KR102628916B1 - Bone fixing apparatus capable of adjusting fastening angle of fixed screw - Google Patents

Abstract

The present invention relates to an osteosynthesis device capable of adjusting the installation angle of a fixing screw. More specifically, the present invention relates to an osteosynthesis device that allows the installation angle of a fixing screw to be flexibly adjusted according to the fracture site, fracture pattern, shape of the segmental surface, bone density, etc., thereby allowing various It ensures versatility by being comprehensively applicable to cases. In addition, it not only ensures convenience of the procedure by easily specifying the installation direction of the fixing screw, but also guides the fixing screw to the optimal position to prevent various side effects due to improper positioning of the fixing screw. This relates to an osteosynthesis device capable of adjusting the installation angle of the fixation screw, which ensures surgical stability and satisfaction by minimizing surgical trauma and further minimizes surgical trauma.

Description

Osteosynthesis device capable of adjusting the installation angle of the fixing screw {BONE FIXING APPARATUS CAPABLE OF ADJUSTING FASTENING ANGLE OF FIXED SCREW}

The present invention relates to an osteosynthesis device capable of adjusting the installation angle of a fixing screw. More specifically, the present invention relates to an osteosynthesis device that allows the installation angle of a fixing screw to be flexibly adjusted according to the fracture site, fracture pattern, shape of the segmental surface, bone density, etc., thereby allowing various It ensures versatility by being comprehensively applicable to cases. In addition, it not only ensures convenience of the procedure by easily specifying the installation direction of the fixing screw, but also guides the fixing screw to the optimal position to prevent various side effects due to improper positioning of the fixing screw. This relates to an osteosynthesis device capable of adjusting the installation angle of the fixation screw, which ensures surgical stability and satisfaction by minimizing surgical trauma and further minimizes surgical trauma.

The human body is made up of several bones, including the skull, ribs, humerus, and clavicle. These bones of the human body can be fractured due to strong external shock or disease.

Generally, when a fracture occurs, treatment is performed to restore the fractured bone to its original state. This type of fracture treatment involves fixing the fractured bone until bone union occurs, and the fixation method is determined depending on the severity of the fracture.

At this time, if the degree of fracture is minor, the bone is fixed using casts or splints, but if the degree of fracture is severe, the skin and muscles are incised through surgery to expose the fractured bone, and then the bone is repaired using an osteosynthesis device. Fix it.

For example, an osteosynthesis device may be made up of a bonding plate and a set of screws, and its surgical method involves placing a bonding plate on the fracture site, then fastening the screws to the bone surface in screw holes formed in the bonding plate, thereby bonding the bone. The plate is maintained to connect and fix the segmented bones.

Since the screw is fixed by being installed at a certain depth on the surface of the bone using a conventional screw fixation method, the angle of installation with respect to the osteosynthesis plate or bone surface must be sufficiently considered before the procedure for stability and prevention of adverse effects and side effects.

For example, during the procedure, if the screw passes through the segmental surface of each bone, not only will secondary damage to the bone tissue occur, preventing bone healing, but the segmental area will also have relatively low bone density, causing serious side effects. A problem arises.

Therefore, determining the screw installation angle before the procedure and reflecting it in the actual procedure is the most important point in leading a successful procedure, but the screw hole of most plates has a structural problem in that it can only guide the screw in one designated direction. Also, since these procedures rely solely on the operator's experience, the accuracy and safety of the procedure cannot be guaranteed.

Registered Patent 10-1287837

The present invention was created to solve the above-mentioned problems in the prior art, by allowing the installation angle of the fixing screw to be flexibly adjusted according to the fracture site, fracture pattern, shape of the segmental surface, bone density, etc., so that it can be comprehensively used in various cases. It ensures versatility by making it applicable, and not only ensures the convenience of the procedure by easily specifying the installation direction of the fixing screw, but also guides the fixing screw to the optimal position to minimize the occurrence of various side effects due to improper positioning of the fixing screw, thus ensuring the stability of the procedure. The purpose is to provide an osteosynthesis device that can adjust the installation angle of the fixation screw to ensure satisfaction and minimize surgical trauma.

The present invention is a means for achieving the above object, and includes a plate portion having a plurality of fastening holes as a plate-shaped structure supported at the fracture boundary; and a jig part that is coupled to the inside of at least one of the plurality of fastening holes and guides the fixing screw to the center and determines the installation angle of the fixing screw.

In addition, the fixing screw includes a head having a first thread formed on the outer peripheral surface; and an installation body extending a predetermined length downward from the head and having a second screw thread formed on an outer peripheral surface, wherein a plurality of spline grooves extending in the vertical direction are spaced at equal intervals on the inner surface of each of the plurality of fastening holes. It is recessed, and a first fixing groove and a second fixing groove are formed to extend a certain length along the circumferential direction at an upper and lower height difference in each spline groove, and the jig part is made of a cylindrical structure that can be inserted into the fastening hole and has an outer side. A plurality of first guide protrusions that are inserted and guided into corresponding positions of the plurality of spline grooves are formed to protrude radially, and when the plurality of first guide protrusions match the height of the first fixing groove, the first guide protrusions 1 As it is rotated in place to be inserted into the fixing groove, it is supported by being caught in the first fixing groove and fixed, and a guide hole tilted at a certain angle with respect to the virtual horizontal plane is formed in the center to accommodate the head by tilting it at a certain angle to enable insertion. A guide bushing that guides the body to be installed on the bone at a certain angle tilted; and a cylindrical structure insertable into the fastening hole, wherein a plurality of second guide protrusions radially protrude and are disposed on the upper part of the guide bushing and are guided by being inserted into corresponding positions of the plurality of spline grooves. When the second guide protrusion matches the height of the second fixing groove, the second guide protrusion is rotated in place to be inserted into the second fixing groove, so that it is supported by the second fixing groove, sealing and fixing the open top of the guide bushing. Characterized in that it includes a cap.

In addition, the upper surface of the guide bushing is composed of a slope inclined at a certain angle so as to be parallel to the upper surface of the tilted head, and the lower surface of the cap facing the upper surface of the guide bushing is a slope inclined at a certain angle so as to be parallel to the upper surface of the guide bushing. It is characterized by being composed of.

In addition, a wedge groove is formed recessed in the center of the upper surface of the head, a wedge hole communicating with the wedge groove is formed through the cap, and a wedge pin in the shape of an upper light is fastened to the wedge groove and the wedge hole communicating with each other, A first friction protrusion is formed protruding on the outer surface of the wedge pin, a second friction protrusion is protruded on the upper surface of the guide bushing in the direction facing the cap, and a third friction protrusion is formed on the lower surface of the cap in the direction facing the guide bushing. It is characterized by protruding friction protrusions.

In addition, the jig part further includes a gasket made of an elastic material interposed between the guide bushing and the cap, and a cut line for the passage of the wedge pin is formed at a certain length in the center of the gasket.

The present invention ensures versatility by making it possible to flexibly adjust the installation angle of the fixing screw according to the fracture site, fracture pattern, shape of the segmental surface, bone density, etc., so that it can be comprehensively applied to various cases, and also allows the installation direction of the fixing screw. Not only does it ensure the convenience of the procedure by easily specifying it, but it also guides the fixing screw to the optimal position to minimize the occurrence of various side effects due to improper positioning of the fixing screw, thereby ensuring the safety and satisfaction of the procedure and further minimizing surgical trauma. Provides beneficial effects.

1 is a view showing an embodiment of a plate portion.
Figure 2 is a diagram showing the external configuration of the osteosynthesis device according to the present invention.
Figure 3 is a view showing the exploded configuration of the jig portion and the fixing screw.
Figure 4 is a diagram schematically showing the planar configuration of the osteosynthesis device according to the present invention.
Figure 5 is a diagram showing the exploded configuration of the jig portion.
Figure 6 is a cross-sectional view based on line AA shown in Figure 4, showing the state in which the fixing screw is tilted and adjusted to various angles by the jig part.
Figure 7 is a view showing an embodiment in which the wedge pin is formed integrally with the cap.
Figure 8 is a diagram showing a state in which a guide bushing is coupled to a fastening hole.
Figure 9 is a diagram showing a state in which the head is fastened to the guide bushing.
Figure 10 is a view showing a gasket seated on the guide bushing.
Figure 11 is a view showing a state in which the cap and wedge pin are fastened.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This example is provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that identical members in each drawing may be indicated by the same reference numerals. Detailed descriptions of well-known functions and configurations that are judged to unnecessarily obscure the gist of the present invention are omitted.

The osteosynthesis device according to the present invention can be broadly defined as including a fixing screw 10, a plate portion 20, and a jig portion 100.

First, the plate portion 20 is a plate-shaped structure supported at the fracture boundary and is entirely made of a metal material to provide sufficient strength and suppress corrosion resistance within the body.

The plate portion 20 may be modified in various shapes, sizes, and thicknesses depending on the degree of fracture, application area, etc., and may have a structure that is bent or curved at a certain angle depending on the case. However, they are all the same in that they are plate-shaped structures with a thickness.

A plurality of fastening holes 21 may be formed through the plate portion 20, and the above-described jig portion 100 and the fixing screw 10 are sequentially coupled to each fastening hole 21 to form the plate portion 20. can be fixed to a designated bone surface.

The jig portion 100 and the fixing screws 10 are connected to each other in all corresponding locations of each fastening hole 21 in pairs, or a specific fastening hole 21 is selected among each fastening hole 21. ) Only the jig part 100 and the fixing screw 10 pair can be selectively combined, and the coupling position of the jig part 100 and the fixing screw 10 can be arbitrarily determined by the operator depending on the fracture pattern of the bone. .

On the inner surface of each of the plurality of fastening holes 21, a plurality of spline grooves 22 extending long in the vertical direction may be recessed at equal intervals.

Each spline groove 22 can guide the jig part 100, which will be described later, in a straight line in the vertical direction at a specified angle.

In addition, the first fixing groove 23 and the second fixing groove 24 may be formed to extend a certain length along the circumferential direction with an upper and lower height difference in each spline groove 22.

That is, at a predetermined height of one spline groove 22, the first fixing groove 23 and the second fixing groove 24 are formed to extend a certain length along the circumferential direction of the inner surface of the fastening hole 21, respectively, so as to form a spline groove ( 22), the first fixing groove 23 and the second fixing groove 24 form a single channel.

The first fixing groove 23 and the second fixing groove 24 each serve to fix the guide bushing 110 and the cap 120 of the jig part 100, which will be described later.

Next, the fixing screw 10 includes a head 11 and an installation body 12, and in particular, is characterized in that threads are formed on both the head 11 and the installation body 12.

For example, a first screw thread (m1) may be formed on the outer peripheral surface of the head 11 of the fixing screw 10, and a second screw thread (m2) may be formed on the outer peripheral surface of the mounting body 12.

The head 11 can be accommodated inside the jig portion 100, and the implant 12 can be formed to extend a certain length downward from the head 11 and be implanted toward the bone.

In some cases, a part of the head 11 accommodated in the jig part 100 exposed to the lower part of the jig part 100 may be implanted into the bone at a certain depth, and in the attached drawings, the part of the head 11 exposed to the lower part of the jig part 100 may be installed. Although the diameter is exemplified to be larger than the diameter of the installation body 12, it is to be noted that they may be configured to have the same diameter.

It is natural that the upper surface of the head 11 may be provided with a connection groove 13 for connecting a torque generator, such as a drill or driver.

Next, the jig part 100 is coupled to the inside of at least one of the plurality of fastening holes 21 and guides the fixing screw 10 to the center to install the fixing screw 10 in a designated direction. Assist in making it happen.

That is, when installing the fixing screw 10 on the plate part 20 seated on the bone, the fixing screw 10 is not introduced as is into the fastening hole 21 of the plate part 20, but the pre-installed jig part ( By fastening to 100, the fixing screw 10 is installed in the correct direction, while the jig part 100 determines the installation angle of the fixing screw 10 in the optimal direction to ensure that the fixing screw 10 is installed. Make sure that (12) is not biased in an unwanted, unspecified direction inside the bone.

When coupling the jig part 100 to the fastening hole 21, the jig part 100 can be rotated at a certain angle to couple it in the desired direction. When the angle of the jig part 100 within the fastening hole 21 is determined, The installation angle of the fixing screw 10 can be determined by following the direction of the jig portion 100.

Therefore, when it is desired to install the fixing screw 10 in a desired direction, first, rotate the jig part 100 at a desired angle and couple it to the fastening hole 21, and then attach the fixing screw (100) to the jig part 100 arranged in this way. 10) is continuously fastened so that the fixing screw 10 can be implanted into the bone. The specific surgical procedure of the osteosynthesis device according to the present invention will be described later.

More specifically, the jig portion 100 may be largely illustrated as including a guide bushing 110, a cap 120, a wedge pin 130, and a gasket 140.

The guide bushing 110, cap 120, wedge pin 130, and gasket 140 are each individually constructed and constitute a single jig portion 100. In general, the guide bushing 110 and gasket 140 ) and the cap 120 can accommodate the head 11 inside while being stacked up and down within the fastening hole 21. In the case of the wedge pin 130, the cap 120 and the gasket 140 are They can penetrate each other and be driven straight into the center of the head (11).

First, the guide bushing 110 has a cylindrical structure that can be inserted into the fastening hole 21, and has a plurality of first guide protrusions 111 that are inserted and guided outward into corresponding positions of the plurality of spline grooves 22 in a radial direction. It consists of a structure that protrudes into.

By aligning each first guide protrusion 111 with each spline groove 22, the guide bushing 110 can be introduced into the fastening hole 21, and then, in the introduced state, into the lower part of the fastening hole 21. It can be moved in parallel.

At this time, when each first guide protrusion 111 matches the height of the first fixing groove 23 formed in the lower part of the spline groove 22, the first guide protrusion 111 is attached to the first fixing groove 23. When the guide bushing 110 is rotated in place to be inserted, the first guide protrusions 111 located in the spline groove 22 are simultaneously eccentric from the spline groove 22 and are inserted into the first fixing groove 23 to be supported. A structure can be established.

In this way, when the guide bushing 110 is rotated in the direction in which the first guide protrusion 111 is inserted into the first fixing groove 23, the vertical movement of the guide bushing 110 within the fastening hole 21 is limited. The bushing 110 can be fixed.

The guide bushing 110 has a hollow structure, and a guide hole 112 for guiding the fixing screw 10 may be formed in the center.

At this time, the guide hole 112 accommodates the fixing screw 10 and simultaneously provides the first thread (m1) of the head 11 so that it can be fastened to the head 11 part of the fixing screw 10 in a screw-coupled manner. ) may be formed into a third screw thread (m3) in which the threads are engaged.

In addition, the screw axis (Ax) of the guide hole 112 itself has a structure tilted at a certain angle with respect to the virtual horizontal plane, so that the head 11 is accommodated by tilting it at a certain angle, so that the installation body extends to the lower part of the head 11. The entire fixing screw 10, including (12), can be installed in a tilted state at a certain angle rather than being installed perpendicularly to the bone.

For example, when the screw axis (Ax) of the guide hole 112 is arranged perpendicular to the virtual horizontal plane, the screw axis of the head 11 that is screwed to the guide hole 112 is the screw axis of the guide hole 112. It is arranged parallel to the axis (Ax), so that the fixing screw (10) itself can be installed perpendicularly to the bone, and as in the present embodiment, the screw axis (Ax) of the guide hole (112) is relative to the virtual horizontal plane. When tilted at a certain angle, the fixing screw 10 guided into the guide hole 112 can have an installation direction parallel to the direction of the screw axis (Ax) of the guide hole 112.

Accordingly, since the installation body 12 itself can be installed by tilting it in a desired direction, it is possible to prevent the installation body 12 from being installed in an undesired area.

The cap 120 is disposed on the upper part of the guide bushing 110 disposed in the fastening hole 21 and connects the guide bushing 110 and the open upper part of the head 11 accommodated in the guide hole 112 of the guide bushing 110. It is a configuration for sealing, and, similar to the guide bushing 110, is made of a cylindrical structure that can be inserted into the fastening hole 21, and includes a plurality of parts that are inserted and guided outward into corresponding positions of the plurality of spline grooves 22. 2 The guide protrusion 121 has a structure in which the guide protrusion 121 protrudes radially.

In the case of the guide bushing 110, it has a hollow structure to allow the passage of the fixing screw 10, but in the case of the cap 120, it does not have a separate hollow part in that it seals the open part of the fastening hole 21. It is a characteristic.

However, a wedge hole 122 may be formed through the center of the cap 120 for the passage of the wedge pin 130, and the wedge hole 122 may be closed by the wedge pin 130.

When each second guide protrusion 121 is aligned with each spline groove 22, the cap 120 can be introduced into the fastening hole 21 and seated on the upper part of the guide bushing 110.

At this time, when each second guide protrusion 121 matches the height of the second fixing groove 24 formed on the top of the spline groove 22, the second guide protrusion 121 is attached to the second fixing groove 24. When the cap 120 is rotated in place to be inserted, the second guide protrusions 121 located in the spline groove 22 are simultaneously deviated from the spline groove 22 and are caught and supported by the second fixing groove 24, thereby forming the guide bushing. The position of the cap 120 is fixed so that the open top of the cap 110 can be sealed.

That is, the cap 120 is coupled to the guide bushing 110 and the fastening hole 21 described above in the same manner, but the only difference is that it is located on the upper part of the guide bushing 110.

Meanwhile, the upper surface of the guide bushing 110 may be configured as a slope inclined at a certain angle to be parallel to the upper surface of the tilted head 11.

In other words, when the fixing screw 10 is fastened to the guide hole 112 of the guide bushing 110, the upper surface of the head 11 is configured to be parallel to the upper surface of the guide bushing 110, forming a single plane. .

In addition, the lower surface of the cap 120 facing the upper surface of the guide bushing 110 may be configured as a slope inclined at a certain angle to be parallel to the upper surface of the guide bushing 110.

If the upper surface of the guide bushing 110 and the lower surface of the cap 120 are not configured as slopes, the guide hole will be unnecessarily placed on the head 11 due to the structure in which the head 11 is tilted at a certain angle within the guide hole 112. (112) is bound to exist as an empty gap, and as a result, there is a problem that the vertical height of the guide bushing 110 is unnecessarily increased.

In addition, since the head 11 and the cap 120 cannot be in close contact, the sealing effect of the guide hole 112 is reduced, and this causes bacteria, etc. to penetrate around the head 11, causing soft tissue damage after the procedure. It causes inflammation and further side effects that impede healing.

However, as in the present embodiment, the lower surface of the cap 120 is configured to extend not only to the guide bushing 110 but also to the head 11, thereby minimizing the space between the cap 120, the guide bushing 110, and the head 11. By doing this, not only can penetration by capillary attraction of bacteria or other body fluids be suppressed as much as possible, but also structural stability can be achieved by improving the cohesion between the two.

Next, the wedge pin 130 simultaneously penetrates the cap 120 and the head 11 facing each other up and down, and the cap 120, head 11, guide bushing 110, and plate portion 20 are supported adjacent to each other. ) It is configured to form a bonding force between the upper and lower ends, and has a conical structure so that a wedge action can be applied to at least the cap 120 and the head 11.

At this time, a wedge groove 14 is recessed in the center of the upper surface of the head 11, a wedge hole 122 communicating with the wedge groove 14 may be formed through the cap 120, and a wedge pin 130 When the wedge hole 122 and the wedge groove 14 communicate with each other, a wedge action is applied to the cap 120 and the head 11, and the cap 120 applies pressure to the plate portion 20, and the head (11) applies pressure to the adjacent guide bushing 110, thereby finally realizing strong coupling of the jig part 100 and the fixing screw 10 to the plate part 20.

In addition, the first friction protrusion 131 is formed to protrude on the outer surface of the wedge pin 130 to generate strong frictional resistance toward the cap 120 and the head 11, thereby providing the wedge pin 130 with a pull-out resistance. make it possible

In some cases, the wedge pin 130 is formed integrally with the cap 120 so that the wedge pin 130 structure can be naturally fastened to the head 11 when the cap 120 is coupled.

Meanwhile, a second friction protrusion 113 is formed protruding on the upper surface of the guide bushing 110 in the direction facing the cap 120, and a third friction protrusion is formed on the lower surface of the cap 120 in the direction facing the guide bushing 110. Protrusions 123 may be formed to protrude.

The second friction protrusion 113 and the third friction protrusion 123 may be exemplified as a group of protrusions having a fine protrusion shape without causing a large gap between the guide bushing 110 and the cap 120, There is rotational resistance between the guide bushing 110 and the cap 120 due to the second friction protrusion 113 and the third friction protrusion 123 provided between the cap 120 and the guide bushing 110 facing each other. As the pressure is applied, the relative rotation of the guide bushing 110 and the cap 120 can be suppressed, and random rotation and movement of the guide bushing 110 and the cap 120 within the fastening hole 21 can be effectively suppressed. there is.

Next, the gasket 140 is interposed between the guide bushing 110 and the cap 120 to minimize the gap between the guide bushing 110 and the cap 120 and, in particular, to shield the open upper part of the guide hole 112. It is configured to prevent penetration of saliva or bacteria into the guide hole 112 by sealing the inside.

There may be a certain level difference between the guide bushing 110 and the cap 120. In this case, the gasket 140 made of an elastic material is elastically pressed into the irregular step between the guide bushing 110 and the cap 120. By being sealed, the area between the guide bushing 110 and the cap 120 and the top of the open guide hole 112 can be strongly sealed.

The gasket 140 can be implemented by cutting a thin film of a material such as rubber, silicon, etc. into the cross-sectional shape of the fastening hole 21, and a cut line 141 is cut at a certain length in the center for the passage of the wedge pin 130. allow it to be formed.

If the cut line 141 is not provided, the wedge pin 130 will arbitrarily tear the gasket 140 when the wedge pin 130 is driven. In this case, a strong wedge action is applied to the gasket 140, causing the gasket 140 to break. ) There is a problem with the central part being torn open more than necessary.

Accordingly, excessive tearing of the gasket 140 can be prevented by forming a cut area in the gasket 140 sufficient to allow the wedge pin 130 to pass through.

The incision hole 141 may be exemplified as a cross-shaped sheath, and its shape, incision length, etc. may be modified in various ways.

Hereinafter, the surgical procedure of the osteosynthesis device according to the present invention will be described.

First, the soft tissue at the fractured area is opened to expose the bone, and the misaligned bone is properly aligned.

Next, the plate part 20 is seated at a predetermined position between the segmented bones, and the guide bushing 110 of the jig part 100 is coupled to the fastening hole 21. At this time, the guide bushing 110 may be previously coupled to the fastening hole 21 considering the installation angle of the fixing screw 10.

When combining the guide bushings 110, each first guide protrusion 111 is first aligned with each spline groove 22, and then the guide bushing 110 is introduced into the fastening hole 21. , each first guide protrusion 111 is rotated at a certain angle so that each first guide protrusion 111 is inserted and fixed into the first fixing groove 23.

Prior to this, by adjusting the coupling angle of the guide bushing 110 in the fastening hole 21, the angle of the screw axis (Ax) of the guide hole 112 can be adjusted and varied in the desired direction, and further, by following this, the fixing screw (10) ) can be adjusted, so the operator can take this into consideration when combining the guide bushings 110 so that the guide bushings 110 can be combined.

Next, the fixing screw 10 is introduced into the guide hole 112.

At this time, since the screw axis (Ax) of the guide hole 112 itself has a structure tilted at a certain angle with respect to the virtual horizontal plane, the installation angle of the fixing screw 10 can be naturally tilted to follow this, and eventually the guide hole (112) receives the head 11 by tilting it at a certain angle, so that the entire fixing screw 10, including the installation body 12 extending to the lower part of the head 11, is not installed perpendicularly to the bone but is tilted at a certain angle. Implantation is induced.

When the upper surface of the head 11 is fastened to the upper surface point of the guide bushing 110, the implant 12 is considered to be installed at an appropriate depth of the bone, and the first thread m1 of the head 11 is connected to the guide hole. As the screw engagement is completed on the third thread (m3) of (112), the fixing screw (10) itself naturally becomes equipped with pulling resistance.

At this time, the upper surfaces of the guide bushing 110 and the head 11 are exposed at the same time in the fastening hole 21.

Next, the gasket 140 is covered on the upper surface of the guide bushing 110, and the cap 120 is continuously fastened on it.

The cap 120 may be fastened in the same manner as the above-described guide bushing 110, where the slope of the upper surface of the guide bushing 110 and the slope of the lower surface of the cap 120 do not interfere with each other. The coupling direction of the cap 120 is determined so that the cap 120 can be supported by contacting the upper surface of the guide bushing 110 over a large area.

When fastening of the cap 120 is completed, the wedge pin 130 is driven toward the wedge hole 122 opened in the center of the cap 120. At this time, the wedge pin 130 is connected to the gasket (130) disposed at the bottom of the cap 120. Strong binding can be achieved by continuously penetrating 140) and the head 11.

The embodiments of the present invention described above are merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible. Therefore, it will be understood that the present invention is not limited to the forms mentioned in the detailed description above. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims. In addition, the present invention should be understood to include all modifications, equivalents and substitutes within the spirit and scope of the present invention as defined by the appended claims.

10: Fixing screw
20: Plate part
100: Jig part

Claims (5)

A plate portion having a plurality of fastening holes as a plate-shaped structure supported at the fracture boundary; and
It includes a jig part that is coupled to the inside of at least one of the plurality of fastening holes and guides the fixing screw to the center, and determines the installation angle of the fixing screw,
The fixing screw is,
A head having a first thread formed on the outer peripheral surface; and
It includes an installation body extending a certain length from the head downward and having a second screw thread formed on the outer peripheral surface,
On the inner surface of each of the plurality of fastening holes, a plurality of spline grooves extending long in the vertical direction are recessed at equal intervals, and a first fixing groove and a second fixing groove are formed at an upper and lower height difference in each spline groove along the circumference. It is formed to extend a certain length along a direction,
The jig part,
It has a cylindrical structure that can be inserted into the fastening hole, and a plurality of first guide protrusions that are inserted and guided to the outside at corresponding positions of the plurality of spline grooves are formed to protrude radially, and the plurality of first guide protrusions are formed in the first fixing groove. When the height is matched, the first guide protrusion is rotated in place to be inserted into the first fixing groove, so that it is supported by being caught in the first fixing groove and fixed, and a guide hole tilted at a certain angle with respect to the virtual horizontal plane is formed in the center. A guide bushing that accommodates the head by tilting it at a certain angle and guides the implant to be installed in the bone while being tilted at a certain angle; and
It has a cylindrical structure that can be inserted into the fastening hole, and is disposed on the upper part of the guide bushing. A plurality of second guide protrusions that are inserted and guided outward into corresponding positions of the plurality of spline grooves are formed to protrude radially, and the plurality of second guide protrusions are formed to protrude radially. 2 When the guide protrusion matches the height of the second fixing groove, the second guide protrusion is rotated in place to be inserted into the second fixing groove, so that it is supported by the second fixing groove and seals and fixes the open top of the guide bushing. An osteosynthesis device capable of adjusting the installation angle of a fixing screw, comprising a cap. delete In claim 1,
The upper surface of the guide bushing is composed of a slope inclined at a certain angle so as to be parallel to the upper surface of the tilted head, and the lower surface of the cap facing the upper surface of the guide bushing is composed of a slope inclined at a certain angle so as to be parallel to the upper surface of the guide bushing. An osteosynthesis device capable of adjusting the installation angle of the fixing screw. In claim 3,
A wedge groove is formed recessed in the center of the upper surface of the head, a wedge hole communicating with the wedge groove is formed through the cap, and a wedge pin in the shape of an upper light is fastened to the wedge groove and the wedge hole communicating with each other,
A first friction protrusion is formed to protrude on the outer surface of the wedge pin, and a second friction protrusion is formed to protrude on the upper surface of the guide bushing in a direction facing the cap,
An osteosynthesis device capable of adjusting the installation angle of the fixing screw, characterized in that a third friction protrusion is formed protruding on the lower surface of the cap in the direction facing the guide bushing. In claim 4,
The jig part,
It further includes a gasket made of elastic material interposed between the guide bushing and the cap,
An osteosynthesis device capable of adjusting the installation angle of a fixing screw, characterized in that an incision line for passage of a wedge pin is formed at a certain length in the center of the gasket.

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