WO2019139265A1 - Artificial hip joint mold and artificial hip joint manufactured thereby - Google Patents

Abstract

A mold for manufacturing an artificial hip joint according to the present invention comprises a first mold part and a second mold part which are formed as a pair of mold sections corresponding to one hip joint, and in which an inner injection space portion corresponding to the shape of a hip joint is formed when the first mold part and the second mold part are joined with each other, wherein: the first mold part has a (1-1)th half-hole which allows the injection space portion to communicate with the outside, and a (2-1)th half-hole; the second mold part has a (1-2)th half-hole which allows the injection space portion to communicate with the outside, and a (2-2)th half-hole; when the first mold part and the second mold part are joined with each other, the (1-1)th half-hole and the (1-2)th half-hole are joined to form a first hole, and the (2-1)th half-hole and the (2-2)th half-hole are joined to form a second hole; the first hole and the second hole are provided at both ends in the lengthwise direction of the injection space portion, respectively; and the mold further comprises a wire-shaped skeleton part extending from the first hole to the second hole via the central portion of the injection space portion.

Description

Artificial hip joint mold and artificial hip joint

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a artificial hip joint and a manufactured artificial hip joint, and more particularly, to a artificial hip joint and a mold for manufacturing the same.

Infection after artificial arthroplasty is one of the most serious complications in the orthopedic field and is a disease requiring long - term treatment such as conservative and surgical care.

In the hip joint, the prevalence of infection after total arthroplasty is reported to be 1-2%. Because of the nature of the artificial joint, intensive treatment is needed more than other site infection. Therefore, diversification of infectious strains, increase of antibiotic resistant bacteria, There are many factors to be considered in surgical treatment, such as the state and the fixation force of the insertion.

In the treatment of infection after total hip arthroplasty, antibiotics, articulation, and amputation are performed with past antibiotic monotherapy, marginal resection, and lavage.

A successful cure rate of 85-95% has been reported with cemented antibiotic-assisted cementation, and with the introduction of a cement-coated implant (PROSTALAC) with excellent antibiotic- Because of the great advantage of the hip, it is currently being used as a universal surgical technique for the treatment of infected Hip.

The present invention provides an artificial hip joint capable of improving structural stability in response to a transverse shearing force by reinforcing a tensile strength, and a mold for manufacturing the same.

The present invention also provides an artificial hip joint in which sufficient deformation performance and strength are secured even when cracks occur in bone cement, and a mold for manufacturing the same.

The present invention also provides a prosthetic hip joint having a more uniform quality by allowing bone cement to be implanted in a state in which the skeleton part is fixed at an accurate position, and a mold for manufacturing the same.

A mold for manufacturing a hip joint according to the present invention comprises a first mold part and a second mold part which are formed as a pair corresponding to one hip joint and in which an injection space part corresponding to the shape of the hip joint is formed in a mutually coupled state; Wherein the first mold part is formed with a 1-1 half-hole for communicating the injection space part with the outside and a 2-1 half-hole, and the second mold part is provided with a first- 2 half-holes and a 2-2 half-hole are formed, and when the first mold part and the second mold part are mutually coupled, the 1-1 half-hole and the 1-2 half-hole are combined to form one first hole , The second-1 half-hole and the second-2 half-hole are combined to form one second hole, and the first and second holes are provided on both end sides with respect to the longitudinal direction of the injection space part Through the central portion of the injection space portion from the first hole, And further comprising an armature of wire shape extends.

In addition, in the half-holes of the first and second mold halves of the first and second mold halves and the half-holes of the first and second mold halves, The holder may be formed to partially open the first hole and the second hole formed when the first and second mold parts are coupled to each other for the injection of bone cement.

And wherein a protruding guide post is formed on one of the engaging surfaces of the first mold portion and the second mold portion, and the engaging surface of the other of the first mold portion and the second mold portion, And a guide hole into which the guide post is inserted when the mold part and the second mold part are coupled.

The first half-hole and the second half-hole of the first mold portion and the one-half-hole of the first half-hole and the second-half-half- And may be formed to have a diameter and a shape corresponding to the diameter and peripheral contour of the skeleton portion.

In addition, the remaining half-holes corresponding to [1-1 first half-hole / 2nd-2nd half-hole] or [first 1-2 half-hole / second -2 half- hole] formed corresponding to the diameter and circumference of the above- And may be formed in a size as small as possible.

At least one insertion hole is formed in the bottom surface of the injection space part of the first mold part and the second mold part along the light oil path of the skeleton part. The insertion hole is inserted into the insertion hole, and the Y- The second holder may be further provided.

The second holder may be made of bone cement and may be integrally formed with the injected bone cement after the bone cement is injected and cured in the injection space.

On the other hand, the artificial hip joint according to the present invention is manufactured by injecting bone cement into the above-described mold and then hardening, and has a bone part formed along the central part in the longitudinal direction, a hardened bone cement surrounding the bone part, Respectively.

Also, the injected bone cement may contain an antibiotic component.

According to the present invention, by reinforcing the tensile strength of the artificial hip joint for the treatment of infectious diseases, which is temporarily used for the treatment of infection after the THA, the structural stability can be improved corresponding to the lateral shear force, Sufficient deformation performance and proof strength can be ensured even when cracks occur.

In addition, according to the present invention, the bone cement is injected in a state where the skeleton part is fixed at the correct position, so that the artificial hip joint having a more uniform quality can be manufactured.

1 is a schematic perspective view illustrating a metal mold for manufacturing a hip joint according to an embodiment of the present invention.

2 is a schematic perspective view illustrating a skeleton according to one embodiment.

Fig. 3 is a schematic view showing a state in which the skeleton portion of Fig. 2 is mounted on the mold of Fig. 1. Fig.

4 is a schematic perspective view showing a mold for manufacturing a hip joint according to another embodiment.

5 is a schematic perspective view showing a mold for manufacturing a hip joint according to another embodiment.

FIG. 6 is a perspective view showing a state in which a skeleton part is mounted on a mold according to the embodiment of FIG. 5;

7 is a schematic view showing a state of the artificial hip joint manufactured by a metal mold according to an embodiment.

8 is a schematic photograph for explaining the femoral foreground angle.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the absence of special definitions or references, the terms used in this description are based on the conditions indicated in the drawings. The same reference numerals denote the same members throughout the embodiments. For the sake of convenience, the thicknesses and dimensions of the structures shown in the drawings may be exaggerated, and they do not mean that the dimensions and the proportions of the structures should be actually set.

A mold according to an embodiment will be described with reference to Figs. 1 to 3. Fig. FIG. 1 is a schematic perspective view showing a mold for manufacturing a hip joint according to an embodiment of the present invention, FIG. 2 is a schematic perspective view showing a bone part according to an embodiment, FIG. 3 is a cross- And Fig.

The mold 10 according to the present embodiment includes a first mold part 100L1 and a second mold part 100L2. Since the hip joint is formed symmetrically with respect to the hip, the mold 10 is constituted of four parts in total, each pair of the left and right. Hereinafter, for convenience of explanation, a mold for forming one of the hip joints will be described as an example.

The first mold part 100L1 and the second mold part 100L2 are formed as a pair corresponding to one hip joint. The first mold portion 100L1 and the second mold portion 100L2 are formed with an injection space portion corresponding to the shape of the hip joint on the inner side in a state where they are mutually coupled.

The first mold part 100L1 is formed with a 1-1 second half-hole 115L1 and a 2nd-1 half-hole 116L1 which communicate with the outside space of the injection space part 110, and the second mold part 100L2 is formed by injection A first-second half-hole 115L2 and a second-2 half-hole 116L2 that communicate with the space portion 110 and the outside are formed. When the first mold part 100L1 and the second mold part 100L2 are coupled to each other, the first 1-1 half-hole 115L1 and the second -1-1 half-hole 116L1 are combined to form one hole And a first hole (hereinafter referred to as a second hole) is formed by combining the first and second half-halves 115L2 and 116L2.

The first hole and the second hole enable the injection of the bone cement at the same time that the skeletal part to be described later is mounted and serve as a passageway through which the air inside can be drained to the outside when the bone cement is injected. The first hole and the second hole are provided on both end sides with respect to the longitudinal direction of the injection space part 110, respectively.

Any one of the first mold part 100L1 and the second mold part 100L2 may include structures for mounting the skeleton part 200 to be described later. For example, in the case where the first mold part 100L1 is provided with such a structure, the holder 1-1 may be provided in the 1-1-th half-hole 115L1 and the 2-1-th half-hole 116L1.

The skeleton part 200 is formed in a wire shape as shown in FIG. 2. The skeleton part 200 is connected to the central part of the injection space part 110 from the first hole (the 1-1 half-hole 115L1) And extends to the second hole (second-1 half-hole 116L1).

Meanwhile, as shown in FIG. 3, the holder 120 is formed with a groove to allow the skeleton part 200 to be mounted thereon. The holder 120 functions to fix the skeleton 200 in a correct position when the bone cement is injected by mounting the skeleton 200.

As described above, when the first mold part 100L1 and the second mold part 100L2 are coupled, the holder 120 should be opened to a certain extent without closing both the first hole and the second hole. The bone cement is injected through the open area or the air can be drained to the outside when the bone cement is injected.

A guide post 111 having a protruding shape is formed on one of the engaging surfaces of the first mold part 100L1 and the second mold part L2 and a guide post 111 is inserted into the other engaging surface A guide hole 112 is formed.

4 to 6, a mold for manufacturing a hip joint according to another embodiment will be described. 5 is a schematic perspective view illustrating a mold for manufacturing a hip joint according to still another embodiment of the present invention. FIG. 6 is a perspective view of a mold for manufacturing a hip joint according to another embodiment of the present invention. Is a perspective view showing a state in which a skeleton portion is mounted.

The metal mold 10 according to the present embodiment is configured so that one end of the skeleton portion can be mounted by replacing the function of the holder by the [1-1-th half-hole 115L1 'and the 2-1-1th half-hole 116L1' And is formed in a diameter and a shape corresponding to the diameter and the peripheral contour of the skeleton part 200.

In other respects, in the case of this embodiment, it is also possible that the holder is integrally formed with the anti-hole.

When the half-holes of the first mold part are formed as described above, it is preferable that the half-holes of the second mold part, which is the remaining mold part, are formed with a size capable of injecting bone cement. That is, in this case, the half-holes which are mutually coupled to form one hole may be formed in an asymmetrical size and shape, respectively.

Meanwhile, the second holder 130 may be further provided to fix the skeleton part 200 accurately. At least one insertion hole 113 may be formed in the bottom surface of the injection space of the first mold part 100L1 and the second mold part 100L2 along the path of the oil path of the skeleton part. The second holder 130 is formed in a Y-shape so that the lower end thereof is inserted into the insertion hole 113, and the above-described skeleton part 200 is mountable on the upper part thereof.

The lower end of the second holder 130 is protruded outward after the artificial hip joint is formed. The lower end of the second holder 130 protruding outward can be removed after the bone cement is cured. Meanwhile, the second holder 130 is made of bone cement, and is preferably formed integrally with the injected bone cement after the bone cement is injected and cured in the injection space.

7 and 8, a method for manufacturing the artificial hip joint according to one embodiment and the artificial hip joint according to various sizes and shapes will be described. FIG. 7 is a schematic view showing a state of the artificial hip joint manufactured by a mold according to an embodiment, and FIG. 8 is a schematic photograph for explaining a fore and aft angle of a femur.

The artificial hip joint 300 according to the present embodiment is manufactured by injecting bone cement into the above-described mold and then hardening the bone joint part 200. The bone joint part 200 is provided along the center part in the longitudinal direction. And cured bone cement 310 forming an external shape. At this time, the bone cement injected into the mold preferably contains an antibiotic component.

In the meantime, as shown in FIG. 8, the neck shaft angle is drawn in the middle so that the femur neck and the femur shaft are divided in half, and the angle at which the two lines intersect is Measurement can be performed.

The normal range of the femur inclination angle may be 120 to 130 degrees. If the angle is less than 120 degrees, it is the coxa vara. If the angle is greater than 130 degrees, it is called the coxa valga. In addition, the femur inclination angle varies with age. At birth, the oblique angle is 140 to 150 degrees, but the load is applied to the femur while walking, and the angle gradually decreases to 120 to 130 degrees when grown. In addition, the anteversion angle of the femur is 10 to 30 degrees normal.

In this way, the hip joints are formed in various sizes and angles according to age, height, and normal state. Therefore, inner sockets having various sizes and shapes can be formed to quickly produce the artificial hip joint corresponding to the size and shape. These inner sockets can be inserted into the above-described infusion space and then injected with bone cement to form an artificial hip joint corresponding to various sizes and shapes.

For example, when the thickness of the base metal mold on the femoral portion is 13 mm, the thickness of the femoral portion of the injection space can be adjusted to 9, 10, 11, or 12 mm by inserting the inner socket.

Also, when the diameter of the head of the basic mold is 56 mm, it is possible to insert a separate inner socket to adjust the head diameter of the injection space to 54 mm or 50 mm.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. have.

<Explanation of Symbols>

100L1 and L2:

120: Holder

200: skeleton part

Claims (9)

And a first mold part and a second mold part which are formed as a pair in correspondence with one hip joint and in which an injection space corresponding to the shape of the hip joint is formed on the inner side in a state where they are mutually combined, The first mold section has a 1-1 semi-hole for communicating the injection space with the outside, a 2-1 half- The second mold portion has a first-half half-hole for communicating the injection space portion and the outside, and a second-half-half- The first 1-1 half-hole and the 1-2 half-hole are combined to form a first hole when the first mold part and the second mold part are coupled to each other, and the second -1 half- The half-holes are combined to form one second hole, Wherein the first hole and the second hole are provided on both end sides with respect to the longitudinal direction of the injection space part, And a wire-shaped skeleton portion extending from the first hole to the second hole via a central portion of the injection space portion. The method according to claim 1, The half-holes of the first and second mold halves and the half-holes of the first and second mold halves of the first and second mold halves are provided with a holder Respectively, Wherein the holder is formed to partially open the first hole and the second hole formed when the first and second mold parts are coupled to each other for injection of bone cement. The method according to claim 1, Wherein a protruding guide post is formed on one of the engaging surfaces of the first mold portion and the second mold portion, And a guide hole into which the guide post is inserted when the first mold part and the second mold part are coupled, is formed on a mating surface of the other one of the first mold part and the second mold part. The method according to claim 1, One of the half-holes of the [first 1-1 half-hole and the 2-1 half-hole] of the first mold part and the [first 1-2 half-hole and the 2-2 half- And a diameter and a shape corresponding to the diameter and peripheral contour of the skeleton portion. 5. The method of claim 4, The remaining half-holes corresponding to [1-1 half-hole / 2-1 half-hole] or [1-2 half-hole / 2-2 half-hole] formed corresponding to the diameter and circumference of the above- Sized dental prosthesis. The method according to claim 1, At least one insertion hole is formed in the bottom surface of the injection space portion of the first mold portion and the second mold portion along the light oil passage of the skeleton portion, And a second holder inserted in the insertion hole and formed in a Y shape so that the skeleton part can be mounted on the upper part. The method according to claim 1, Wherein the second holder is made of bone cement and is formed integrally with the injected bone cement after the bone cement is injected and cured in the injection space. A bone cement according to any one of claims 1 to 7, which is manufactured by injecting bone cement and then hardening the bone part, the bone part being provided along the central part in the longitudinal direction, and a hardened bone surrounding the bone part to form the outer shape of the hip joint Artificial hip joint with cement. 9. The method of claim 8, Wherein the injected bone cement comprises an antibiotic component.

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