JP2007190059A - Bone component molding unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bone component molding unit with excellent heat resistance hardly deformed during the molding, with environmental consideration because the unit is repeatedly reusable in the sterilization with steam and the cost is low, facilitating the work to the mold release after the molding without being affected by the heat generated during the molding. <P>SOLUTION: The bone component molding unit is used in an operation for the treatment when infection is developed in a region where the artificial joint replacement operation is performed. The bone component molding unit is for molding a bone component 101 which is disposed in the region where a removed artificial joint is disposed, and in which a medicament is mixed. The bone component molding unit is made of a pair of separately disposed metal materials 13 and 14. The bone component molding unit has a molder 11 for forming the molding space 15 of the bone component 101 inside by combining the metal materials in such a way as superimposed on each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is used in an operation for treatment when an infectious disease develops at a site where artificial joint replacement is performed, and is placed at the site where the artificial joint removed from the site has been placed The present invention relates to a bone component molding unit for molding a bone component mixed with a medicine.

  Conventionally, total hip replacement (THA) has been performed on patients with symptoms that cause pain in the hip joint, such as osteoarthritis of the hip and rheumatism. In this case, although the probability of occurrence is quite low, inflammation due to infection may develop at the site where hip replacement has been performed. At that time, in order to treat the site where the infection occurred, the replaced hip prosthesis was removed, and the part where the prosthetic hip joint was removed was molded into the same shape as the prosthetic hip joint and was mixed with antibiotics Surgery is performed to reduce inflammation caused by the placement of components. The bone component placed at the site where the infection has developed will be left at that site for a predetermined period of time.

  When the above-mentioned operation is performed for treatment when an infection has occurred in a site where an artificial joint replacement operation such as a hip replacement is performed, the operator or his / her assistant must be in a clean area. The aforementioned bone component will be molded. In this case, if two-component cement mixed with antibiotics is mixed for a predetermined time and then the operator or assistant forms the bone component with a predetermined shape by molding the cement by hand, it takes time. There is a problem that a high skill is required for molding a bone component having a certain shape while extending. For this reason, a cement spacer mold made of silicon rubber is known as a molding tool for molding bone components that can be used to form bone components of a certain shape in a short time without requiring high skill. (See Non-Patent Document 1).

Product catalog "Knee & Hip-CEMENT SPACE MODS", Biomet Japan

  In the molding machine made of silicon rubber described in Non-Patent Document 1, there arises a problem caused by the fact that silicone rubber is a thermoplastic resin. First, since the cement injected into the molding machine made of silicon rubber is a mixture of two liquids and cured while generating heat, the molding machine tends to deform during molding, and the injected cement is There is a problem that it is likely to flow out from the deformed portion. In addition, as a second problem, cleaning sterilization of surgical instruments and the like performed in hospitals in recent years is often steam sterilization in consideration of environmental problems. However, when steam sterilization is performed on a silicone rubber molding machine, In some cases, the molding machine is deformed and discarded after being used once. For this reason, the cost is high, and since it is a medical device, a lot of industrial waste is generated, and it is also necessary to treat it as industrial waste. Not desirable. As a third problem, the hardness of the silicon rubber needs to be lowered in order to smoothly perform the mold release operation after the bone component is molded by the silicon rubber molding machine. When heated by the heat generated by the cement during molding, the hardness of the silicone rubber during molding may further decrease. Therefore, during molding, it becomes necessary to hold the shape of the molding machine made of silicon rubber with a human hand or jig, and smooth release after molding without being affected by the heat generated during molding. It is difficult to get to work.

  In view of the above circumstances, the present invention has good heat resistance, is less likely to be deformed during molding, can be repeatedly used even when steam sterilization is performed, is low in cost, and has excellent environmental considerations. An object of the present invention is to provide a bone component molding unit that can smoothly perform a mold release operation after molding without being affected by heat generated therein.

Means and effects for solving the problems

The bone component molding unit of the present invention is used in an operation for treatment when an infection develops in a site where artificial joint replacement has been performed, and the site where the prosthesis removed from the site has been placed It is related with the bone component shaping | molding unit which shape | molds the bone component currently arrange | positioned and the chemical | medical agent is mixed.
And this invention has the following some features in order to achieve the said objective. That is, the present invention comprises the following features alone or in appropriate combination.

  In order to achieve the above object, the first feature of the bone component molding unit according to the present invention is formed of a pair of metal materials provided separately and combined so that the pair of metal materials are overlapped. And a molding machine for forming the bone component molding space inside.

According to this configuration, a space for forming a bone component is formed inside by combining the pair of metal materials so as to overlap each other. A bone component is molded by injecting a cement mixed with a medicine into the molding space and hardening it. Since this molding machine is made of a metal material, it has good heat resistance, and the injected cement does not flow out due to deformation of the cement during molding. And, since it can be used with repeated steam sterilization without causing deformation of the molding machine by performing steam sterilization once, it is low cost and can suppress the generation of industrial waste. It is possible to exert excellent effects from the viewpoint of environmental consideration. In addition, as a metal material which comprises a shaping | molding device, stainless steel, a titanium alloy etc. can be used as a metal which can be sterilized as a medical device material, for example.
Further, since the molding machine is formed as a pair of metal materials provided separately, the mold release operation after molding can be easily performed only by separating the pair of superimposed metal materials. In addition, the problem that the shape needs to be maintained as the hardness decreases due to heating by the heat generated by the cement during molding does not occur in the first place.
Therefore, according to the configuration of the present invention, heat resistance is good, deformation during molding is less likely to occur, it can be used repeatedly even when performing steam sterilization, and it is low cost and excellent in consideration for the environment. It is possible to obtain a bone component molding unit that can smoothly perform the mold release operation after molding without being affected by the generated heat.

  The second feature of the bone component molding unit according to the present invention is that, when combined, a convex portion is formed on one overlapping surface of the pair of metal materials forming the molding space, and the pair of metal materials A concave portion corresponding to the shape of the convex portion is formed on the other overlapping surface.

  According to this configuration, the convex portion is formed on one overlapping surface of the pair of metal materials, and the concave portion corresponding to the shape of the convex portion is formed on the other overlapping surface. By fitting the recess and the recess, the overlapping surfaces of the pair of metal materials can be easily positioned at predetermined positions. In addition, since it is not necessary to provide an intricately shaped combination mechanism such as a screw or a hinge, a combination mechanism excellent in cleaning properties can be easily realized.

  A third feature of the bone component molding unit according to the present invention is a case in which one end side of the molding device in a combined state is inserted and an opening formed corresponding to the outer shape of the one end side. It is also provided.

  According to this structure, this one end side is inserted in the case which has the opening part corresponding to the external shape of the one end side of the molding machine of the combined state. Thereby, the mechanism which prevents that a pair of metal material of the combined state isolate | separates during shaping | molding of a bone component with a simple structure is realizable.

  A fourth feature of the bone component molding unit according to the present invention is that the molding machine is formed with a groove extending along a direction in which the molding machine is inserted into the case at a portion inserted into the case. It is that you are.

  According to this configuration, since the molding machine is provided with a groove extending along the case insertion direction, even if the molding machine is inserted in the case with moisture attached to the surface of the molding machine, It can be prevented that the inner surface and the surface of the molding machine are in close contact with each other and the molding machine is not easily removed from the case.

  According to a fifth feature of the bone component molding unit according to the present invention, in the molding machine in a combined state, an injection port that is in communication with the molding space and into which cement for forming the bone component is injected, A leakage hole is formed which communicates with the molding space and allows the cement injected from the injection port to leak out.

  According to this configuration, when cement is injected from the injection port, the molding space is first filled, and the overflowing cement is discharged from the leakage hole after filling in the molding space. Therefore, when cement is injected into the molding space, air can be prevented from being trapped in the molding space.

  A sixth feature of the bone component molding unit according to the present invention is that, in the pair of metal materials forming the molding space by being combined, the molding space, the injection port, and the leakage hole are in a halved state. And formed on each of the metal materials.

  According to this configuration, since the injection port and the leakage hole are formed in each metal material in a halved state, it is possible to facilitate cleaning of the portions where the injection port and the leakage hole are formed in each metal material. .

  A seventh feature of the bone component molding unit according to the present invention is that the leak hole is provided at a plurality of positions so that the cement injected from the injection port can leak through a plurality of leak paths. It is.

  According to this configuration, since the leakage holes through which the cement injected from the injection port leaks are provided at a plurality of positions, the cement overflowing after filling in the molding space can be more efficiently discharged from the leakage hole. Further, it is possible to further suppress air from being trapped in the molding space during cement injection.

  An eighth feature of the bone component molding unit according to the present invention is that the injection hole is provided in a central portion in the longitudinal direction of the molding device in a combined state, and the leakage holes are provided in both end portions of the molding device. It is being done.

  According to this configuration, the cement injected from the injection port provided in the longitudinal center portion of the molding machine is guided to be diverted to the leakage holes provided in both longitudinal end portions of the molding machine while being used for molding. It will be filled in the space and will be discharged from the two leak holes after the filling. For this reason, cement can be efficiently discharged from the two leakage holes after the molding space is filled, and air can be further prevented from being trapped in the molding space during cement injection.

  A ninth feature of the bone component molding unit according to the present invention is that, in the molding machine, a smoothing process for reducing the surface roughness is performed on an inner exposed surface of a portion forming the molding space. is there.

  According to this configuration, the inner exposed surface of the molding space is subjected to a smoothing process that reduces the surface roughness, so that the bone component and the inner exposed surface are hardly adhered. For this reason, the surface of the bone component can be naturally peeled from the inner exposed surface as the cement shrinks when the bone component is molded, and the mold release operation after molding can be performed more easily.

  A tenth feature of the bone component molding unit according to the present invention is that the smoothing process is a process of at least one of mirror finishing, titanium coating, and ceramic coating.

  According to this configuration, by performing at least one of mirror finishing, titanium coating, and ceramic coating on the inner exposed surface, sufficient smoothing processing that can easily perform the mold release operation is performed. Can be applied.

  In an eleventh feature of the bone component molding unit according to the present invention, a through hole is provided in one of the pair of metal materials forming the molding space by being combined, and the through hole is in a combined state. A shaft portion that is formed so as to open toward the other overlapping surface of the pair of metal materials and that can penetrate the through hole so that the tip side can come into contact with the other overlapping surface. It is further provided with the member for mold release which has.

  According to this configuration, the surface of the bone component and the inner exposed surface of the molding space seem to be fixed at the time of molding by inserting the release member into the through hole and bringing it into contact with the other overlapping surface. Even in such a case, the mold release operation can be easily performed.

  A twelfth feature of the bone component molding unit according to the present invention is that a female screw portion is formed on the inner periphery of the through hole, and a male screw portion that can be screwed with the female screw portion is formed on the outer periphery of the shaft portion. It has been done.

  According to this configuration, the mold release operation can be easily performed by screwing the male thread portion of the mold release member into the female thread portion on the inner periphery of the through hole.

  A thirteenth feature of the bone component molding unit according to the present invention is that the molding space is a space corresponding to the shape of a bone component for a hip prosthesis having a stem portion and a bone head, and the molding machine includes: Each of the pair of metal materials constituting the molding machine has a rectangular portion corresponding to each of the stem portion space forming the stem portion and the bone head space forming the bone head. The space for the stem portion and the space for the bone head in the split state are formed, and the rectangular portion corresponding to the space for the stem portion in each metal material is formed in a flat plate shape.

  According to this configuration, regarding a molding unit for a bone component for an artificial hip joint having a stem part and a bone head, a rectangular strip corresponding to the stem part space of the molding space is formed in a flat plate shape, It is possible to reduce the weight by thinning, to promote the effect of radiating heat generated when cement is solidified, and to improve the handleability during the molding operation.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is used in an operation for treatment when an infection develops in a site where artificial joint replacement has been performed, and is placed at the place where the artificial joint removed from the site has been placed The present invention can be widely applied as a bone component molding unit for molding a bone component mixed with a medicine. For example, it can be used as a bone component molding unit for artificial hip joints with a stem and a bone head, but is not limited to its use, and can be applied to a wider range of applications. Many different environments and various purposes Can be applied to. In the present embodiment, a case where the present invention is applied to a bone component molding unit for an artificial hip joint will be described as an example.

  FIG. 1 is a perspective view illustrating a bone component molding unit 1 (hereinafter simply referred to as a molding unit 1) according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the molding unit 1. As shown in FIGS. 1 and 2, the molding unit 1 includes a molding machine 11 and a case 12.

  As shown well in FIG. 2, the molding machine 11 is formed by a first molding machine 13 and a second molding machine 14 which are a pair of metal materials provided separately, and these first and second molding machines ( 13 and 14) are combined so as to overlap each other, thereby forming a bone component molding space 15 inside. As a metal material which comprises the molding machine 11 (the 1st molding machine 13, the 2nd molding machine 14), stainless steel, a titanium alloy etc. can be used as a metal which can be sterilized as a medical device material, for example.

  The molding space 15 forms a space corresponding to the shape of the bone component 101 for an artificial hip joint having a bone head portion 101a and a stem portion 101b as shown in FIG. The molding machine 11 includes a rectangular portion (13a, 14a) corresponding to the bone head 15a forming the bone head 101a and a rectangular portion (13b, 14b) corresponding to the stem portion space 15b forming the stem portion 101b. (See FIG. 2). That is, each of the first molding machine 13 and the second molding machine 14 which are a pair of metal materials constituting the molding machine 11 forms a stem portion space 15a and a bone head space 15b in a halved state. . Further, the rectangular portions (13b, 14b) corresponding to the stem space 15b in the first and second molding machines (13, 14) are formed in a flat plate shape. In the molding machine 11, a smoothing process for reducing the surface roughness is performed on the inner exposed surface of the part forming the molding space 15. As the smoothing treatment, for example, at least one of mirror finishing, titanium coating, and ceramic coating can be performed.

  FIG. 3 is an enlarged sectional view showing a part of the rectangular portion 13b of the first molding machine 13 and a part of the rectangular portion 14b of the second molding machine 14. As shown in FIG. 2 and FIG. 3, a convex portion 18 is formed on the overlapping surface 16 of the second molding device 14 that is one of the molding devices 11 that form the molding space 15 by being combined. A concave portion 19 corresponding to the shape of the convex portion 18 is formed on the overlapping surface 17 of the first molding device 13 which is the other of the vessel 11. In the present embodiment, the case where the convex portion 18 and the concave portion 19 correspond to a trapezoidal shape is illustrated.

  The molding machine 11 is formed with an inlet 20 and a leakage hole 21 in a combined state (see FIGS. 1 and 2). The injection port 20 communicates with the molding space 15 and is formed so that cement for forming the bone component 101 is injected. The injection port 20 is provided at a central portion in the longitudinal direction of the molding machine 11 in a combined state. On the other hand, the leak hole 21 communicates with the molding space 15 and is formed so that the cement injected from the injection port 20 can leak. The leakage holes 21 are provided at a plurality of positions so that the cement injected from the injection port 20 can be leaked through a plurality of leakage paths. Specifically, the leakage holes 21 are respectively provided at both end portions of the molding machine 11, and are formed in the leakage holes 21a provided in the rectangular portions (13a, 14a) and the rectangular portions (13b, 14b). The provided leakage hole 21b is provided. The molding space 15, the inlet 20, and the leakage hole 21 are formed in the first molding machine 13 and the second molding machine 14 in a half-split state, respectively.

  In addition, as shown in FIG. 2, the case 12 has one end of the combined molding machine 11 inserted therein and an opening 22 formed corresponding to the outer shape (substantially rectangular) on the one end. It is formed to have. The case 12 is formed in a cylindrical shape in which the side opposite to the side on which one end side of the molding machine 11 is inserted is also opened. The molding machine 11 is formed with a plurality of grooves 23 extending along the direction in which the molding machine 11 is inserted into the case 12 at the part inserted into the case 12.

  Further, the second molding machine 14 which is one of the molding machines 11 is provided with a plurality of through holes 24. The through hole 24 is formed so as to open toward the overlapping surface 17 in the other first molding device 13 in the combined molding device 11. And the molding unit 1 of this embodiment is further provided with the member 25 for mold release shown in FIG. The mold release member 25 has a shaft portion 26 through which each through hole 24 can be passed, and a shaft portion 26 projecting so that the tip end side thereof can come into contact with the overlapping surface 17 of the first molding machine 13. And a head 27 which becomes a knob operation part with a finger. A female screw portion is formed on the inner periphery of each through hole 24, and a male screw portion that can be screwed with the female screw portion is formed on the outer periphery of the shaft portion 26.

  Next, a method for creating the bone component 101 using the molding unit 1 will be described. Molding unit 1 is placed in the site where the hip prosthesis has been removed (the affected area where the infectious disease has developed) in an operation for treatment when an infectious disease develops in the site where the hip replacement (THA) has been performed It is used when molding bone components.

  In the above surgery, the unassembled molding unit 1 is prepared in the operating room in a state sterilized by steam sterilization. Then, the operator or his assistant (hereinafter referred to as an operator or the like) assembles the sterilized molding unit 1 in the operating room. In this case, the operator or the like positions the concave portion 19 of the first molding device 13 and the convex portion 18 of the second molding device 14 so as to fit together, and superimposes the first molding device 13 and the second molding device 14. . The molding machine 11 (the first molding machine 13 and the second molding machine 14) combined so as to be overlapped is inserted into the opening 22 of the case 12. Thereby, the assembly of the molding unit 1 is completed.

  For the molded unit 1 that has been assembled, the surgeon uses a cement gun or the like to inject a two-component cement mixed with an antibiotic (medicine) and mixed for a predetermined time. 20 is injected so as to be press-fitted into the molding unit 1. The cement injected from the injection port 20 is first filled in the molding space 15 and starts to leak from the leakage holes 21 (21a, 21b) when the molding space 15 is filled. At this time, the surgeon stops the operation of the cement gun and completes the press-fitting work of the cement into the molding space 15.

  The surgeon or the like waits for a predetermined time to elapse before the cement filled in the molding unit 1 is solidified, and then pulls out the molding machine 11 from the case 12, and further, the first molding machine 13 and the second molding machine. Separate the container 14. With the separation operation of the molding machine 11, a mold release operation for separating the bone component 101 formed in the molding space 15 from the molding machine 11 is also performed. When the overlapping surface 17 of the first molding device 13 and the overlapping surface 16 of the second molding device 14 are fixed and difficult to separate, the surgeon or the like removes the head 27 of the release member 25 from the head 27. The first molding device 13 and the second molding device 14 are separated by screwing the male screw portion of the shaft portion 26 into the female screw portion of the through hole 24 of the second molding device 14 while pinching with a finger. Can do. Further, by appropriately screwing the shaft portion 26 of the release member 25 to the plurality of through-holes 24 in order or repeatedly, the generation of an excessively concentrated load can be suppressed without difficulty. The 1 molding machine 13 and the 2nd molding machine 14 can be isolate | separated.

  After the mold release operation, the bone component 101 taken out from the molding unit 1 is embedded in the site where the artificial hip joint has been removed. The implanted bone component 101 is removed by surgery performed after a predetermined period of time, and replaced with an artificial hip joint.

According to the molding unit 1 described above, the first molding machine 13 and the second molding machine 14 which are a pair of metal materials are combined so as to overlap each other, whereby the molding space 15 for the bone component 101 is formed inside. It will be. The bone component 101 is molded by injecting and curing cement mixed with antibiotics into the molding space 15. Since the molding machine 11 composed of the first molding machine 13 and the second molding machine 14 is formed of a metal material, it has good heat resistance, and the injected cement deforms due to heat generation of the cement being molded and flows out. There is no such thing as doing it. And since it can be used by repeatedly performing steam sterilization without causing deformation of the molding machine 11 by performing steam sterilization once, it is low cost and suppresses the generation of industrial waste. It is possible to exert excellent effects from the viewpoint of environmental considerations.
In addition, since the molding machine 11 is formed as a pair of metal materials provided separately, it is possible to perform molding after simply separating the paired metal materials (the first molding machine 13 and the second molding machine 14). The mold release operation can be easily performed. In addition, the problem that the shape needs to be maintained as the hardness decreases due to heating by the heat generated by the cement during molding does not occur in the first place.

  Therefore, according to the molding unit 1, heat resistance is good, deformation during molding is less likely to occur, repeated use is possible even when steam sterilization is performed, low cost and excellent environmental considerations occur during molding. It is possible to obtain a bone component molding unit that can smoothly perform a mold release operation after molding without being affected by heat.

  Further, according to the molding unit 1, a convex portion 18 is formed on the overlapping surface 16 of the second molding device 14, and a concave portion corresponding to the shape of the convex portion 18 is formed on the overlapping surface 17 of the first molding device 13. Since 19 is formed, the overlapping surfaces of the first and second molding devices (13, 14) can be easily positioned at predetermined positions by fitting the convex portion 18 and the concave portion 19 together. . In addition, since it is not necessary to provide an intricately shaped combination mechanism such as a screw or a hinge, a combination mechanism excellent in cleaning properties can be easily realized.

  Further, according to the molding unit 1, the one end side is inserted into the case 12 having the opening 22 formed corresponding to the outer shape of the one end side of the molding machine 11 in the combined state. Thereby, the mechanism which prevents that the 1st shaping | molding machine 13 and the 2nd shaping | molding machine 14 of the state which combined were isolate | separated during shaping | molding of the bone component 101 is realizable with a simple structure.

  Further, according to the molding unit 1, since the molding machine 11 is provided with the groove 23 extending along the case insertion direction, the molding machine 11 was inserted into the case 12 with moisture or the like attached to the surface of the molding machine 11. Even if it is a case, it can prevent that the inner surface of case 12 and the surface of the molding machine 11 closely_contact | adhere, and the molding machine 11 becomes difficult to remove | deviate from the case 12. FIG.

  Further, according to the molding unit 1, when cement is injected from the injection port 20, the molding space 15 is first filled, and the cement overflowing after being filled in the molding space 15 is discharged from the leakage hole 21. Therefore, when cement is injected into the molding space 15, it is possible to prevent air from being trapped in the molding space 15.

  Further, according to the molding unit 1, since the injection port 20 and the leakage hole 21 are formed in the first molding device 13 and the second molding device 14 in a halved state, the first molding device 13 and the second molding device 14 are formed. It is possible to facilitate the cleaning of the portions where the injection port 20 and the leakage hole 21 are formed.

  Further, according to the molding unit 1, since the leakage holes 21 through which the cement injected from the injection port 20 leaks are provided at a plurality of positions, the cement overflowing after being filled in the molding space 15 is more efficiently leaked. It becomes easy to discharge | emit from the hole 21, and it can suppress more that air will be confine | sealed in the molding space 15 at the time of cement injection | pouring.

  Further, according to the molding unit 1, the cement injected from the injection port 20 provided at the center portion in the longitudinal direction of the molding machine 11 goes to the leakage holes (21 a, 21 b) provided at both longitudinal ends of the molding machine 11. It is filled in the molding space 15 while being guided so as to be shunted, and is discharged from the two leakage holes (21a, 21b) after the filling. For this reason, cement can be efficiently discharged from the two leakage holes (21a, 21b) after the molding space 15 is filled, and air can be further prevented from being trapped in the molding space 15 during cement injection. .

  Further, according to the molding unit 1, the inner exposed surface of the molding space 15 is subjected to the smoothing process for reducing the surface roughness, and therefore, the bone component 101 and the inner exposed surface are hardly adhered. For this reason, the surface of the bone component 101 can be naturally peeled from the inner exposed surface as the cement shrinks when the bone component 101 is molded, and the mold release operation after molding can be performed more easily. .

  Further, according to the molding unit 1, the mold release member 25 is inserted into the penetration 24 and brought into contact with the overlapping surface 17 of the first molding machine 13, so that the surface of the bone component 101 and the molding space 15 can be formed. Even in the case where the inner exposed surface is stuck, the mold release operation can be easily performed. Further, the mold release operation can be easily performed by screwing the male thread portion of the release member 25 into the female thread portion on the inner periphery of the through hole 24.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. For example, the shapes of the first molder 13, the second molder 14, the case 12, the convex portion 18, the concave portion 19, the through hole 24, the release member 25, etc. are not limited to those exemplified in the present embodiment. As long as it is described in the claims, the present invention may be widely modified. Further, the case 12, the convex portion 18, the concave portion 19, the through hole 24, and the release member 25 can be implemented without necessarily.

  The bone component molding unit of the present invention is used in an operation for treatment when an infection develops in a site where artificial joint replacement has been performed, and the place where the artificial joint removed from the site is placed And can be widely applied as a bone component molding unit that molds a bone component in which a medicine is mixed. For example, it can be used as a bone component molding unit for artificial hip joints with a stem and a bone head, but is not limited to its use, and can be applied to a wider range of applications. Many different environments and various purposes Can be applied to.

1 is a perspective view illustrating a bone component molding unit according to an embodiment of the invention. It is a disassembled perspective view of the bone component shaping | molding unit shown in FIG. It is sectional drawing which expands and shows a part of molding machine in the bone component molding unit shown in FIG. It is a perspective view which shows the member for mold release further provided in the bone component shaping | molding unit shown in FIG. It is a perspective view which shows the bone component shape | molded by the bone component shaping | molding unit shown in FIG.

Explanation of symbols

1 Bone component molding unit 11 Molder 12 Case 13 First molder (the other of a pair of metal materials)
14 Second molding machine (one of a pair of metal materials)
15 molding space 101 bone component

Claims (13)

Used in surgery for treatment when an infection occurs in a site where artificial joint replacement has been performed. A bone component molding unit for molding a bone component,
It is formed of a pair of metal materials provided separately, and includes a molding device that forms a space for molding the bone component inside by combining the pair of metal materials so as to overlap each other. Bone component molding unit.   A convex portion is formed on one overlapping surface of the pair of metal materials forming the molding space by being combined, and the other overlapping surface of the pair of metal materials corresponds to the shape of the convex portion. The bone component molding unit according to claim 1, wherein a concave portion is formed.   2. The apparatus according to claim 1, further comprising a case in which one end side of the molding device in a combined state is inserted and an opening is formed corresponding to the outer shape of the one end side. The bone component molding unit according to 2.   The bone component molding according to claim 3, wherein a groove extending along a direction in which the molding machine is inserted into the case is formed in the molding machine at a portion inserted into the case. unit.   In the molding machine in a combined state, an injection port that communicates with the molding space and is injected with cement for forming the bone component, and communicates with the molding space and is injected from the injection port. The bone component molding unit according to any one of claims 1 to 4, wherein a leakage hole through which the cement can leak is formed.   In the pair of metal materials forming the molding space by being combined, the molding space, the injection port, and the leakage hole are respectively formed in the respective metal materials in a halved state. The bone component molding unit according to claim 5.   The bone component molding unit according to claim 6, wherein the leakage holes are provided at a plurality of positions so that the cement injected from the injection port can leak through a plurality of leakage paths.   The bone according to claim 7, wherein the injection hole is provided in a central portion in a longitudinal direction of the molding device in a combined state, and the leakage holes are provided in both end portions of the molding device, respectively. Component molding unit.   The smoothing process which reduces surface roughness is given to the inner side exposed surface of the part which forms the said space for shaping | molding in the said molding machine, The any one of Claim 1 thru | or 8 characterized by the above-mentioned. The bone component molding unit described in 1.   The bone component molding unit according to claim 9, wherein the smoothing process is a process of at least one of mirror finishing, titanium coating, and ceramic coating. A through hole is provided in one of the pair of metal materials forming the molding space by being combined, and the through hole opens toward the other overlapping surface of the pair of metal materials in a combined state. Is formed to
11. The mold release member according to claim 1, further comprising a shaft portion capable of penetrating the through hole so that a tip side can be brought into contact with the other overlapping surface. The bone component molding unit according to any one of the above.   12. The bone according to claim 11, wherein an internal thread portion is formed on an inner periphery of the through hole, and an external thread portion that can be screwed with the internal thread portion is formed on an outer periphery of the shaft portion. Component molding unit. The molding space is a space corresponding to the shape of a bone component for an artificial hip joint having a stem portion and a bone head,
The molding machine has rectangular portions respectively corresponding to a stem portion space forming the stem portion and a bone head space forming the bone head,
Each of the pair of each metal material constituting the molding machine forms the space for the stem part and the space for the bone head in a halved state,
The bone component molding unit according to any one of claims 1 to 12, wherein a rectangular portion corresponding to the space for the stem portion in each metal material is formed in a flat plate shape.

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