KR102072722B1 - Fixing device for treating femur fracture - Google Patents

Abstract

A fixation device for treating a femoral fracture is provided. Fixing apparatus for treating femoral fractures according to an embodiment of the present invention, the front end portion is formed with a screw thread press-fit fixed to the fracture fragment of the femur, the rear end portion having a thicker cross-sectional diameter than the front end portion, the front end portion and A fixed screw comprising an inclined portion connecting the rear end portion inclinedly; And an anchor comprising a body and a plurality of extension protrusions connected to the body and extending to one side of the body, wherein the fixing screw has a hollow formed therein, and a plurality of anchors in the vicinity of a boundary between the front end portion and the inclined portion. Passing holes are formed, and the anchor is inserted into the hollow of the rear end so that the plurality of extension protrusions protrude through the plurality of passing holes, respectively.

Description

Fixing device for treating femur fractures {FIXING DEVICE FOR TREATING FEMUR FRACTURE}

The present invention relates to a fixing device for treating a femur fracture.

The femur is the largest, longest, and hardest bone in the human body, forming the thigh of the leg. The femur is also called the thigh bone and includes an elongated femur shaft that extends from the pelvis to the knee. The proximal end of this femoral trunk includes the head, neck, greater trochanter and lesser trochanter. The head of the femur is mutually coupled in the form of a ball and socket to an acetabular present in the pelvis with cartilage interposed therebetween. The distal end of the femur includes a medial condyle and an lateral widow. These widows mesh with the top of the tibia to form the knee joint.

The femur is the longest and strongest bone in the body, but the femur is very vulnerable to fracture. Internal fixation of the femur fracture is one of the most common orthopedic procedures. Fractures of the femur occur in both the proximal and distal portions. Proximal fractures of the femur (pelvic fractures) are generally classified into femurneck fractures, intertrochanteric fractures, and subtrochanteric fractures. Fractures of the distal femur (knee fractures) are classified as supracondylar fractures. In particular, fractures of the neck that extend to the neck are generally more difficult to treat than fractures confined to the trunk of the femur.

When femur neck fracture occurs frequently in elderly people with osteoporosis, the conventional fixation method is to fix the fracture part by using a fixation screw along with a bone marrow rod inserted into the bone marrow, or to fix several fixation screws. And fixing method are widely used.

However, when using a fixation screw with a bone marrow rod, it is difficult to easily inject bone cement into the empty space between the bone and the implant, and when fixing only with the fixation screw, the screw tip protrudes from the femur and causes pain to the patient. May cause.

Accordingly, there is a need for a useful fixing screw capable of preventing the rotation of the head without using a bone marrow rod, and the like, and additionally, a fixing screw capable of easily providing a bone cement in order to maximize the union of the fracture site is required.

Republic of Korea Patent Publication No. 2011-0055207 (published May 25, 2011) Republic of Korea Patent 1767210 (2017.08.04. Registration)

The present invention is to solve the above problems, it is inserted in the fracture of the femur combined to provide a fracture treatment, and provides a fixing device for treating femoral fractures that can mechanically prevent rotation.

In addition, the present invention provides a fixing device for treating femoral fractures that can smoothly inject bone cement during fracture of the femur.

Problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

Fixing device for femoral fracture treatment according to an embodiment of the present invention for achieving the above object, the front end portion is formed with a screw thread press-fit fixed to the fracture fragments of the femur, and the rear end portion having a thicker cross-sectional diameter than the front end portion And a fixing screw comprising an inclined portion connecting the front end portion and the rear end portion inclinedly. And an anchor comprising a body and a plurality of extension protrusions connected to the body and extending to one side of the body, wherein the fixing screw has a hollow formed therein, and a plurality of anchors in the vicinity of a boundary between the front end portion and the inclined portion. Passing holes are formed, and the anchor is inserted into the hollow of the rear end so that the plurality of extension protrusions protrude through the plurality of passing holes, respectively.

The fixing screw may include a first shear injection hole and a second shear injection hole through which bone cement injected through the hollow is injected into the front end portion, and the first shear injection hole may be formed in the screw line. have.

In addition, the fixing screw, the diameter of the second shear injection hole may be larger than the diameter of the first shear injection hole.

In addition, the fixing screw, the bone cement injected through the hollow may be injected through the through hole.

The fixing screw may include an inclined spray hole for injecting bone cement injected through the hollow into the inclined portion.

In addition, the fixing screw, a rectangular spiral wrinkles may be formed in a portion of the outer side of the rear end portion perpendicular to the longitudinal direction of the rear end portion.

In addition, the anchor, irregularities may be formed on each outer side of the plurality of extension protrusions.

The anchor may further include a connection member connecting the body and the plurality of extension protrusions.

Other specific details of the invention are included in the detailed description and drawings.

According to the invention, the insertion of the fracture of the femur can be combined to prevent fractures to prevent rotation to maximize the therapeutic effect.

In addition, the bone cement can be smoothly injected to easily fill the empty space between the fixing screw and the femur, and the fixing screw can be properly fixed and supported through the bone cement.

And it can be easily removed after completion of the fracture treatment.

1 is a view showing a state before coupling of the fixing device for treating femur fractures according to an embodiment of the present invention.
Figure 2 is a view showing a state of coupling of the fixing device for treating femur fractures according to an embodiment of the present invention.
Figure 3 is a view showing a state after coupling of the fixing device for treating a femur fracture in accordance with an embodiment of the present invention.
Figure 4 is a view showing another embodiment of the anchor of the fixing device for treating femur fractures according to an embodiment of the present invention.
5 is a view showing another embodiment of the anchor of the fixing device for treating a femur fracture according to an embodiment of the present invention.
Figure 6 is a view showing a state in which the fixing device for treating femur fractures according to an embodiment of the present invention applied to the femur fracture.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and only the present embodiments make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention belongs. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Although the first, second, etc. are used to describe various elements, components and / or sections, these elements, components and / or sections are of course not limited by these terms. These terms are only used to distinguish one element, component or section from another element, component or section. Therefore, the first device, the first component or the first section mentioned below may be a second device, a second component or a second section within the technical spirit of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and / or “made of” refers to a component, step, operation, and / or element that includes one or more other components, steps, operations, and / or elements. It does not exclude existence or addition.

Unless otherwise defined, all terms used in the present specification (including technical and scientific terms) may be used in a sense that can be commonly understood by those skilled in the art. In addition, terms that are defined in a commonly used dictionary are not ideally or excessively interpreted unless they are specifically defined clearly.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view showing a state before coupling of the fixing device for treating femur fractures according to an embodiment of the present invention. In addition, Figure 2 is a view showing a state of coupling of the fixing device for treating femur fractures according to an embodiment of the present invention. And, Figure 3 is a view showing a state after the coupling of the fixing device for treating femur fractures according to an embodiment of the present invention.

1 to 3, the fixing device for treating a femur fracture (100, hereinafter referred to as “fixing device”) according to an embodiment of the present invention includes a fixing screw 110 and an anchor 120.

Specifically, the fixing device 100 is a front end portion 112 is formed with a screw thread 1121 press-fit fixed to the fracture pieces of the femur, a rear end portion 114 having a thicker cross-sectional diameter than the front end portion, and the front end Fixing screw 110 and the body 122 consisting of an inclined portion 116 for obliquely connecting the portion 112 and the rear end 114, and connected to the body 122 and extends to one side of the body 122 It includes an anchor 120 consisting of a plurality of extension protrusions 124 to be. In this case, the fixing screw 110 has a hollow 105 formed therein, and a plurality of passage holes 1162 may be formed in the vicinity of the boundary between the front end portion 112 and the inclined portion 116. In addition, the anchor 120 may be inserted into the hollow 105 of the rear end 114 so that the plurality of extension protrusions 124 may protrude through the plurality of passage holes 1162.

That is, the fixing device 100 is composed of two parts of the fixing screw 110 and the anchor 120, and after the fixing screw 110 is inserted into the fracture of the femur, the anchor 120 of the fixing screw 110 It serves as a support to prevent rotation. The plurality of extension protrusions 124 of the anchor 120 protrude through the plurality of passage holes 1162 of the fixing screw 110, respectively. 3, the end portions of the extension protrusions 124 protruding from the plurality of passage holes 1162 are bent by the femur. To this end, the extension protrusion 124 may be arc-shaped cross-sectional diameter in the longitudinal direction.

Hereinafter, look at the specific configuration of the fixing screw 110 and the anchor 120.

The fixing screw 110 has a thread 1121 to be press-fitted to the fracture fragment of the femur is formed on the outside, the first shear injection hole 1122 to which the bone cement injected through the hollow 105 to the front end portion 112 is injected ) And a second shear injection hole 1123. Here, the first shear injection hole 1122 may be formed in the screw line 1121.

A screw thread 1121 is formed at the front end portion 112 and is pressed into and fixed to the fracture portion of the femur. The front end 112 may be press-fitted and fixed to the head of the femur during the treatment of the femoral neck fracture. Specifically, the fixing screw 110 is smoothly inserted or removed by rotating the screw 1121, and the screw 1121 is fixed to the head of the femur head when the fixing screw 110 is fastened to the head. Do not let go. Thereafter, the anchor 120 is inserted to prevent rotation.

The first shear injection hole 1122 and the second shear injection hole 1123 are holes in which bone cement injected through the hollow 105 is discharged to the outside. The first shear injection hole 1122 and the second shear injection hole 1123 communicate with the hollow 105 therein to allow the bone cement to thigh bone cement through the first shear injection hole 1122 and the second shear injection hole 1123. Can be provided to As the bone cement is discharged to the femur side through the first shear injection hole 1122 and the second shear injection hole 1123, the bone cement is evenly distributed, thereby making it possible to firmly fix the fixing screw 110.

The first shear injection hole 1122 and the second shear injection hole 1123 may be formed in plural, and may be symmetrically spaced apart from the front end portion 112 at equal intervals so as to evenly spray bone cement. In addition, the diameter of the second shear injection hole 1123 may be greater than that of the first shear injection hole 1122.

The fixing screw 110 has an anchor 120, a rear end portion 114 having a larger cross-sectional diameter than the front end portion 112 is formed on the side where the bone cement is inserted. The front end 112 and the rear end 114 are preferably cylindrical in shape. The hollow 105 is communicated from the rear end 114 to the front end 112, but the hollow of the rear end 114 is larger in size than the front end 112 so that the anchor 120 can be inserted. desirable.

In particular, the rear end portion 114 of the fixing screw 110 may be formed in a rectangular spiral wrinkles 1142 in the vertical portion of the rear end portion 114 in the vertical direction of the longitudinal direction. The spiral wrinkles 1142 prevent the fixing screw 110 from being separated from the head after the fixing screw 110 is press-fitted to the head.

The fixing screw 110 is formed with an inclined portion 116 for obliquely connecting the front end 112 and the rear end 114. A plurality of through holes 1162 are formed in a portion of the inclined portion 116. The plurality of through holes 1162 may be formed in accordance with the number of extension protrusions 124 of the anchor 120, but may be formed at a predetermined interval more than the extension protrusions 124. For example, the plurality of passage holes 1162 may be formed in two, three, four, six, eight, respectively, in consideration of the size of the fixing screw 110, the fracture situation.

The plurality of passage holes 1162 may be formed only in the inclined portion 116 or may be formed over the inclined portion 116 and the front end portion 112. The cross-sectional size of the anchor 120 is designed to fit the size of the hollow of the rear end 114 so that the anchor 120 is inserted through the rear end 114 and the extension protrusion 124 of the anchor 120 passes through the through hole 1162. Protrudes through). In this case, after the extension protrusion 124 protrudes through the through hole 1162, the bone cement injected through the empty space of the through hole 1162 may be injected. The plurality of passing holes 1162 are spaced apart at equal intervals.

In addition, the inclined portion 116 of the fixing screw 110 may include an inclined injection hole 1164. The bone cement injected through the hollow may be injected through the inclined spray hole 1164, and thus, the bone cement may be more abundantly filled. A plurality of such inclined injection holes 1164 may be formed between the passage holes 1162. Since the bone cement may be injected through the inclined injection hole 1164 and the passage hole 1162, the bone cement may be evenly injected to evenly fill the empty space of the femur and the fixing screw 110.

Figure 4 is a view showing another embodiment of the anchor of the fixing device for treating femur fractures according to an embodiment of the present invention.

The anchor 120 is inserted into the hollow of the rear end 114 and the end of the extension protrusion 124 protrudes through the through hole 1162. When the through hole 1162 is formed in the inclined portion 116, the through hole 1162 has an inclined elliptical shape, the extension protrusion 124 is forced in one direction inclined by the inclined portion of the inclined portion 116 Will receive. Thus, the extension protrusion 124 is forced out of the passage hole 1162 by the force in one direction by the passage hole 1162, and the end of the extension protrusion 124 is resisted by the femur so that the extension protrusion 124 ) Bends away from each other. In addition, when the passage hole 1162 is formed over the inclined portion 116 and the front end portion 112, the extension protrusion 124 receives a force at the boundary portion where the inclined portion 116 and the front end portion 112 meet. The extension protrusion 124 exits the passage hole 1162 while receiving the force in one direction by the passage hole 1162, and the end portion of the extension protrusion 124 is subjected to resistance by the femur. 124 is bent in a direction away from each other. Therefore, the fixing screw 110 is supported by the anchor 120, to prevent rotation.

Referring to FIG. 4, the anchor 120 may have irregularities 122 formed on each outer side of the plurality of extension protrusions 124. Unevenness 122 can prevent the fixing screw 110 from rotating in the head more strongly.

5 is a view showing another embodiment of the anchor of the fixing device for treating a femur fracture according to an embodiment of the present invention.

Referring to FIG. 5, the anchor 120 may further include a connection member 126 connecting the body 122 and the plurality of extension protrusions 124. The number of extension protrusions 124 may be varied using the connection member 126. For example, the plurality of passage holes 1162 may be formed in two, three, four, six, eight, respectively, in consideration of the size of the fixing screw 110, the fracture situation, and the connection member ( By allowing each extension protrusion 124 to be inserted into 126, the number of extension protrusions 124 may be appropriately reduced or increased. In addition, the number of extension protrusions 124 may be smaller than that of the through holes 1162, so that the amount of bone cement injected through the through holes 1162 may be appropriately increased.

Figure 6 is a view showing a state in which the fixing device for treating femur fractures according to an embodiment of the present invention applied to the femur fracture.

Referring to FIG. 6, the fixing device 100 is fixed to the head 12 of the femur 10 for the treatment of a fracture in which a fracture occurs in the femur 10. An extension protrusion 124 of the anchor 120 is fixed near the electron 14 of the femur 10, which is an area between the body 16 and the head 12.

As shown in FIG. 6, when the fixing device 100 is installed, the fixing screw 110 of the fixing device 100 may be prevented from rotating through the anchor 120. That is, the extension protrusion 124 of the anchor 120 is to prevent the rotation.

In addition, bone cement injected through the hollow of the fixing screw 110 is injected through the various holes 1122, 1123, 1162, and 1164. In particular, the second shear injection hole 1123 is positioned near the electrons 14 of the femur 10. In addition, the first front end injection hole 1122 is located on the head 12 side, and the through hole 1162 and the inclined injection hole 1164 are located on the body 16 side. Therefore, by increasing the hole diameter of the second shear injection hole 1123 than the first shear injection hole 1122 and / or the inclined injection hole 1164, more bone cement can be injected. Through this, more bone cement may be filled in the vicinity of the electrons 14 of the femur 10, which is relatively large between the fixing screw 110 and the femur 10. Therefore, the fixing force of the fixing screw 110 and the electron 14 portion of the breakable femur 10 can be further strengthened so that the fixing screw 110 can be firmly fixed to the region of the electron 14 of the femur 10. It becomes possible.

According to the various embodiments described above, by fixing the fracture of the femur and preventing mechanical rotation, it is possible to restore the fracture faster. In addition, the bone cement can be evenly filled in the empty space with the femur together with the smooth injection of the bone cement, thereby enabling a firm fixation. Through this, effective treatment of femoral fracture patients is possible, and it is possible to quickly restore the function of the femur.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

100: Fixation device for treating a femur fracture
110: fixing screw 120: anchor

Claims (8)

A fixed screw including a front end portion having a screw line press-fitted to a fracture fragment of the femur, a rear end portion having a larger cross-sectional diameter than the front end portion, and an inclined portion inclinedly connecting the front end portion and the rear end portion; And
It includes a body and an anchor made of a plurality of extension protrusions connected to the body and extending to one side of the body,
The fixing screw has a hollow formed therein, a plurality of through holes are formed in the vicinity of the boundary of the front end portion and the inclined portion,
The anchor is inserted into the hollow of the rear end and the plurality of extension protrusions respectively protrude through the plurality of passage holes, further comprising a connecting member connecting the body and the plurality of extension protrusions, for treating femur fractures Fixing device. The method of claim 1,
The fixing screw,
And a first shear injection hole and a second shear injection hole through which bone cement injected through the hollow is injected into the front end portion.
Fixing device for treating femur fractures, wherein the first shear injection hole is formed in the thread. The method of claim 2,
The fixing screw,
Fixing device for treating femur fractures, wherein the diameter of the second shear injection hole is larger than the diameter of the first shear injection hole. The method of claim 1,
The fixing screw,
Fixing device for treating femoral fractures, the bone cement injected through the hollow is injected through the passage hole. The method of claim 1,
The fixing screw,
Fixing device for treating femoral fractures having an inclined injection hole is injected into the inclined portion cement bone injected through the hollow. The method of claim 1,
The fixing screw,
Fixing device for treating femoral fractures in which a rectangular spiral wrinkle is formed in a portion of the outer side of the rear end perpendicular to the longitudinal direction of the rear end. The method of claim 1,
The anchor,
Fixing device for treating femur fractures in which irregularities are formed on each outside of the plurality of extension protrusions. delete

Images