KR102015560B1 - A artificial high joint mold and the artificial high joint thereby - Google Patents

Abstract

The artificial hip joint manufacturing mold according to the present invention includes: a first mold part and a second mold part which are formed in pairs corresponding to one hip joint, and an injection space part corresponding to the shape of the hip joint is formed in the mutually coupled state; The first mold part includes a first-first half hole for communicating the injection space with the outside, and a second first half hole, and the second mold part includes a first-first communication with the outside of the injection space. 2 half holes and 2-2 half holes are formed, and when the first mold part and the second mold part are coupled to each other, the 1-1 half hole and the 1-2 half hole are combined to form a first hole. And the 2-1 half hole and the 2-2 half hole are combined to form a second hole, and the first hole and the second hole are provided at both end sides based on the length direction of the injection space, respectively. And from the first hole to the second hole via a central portion of the injection space part. And further comprising an armature of wire shape extends.

Description

A artificial high joint mold and the artificial high joint thereby

The present invention relates to an artificial hip and an artificial hip manufactured thereby, and more particularly, to an artificial hip that can be used for the treatment of an infection after an artificial hip replacement and a mold for manufacturing the same.

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

In the hip, the prevalence of infection after total replacement is reported to be 1-2%, and due to the nature of artificial joints, more intensive treatment is required than other sites. There are many factors to consider in surgical treatment such as condition, fixation force of implant.

The treatment of infection after total hip arthroplasty includes antibiotic therapy, joint fusion, and amputation with antibiotics alone or with implants after debridement and lavage.

A successful treatment rate of 85-95% has been reported as a result of an attempt to replace antibiotics with cement mixed with antibiotics, and the use of antibiotic-treated cement-coated implants (PROSTALAC) has resulted in a variety of surgeries that affect excellent infection control and final replacement. Due to its advantages, it is currently used as a universal surgical technique for treating infected hip joints.
(Patent Document 1) JP2007-190059 A1 (Published Date: 2007.08.02)

The present invention provides an artificial hip joint and a mold for manufacturing the same that can improve structural stability in response to the shear force in the transverse direction by reinforcing tensile strength.

In another aspect, the present invention provides an artificial hip joint and a mold for manufacturing the same that ensures sufficient deformation performance and strength even when a crack occurs in the bone cement.

In another aspect, the present invention provides the artificial hip joint and the mold for manufacturing the same having a more uniform quality by allowing the bone cement to be injected in a fixed state at the correct position.

The artificial hip joint manufacturing mold according to the present invention includes: a first mold part and a second mold part which are formed in pairs corresponding to one hip joint and in which an injection space part corresponding to the shape of the hip joint is formed inside the joint; The first mold part includes a first-first half hole for communicating the injection space with the outside, and a second first half hole, and the second mold part includes a first-first communication with the outside of the injection space. 2 half holes and 2-2 half holes are formed, and when the first mold part and the second mold part are coupled to each other, the 1-1 half hole and the 1-2 half hole are combined to form a first hole. And the 2-1 half hole and the 2-2 half hole are combined to form a second hole, and the first hole and the second hole are provided at both end sides based on the length direction of the injection space, respectively. And from the first hole to the second hole via the center portion of the injection space portion. And further comprising an armature of wire shape extends.

In addition, the armature portion is mounted to any of the half holes of the [1-1 half hole and the 2-1 half hole] and the [1-2 half hole and the 2-2 half hole] of the first mold part. The holder may be provided, and the holder may be formed to partially open the first hole and the second hole formed when the first mold part and the second mold part are combined to inject bone cement.

In addition, a guide post having a protruding shape is formed on one of the coupling surfaces of the first mold part and the second mold part, and the first mold part and the second mold part are coupled to the other one of the first mold part and the second mold part. When the mold part and the second mold part are combined, a guide hole into which the guide post is inserted may be formed.

In addition, one of the half holes of the [1-1 half hole and the 2-1 half hole] of the first mold part and [1-2 half hole and the 2-2 half hole] of the second mold part may have one end portion of the skeleton portion. It may be formed in a diameter and shape corresponding to the diameter and the circumferential appearance of the skeleton portion so as to be mountable.

In addition, the other half holes corresponding to the [1-1-1 half hole / 2-1 half hole] or [1-2 half hole / 2-2 half hole] formed corresponding to the diameter and the circumference of the skeleton portion may be injected with bone cement. It can be formed to the size possible.

In addition, at least one insertion hole is formed in the bottom surface of the injection space portion of the first mold part and the second mold part along the transit path of the skeleton part, and is inserted into the insertion hole and formed in a Y shape so that the skeleton part can be mounted on the upper part. The second holder may be further provided.

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

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 hardened, the bone portion provided along the center portion in the longitudinal direction, and the hardened bone cement surrounding the bone portion to form the outline of the hip joint It is provided.

In addition, the injected bone cement may include an antibiotic component.

According to the present invention, by reinforcing the tensile strength of the artificial hip joint for the treatment of infections temporarily used for the treatment of infection after the replacement of hip joint through the skeleton, structural stability can be improved in response to the lateral shear force, Even in the case of a crack, sufficient deformation performance and proof strength can be ensured.

In addition, according to the present invention, the mold according to the present invention can produce artificial hip joint having a more uniform quality by allowing the bone cement to be injected in a fixed state at the correct position.

1 is a schematic perspective view showing a mold for manufacturing an artificial hip joint according to an embodiment of the present invention.
2 is a schematic perspective view showing a skeleton according to an embodiment.
Figure 3 is a schematic diagram showing a state in which the skeleton portion of Figure 2 is mounted to the mold of Figure 1;
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.
6 is a perspective view showing a state in which the skeleton portion is mounted to the mold according to the embodiment of FIG.
Figure 7 is a schematic diagram showing the appearance of the artificial hip manufactured by a mold according to an embodiment.
8 is a schematic photograph for explaining the femoral foreground angle.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Unless otherwise defined or mentioned, terms indicating directions used in the present description are based on the states shown in the drawings. In addition, the same reference numerals throughout the embodiments indicate the same member. On the other hand, each of the components shown in the drawings may be exaggerated in thickness or dimensions for the convenience of description, and does not mean that actually should be configured by the ratio between the dimensions or configurations.

A mold according to an exemplary embodiment will be described with reference to FIGS. 1 to 3. 1 is a schematic perspective view showing a mold for manufacturing an artificial hip joint according to an embodiment of the present invention, Figure 2 is a schematic perspective view showing a skeleton according to an embodiment, Figure 3 is a skeleton of Figure 2 in the mold of Figure 1 It is a schematic diagram which shows an attached state.

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, the mold 10 is composed of a total of four parts, one pair each left and right. Hereinafter, for convenience of description, a mold for forming one hip joint will be described as an example.

The first mold part 100L1 and the second mold part 100L2 are formed in pairs corresponding to one hip joint. In the state where the first mold part 100L1 and the second mold part 100L2 are coupled to each other, an injection space part corresponding to the shape of the hip joint is formed inside.

The first mold part 100L1 is formed with the first-first half hole 115L1 and the second-first half hole 116L1 communicating with the injection space 110 and the outside, and the second mold part 100L2 is injected. The 1-2 second half hole 115L2 and the second-2 half hole 116L2 communicating with the space 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-first half hole 115L1 and the first-second half hole 115L2 are coupled to each other to form one hole (hereinafter referred to as the first hole). And a hole (hereinafter referred to as a second hole) is formed by combining the second-first half hole 116L1 and the second-second half hole 116L2.

The first hole and the second hole respectively allow the bone cement to be described later, and at the same time enable the injection of bone cement, and when the bone cement is injected serves as a passage through which the air inside can flow out. The first hole and the second hole are provided at both end sides with respect to the longitudinal direction of the injection space 110, respectively.

Any one of the first mold part 100L1 and the second mold part 100L2 may include components for mounting the skeleton part 200 to be described later. For example, when the first mold part 100L1 includes these components, the holder 120 may be provided in the first-first half hole 115L1 and the second-first half hole 116L1.

Skeleton 200 is formed in a wire shape as shown in Figure 2, as shown in Figure 3 via the central portion of the injection space portion 110 from the first hole (first one-half hole (115L1)). To the second hole (the second-first half-hole 116L1).

On the other hand, as shown in Figure 3, the holder 120 is formed with a groove so that the skeleton portion 200 can be mounted. The holder 120 serves to fix the skeleton portion 200 so as to be positioned at the correct position even when the bone cement is injected by mounting the skeleton portion 200.

As described above, when the first mold part 100L1 and the second mold part 100L2 are coupled to each other, the holder 120 should be partially opened without closing both the first hole and the second hole. Inject bone cement through the open area or allow air to flow out when the bone cement is injected.

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

A mold for manufacturing an artificial hip according to another embodiment will be described with reference to FIGS. 4 to 6. 4 is a schematic perspective view showing a mold for manufacturing a hip joint according to another embodiment, FIG. 5 is a schematic perspective view showing a mold for manufacturing a hip joint according to another embodiment, and FIG. 6 is a mold according to the embodiment of FIG. It is a perspective view showing the state mounted on the skeleton.

In the mold 10 according to the present embodiment, the first mold part [first-half-half hole 115L1 'and second-half-half hole 116L1'] replaces the function of the holder so that one end of the skeleton portion can be mounted. There is a difference in that it is formed in a diameter and a shape corresponding to the diameter and circumferential appearance of the skeleton portion 200.

In other words, in the present embodiment, the holder may be formed integrally with the half holes.

When the half holes of the first mold part are formed as described above, the half holes of the second mold part, which is the remaining mold part, are preferably formed to a size capable of injecting bone cement. That is, in this case, the half holes coupled to each other to form one hole may be formed in an asymmetric size and shape, respectively.

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

After the artificial hip is formed, the lower end of the second holder 130 is protruded to the outside. The lower end of the second holder 130 protruding to the outside may be removed after the bone cement is cured. On the other hand, it is preferable that the second holder 130 is made of bone cement so that the bone cement in the injection space is integrally formed with the injected bone cement after being injected and cured.

7 and 8 illustrate a method for manufacturing an artificial hip joint manufactured by a mold according to an embodiment and an artificial hip joint according to various sizes and shapes. Figure 7 is a schematic diagram showing the appearance of the artificial hip joint manufactured by a mold according to an embodiment, Figure 8 is a schematic photo for explaining the femoral foreground angle.

Artificial hip joint 300 according to the present embodiment is manufactured by injecting bone cement into the above-described mold and then hardened, surrounding the skeleton portion 200 and the skeleton portion 200 provided along the center portion in the longitudinal direction of the hip joint It is provided with a hardened bone cement 310 to form an outer shape. At this time, the bone cement injected into the mold preferably includes an antibiotic component.

Meanwhile, the neck shaft angle of the femur is drawn in the middle to divide the femur neck and the femur shaft in half, as shown in FIG. 8, and the angle of the point where the two lines intersect. It can measure by measuring.

The normal range of the femoral inclination angle may be 120 to 130 degrees. If the angle is smaller than 120 degrees, it is called coxa vara and if the angle is larger than 130 degrees, it is called coxa valga. The femoral inclination also varies with age. At birth, the angle of inclination is 140-150 degrees, but as the load is applied to the femur while walking, the angle decreases gradually. In addition, the femur foreground angle (Anteversion) is 10 degrees to 30 degrees is a normal angle.

As such, the hip is formed in various sizes and angles depending on age, height, and normality. Therefore, an inner socket having various sizes and shapes may be formed in order to quickly manufacture an artificial hip joint corresponding to the size and shape. These inner sockets can be inserted into the above-described injection space portion and then injected with bone cement to form artificial hip joints corresponding to various sizes and shapes.

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

In addition, when the diameter of the head of the basic mold is 56mm, it is possible to adjust the head diameter of the injection space portion to 54mm or 50mm by inserting a separate inner socket.

Although the preferred embodiment of the present invention has been described above, the technical idea of the present invention is not limited to the above-described preferred embodiment, and may be variously implemented in a range without departing from the technical idea of the present invention specified in the claims. have.

100L1, L2: Mold part
120: holder
200: skeleton

Claims (9)

And a first mold part and a second mold part formed in a pair corresponding to one hip joint and having an injection space part corresponding to the shape of the hip joint in an interconnected state.
The first mold part is formed with a 1-1 half hole and a 2-1 half hole for communicating the injection space part with the outside,
The second mold part is formed with the first and second half holes and the second and second half holes communicating the injection space with the outside,
When the first mold part and the second mold part are coupled to each other, the first-first half hole and the first-second half hole are combined to form a first hole, and the second-1 half hole and the second-2 The half holes combine to form a second hole,
The first hole and the second hole are provided at both end sides with respect to the longitudinal direction of the injection space, respectively,
Further comprising a wire-shaped skeleton portion extending from the first hole to the second hole via the central portion of the injection space,
Holders in which the armature is mounted on one of the half holes of the first mold half and the second half hole and the second half hole and the second half hole of the second mold part. Is provided,
In order to inject the bone cement, the holder is formed to partially open the first hole and the second hole formed when the first mold part and the second mold part are coupled.
The holder is a mold for manufacturing an artificial hip joint having an arc-shaped groove having a center angle which is a constant acute angle from the center. delete The method of claim 1,
A guide post having a protruding shape is formed on an engagement surface of any one of the first mold part and the second mold part,
The artificial hip joint manufacturing die of which the guide hole into which the guide post is inserted is formed when the first mold part and the second mold part are coupled to the other one of the first mold part and the second mold part. The method of claim 1,
One end of the first mold portion [1-1 half hole and 2-1 half hole] and the second mold portion [1-2 half hole and 2-2 half hole] is mounted at one end of the skeleton portion. A mold for manufacturing an artificial hip joint, which is formed to have a diameter and a shape corresponding to the diameter and the circumferential appearance of the skeleton portion as possible. The method of claim 4, wherein
The other half holes corresponding to the [1-1-1 half hole and 2-1 half hole] or [1-2 half hole and 2-2 half hole] which are formed corresponding to the diameter and the circumference of the skeleton may be injected with bone cement. Mold for manufacturing artificial hip joint formed in size. The method of claim 1,
At least one insertion hole is formed in a bottom surface of the injection space of the first mold part and the second mold part along a passageway of the skeleton portion.
Is inserted into the insertion hole, the mold for manufacturing artificial hip joint further comprises a second holder formed in a Y-shape so that the skeleton portion can be mounted on the top. The method of claim 6,
The second holder is made of bone cement, the bone cement for manufacturing artificial hip joint is formed integrally with the injected bone cement after the bone cement in the injection space portion is injected and cured. The bone cement is injected into the mold according to any one of claims 1 and 3 to 7, and then hardened, and the skeleton is provided along a central portion in the longitudinal direction, and the outline of the hip joint surrounds the skeleton. Artificial hip joint having a hardened bone cement to form. The method of claim 8,
The implanted bone cement is an artificial hip joint containing an antibiotic component.

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