fixture according to various embodiments of the present invention. FIGS. 1A and 1B show various embodiments of a screw type implant fixture, and FIGS. 1C and 1D show a cylindrical type implant fixture. Various embodiments of are illustrated. 2 is a cross-sectional view taken along the line A-A 'of FIG. 1B.

In the implant fixture according to the present invention, as shown in Figures 1a and 1b, in the implant fixture to be inserted into the bone tissue formed of the cortical bone and spongy bone to form an artificial tooth,

It is provided with one end 112 and the other end 114, the body portion formed in the cross-sectional area of the other end 114 located in the direction inserted into the bone tissue narrower than the cross-sectional area of the one end 112 formed in the opposite direction of the other end 114 110;

A screw 120 having a screw thread formed along an outer circumferential surface of the body 110 to drive the implant fixture in an implantation rotational direction in which the implant fixture is placed;

A fixing part 130 formed at the other end of the body part 110 and having a fixing groove 136 recessed from the screw thread to the body part 110; And

It includes; grooves 140 formed concave on the surface of the thread.

In addition, the cylindrical implant fixture according to the present invention, as shown in Figures 1c and 1d, the present invention, in order to solve the above problems, is inserted into the bone tissue formed of the cortical bone and spongy bone to form an artificial tooth root For implant fixtures,

A cylindrical body having one end and the other end and having a cross-sectional area of the other end positioned in a direction of being inserted into the bone tissue narrower than the cross-sectional area of the one end formed in a direction opposite to the other end;

Includes a recess formed in the concave portion on the body surface.

First, the screw-type implant fixture is formed with a screw portion 120 along the outer circumferential surface of the body portion 110, a plurality of grooves 140 having a concave dimple shape such as the thread of the thread portion 120 and the body portion 110. By providing, roughness is given to the surface of an implant fixture primarily. Thus, after roughly implanting the implant fixture by placing the roughness on the surface, the bone tissue is regenerated to the inside of the recess 140, even if the implant fixture receives a load, the implant fixture in the opposite direction of the implant rotation direction along the threaded path The movement can be prevented. Here, the implantation rotation direction refers to a direction in which the implant fixture is rotated so that the screw tightening direction of the thread moves in the direction in which the bone tissue is embedded. For example, when the screw tightening direction of the implant fixture according to an embodiment of the present invention is clockwise, the implantation rotation direction is also clockwise. That is, when the implant fixture is rotated in the clockwise direction according to the placement rotation direction, the implant fixture is inserted into the bone tissue. In addition, the reverse implantation rotation direction or the reverse direction of the implantation rotation direction refers to the direction opposite to the implantation rotation direction, and refers to the direction in which the implant fixture is rotated to exit from the bone tissue. Therefore, when the installation rotation direction is clockwise, the reverse installation rotation direction refers to the counterclockwise direction. On the contrary, when the installation rotation direction is counterclockwise, the reverse installation rotation direction refers to the clockwise direction.

The implant fixture having the concave dimple 140 having a concave dimple shape is subjected to a gloss removal treatment on the surface of the trunk 110 and the screw 120, thereby primarily increasing the surface area of the implant fixture with increased bone area and bonding area. Will be increased one more time. Therefore, the friction force between the implant fixture and the bone tissue can be increased.

In addition, the cylindrical implant fixture also has a recessed portion in the body, thereby giving roughness to the surface of the implant fixture primarily. Cylindrical implant fixtures can also increase the friction between the implant fixture and bone tissue by secondly increasing the surface area of the implant fixture, which has primarily increased bone tissue and bonding area, by deglossing the surface of the body. . Hereinafter, the structure of the implant fixture according to the present invention will be described in detail by taking an implant fixture formed in a screw type, but the present invention is not limited thereto, but also applies to an implant fixture formed in a cylindrical shape. That is, the description of the body portion and the groove portion of the implant fixture formed of a screw type is equally applicable to the body portion and the groove portion of the cylindrical implant fixture.

A plurality of recesses 140 are disposed in the form of a concave dimple in the implant fixture. At this time, each of the grooves 140 formed on the surface of the implant fixture is preferably in the range of 1㎛ 3mm diameter. When the diameter of the recess 140 is less than 1 μm, the amount of bone tissue regenerated up to the inside of the recess 140 may not be enough to fix the recess 140. Therefore, when the implant fixture is continuously loaded, the bone tissue and the recess 140 are separated or the bone fixture is broken and the implant fixture is separated from the bone tissue. In addition, when the cross-sectional area of the groove portion 140 exceeds 3mm, the screw portion 120 is formed by the groove portion 140 so that the implant fixture is driven to rotate in the insertion rotation direction. Also, in this case, the implant fixture may break. Therefore, the groove 140 may be formed to have a diameter in the range of 1 μm to 3 mm to allow the bone tissue to fix the groove 140, and to allow the implant fixture to be smoothly placed along the rotational direction of the implant.

The implant fixture preferably has a fixation strength and fracture strength of 45N or more. That is, when a force of 45 N or less is applied, the bone tissue implanted in the recess 140 of the implant fixture is broken so that the implant fixture is removed, or the surface of the implant fixture is broken, and the state in which the bone tissue is coupled is not separated. Therefore, in the implant fixture according to the present invention, the recess 140 is preferably formed in an area of 10% to 90% of the entire surface area of the trunk 110 and the screw 120. When the recess 140 is formed in less than 10% of the total surface area of the trunk 110 and the screw 120, the amount of bone tissue that is implanted into the recess 140 to fix the implant fixture is insufficient. Even if a force of less than 45N is applied, the bone fixture breaks and the implant fixture separates from the bone tissue. In other words, if the fixing force is less than 45N and the chewing force is applied to the implant fixture, it is easily broken. In addition, when the groove portion 140 is formed in excess of 90% of the total surface area of the trunk portion 110 and the screw portion 120, the implant fixture is easily separated from the bone tissue while the surface of the implant fixture is broken. That is, the fracture strength of the implant fixture is less than 45N, so that the implant fixture is easily broken by the chewing force. Therefore, the recess 140 is preferably formed in an area of 10% to 90% of the total surface area of the body portion 110 and the screw portion 120.

In addition, the fixing groove 136, which is located at the other end 114 of the trunk portion 110 and is recessed from the screw thread to the trunk portion 110 at the other end 114 of the implant fixture, is shown in FIGS. 1B and 2. As shown in, connected to the radially inner surface 136b and the radially inner surface 136b formed on the inner side of the trunk portion 110 in the placement rotation direction and in the opposite direction of the placement rotation direction along the surface of the trunk portion 110. By forming the radially outer surface 136a having a sharply protruding shape, it can be more firmly coupled to the bone tissue. That is, the implant fixture is smoothly rotated by the spiral image of the screw part 120 when the implant fixture is implanted, not only firmly coupled to the bone tissue reproduced up to the position of the fixing groove 136, but also before, in the opposite direction of the implant rotation direction. It is to prevent reverse rotation. As described above, the radially outer side surface 136a of the fixing groove 136 is connected to the radially inner side surface 136b located in the inner side of the implantation rotation direction so that the implant fixture is smoothly implanted into the bone tissue. At the same time it can be prevented from detaching from the bone tissue. Here, in the case of a cylindrical implant fixture, the fixing groove 136 ′ is fixedly formed in the body portion 110 at the other end 114 ′ side of the implant fixture in a concave manner in the insertion rotation direction as shown in FIG. 1D. By forming the radially outer surface 136a 'of the groove 136' to be connected to the radially inner surface 136b 'and positioned in the opposite direction of the rotation of the implantation, the radially outer surface 136a' can be more firmly coupled to the bone tissue.

3 is a cross-sectional view showing a coupling relationship between the implant fixture and the bone tissue according to an embodiment of the present invention.

When the implant fixture according to an embodiment of the present invention is embedded in the bone tissue, as shown in Figure 3a, when the implant fixture is inserted into the bone tissue according to the spiral image of the screw 120, initially the bone tissue and groove 140 It will remain spaced apart. Subsequently, when a certain time elapses, bone tissue around the implant fixture is regenerated to the implant fixture surface, and as shown in FIG. 3B, bone tissue is inserted into the recess 140 according to the spiral path of the screw 120. Since the bone tissue located in the recess 140 is widened in contact with the implant fixture and the bone tissue, the bonding force is increased and the chewing force, which is the chewing force, prevents the implant fixture from being detached from the bone tissue. That is, even when the chewing force is continuously applied to the implant fixture, the bone tissue implanted in the recess 140 serves as a locking jaw, thereby firmly fixing the implant fixture in the bone tissue. Thus, the implanted implant fixture can be firmly fixed in the initial implanted position.

In order for the implant fixture according to the embodiment of the present invention to give a roughness to the surface, the implant fixture is preferably roughened. The roughened implant fixture may have a rough surface to increase friction with the regenerated bone tissue. The roughness treatment method applied to the implant fixture here is preferably at least one of a blasting method, an acid treatment method, or an RBM method.

As such, by forming the implant fixture according to the present invention, by implanting the implant formed in a shallow depth or a narrow diameter compared to the existing implant fixture, it is possible to omit the process of implanting bone separately when applying the implant fixture to bone tissue. Therefore, not only can shorten the implant procedure, but also the area of contact with the implant fixture and bone tissue is widened, and bone tissue is formed inside the recess of the implant fixture to be combined, thereby more firmly embedding the implant.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

110: body 112: once
114: other end 120: screw portion
130: thread fixing part 136: fixing groove
136a: radially outer side 136b: radially inner side
140: groove

Claims (8)

In the implant fixture which is inserted into the bone tissue formed of the cortical bone and the cancellous bone to form an artificial tooth root,
A body portion provided with one end and the other end and having a cross-sectional area of the other end positioned in the direction inserted into the bone tissue narrower than the cross-sectional area of the one end formed in the opposite direction of the other end;
A thread portion formed with a thread along an outer circumferential surface of the body portion so that the implant fixture is driven in a rotational direction in which the implant fixture is placed in the bone tissue;
A thread fixing part formed at the other end of the body part, the thread fixing part having a fixing groove recessed from the screw thread to the body part; And
Includes a plurality of grooves formed in the form of a dimple concave on the surface of the screw thread,
The fixing groove has a radially inner surface that is concave in the concave shape inside the body portion in the insertion rotation direction, and has a shape which is connected to the radially inner surface and protrudes in the opposite direction of the insertion rotation direction along the surface of the body portion. An implant fixture having a radially outer surface.
delete The method of claim 1,
The implant fixture, characterized in that the roughening process. The method of claim 3,
The roughness treatment of the implant fixture is at least one of a blasting method, an acid treatment method, and an RBM method. The method of claim 1,
The recess is an implant fixture, characterized in that the diameter range of 1㎛ 3mm. The method of claim 1,
The recess is an implant fixture, characterized in that formed in the area of 10% to 90% of the total surface area of the body portion and the threaded portion. delete delete

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